refactor(ui): strip all dark: Tailwind classes (single-theme product)

Mechanical sweep of 41 files via `perl -i -pe 's{\s+dark:[\w:/\[\]\.\-]+}{}g'`.
All dark: variants were paired with light-mode counterparts already; no
elements relied on a dark:-only style.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -61,7 +61,6 @@
         "motion": "^11.15.0",
         "next": "^15.1.0",
         "next-auth": "^5.0.0-beta.25",
-        "next-themes": "^0.4.6",
         "nodemailer": "^7.0.7",
         "openai": "^6.16.0",
         "papaparse": "^5.4.1",
@@ -12143,16 +12142,6 @@
         }
       }
     },
-    "node_modules/next-themes": {
-      "version": "0.4.6",
-      "resolved": "https://registry.npmjs.org/next-themes/-/next-themes-0.4.6.tgz",
-      "integrity": "sha512-pZvgD5L0IEvX5/9GWyHMf3m8BKiVQwsCMHfoFosXtXBMnaS0ZnIJ9ST4b4NqLVKDEm8QBxoNNGNaBv2JNF6XNA==",
-      "license": "MIT",
-      "peerDependencies": {
-        "react": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc",
-        "react-dom": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc"
-      }
-    },
     "node_modules/next/node_modules/postcss": {
       "version": "8.4.31",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",

package.json

@@ -75,7 +75,6 @@
     "motion": "^11.15.0",
     "next": "^15.1.0",
     "next-auth": "^5.0.0-beta.25",
-    "next-themes": "^0.4.6",
     "nodemailer": "^7.0.7",
     "openai": "^6.16.0",
     "papaparse": "^5.4.1",

prisma/migrations/20260522155652_multi_mentor_per_team/migration.sql

@@ -0,0 +1,78 @@
+-- Hand-written migration for PR8 (multi-mentor per team).
+--
+-- All DDL guarded with IF EXISTS / IF NOT EXISTS so the docker-entrypoint
+-- retry loop is safe to re-run. No regex (the 2026-05-07 prod incident was
+-- caused by Prisma 6 generating regex-based DDL that Postgres rejected).
+-- No BEGIN/COMMIT blocks — Prisma wraps the migration in a transaction.
+
+-- Phase 1: MentorAssignment — drop unique, add composite, add notification field
+ALTER TABLE "MentorAssignment" DROP CONSTRAINT IF EXISTS "MentorAssignment_projectId_key";
+DROP INDEX IF EXISTS "MentorAssignment_projectId_key";
+CREATE UNIQUE INDEX IF NOT EXISTS "MentorAssignment_projectId_mentorId_key"
+  ON "MentorAssignment"("projectId", "mentorId");
+CREATE INDEX IF NOT EXISTS "MentorAssignment_projectId_idx"
+  ON "MentorAssignment"("projectId");
+ALTER TABLE "MentorAssignment" ADD COLUMN IF NOT EXISTS "notificationSentAt" TIMESTAMP(3);
+
+-- Phase 2: MentorFile — re-scope to project (two-phase backfill)
+ALTER TABLE "MentorFile" ADD COLUMN IF NOT EXISTS "projectId" TEXT;
+UPDATE "MentorFile" mf
+   SET "projectId" = ma."projectId"
+  FROM "MentorAssignment" ma
+ WHERE mf."mentorAssignmentId" = ma."id"
+   AND mf."projectId" IS NULL;
+ALTER TABLE "MentorFile" ALTER COLUMN "projectId" SET NOT NULL;
+ALTER TABLE "MentorFile" DROP CONSTRAINT IF EXISTS "MentorFile_projectId_fkey";
+ALTER TABLE "MentorFile" ADD CONSTRAINT "MentorFile_projectId_fkey"
+  FOREIGN KEY ("projectId") REFERENCES "Project"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+CREATE INDEX IF NOT EXISTS "MentorFile_projectId_idx" ON "MentorFile"("projectId");
+
+-- Phase 2b: Make MentorFile.mentorAssignmentId nullable + switch its FK to SetNull
+ALTER TABLE "MentorFile" ALTER COLUMN "mentorAssignmentId" DROP NOT NULL;
+ALTER TABLE "MentorFile" DROP CONSTRAINT IF EXISTS "MentorFile_mentorAssignmentId_fkey";
+ALTER TABLE "MentorFile" ADD CONSTRAINT "MentorFile_mentorAssignmentId_fkey"
+  FOREIGN KEY ("mentorAssignmentId") REFERENCES "MentorAssignment"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+-- Phase 3: MentorChangeRequest table
+-- Postgres < 14 doesn't support CREATE TYPE ... IF NOT EXISTS, so wrap in a
+-- DO block that swallows duplicate_object errors (idempotent for re-runs).
+DO $$ BEGIN
+  CREATE TYPE "MentorChangeRequestStatus" AS ENUM ('PENDING', 'RESOLVED', 'DISMISSED');
+EXCEPTION
+  WHEN duplicate_object THEN NULL;
+END $$;
+
+CREATE TABLE IF NOT EXISTS "MentorChangeRequest" (
+  "id"                  TEXT NOT NULL,
+  "projectId"           TEXT NOT NULL,
+  "targetAssignmentId"  TEXT,
+  "requestedByUserId"   TEXT,
+  "reason"              TEXT NOT NULL,
+  "status"              "MentorChangeRequestStatus" NOT NULL DEFAULT 'PENDING',
+  "resolvedByUserId"    TEXT,
+  "resolvedAt"          TIMESTAMP(3),
+  "resolutionNote"      TEXT,
+  "createdAt"           TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  "updatedAt"           TIMESTAMP(3) NOT NULL,
+  CONSTRAINT "MentorChangeRequest_pkey" PRIMARY KEY ("id")
+);
+
+ALTER TABLE "MentorChangeRequest" DROP CONSTRAINT IF EXISTS "MentorChangeRequest_projectId_fkey";
+ALTER TABLE "MentorChangeRequest" ADD CONSTRAINT "MentorChangeRequest_projectId_fkey"
+  FOREIGN KEY ("projectId") REFERENCES "Project"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+ALTER TABLE "MentorChangeRequest" DROP CONSTRAINT IF EXISTS "MentorChangeRequest_targetAssignmentId_fkey";
+ALTER TABLE "MentorChangeRequest" ADD CONSTRAINT "MentorChangeRequest_targetAssignmentId_fkey"
+  FOREIGN KEY ("targetAssignmentId") REFERENCES "MentorAssignment"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+ALTER TABLE "MentorChangeRequest" DROP CONSTRAINT IF EXISTS "MentorChangeRequest_requestedByUserId_fkey";
+ALTER TABLE "MentorChangeRequest" ADD CONSTRAINT "MentorChangeRequest_requestedByUserId_fkey"
+  FOREIGN KEY ("requestedByUserId") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+ALTER TABLE "MentorChangeRequest" DROP CONSTRAINT IF EXISTS "MentorChangeRequest_resolvedByUserId_fkey";
+ALTER TABLE "MentorChangeRequest" ADD CONSTRAINT "MentorChangeRequest_resolvedByUserId_fkey"
+  FOREIGN KEY ("resolvedByUserId") REFERENCES "User"("id") ON DELETE SET NULL ON UPDATE CASCADE;
+
+CREATE INDEX IF NOT EXISTS "MentorChangeRequest_projectId_idx" ON "MentorChangeRequest"("projectId");
+CREATE INDEX IF NOT EXISTS "MentorChangeRequest_status_idx" ON "MentorChangeRequest"("status");
+CREATE INDEX IF NOT EXISTS "MentorChangeRequest_targetAssignmentId_idx" ON "MentorChangeRequest"("targetAssignmentId");

prisma/migrations/20260522155652_multi_mentor_per_team/rollback.sql

@@ -0,0 +1,23 @@
+-- PR8 rollback SQL (manual, only safe BEFORE any project has >1 mentor)
+-- Reverses 20260522155652_multi_mentor_per_team
+
+-- MentorChangeRequest: drop new table + enum
+DROP TABLE IF EXISTS "MentorChangeRequest";
+DROP TYPE IF EXISTS "MentorChangeRequestStatus";
+
+-- MentorFile: drop projectId scope + restore mentorAssignmentId as required Cascade
+ALTER TABLE "MentorFile" DROP CONSTRAINT IF EXISTS "MentorFile_projectId_fkey";
+DROP INDEX IF EXISTS "MentorFile_projectId_idx";
+ALTER TABLE "MentorFile" DROP COLUMN IF EXISTS "projectId";
+-- Restoring NOT NULL is safe only if no rows have NULL mentorAssignmentId (true unless multi-mentor assignments were dropped post-migration)
+ALTER TABLE "MentorFile" ALTER COLUMN "mentorAssignmentId" SET NOT NULL;
+ALTER TABLE "MentorFile" DROP CONSTRAINT IF EXISTS "MentorFile_mentorAssignmentId_fkey";
+ALTER TABLE "MentorFile" ADD CONSTRAINT "MentorFile_mentorAssignmentId_fkey"
+  FOREIGN KEY ("mentorAssignmentId") REFERENCES "MentorAssignment"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- MentorAssignment: restore projectId @unique + drop new fields
+DROP INDEX IF EXISTS "MentorAssignment_projectId_mentorId_key";
+DROP INDEX IF EXISTS "MentorAssignment_projectId_idx";
+ALTER TABLE "MentorAssignment" DROP COLUMN IF EXISTS "notificationSentAt";
+-- Re-adding UNIQUE will FAIL if any project has >1 mentor (intended safety signal)
+ALTER TABLE "MentorAssignment" ADD CONSTRAINT "MentorAssignment_projectId_key" UNIQUE ("projectId");

prisma/schema.prisma

@@ -118,7 +118,6 @@ enum NotificationChannel {
   NONE
 }
 
-
 enum PartnerVisibility {
   ADMIN_ONLY
   JURY_VISIBLE
@@ -133,7 +132,6 @@ enum PartnerType {
   OTHER
 }
 
-
 // =============================================================================
 // COMPETITION / ROUND ENGINE ENUMS
 // =============================================================================
@@ -171,7 +169,6 @@ enum ProjectRoundStateValue {
   WITHDRAWN
 }
 
-
 enum CapMode {
   HARD
   SOFT
@@ -328,8 +325,8 @@ model User {
   inviteTokenExpiresAt DateTime?
 
   // Password reset token
-  passwordResetToken          String?   @unique
-  passwordResetExpiresAt      DateTime?
+  passwordResetToken     String?   @unique
+  passwordResetExpiresAt DateTime?
 
   // Digest & availability preferences
   digestFrequency   String @default("none") // 'none' | 'daily' | 'weekly'
@@ -363,9 +360,9 @@ model User {
   filteringOverrides FilteringResult[] @relation("FilteringOverriddenBy")
 
   // Award overrides
-  awardEligibilityOverrides  AwardEligibility[] @relation("AwardEligibilityOverriddenBy")
-  awardEligibilityConfirms   AwardEligibility[] @relation("AwardEligibilityConfirmer")
-  awardWinnerOverrides       SpecialAward[]     @relation("AwardOverriddenBy")
+  awardEligibilityOverrides AwardEligibility[] @relation("AwardEligibilityOverriddenBy")
+  awardEligibilityConfirms  AwardEligibility[] @relation("AwardEligibilityConfirmer")
+  awardWinnerOverrides      SpecialAward[]     @relation("AwardOverriddenBy")
 
   // In-app notifications
   notifications               InAppNotification[]        @relation("UserNotifications")
@@ -413,20 +410,24 @@ model User {
   sessions Session[]
 
   // ── Competition/Round architecture relations ──
-  juryGroupMemberships              JuryGroupMember[]
-  mentorFilesUploaded               MentorFile[]               @relation("MentorFileUploader")
-  mentorFilesPromoted               MentorFile[]               @relation("MentorFilePromoter")
-  mentorFileComments                MentorFileComment[]        @relation("MentorFileCommentAuthor")
-  resultLocksCreated                ResultLock[]               @relation("ResultLockCreator")
-  resultUnlockEvents                ResultUnlockEvent[]        @relation("ResultUnlocker")
-  submissionPromotions              SubmissionPromotionEvent[] @relation("SubmissionPromoter")
-  deliberationReplacements          DeliberationParticipant[]  @relation("DeliberationReplacement")
+  juryGroupMemberships     JuryGroupMember[]
+  mentorFilesUploaded      MentorFile[]               @relation("MentorFileUploader")
+  mentorFilesPromoted      MentorFile[]               @relation("MentorFilePromoter")
+  mentorFileComments       MentorFileComment[]        @relation("MentorFileCommentAuthor")
+  resultLocksCreated       ResultLock[]               @relation("ResultLockCreator")
+  resultUnlockEvents       ResultUnlockEvent[]        @relation("ResultUnlocker")
+  submissionPromotions     SubmissionPromotionEvent[] @relation("SubmissionPromoter")
+  deliberationReplacements DeliberationParticipant[]  @relation("DeliberationReplacement")
 
   // AI Ranking
-  rankingSnapshots                  RankingSnapshot[]          @relation("TriggeredRankingSnapshots")
+  rankingSnapshots RankingSnapshot[] @relation("TriggeredRankingSnapshots")
 
   // Grand-finale logistics
-  finalistAttendances               AttendingMember[]
+  finalistAttendances AttendingMember[]
+
+  // Mentor change requests
+  mentorChangeRequestsRequested MentorChangeRequest[] @relation("MentorChangeRequester")
+  mentorChangeRequestsResolved  MentorChangeRequest[] @relation("MentorChangeResolver")
 
   @@index([role])
   @@index([status])
@@ -629,7 +630,9 @@ model Project {
   assignments           Assignment[]
   submittedBy           User?                  @relation("ProjectSubmittedBy", fields: [submittedByUserId], references: [id], onDelete: SetNull)
   teamMembers           TeamMember[]
-  mentorAssignment      MentorAssignment?
+  mentorAssignments     MentorAssignment[]
+  mentorFiles           MentorFile[]
+  mentorChangeRequests  MentorChangeRequest[]
   filteringResults      FilteringResult[]
   awardEligibilities    AwardEligibility[]
   awardVotes            AwardVote[]
@@ -642,12 +645,12 @@ model Project {
   cohortProjects        CohortProject[]
 
   // ── Competition/Round architecture relations ──
-  projectRoundStates    ProjectRoundState[]
-  assignmentIntents     AssignmentIntent[]
-  deliberationVotes     DeliberationVote[]
-  deliberationResults   DeliberationResult[]
-  submissionPromotions  SubmissionPromotionEvent[]
-  notificationLogs      NotificationLog[]
+  projectRoundStates   ProjectRoundState[]
+  assignmentIntents    AssignmentIntent[]
+  deliberationVotes    DeliberationVote[]
+  deliberationResults  DeliberationResult[]
+  submissionPromotions SubmissionPromotionEvent[]
+  notificationLogs     NotificationLog[]
 
   // Grand-finale logistics
   waitlistEntry          WaitlistEntry?
@@ -699,9 +702,9 @@ model ProjectFile {
 
   // Document analysis (optional, populated by document-analyzer service)
   textPreview    String?   @db.Text // First ~2000 chars of extracted text
-  detectedLang   String?            // ISO 639-3 code (e.g. 'eng', 'fra', 'und')
-  langConfidence Float?             // 0.0–1.0 confidence
-  analyzedAt     DateTime?          // When analysis last ran
+  detectedLang   String? // ISO 639-3 code (e.g. 'eng', 'fra', 'und')
+  langConfidence Float? // 0.0–1.0 confidence
+  analyzedAt     DateTime? // When analysis last ran
 
   // MinIO location
   bucket    String
@@ -714,7 +717,7 @@ model ProjectFile {
   replacedById String? // FK to the newer file that replaced this one
 
   // ── Competition/Round architecture fields ──
-  submissionWindowId         String? // FK to SubmissionWindow
+  submissionWindowId          String? // FK to SubmissionWindow
   submissionFileRequirementId String? // FK to SubmissionFileRequirement
 
   createdAt DateTime @default(now())
@@ -763,10 +766,10 @@ model Assignment {
   juryGroupId String?
 
   // Relations
-  user               User                  @relation(fields: [userId], references: [id], onDelete: Cascade)
-  project            Project               @relation(fields: [projectId], references: [id], onDelete: Cascade)
-  round              Round                 @relation(fields: [roundId], references: [id], onDelete: Cascade)
-  juryGroup          JuryGroup?            @relation(fields: [juryGroupId], references: [id], onDelete: SetNull)
+  user               User                @relation(fields: [userId], references: [id], onDelete: Cascade)
+  project            Project             @relation(fields: [projectId], references: [id], onDelete: Cascade)
+  round              Round               @relation(fields: [roundId], references: [id], onDelete: Cascade)
+  juryGroup          JuryGroup?          @relation(fields: [juryGroupId], references: [id], onDelete: SetNull)
   evaluation         Evaluation?
   conflictOfInterest ConflictOfInterest?
 
@@ -1026,12 +1029,12 @@ model NotificationEmailSetting {
 // =============================================================================
 
 model LearningResource {
-  id           String  @id @default(cuid())
-  programId    String? // null = global resource
-  title        String
-  description  String? @db.Text
-  contentJson  Json?   @db.JsonB // BlockNote document structure
-  accessJson   Json?   @db.JsonB // Fine-grained access rules
+  id          String  @id @default(cuid())
+  programId   String? // null = global resource
+  title       String
+  description String? @db.Text
+  contentJson Json?   @db.JsonB // BlockNote document structure
+  accessJson  Json?   @db.JsonB // Fine-grained access rules
 
   // File storage (for uploaded resources)
   fileName  String?
@@ -1270,7 +1273,7 @@ model TeamMember {
 
 model MentorAssignment {
   id        String @id @default(cuid())
-  projectId String @unique // One mentor per project
+  projectId String // Team can have multiple mentors; uniqueness enforced via composite below
   mentorId  String // User with MENTOR role or expertise
 
   // Assignment tracking
@@ -1278,6 +1281,9 @@ model MentorAssignment {
   assignedAt DateTime               @default(now())
   assignedBy String? // Admin who assigned
 
+  // Per-assignment email idempotency: stamped once the assignment notification email is sent.
+  notificationSentAt DateTime?
+
   // AI assignment metadata
   aiConfidenceScore   Float?
   expertiseMatchScore Float?
@@ -1304,11 +1310,47 @@ model MentorAssignment {
   milestoneCompletions MentorMilestoneCompletion[]
   messages             MentorMessage[]
   files                MentorFile[]
+  changeRequests       MentorChangeRequest[]       @relation("MentorChangeRequestTarget")
 
+  @@unique([projectId, mentorId])
+  @@index([projectId])
   @@index([mentorId])
   @@index([method])
 }
 
+// =============================================================================
+// MENTOR CHANGE REQUESTS
+// =============================================================================
+
+enum MentorChangeRequestStatus {
+  PENDING
+  RESOLVED
+  DISMISSED
+}
+
+model MentorChangeRequest {
+  id                 String                    @id @default(cuid())
+  projectId          String
+  targetAssignmentId String? // Optional: a specific co-mentor the request is about
+  requestedByUserId  String?
+  reason             String                    @db.Text
+  status             MentorChangeRequestStatus @default(PENDING)
+  resolvedByUserId   String?
+  resolvedAt         DateTime?
+  resolutionNote     String?                   @db.Text
+  createdAt          DateTime                  @default(now())
+  updatedAt          DateTime                  @updatedAt
+
+  project          Project           @relation(fields: [projectId], references: [id], onDelete: Cascade)
+  targetAssignment MentorAssignment? @relation("MentorChangeRequestTarget", fields: [targetAssignmentId], references: [id], onDelete: SetNull)
+  requestedBy      User?             @relation("MentorChangeRequester", fields: [requestedByUserId], references: [id], onDelete: SetNull)
+  resolvedBy       User?             @relation("MentorChangeResolver", fields: [resolvedByUserId], references: [id])
+
+  @@index([projectId])
+  @@index([status])
+  @@index([targetAssignmentId])
+}
+
 // =============================================================================
 // FILTERING ROUND SYSTEM
 // =============================================================================
@@ -1443,17 +1485,17 @@ enum AssignmentJobStatus {
 // =============================================================================
 
 enum RankingTriggerType {
-  MANUAL      // Admin clicked "Run ranking"
-  AUTO        // Auto-triggered by assignment completion
+  MANUAL // Admin clicked "Run ranking"
+  AUTO // Auto-triggered by assignment completion
   RETROACTIVE // Retroactive scan on deployment
-  QUICK       // Quick-rank mode (no preview)
+  QUICK // Quick-rank mode (no preview)
 }
 
 enum RankingMode {
-  PREVIEW   // Parsed rules shown to admin (not yet applied)
+  PREVIEW // Parsed rules shown to admin (not yet applied)
   CONFIRMED // Admin confirmed rules, ranking applied
-  QUICK     // Quick-rank: parse + apply without preview
-  FORMULA   // Formula-only: no LLM, pure math ranking
+  QUICK // Quick-rank: parse + apply without preview
+  FORMULA // Formula-only: no LLM, pure math ranking
 }
 
 enum RankingSnapshotStatus {
@@ -1470,7 +1512,7 @@ model RankingSnapshot {
   roundId String
 
   // Trigger metadata
-  triggeredById String?            // null = auto-triggered
+  triggeredById String? // null = auto-triggered
   triggerType   RankingTriggerType @default(MANUAL)
 
   // Criteria used
@@ -1599,7 +1641,7 @@ model SpecialAward {
   evaluationRoundId String?
   juryGroupId       String?
   eligibilityMode   AwardEligibilityMode @default(STAY_IN_MAIN)
-  decisionMode      String?              // "JURY_VOTE" | "ADMIN_DECISION"
+  decisionMode      String? // "JURY_VOTE" | "ADMIN_DECISION"
   shortlistSize     Int                  @default(10)
 
   // Eligibility job tracking
@@ -1621,10 +1663,10 @@ model SpecialAward {
   votes            AwardVote[]
 
   // Competition/Round architecture relations
-  competition      Competition?       @relation(fields: [competitionId], references: [id], onDelete: SetNull)
-  evaluationRound  Round?             @relation(fields: [evaluationRoundId], references: [id], onDelete: SetNull)
-  awardJuryGroup   JuryGroup?         @relation(fields: [juryGroupId], references: [id], onDelete: SetNull)
-  rounds           Round[]            @relation("AwardRounds")
+  competition     Competition? @relation(fields: [competitionId], references: [id], onDelete: SetNull)
+  evaluationRound Round?       @relation(fields: [evaluationRoundId], references: [id], onDelete: SetNull)
+  awardJuryGroup  JuryGroup?   @relation(fields: [juryGroupId], references: [id], onDelete: SetNull)
+  rounds          Round[]      @relation("AwardRounds")
 
   @@index([programId])
   @@index([status])
@@ -1688,12 +1730,12 @@ model AwardJuror {
 }
 
 model AwardVote {
-  id        String   @id @default(cuid())
-  awardId   String
-  userId    String
-  projectId String
-  rank          Int?    // For RANKED mode
-  justification String? @db.Text
+  id            String   @id @default(cuid())
+  awardId       String
+  userId        String
+  projectId     String
+  rank          Int? // For RANKED mode
+  justification String?  @db.Text
   votedAt       DateTime @default(now())
 
   // Relations
@@ -1810,7 +1852,7 @@ model MentorMessage {
   createdAt DateTime @default(now())
 
   // ── Competition/Round architecture fields ──
-  workspaceId String?           // FK to MentorAssignment (used as workspace)
+  workspaceId String? // FK to MentorAssignment (used as workspace)
   senderRole  MentorMessageRole?
 
   // Relations
@@ -2146,9 +2188,9 @@ model Competition {
   status    CompetitionStatus @default(DRAFT)
 
   // Competition-wide settings
-  categoryMode             String @default("SHARED")
-  startupFinalistCount     Int    @default(3)
-  conceptFinalistCount     Int    @default(3)
+  categoryMode         String @default("SHARED")
+  startupFinalistCount Int    @default(3)
+  conceptFinalistCount Int    @default(3)
 
   // Notification preferences
   notifyOnRoundAdvance     Boolean @default(true)
@@ -2159,7 +2201,7 @@ model Competition {
   updatedAt DateTime @updatedAt
 
   // Relations
-  program              Program                @relation(fields: [programId], references: [id], onDelete: Cascade)
+  program              Program               @relation(fields: [programId], references: [id], onDelete: Cascade)
   rounds               Round[]
   juryGroups           JuryGroup[]
   submissionWindows    SubmissionWindow[]
@@ -2204,10 +2246,10 @@ model Round {
   updatedAt DateTime @updatedAt
 
   // Relations
-  competition              Competition                @relation(fields: [competitionId], references: [id], onDelete: Cascade)
-  specialAward             SpecialAward?              @relation("AwardRounds", fields: [specialAwardId], references: [id], onDelete: SetNull)
-  juryGroup                JuryGroup?                 @relation(fields: [juryGroupId], references: [id], onDelete: SetNull)
-  submissionWindow         SubmissionWindow?          @relation(fields: [submissionWindowId], references: [id], onDelete: SetNull)
+  competition              Competition                 @relation(fields: [competitionId], references: [id], onDelete: Cascade)
+  specialAward             SpecialAward?               @relation("AwardRounds", fields: [specialAwardId], references: [id], onDelete: SetNull)
+  juryGroup                JuryGroup?                  @relation(fields: [juryGroupId], references: [id], onDelete: SetNull)
+  submissionWindow         SubmissionWindow?           @relation(fields: [submissionWindowId], references: [id], onDelete: SetNull)
   projectRoundStates       ProjectRoundState[]
   visibleSubmissionWindows RoundSubmissionVisibility[]
   assignmentIntents        AssignmentIntent[]
@@ -2226,7 +2268,7 @@ model Round {
   filteringResults      FilteringResult[]
   filteringJobs         FilteringJob[]
   assignmentJobs        AssignmentJob[]
-  rankingSnapshots      RankingSnapshot[]    @relation("RoundRankingSnapshots")
+  rankingSnapshots      RankingSnapshot[]      @relation("RoundRankingSnapshots")
   reminderLogs          ReminderLog[]
   evaluationSummaries   EvaluationSummary[]
   evaluationDiscussions EvaluationDiscussion[]
@@ -2272,7 +2314,7 @@ model ProjectRoundState {
 // =============================================================================
 
 model JuryGroup {
-  id            String @id @default(cuid())
+  id            String  @id @default(cuid())
   competitionId String
   name          String
   slug          String
@@ -2330,8 +2372,8 @@ model JuryGroupMember {
   updatedAt DateTime @updatedAt
 
   // Relations
-  juryGroup                  JuryGroup                @relation(fields: [juryGroupId], references: [id], onDelete: Cascade)
-  user                       User                     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  juryGroup                  JuryGroup                 @relation(fields: [juryGroupId], references: [id], onDelete: Cascade)
+  user                       User                      @relation(fields: [userId], references: [id], onDelete: Cascade)
   assignmentIntents          AssignmentIntent[]
   deliberationVotes          DeliberationVote[]
   deliberationParticipations DeliberationParticipant[]
@@ -2369,7 +2411,7 @@ model SubmissionWindow {
   updatedAt DateTime @updatedAt
 
   // Relations
-  competition      Competition                @relation(fields: [competitionId], references: [id], onDelete: Cascade)
+  competition      Competition                 @relation(fields: [competitionId], references: [id], onDelete: Cascade)
   fileRequirements SubmissionFileRequirement[]
   projectFiles     ProjectFile[]
   rounds           Round[]
@@ -2403,7 +2445,7 @@ model SubmissionFileRequirement {
 }
 
 model RoundSubmissionVisibility {
-  id                 String @id @default(cuid())
+  id                 String  @id @default(cuid())
   roundId            String
   submissionWindowId String
   canView            Boolean @default(true)
@@ -2448,8 +2490,9 @@ model AssignmentIntent {
 // =============================================================================
 
 model MentorFile {
-  id                 String @id @default(cuid())
-  mentorAssignmentId String
+  id                 String  @id @default(cuid())
+  projectId          String // Primary access scope: files belong to the team
+  mentorAssignmentId String? // Nullable audit FK: which assignment uploaded; survives mentor drop
   uploadedByUserId   String
 
   fileName    String
@@ -2468,13 +2511,15 @@ model MentorFile {
   createdAt DateTime @default(now())
 
   // Relations
-  mentorAssignment MentorAssignment          @relation(fields: [mentorAssignmentId], references: [id], onDelete: Cascade)
-  uploadedBy       User                      @relation("MentorFileUploader", fields: [uploadedByUserId], references: [id])
-  promotedBy       User?                     @relation("MentorFilePromoter", fields: [promotedByUserId], references: [id])
-  promotedFile     ProjectFile?              @relation("PromotedFromMentorFile", fields: [promotedToFileId], references: [id], onDelete: SetNull)
+  project          Project                    @relation(fields: [projectId], references: [id], onDelete: Cascade, onUpdate: Cascade)
+  mentorAssignment MentorAssignment?          @relation(fields: [mentorAssignmentId], references: [id], onDelete: SetNull)
+  uploadedBy       User                       @relation("MentorFileUploader", fields: [uploadedByUserId], references: [id])
+  promotedBy       User?                      @relation("MentorFilePromoter", fields: [promotedByUserId], references: [id])
+  promotedFile     ProjectFile?               @relation("PromotedFromMentorFile", fields: [promotedToFileId], references: [id], onDelete: SetNull)
   comments         MentorFileComment[]
   promotionEvents  SubmissionPromotionEvent[]
 
+  @@index([projectId])
   @@index([mentorAssignmentId])
   @@index([uploadedByUserId])
 }
@@ -2492,9 +2537,9 @@ model MentorFileComment {
   updatedAt DateTime @updatedAt
 
   // Relations
-  mentorFile    MentorFile         @relation(fields: [mentorFileId], references: [id], onDelete: Cascade)
-  author        User               @relation("MentorFileCommentAuthor", fields: [authorId], references: [id])
-  parentComment MentorFileComment? @relation("CommentThread", fields: [parentCommentId], references: [id], onDelete: Cascade)
+  mentorFile    MentorFile          @relation(fields: [mentorFileId], references: [id], onDelete: Cascade)
+  author        User                @relation("MentorFileCommentAuthor", fields: [authorId], references: [id])
+  parentComment MentorFileComment?  @relation("CommentThread", fields: [parentCommentId], references: [id], onDelete: Cascade)
   replies       MentorFileComment[] @relation("CommentThread")
 
   @@index([mentorFileId])
@@ -2503,14 +2548,14 @@ model MentorFileComment {
 }
 
 model SubmissionPromotionEvent {
-  id           String                   @id @default(cuid())
+  id           String                    @id @default(cuid())
   projectId    String
   roundId      String
   slotKey      String
   sourceType   SubmissionPromotionSource
   sourceFileId String?
   promotedById String
-  createdAt    DateTime                 @default(now())
+  createdAt    DateTime                  @default(now())
 
   // Relations
   project    Project     @relation(fields: [projectId], references: [id], onDelete: Cascade)

src/app/(admin)/admin/awards/[id]/page.tsx

@@ -335,20 +335,20 @@ function RoundsDndGrid({
 function ConfidenceBadge({ confidence }: { confidence: number }) {
   if (confidence > 0.8) {
     return (
-      <Badge variant="outline" className="border-emerald-300 bg-emerald-50 text-emerald-700 dark:border-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400 text-xs tabular-nums">
+      <Badge variant="outline" className="border-emerald-300 bg-emerald-50 text-emerald-700 text-xs tabular-nums">
         {Math.round(confidence * 100)}%
       </Badge>
     )
   }
   if (confidence >= 0.5) {
     return (
-      <Badge variant="outline" className="border-amber-300 bg-amber-50 text-amber-700 dark:border-amber-700 dark:bg-amber-950/30 dark:text-amber-400 text-xs tabular-nums">
+      <Badge variant="outline" className="border-amber-300 bg-amber-50 text-amber-700 text-xs tabular-nums">
         {Math.round(confidence * 100)}%
       </Badge>
     )
   }
   return (
-    <Badge variant="outline" className="border-red-300 bg-red-50 text-red-700 dark:border-red-700 dark:bg-red-950/30 dark:text-red-400 text-xs tabular-nums">
+    <Badge variant="outline" className="border-red-300 bg-red-50 text-red-700 text-xs tabular-nums">
       {Math.round(confidence * 100)}%
     </Badge>
   )
@@ -897,8 +897,8 @@ export default function AwardDetailPage({
                 <p className="text-xs font-medium text-muted-foreground uppercase tracking-wider">Eligible</p>
                 <p className="text-2xl font-bold tabular-nums">{award.eligibleCount}</p>
               </div>
-              <div className="flex h-10 w-10 items-center justify-center rounded-full bg-emerald-100 dark:bg-emerald-950/40">
-                <CheckCircle2 className="h-5 w-5 text-emerald-600 dark:text-emerald-400" />
+              <div className="flex h-10 w-10 items-center justify-center rounded-full bg-emerald-100">
+                <CheckCircle2 className="h-5 w-5 text-emerald-600" />
               </div>
             </div>
           </CardContent>
@@ -910,8 +910,8 @@ export default function AwardDetailPage({
                 <p className="text-xs font-medium text-muted-foreground uppercase tracking-wider">Evaluated</p>
                 <p className="text-2xl font-bold tabular-nums">{(award as any).totalAssessed ?? award._count.eligibilities}</p>
               </div>
-              <div className="flex h-10 w-10 items-center justify-center rounded-full bg-blue-100 dark:bg-blue-950/40">
-                <ListChecks className="h-5 w-5 text-blue-600 dark:text-blue-400" />
+              <div className="flex h-10 w-10 items-center justify-center rounded-full bg-blue-100">
+                <ListChecks className="h-5 w-5 text-blue-600" />
               </div>
             </div>
           </CardContent>
@@ -923,8 +923,8 @@ export default function AwardDetailPage({
                 <p className="text-xs font-medium text-muted-foreground uppercase tracking-wider">Jurors</p>
                 <p className="text-2xl font-bold tabular-nums">{award._count.jurors}</p>
               </div>
-              <div className="flex h-10 w-10 items-center justify-center rounded-full bg-violet-100 dark:bg-violet-950/40">
-                <Users className="h-5 w-5 text-violet-600 dark:text-violet-400" />
+              <div className="flex h-10 w-10 items-center justify-center rounded-full bg-violet-100">
+                <Users className="h-5 w-5 text-violet-600" />
               </div>
             </div>
           </CardContent>
@@ -936,8 +936,8 @@ export default function AwardDetailPage({
                 <p className="text-xs font-medium text-muted-foreground uppercase tracking-wider">Votes</p>
                 <p className="text-2xl font-bold tabular-nums">{award._count.votes}</p>
               </div>
-              <div className="flex h-10 w-10 items-center justify-center rounded-full bg-amber-100 dark:bg-amber-950/40">
-                <Vote className="h-5 w-5 text-amber-600 dark:text-amber-400" />
+              <div className="flex h-10 w-10 items-center justify-center rounded-full bg-amber-100">
+                <Vote className="h-5 w-5 text-amber-600" />
               </div>
             </div>
           </CardContent>
@@ -1612,7 +1612,7 @@ export default function AwardDetailPage({
         {/* Rounds Tab */}
         <TabsContent value="rounds" className="space-y-4">
           {award.eligibilityMode !== 'SEPARATE_POOL' && (
-            <div className="flex items-start gap-2 rounded-md border border-blue-200 bg-blue-50 p-3 text-blue-800 dark:border-blue-800 dark:bg-blue-950/30 dark:text-blue-300">
+            <div className="flex items-start gap-2 rounded-md border border-blue-200 bg-blue-50 p-3 text-blue-800">
               <Info className="h-4 w-4 mt-0.5 shrink-0" />
               <p className="text-sm">
                 Rounds are used in <strong>Separate Pool</strong> mode to create a dedicated evaluation track for shortlisted projects.
@@ -1620,7 +1620,7 @@ export default function AwardDetailPage({
             </div>
           )}
           {!award.competitionId && (
-            <div className="flex items-start gap-2 rounded-md border border-amber-200 bg-amber-50 p-3 text-amber-800 dark:border-amber-800 dark:bg-amber-950/30 dark:text-amber-300">
+            <div className="flex items-start gap-2 rounded-md border border-amber-200 bg-amber-50 p-3 text-amber-800">
               <AlertCircle className="h-4 w-4 mt-0.5 shrink-0" />
               <p className="text-sm">
                 Link this award to a competition first before creating rounds.
@@ -1750,16 +1750,16 @@ export default function AwardDetailPage({
                         return (
                           <TableRow
                             key={r.project.id}
-                            className={isWinner ? 'bg-amber-50/80 dark:bg-amber-950/20' : ''}
+                            className={isWinner ? 'bg-amber-50/80' : ''}
                           >
                             <TableCell>
                               <span className={`inline-flex h-7 w-7 items-center justify-center rounded-full text-xs font-bold ${
                                 i === 0
-                                  ? 'bg-amber-100 text-amber-800 dark:bg-amber-900/40 dark:text-amber-300'
+                                  ? 'bg-amber-100 text-amber-800'
                                   : i === 1
-                                    ? 'bg-slate-200 text-slate-700 dark:bg-slate-700 dark:text-slate-300'
+                                    ? 'bg-slate-200 text-slate-700'
                                     : i === 2
-                                      ? 'bg-orange-100 text-orange-800 dark:bg-orange-900/40 dark:text-orange-300'
+                                      ? 'bg-orange-100 text-orange-800'
                                       : 'text-muted-foreground'
                               }`}>
                                 {i + 1}

src/app/(admin)/admin/members/[id]/page.tsx

@@ -1047,7 +1047,7 @@ export default function MemberDetailPage() {
               />
             </div>
 
-            <div className="flex items-center justify-between gap-2 rounded-md border border-amber-200 bg-amber-50 px-3 py-2 text-xs text-amber-900 dark:border-amber-900 dark:bg-amber-950/30 dark:text-amber-100">
+            <div className="flex items-center justify-between gap-2 rounded-md border border-amber-200 bg-amber-50 px-3 py-2 text-xs text-amber-900">
               <div className="flex items-center gap-2">
                 <Clock className="h-3.5 w-3.5 shrink-0" />
                 <span>

src/app/(admin)/admin/members/invite/page.tsx

@@ -907,7 +907,7 @@ export default function MemberInvitePage() {
               </div>
 
               {!sendInvitation && (
-                <div className="flex items-start gap-3 rounded-lg bg-blue-500/10 p-4 text-blue-700 dark:text-blue-400">
+                <div className="flex items-start gap-3 rounded-lg bg-blue-500/10 p-4 text-blue-700">
                   <MailX className="h-5 w-5 shrink-0 mt-0.5" />
                   <div>
                     <p className="font-medium">No invitations will be sent</p>

src/app/(admin)/admin/projects/bulk-upload/page.tsx

@@ -462,7 +462,7 @@ export default function BulkUploadPage() {
                         return (
                           <TableRow
                             key={row.project.id}
-                            className={row.isComplete ? 'bg-green-50/50 dark:bg-green-950/10' : ''}
+                            className={row.isComplete ? 'bg-green-50/50' : ''}
                           >
                             <TableCell>
                               <Link

src/app/(admin)/admin/projects/new/page.tsx

@@ -53,15 +53,15 @@ type TeamMemberEntry = {
 }
 
 const ROLE_COLORS: Record<string, string> = {
-  LEAD: 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400',
-  MEMBER: 'bg-teal-100 text-teal-700 dark:bg-teal-900/30 dark:text-teal-400',
-  ADVISOR: 'bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-400',
+  LEAD: 'bg-red-100 text-red-700',
+  MEMBER: 'bg-teal-100 text-teal-700',
+  ADVISOR: 'bg-blue-100 text-blue-700',
 }
 
 const ROLE_AVATAR_COLORS: Record<string, string> = {
-  LEAD: 'bg-red-100 text-red-700 dark:bg-red-900/40 dark:text-red-300',
-  MEMBER: 'bg-teal-100 text-teal-700 dark:bg-teal-900/40 dark:text-teal-300',
-  ADVISOR: 'bg-blue-100 text-blue-700 dark:bg-blue-900/40 dark:text-blue-300',
+  LEAD: 'bg-red-100 text-red-700',
+  MEMBER: 'bg-teal-100 text-teal-700',
+  ADVISOR: 'bg-blue-100 text-blue-700',
 }
 
 const ROLE_LABELS: Record<string, string> = {

src/app/(admin)/admin/projects/page.tsx

@@ -679,7 +679,7 @@ export default function ProjectsPage() {
           <Button
             variant="outline"
             onClick={() => setAiTagDialogOpen(true)}
-            className={taggingInProgress ? 'border-amber-400 bg-amber-50 dark:bg-amber-950/20' : ''}
+            className={taggingInProgress ? 'border-amber-400 bg-amber-50' : ''}
           >
             {taggingInProgress ? (
               <Loader2 className="mr-2 h-4 w-4 animate-spin text-amber-600" />
@@ -1716,15 +1716,15 @@ export default function ProjectsPage() {
           <div className="space-y-6 py-4">
             {/* Progress Indicator (when running) */}
             {taggingInProgress && (
-              <div className="p-4 rounded-lg bg-blue-50 dark:bg-blue-950/20 border border-blue-200 dark:border-blue-900">
+              <div className="p-4 rounded-lg bg-blue-50 border border-blue-200">
                 <div className="space-y-3">
                   <div className="flex items-center gap-3">
                     <Loader2 className="h-5 w-5 animate-spin text-blue-600" />
                     <div className="flex-1">
-                      <p className="font-medium text-blue-900 dark:text-blue-100">
+                      <p className="font-medium text-blue-900">
                         AI Tagging in Progress
                       </p>
-                      <p className="text-sm text-blue-700 dark:text-blue-300">
+                      <p className="text-sm text-blue-700">
                         {jobStatus?.status === 'PENDING'
                           ? 'Initializing...'
                           : `Processing ${jobStatus?.totalProjects || 0} projects with AI...`}
@@ -1739,12 +1739,12 @@ export default function ProjectsPage() {
                   </div>
                   <div className="space-y-1">
                     <div className="flex justify-between text-sm">
-                      <span className="text-blue-700 dark:text-blue-300">
+                      <span className="text-blue-700">
                         {jobStatus?.processedCount || 0} of {jobStatus?.totalProjects || '?'} projects processed
                         {jobStatus?.taggedCount ? ` (${jobStatus.taggedCount} tagged)` : ''}
                       </span>
                       {jobStatus && jobStatus.totalProjects > 0 && (
-                        <span className="font-medium text-blue-900 dark:text-blue-100">
+                        <span className="font-medium text-blue-900">
                           {taggingProgressPercent}%
                         </span>
                       )}
@@ -1767,9 +1767,9 @@ export default function ProjectsPage() {
             {taggingResult && !taggingInProgress && (
               <div className={`p-4 rounded-lg border ${
                 taggingResult.failed > 0
-                  ? 'bg-amber-50 dark:bg-amber-950/20 border-amber-200 dark:border-amber-900'
+                  ? 'bg-amber-50 border-amber-200'
                   : taggingResult.processed > 0
-                    ? 'bg-green-50 dark:bg-green-950/20 border-green-200 dark:border-green-900'
+                    ? 'bg-green-50 border-green-200'
                     : 'bg-muted border-border'
               }`}>
                 <div className="flex items-center gap-3 mb-3">
@@ -1804,12 +1804,12 @@ export default function ProjectsPage() {
                 </div>
                 {taggingResult.errors.length > 0 && (
                   <div className="mt-3 space-y-2">
-                    <p className="text-sm font-medium text-amber-700 dark:text-amber-300">
+                    <p className="text-sm font-medium text-amber-700">
                       {taggingResult.errors.length} project{taggingResult.errors.length > 1 ? 's' : ''} failed:
                     </p>
                     <div className="max-h-32 overflow-y-auto rounded bg-background/50 p-2 text-xs space-y-1">
                       {taggingResult.errors.map((error, i) => (
-                        <p key={i} className="text-amber-700 dark:text-amber-300">
+                        <p key={i} className="text-amber-700">
                           • {error}
                         </p>
                       ))}

src/app/(admin)/admin/reports/page.tsx

@@ -52,6 +52,7 @@ import {
 } from 'lucide-react'
 import { toast } from 'sonner'
 import { formatDateOnly } from '@/lib/utils'
+import { getCountryName, getCountryFlag } from '@/lib/countries'
 import {
   ScoreDistributionChart,
   EvaluationTimelineChart,
@@ -91,6 +92,17 @@ function ReportsOverview({ scope }: { scope: string | null }) {
       { enabled: hasScope }
     )
 
+  // Applicant nationality breakdown — always runs (scope optional;
+  // empty scope = global view across all programs).
+  const { data: nationalityStats, isLoading: nationalityLoading } =
+    trpc.analytics.getApplicantNationalities.useQuery(scopeInput)
+
+  const nationalityScopeLabel = scopeInput.roundId
+    ? 'in this round'
+    : scopeInput.programId
+      ? `in ${programs?.find((p) => p.id === scopeInput.programId)?.year ?? ''} Edition`
+      : 'across all programs'
+
   if (isLoading || statsLoading) {
     return (
       <div className="space-y-6">
@@ -198,6 +210,13 @@ function ReportsOverview({ scope }: { scope: string | null }) {
         </AnimatedCard>
       </div>
 
+      {/* Applicant Nationalities */}
+      <ApplicantNationalitiesCard
+        data={nationalityStats}
+        loading={nationalityLoading}
+        scopeLabel={nationalityScopeLabel}
+      />
+
       {/* Score Distribution (if any evaluations exist) */}
       {dashStats?.scoreDistribution && dashStats.scoreDistribution.some(b => b.count > 0) && (
         <Card>
@@ -500,6 +519,140 @@ function ReportsOverview({ scope }: { scope: string | null }) {
   )
 }
 
+type NationalityStats = {
+  total: number
+  declared: number
+  notDeclared: number
+  byCountry: Array<{ country: string; count: number }>
+}
+
+function ApplicantNationalitiesCard({
+  data,
+  loading,
+  scopeLabel,
+}: {
+  data: NationalityStats | undefined
+  loading: boolean
+  scopeLabel: string
+}) {
+  const [showAll, setShowAll] = useState(false)
+
+  return (
+    <Card>
+      <CardHeader>
+        <CardTitle className="flex items-center gap-2">
+          <div className="rounded-lg bg-violet-500/10 p-1.5">
+            <Globe className="h-4 w-4 text-violet-600" />
+          </div>
+          Applicant Nationalities
+        </CardTitle>
+        <CardDescription>
+          Self-declared nationality of team members on projects {scopeLabel}.
+        </CardDescription>
+      </CardHeader>
+      <CardContent>
+        {loading ? (
+          <div className="space-y-3">
+            <Skeleton className="h-12 w-full" />
+            <Skeleton className="h-64 w-full" />
+          </div>
+        ) : !data || data.total === 0 ? (
+          <div className="flex flex-col items-center justify-center py-8 text-center">
+            <Globe className="h-10 w-10 text-muted-foreground/50" />
+            <p className="mt-2 text-sm text-muted-foreground">
+              No applicants in this scope.
+            </p>
+          </div>
+        ) : data.declared === 0 ? (
+          <>
+            <NationalitySummary declared={data.declared} notDeclared={data.notDeclared} />
+            <div className="mt-4 flex flex-col items-center justify-center rounded-lg border border-dashed py-8 text-center">
+              <Globe className="h-8 w-8 text-muted-foreground/50" />
+              <p className="mt-2 text-sm text-muted-foreground">
+                No nationality data yet.
+              </p>
+            </div>
+          </>
+        ) : (
+          <>
+            <NationalitySummary declared={data.declared} notDeclared={data.notDeclared} />
+
+            <div className="mt-4 rounded-lg border">
+              <Table>
+                <TableHeader>
+                  <TableRow>
+                    <TableHead>Country</TableHead>
+                    <TableHead className="text-right w-32">Applicants</TableHead>
+                  </TableRow>
+                </TableHeader>
+                <TableBody>
+                  {(showAll ? data.byCountry : data.byCountry.slice(0, 10)).map((row) => {
+                    const name = getCountryName(row.country)
+                    const flag = getCountryFlag(row.country)
+                    return (
+                      <TableRow key={row.country}>
+                        <TableCell className="font-medium">
+                          <span className="inline-flex items-center gap-2">
+                            {flag && <span aria-hidden>{flag}</span>}
+                            <span>{name}</span>
+                            {name !== row.country && (
+                              <span className="text-xs text-muted-foreground tabular-nums">
+                                {row.country}
+                              </span>
+                            )}
+                          </span>
+                        </TableCell>
+                        <TableCell className="text-right">
+                          <Badge variant="secondary" className="tabular-nums">
+                            {row.count}
+                          </Badge>
+                        </TableCell>
+                      </TableRow>
+                    )
+                  })}
+                </TableBody>
+              </Table>
+            </div>
+
+            {data.byCountry.length > 10 && (
+              <div className="mt-3 flex justify-end">
+                <Button
+                  variant="ghost"
+                  size="sm"
+                  onClick={() => setShowAll((v) => !v)}
+                  className="gap-1 text-muted-foreground"
+                >
+                  {showAll
+                    ? 'Show top 10'
+                    : `Show all (${data.byCountry.length} countries)`}
+                  <ArrowRight className="h-3.5 w-3.5" />
+                </Button>
+              </div>
+            )}
+          </>
+        )}
+      </CardContent>
+    </Card>
+  )
+}
+
+function NationalitySummary({ declared, notDeclared }: { declared: number; notDeclared: number }) {
+  return (
+    <div className="grid grid-cols-2 gap-3">
+      <div className="rounded-lg border p-3 text-center">
+        <p className="text-xs text-muted-foreground">Declared</p>
+        <p className="text-2xl font-bold tabular-nums">{declared}</p>
+      </div>
+      <div className="rounded-lg border p-3 text-center">
+        <p className="text-xs text-muted-foreground">Not declared</p>
+        <p className="text-2xl font-bold tabular-nums text-muted-foreground">
+          {notDeclared}
+        </p>
+      </div>
+    </div>
+  )
+}
+
 // Parse selection value: "all:programId" for edition-wide, or roundId
 function parseSelection(value: string | null): { roundId?: string; programId?: string } {
   if (!value) return {}

src/app/(admin)/admin/rounds/[roundId]/jurors/[userId]/evaluate/[projectId]/page.tsx

@@ -394,7 +394,7 @@ export default function AdminProxyEvaluatePage({ params: paramsPromise }: PagePr
           </Link>
         </Button>
         <div>
-          <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+          <h1 className="text-2xl font-bold tracking-tight text-brand-blue">
             {isReadOnly ? 'Submitted Evaluation' : 'Fill In Evaluation'}
           </h1>
           <div className="flex items-center gap-2 mt-1 flex-wrap">
@@ -404,8 +404,8 @@ export default function AdminProxyEvaluatePage({ params: paramsPromise }: PagePr
                 variant="secondary"
                 className={
                   project.competitionCategory === 'STARTUP'
-                    ? 'bg-violet-100 text-violet-700 border-violet-200 dark:bg-violet-950 dark:text-violet-300'
-                    : 'bg-sky-100 text-sky-700 border-sky-200 dark:bg-sky-950 dark:text-sky-300'
+                    ? 'bg-violet-100 text-violet-700 border-violet-200'
+                    : 'bg-sky-100 text-sky-700 border-sky-200'
                 }
               >
                 {project.competitionCategory === 'STARTUP' ? 'Startup' : 'Business Concept'}
@@ -415,7 +415,7 @@ export default function AdminProxyEvaluatePage({ params: paramsPromise }: PagePr
         </div>
       </div>
 
-      <Card className="border-l-4 border-l-amber-500 bg-amber-50/40 dark:bg-amber-950/10">
+      <Card className="border-l-4 border-l-amber-500 bg-amber-50/40">
         <CardContent className="flex items-start gap-3 p-4">
           <UserCheck className="h-5 w-5 text-amber-600 shrink-0 mt-0.5" />
           <div className="flex-1 text-sm">
@@ -431,7 +431,7 @@ export default function AdminProxyEvaluatePage({ params: paramsPromise }: PagePr
       </Card>
 
       {isReadOnly && (
-        <Card className="border-l-4 border-l-blue-500 bg-blue-50/50 dark:bg-blue-950/20">
+        <Card className="border-l-4 border-l-blue-500 bg-blue-50/50">
           <CardContent className="flex items-start gap-3 p-4">
             <Lock className="h-5 w-5 text-blue-600 shrink-0 mt-0.5" />
             <div className="flex-1">
@@ -446,7 +446,7 @@ export default function AdminProxyEvaluatePage({ params: paramsPromise }: PagePr
       )}
 
       {hasCOI && !isReadOnly && (
-        <Card className="border-l-4 border-l-red-500 bg-red-50/40 dark:bg-red-950/10">
+        <Card className="border-l-4 border-l-red-500 bg-red-50/40">
           <CardContent className="flex items-start gap-3 p-4">
             <Lock className="h-5 w-5 text-red-600 shrink-0 mt-0.5" />
             <div className="flex-1 text-sm">

src/app/(admin)/admin/rounds/[roundId]/jurors/[userId]/evaluate/page.tsx

@@ -55,7 +55,7 @@ export default function AdminJurorProxyEvaluatePage({ params: paramsPromise }: P
           </Link>
         </Button>
         <div>
-          <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+          <h1 className="text-2xl font-bold tracking-tight text-brand-blue">
             Proxy Evaluations
           </h1>
           <p className="text-muted-foreground mt-1">
@@ -205,8 +205,8 @@ function AssignmentRow({ roundId, userId, assignment, mode }: AssignmentRowProps
               className={cn(
                 'shrink-0',
                 project.competitionCategory === 'STARTUP'
-                  ? 'bg-violet-100 text-violet-700 border-violet-200 dark:bg-violet-950 dark:text-violet-300'
-                  : 'bg-sky-100 text-sky-700 border-sky-200 dark:bg-sky-950 dark:text-sky-300',
+                  ? 'bg-violet-100 text-violet-700 border-violet-200'
+                  : 'bg-sky-100 text-sky-700 border-sky-200',
               )}
             >
               {project.competitionCategory === 'STARTUP' ? 'Startup' : 'Business Concept'}

src/app/(admin)/admin/rounds/[roundId]/page.tsx

@@ -2074,39 +2074,39 @@ export default function RoundDetailPage() {
                       </p>
                     )}
                     {aiAssignmentMutation.isPending && (
-                      <div className="flex items-center gap-3 p-3 rounded-lg bg-violet-50 border border-violet-200 dark:bg-violet-950/20 dark:border-violet-800">
+                      <div className="flex items-center gap-3 p-3 rounded-lg bg-violet-50 border border-violet-200">
                         <div className="relative">
                           <div className="h-8 w-8 rounded-full border-2 border-violet-300 border-t-violet-600 animate-spin" />
                         </div>
                         <div>
-                          <p className="text-sm font-medium text-violet-800 dark:text-violet-200">AI is analyzing projects and jurors...</p>
-                          <p className="text-xs text-violet-600 dark:text-violet-400">
+                          <p className="text-sm font-medium text-violet-800">AI is analyzing projects and jurors...</p>
+                          <p className="text-xs text-violet-600">
                             Matching expertise, reviewing bios, and balancing workloads
                           </p>
                         </div>
                       </div>
                     )}
                     {aiAssignmentMutation.error && !aiAssignmentMutation.isPending && (
-                      <div className="flex items-center gap-3 p-3 rounded-lg bg-red-50 border border-red-200 dark:bg-red-950/20 dark:border-red-800">
+                      <div className="flex items-center gap-3 p-3 rounded-lg bg-red-50 border border-red-200">
                         <AlertTriangle className="h-5 w-5 text-red-600 shrink-0" />
                         <div className="flex-1">
-                          <p className="text-sm font-medium text-red-800 dark:text-red-200">
+                          <p className="text-sm font-medium text-red-800">
                             AI generation failed
                           </p>
-                          <p className="text-xs text-red-600 dark:text-red-400">
+                          <p className="text-xs text-red-600">
                             {aiAssignmentMutation.error.message}
                           </p>
                         </div>
                       </div>
                     )}
                     {aiAssignmentMutation.data && !aiAssignmentMutation.isPending && (
-                      <div className="flex items-center gap-3 p-3 rounded-lg bg-emerald-50 border border-emerald-200 dark:bg-emerald-950/20 dark:border-emerald-800">
+                      <div className="flex items-center gap-3 p-3 rounded-lg bg-emerald-50 border border-emerald-200">
                         <CheckCircle2 className="h-5 w-5 text-emerald-600 shrink-0" />
                         <div className="flex-1">
-                          <p className="text-sm font-medium text-emerald-800 dark:text-emerald-200">
+                          <p className="text-sm font-medium text-emerald-800">
                             {aiAssignmentMutation.data.stats.assignmentsGenerated} assignments generated
                           </p>
-                          <p className="text-xs text-emerald-600 dark:text-emerald-400">
+                          <p className="text-xs text-emerald-600">
                             {aiAssignmentMutation.data.stats.totalJurors} jurors, {aiAssignmentMutation.data.stats.totalProjects} projects
                             {aiAssignmentMutation.data.fallbackUsed && ' (algorithm fallback)'}
                           </p>
@@ -2588,9 +2588,9 @@ export default function RoundDetailPage() {
 
       {/* Autosave error bar — only shows when save fails */}
       {autosaveStatus === 'error' && (
-        <div className="fixed bottom-0 left-0 right-0 z-50 border-t bg-red-50 dark:bg-red-950/50 shadow-[0_-4px_12px_rgba(0,0,0,0.1)]">
+        <div className="fixed bottom-0 left-0 right-0 z-50 border-t bg-red-50 shadow-[0_-4px_12px_rgba(0,0,0,0.1)]">
           <div className="container flex items-center justify-between py-3 px-4 max-w-5xl mx-auto">
-            <div className="flex items-center gap-2 text-sm text-red-700 dark:text-red-300">
+            <div className="flex items-center gap-2 text-sm text-red-700">
               <AlertTriangle className="h-4 w-4" />
               <span>Auto-save failed</span>
             </div>

src/app/(applicant)/applicant/mentor/page.tsx

@@ -1,147 +1,230 @@
-'use client'
-
-import { useSession } from 'next-auth/react'
-import { trpc } from '@/lib/trpc/client'
-import {
-  Card,
-  CardContent,
-  CardDescription,
-  CardHeader,
-  CardTitle,
-} from '@/components/ui/card'
-import { Skeleton } from '@/components/ui/skeleton'
-import { MentorChat } from '@/components/shared/mentor-chat'
-import { WorkspaceFilesPanel } from '@/components/mentor/workspace-files-panel'
-import {
-  MessageSquare,
-  UserCircle,
-  FileText,
-} from 'lucide-react'
-
-export default function ApplicantMentorPage() {
-  const { data: session, status: sessionStatus } = useSession()
-  const isAuthenticated = sessionStatus === 'authenticated'
-
-  const { data: dashboardData, isLoading: dashLoading } = trpc.applicant.getMyDashboard.useQuery(
-    undefined,
-    { enabled: isAuthenticated }
-  )
-
-  const projectId = dashboardData?.project?.id
-
-  const { data: mentorMessages, isLoading: messagesLoading } = trpc.applicant.getMentorMessages.useQuery(
-    { projectId: projectId! },
-    { enabled: !!projectId }
-  )
-
-  const utils = trpc.useUtils()
-  const sendMessage = trpc.applicant.sendMentorMessage.useMutation({
-    onSuccess: () => {
-      utils.applicant.getMentorMessages.invalidate({ projectId: projectId! })
-    },
-  })
-
-  if (dashLoading) {
-    return (
-      <div className="space-y-6">
-        <div className="space-y-2">
-          <Skeleton className="h-8 w-48" />
-          <Skeleton className="h-4 w-64" />
-        </div>
-        <Skeleton className="h-96 w-full" />
-      </div>
-    )
-  }
-
-  if (!projectId) {
-    return (
-      <div className="space-y-6">
-        <div>
-          <h1 className="text-2xl font-semibold tracking-tight">Mentor</h1>
-        </div>
-        <Card>
-          <CardContent className="flex flex-col items-center justify-center py-12">
-            <FileText className="h-12 w-12 text-muted-foreground/50 mb-4" />
-            <h2 className="text-xl font-semibold mb-2">No Project</h2>
-            <p className="text-muted-foreground text-center">
-              Submit a project first to communicate with your mentor.
-            </p>
-          </CardContent>
-        </Card>
-      </div>
-    )
-  }
-
-  const mentor = dashboardData?.project?.mentorAssignment?.mentor
-
-  return (
-    <div className="space-y-6">
-      {/* Header */}
-      <div>
-        <h1 className="text-2xl font-semibold tracking-tight flex items-center gap-2">
-          <MessageSquare className="h-6 w-6" />
-          Mentor Communication
-        </h1>
-        <p className="text-muted-foreground">
-          Chat with your assigned mentor
-        </p>
-      </div>
-
-      {/* Mentor info */}
-      {mentor ? (
-        <Card className="bg-muted/50">
-          <CardContent className="p-4">
-            <div className="flex items-center gap-3">
-              <UserCircle className="h-10 w-10 text-muted-foreground" />
-              <div>
-                <p className="font-medium">{mentor.name || 'Mentor'}</p>
-                <p className="text-sm text-muted-foreground">{mentor.email}</p>
-              </div>
-            </div>
-          </CardContent>
-        </Card>
-      ) : (
-        <Card className="bg-muted/50">
-          <CardContent className="flex flex-col items-center justify-center py-8">
-            <UserCircle className="h-12 w-12 text-muted-foreground/50 mb-3" />
-            <p className="text-muted-foreground text-center">
-              No mentor has been assigned to your project yet.
-              You&apos;ll be notified when a mentor is assigned.
-            </p>
-          </CardContent>
-        </Card>
-      )}
-
-      {/* Chat */}
-      {mentor && (
-        <Card>
-          <CardHeader>
-            <CardTitle>Messages</CardTitle>
-            <CardDescription>
-              Your conversation history with {mentor.name || 'your mentor'}
-            </CardDescription>
-          </CardHeader>
-          <CardContent>
-            <MentorChat
-              messages={mentorMessages || []}
-              currentUserId={session?.user?.id || ''}
-              onSendMessage={async (message) => {
-                await sendMessage.mutateAsync({ projectId: projectId!, message })
-              }}
-              isLoading={messagesLoading}
-              isSending={sendMessage.isPending}
-            />
-          </CardContent>
-        </Card>
-      )}
-
-      {/* Files */}
-      {dashboardData?.project?.mentorAssignment?.id && (
-        <WorkspaceFilesPanel
-          mentorAssignmentId={dashboardData.project.mentorAssignment.id}
-          asApplicant
-        />
-      )}
-    </div>
-  )
-}
+'use client'
+
+import { useState } from 'react'
+import { useSession } from 'next-auth/react'
+import { format } from 'date-fns'
+import { trpc } from '@/lib/trpc/client'
+import {
+  Card,
+  CardContent,
+  CardDescription,
+  CardHeader,
+  CardTitle,
+} from '@/components/ui/card'
+import { Badge } from '@/components/ui/badge'
+import { Button } from '@/components/ui/button'
+import { Skeleton } from '@/components/ui/skeleton'
+import { MentorChat } from '@/components/shared/mentor-chat'
+import { WorkspaceFilesPanel } from '@/components/mentor/workspace-files-panel'
+import { RequestChangeDialog } from './request-change-dialog'
+import {
+  MessageSquare,
+  UserCircle,
+  FileText,
+  UserCog,
+} from 'lucide-react'
+
+export default function ApplicantMentorPage() {
+  const { data: session, status: sessionStatus } = useSession()
+  const isAuthenticated = sessionStatus === 'authenticated'
+
+  const { data: dashboardData, isLoading: dashLoading } = trpc.applicant.getMyDashboard.useQuery(
+    undefined,
+    { enabled: isAuthenticated }
+  )
+
+  const projectId = dashboardData?.project?.id
+
+  const { data: mentorMessages, isLoading: messagesLoading } = trpc.applicant.getMentorMessages.useQuery(
+    { projectId: projectId! },
+    { enabled: !!projectId }
+  )
+
+  const utils = trpc.useUtils()
+  const sendMessage = trpc.applicant.sendMentorMessage.useMutation({
+    onSuccess: () => {
+      utils.applicant.getMentorMessages.invalidate({ projectId: projectId! })
+    },
+  })
+
+  const [isChangeOpen, setIsChangeOpen] = useState(false)
+
+  if (dashLoading) {
+    return (
+      <div className="space-y-6">
+        <div className="space-y-2">
+          <Skeleton className="h-8 w-48" />
+          <Skeleton className="h-4 w-64" />
+        </div>
+        <Skeleton className="h-96 w-full" />
+      </div>
+    )
+  }
+
+  if (!projectId) {
+    return (
+      <div className="space-y-6">
+        <div>
+          <h1 className="text-2xl font-semibold tracking-tight">Mentor</h1>
+        </div>
+        <Card>
+          <CardContent className="flex flex-col items-center justify-center py-12">
+            <FileText className="h-12 w-12 text-muted-foreground/50 mb-4" />
+            <h2 className="text-xl font-semibold mb-2">No Project</h2>
+            <p className="text-muted-foreground text-center">
+              Submit a project first to communicate with your mentor.
+            </p>
+          </CardContent>
+        </Card>
+      </div>
+    )
+  }
+
+  const assignments = dashboardData?.project?.mentorAssignments ?? []
+  const hasMentors = assignments.length > 0
+  const primaryAssignment = assignments[0] ?? null
+  const primaryMentor = primaryAssignment?.mentor
+  const hasPendingChangeRequest = !!dashboardData?.hasPendingMentorChangeRequest
+
+  const dialogMentors = assignments
+    .filter((a) => !!a.mentor)
+    .map((a) => ({
+      assignmentId: a.id,
+      name: a.mentor?.name || a.mentor?.email || 'Mentor',
+    }))
+
+  const teamHeading = assignments.length > 1 ? 'Your mentor team' : 'Your mentor'
+
+  return (
+    <div className="space-y-6">
+      {/* Header */}
+      <div>
+        <h1 className="text-2xl font-semibold tracking-tight flex items-center gap-2">
+          <MessageSquare className="h-6 w-6" />
+          Mentor Communication
+        </h1>
+        <p className="text-muted-foreground">
+          {assignments.length > 1
+            ? 'Chat with your assigned mentor team'
+            : 'Chat with your assigned mentor'}
+        </p>
+      </div>
+
+      {/* Mentor list */}
+      {hasMentors ? (
+        <section className="space-y-3">
+          <h2 className="text-lg font-semibold tracking-tight">{teamHeading}</h2>
+          <div className="grid gap-3 md:grid-cols-2">
+            {assignments.map((assignment) => {
+              const mentor = assignment.mentor
+              if (!mentor) return null
+              const expertise = mentor.expertiseTags ?? []
+              return (
+                <Card key={assignment.id} className="bg-muted/50">
+                  <CardContent className="p-4 space-y-3">
+                    <div className="flex items-start gap-3">
+                      <UserCircle className="h-10 w-10 text-muted-foreground shrink-0" />
+                      <div className="min-w-0 flex-1">
+                        <p className="font-medium truncate">
+                          {mentor.name || 'Mentor'}
+                        </p>
+                        <p className="text-sm text-muted-foreground truncate">
+                          {mentor.email}
+                        </p>
+                        {assignment.assignedAt && (
+                          <p className="text-xs text-muted-foreground mt-1">
+                            Assigned since {format(new Date(assignment.assignedAt), 'MMM d, yyyy')}
+                          </p>
+                        )}
+                      </div>
+                    </div>
+                    {expertise.length > 0 && (
+                      <div className="flex flex-wrap gap-1.5">
+                        {expertise.map((tag) => (
+                          <Badge key={tag} variant="secondary" className="font-normal">
+                            {tag}
+                          </Badge>
+                        ))}
+                      </div>
+                    )}
+                  </CardContent>
+                </Card>
+              )
+            })}
+          </div>
+
+          {/* Request change action */}
+          <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-2 pt-1">
+            <p className="text-sm text-muted-foreground">
+              {hasPendingChangeRequest
+                ? "You have a pending mentor change request — admins will follow up soon."
+                : 'Need a different match? Let the program admins know.'}
+            </p>
+            <Button
+              variant="outline"
+              onClick={() => setIsChangeOpen(true)}
+              disabled={hasPendingChangeRequest}
+            >
+              <UserCog className="mr-2 h-4 w-4" />
+              {hasPendingChangeRequest ? 'Change requested' : 'Request a mentor change'}
+            </Button>
+          </div>
+        </section>
+      ) : (
+        <Card className="bg-muted/50">
+          <CardContent className="flex flex-col items-center justify-center py-8">
+            <UserCircle className="h-12 w-12 text-muted-foreground/50 mb-3" />
+            <p className="text-muted-foreground text-center">
+              No mentor has been assigned to your project yet.
+              You&apos;ll be notified when a mentor is assigned.
+            </p>
+          </CardContent>
+        </Card>
+      )}
+
+      {/* Chat */}
+      {primaryMentor && (
+        <Card>
+          <CardHeader>
+            <CardTitle>Messages</CardTitle>
+            <CardDescription>
+              {assignments.length > 1
+                ? 'Your conversation history with your mentor team'
+                : `Your conversation history with ${primaryMentor.name || 'your mentor'}`}
+            </CardDescription>
+          </CardHeader>
+          <CardContent>
+            <MentorChat
+              messages={mentorMessages || []}
+              currentUserId={session?.user?.id || ''}
+              onSendMessage={async (message) => {
+                await sendMessage.mutateAsync({ projectId: projectId!, message })
+              }}
+              isLoading={messagesLoading}
+              isSending={sendMessage.isPending}
+            />
+          </CardContent>
+        </Card>
+      )}
+
+      {/* Files */}
+      {primaryAssignment?.id && projectId && (
+        <WorkspaceFilesPanel
+          projectId={projectId}
+          mentorAssignmentId={primaryAssignment.id}
+          asApplicant
+        />
+      )}
+
+      {/* Request change dialog */}
+      {projectId && (
+        <RequestChangeDialog
+          projectId={projectId}
+          mentors={dialogMentors}
+          open={isChangeOpen}
+          onOpenChange={setIsChangeOpen}
+        />
+      )}
+    </div>
+  )
+}

src/app/(applicant)/applicant/mentor/request-change-dialog.tsx

@@ -0,0 +1,179 @@
+'use client'
+
+import { useEffect, useState } from 'react'
+import { toast } from 'sonner'
+import { Loader2 } from 'lucide-react'
+
+import { trpc } from '@/lib/trpc/client'
+import { Button } from '@/components/ui/button'
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog'
+import { Label } from '@/components/ui/label'
+import { Textarea } from '@/components/ui/textarea'
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from '@/components/ui/select'
+
+const REASON_MIN = 10
+const REASON_MAX = 2000
+const TARGET_ANY = '__any__'
+
+type MentorOption = {
+  assignmentId: string
+  name: string
+}
+
+type RequestChangeDialogProps = {
+  projectId: string
+  mentors: MentorOption[]
+  open: boolean
+  onOpenChange: (open: boolean) => void
+}
+
+export function RequestChangeDialog({
+  projectId,
+  mentors,
+  open,
+  onOpenChange,
+}: RequestChangeDialogProps) {
+  const [reason, setReason] = useState('')
+  const [target, setTarget] = useState<string>(TARGET_ANY)
+  const [touched, setTouched] = useState(false)
+
+  const utils = trpc.useUtils()
+  const requestChange = trpc.mentor.requestChange.useMutation({
+    onSuccess: async () => {
+      toast.success(
+        "Your request has been sent to the program admins. We'll review it and follow up.",
+      )
+      onOpenChange(false)
+      // Refresh dashboard so the disabled state for the button updates.
+      await utils.applicant.getMyDashboard.invalidate()
+    },
+    onError: (error) => {
+      toast.error(error.message || 'Could not send your request. Please try again.')
+    },
+  })
+
+  // Reset form when the dialog is closed.
+  useEffect(() => {
+    if (!open) {
+      setReason('')
+      setTarget(TARGET_ANY)
+      setTouched(false)
+    }
+  }, [open])
+
+  const trimmedReason = reason.trim()
+  const reasonTooShort = trimmedReason.length < REASON_MIN
+  const reasonTooLong = trimmedReason.length > REASON_MAX
+  const reasonInvalid = reasonTooShort || reasonTooLong
+  const showReasonError = touched && reasonInvalid
+
+  const handleSubmit = (e: React.FormEvent) => {
+    e.preventDefault()
+    setTouched(true)
+    if (reasonInvalid) return
+
+    requestChange.mutate({
+      projectId,
+      targetAssignmentId: target === TARGET_ANY ? undefined : target,
+      reason: trimmedReason,
+    })
+  }
+
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="sm:max-w-lg">
+        <DialogHeader>
+          <DialogTitle>Request a mentor change</DialogTitle>
+          <DialogDescription>
+            Share a few details so the program admins can follow up with you.
+            Your current mentor will not see this message.
+          </DialogDescription>
+        </DialogHeader>
+        <form onSubmit={handleSubmit} className="space-y-4">
+          {mentors.length > 0 && (
+            <div className="space-y-2">
+              <Label htmlFor="targetMentor">About a specific mentor</Label>
+              <Select value={target} onValueChange={setTarget}>
+                <SelectTrigger id="targetMentor">
+                  <SelectValue placeholder="Any / general" />
+                </SelectTrigger>
+                <SelectContent>
+                  <SelectItem value={TARGET_ANY}>Any / general</SelectItem>
+                  {mentors.map((m) => (
+                    <SelectItem key={m.assignmentId} value={m.assignmentId}>
+                      {m.name}
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+              <p className="text-xs text-muted-foreground">
+                Optional. Use this if your request is about one of your co-mentors in particular.
+              </p>
+            </div>
+          )}
+          <div className="space-y-2">
+            <Label htmlFor="reason">
+              Why would you like a change?
+            </Label>
+            <Textarea
+              id="reason"
+              value={reason}
+              onChange={(e) => setReason(e.target.value)}
+              onBlur={() => setTouched(true)}
+              placeholder="Tell us why you'd like a change. The admin team will follow up."
+              rows={6}
+              maxLength={REASON_MAX}
+              aria-invalid={showReasonError || undefined}
+              required
+            />
+            <div className="flex items-center justify-between text-xs">
+              {showReasonError ? (
+                <p className="text-destructive">
+                  {reasonTooShort
+                    ? `Please provide at least ${REASON_MIN} characters.`
+                    : `Please keep your message under ${REASON_MAX} characters.`}
+                </p>
+              ) : (
+                <p className="text-muted-foreground">
+                  {REASON_MIN}–{REASON_MAX} characters.
+                </p>
+              )}
+              <p className="text-muted-foreground tabular-nums">
+                {trimmedReason.length}/{REASON_MAX}
+              </p>
+            </div>
+          </div>
+          <DialogFooter>
+            <Button
+              type="button"
+              variant="outline"
+              onClick={() => onOpenChange(false)}
+              disabled={requestChange.isPending}
+            >
+              Cancel
+            </Button>
+            <Button type="submit" disabled={requestChange.isPending}>
+              {requestChange.isPending && (
+                <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+              )}
+              Send request
+            </Button>
+          </DialogFooter>
+        </form>
+      </DialogContent>
+    </Dialog>
+  )
+}

src/app/(applicant)/applicant/page.tsx

@@ -219,12 +219,12 @@ export default function ApplicantDashboardPage() {
               key={round.id}
               className={`flex flex-col sm:flex-row items-start sm:items-center gap-3 rounded-lg border px-4 py-3 ${
                 isUrgent
-                  ? 'border-amber-500/50 bg-amber-50 dark:bg-amber-950/20'
+                  ? 'border-amber-500/50 bg-amber-50'
                   : 'border-primary/20 bg-primary/5'
               }`}
             >
               <div className="flex items-center gap-2 min-w-0">
-                <Clock className={`h-4 w-4 shrink-0 ${isUrgent ? 'text-amber-600 dark:text-amber-400' : 'text-primary'}`} />
+                <Clock className={`h-4 w-4 shrink-0 ${isUrgent ? 'text-amber-600' : 'text-primary'}`} />
                 <span className="font-medium text-sm truncate">{round.name}</span>
                 <Badge variant={isUrgent ? 'warning' : 'default'} className="shrink-0">
                   {remaining > 0 ? formatCountdown(remaining) + ' left' : 'Closed'}

src/app/(applicant)/applicant/team/page.tsx

@@ -357,12 +357,12 @@ export default function ApplicantProjectPage() {
             )}
           </div>
 
-          {/* Mentor info */}
-          {project.mentorAssignment?.mentor && (
+          {/* Mentor info — TODO(PR8 Task 7): list ALL assigned mentors */}
+          {project.mentorAssignments?.[0]?.mentor && (
             <div className="rounded-lg border p-3 bg-muted/50">
               <p className="text-sm font-medium mb-1">Assigned Mentor</p>
               <p className="text-sm text-muted-foreground">
-                {project.mentorAssignment.mentor.name} ({project.mentorAssignment.mentor.email})
+                {project.mentorAssignments[0].mentor.name} ({project.mentorAssignments[0].mentor.email})
               </p>
             </div>
           )}

src/app/(jury)/jury/awards/[id]/page.tsx

@@ -427,10 +427,10 @@ function ProjectDetails({ project }: { project: ProjectData }) {
   return (
     <div className="px-4 pb-4 pt-2 space-y-4 border-t mt-2">
       {project.evaluationScore && (
-        <div className="flex items-center gap-2 rounded-md bg-blue-50/50 dark:bg-blue-950/20 px-3 py-2">
-          <Star className="h-4 w-4 text-blue-600 dark:text-blue-400 shrink-0" />
+        <div className="flex items-center gap-2 rounded-md bg-blue-50/50 px-3 py-2">
+          <Star className="h-4 w-4 text-blue-600 shrink-0" />
           <div className="text-sm">
-            <span className="font-semibold text-blue-700 dark:text-blue-300">
+            <span className="font-semibold text-blue-700">
               {project.evaluationScore.avg.toFixed(1)} / 10
             </span>
             <span className="text-muted-foreground ml-2">
@@ -518,7 +518,7 @@ function ProjectCard({
               isExpanded && 'rotate-180'
             )} />
             <div className="min-w-0">
-              <h3 className="font-semibold text-sm group-hover:text-brand-blue dark:group-hover:text-brand-teal transition-colors">
+              <h3 className="font-semibold text-sm group-hover:text-brand-blue transition-colors">
                 {project.title}
               </h3>
               <p className="text-xs text-muted-foreground mt-0.5">
@@ -587,7 +587,7 @@ function ChairPanel({
   const isClosed = award.status === 'CLOSED'
 
   return (
-    <Card className="border-amber-200 dark:border-amber-900">
+    <Card className="border-amber-200">
       <CardHeader>
         <div className="flex items-center gap-2">
           <Gavel className="h-5 w-5 text-amber-600" />

src/app/(jury)/jury/competitions/[roundId]/page.tsx

@@ -44,7 +44,7 @@ export default function JuryRoundDetailPage() {
           Back
         </Button>
         <div>
-          <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+          <h1 className="text-2xl font-bold tracking-tight text-brand-blue">
             {round?.name || 'Round Details'}
           </h1>
           <p className="text-muted-foreground mt-1">

src/app/(jury)/jury/competitions/[roundId]/projects/[projectId]/evaluate/page.tsx

@@ -460,7 +460,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
         </div>
         <Card className="border-l-4 border-l-amber-500">
           <CardContent className="flex items-start gap-4 p-6">
-            <div className="rounded-xl bg-amber-50 dark:bg-amber-950/40 p-3">
+            <div className="rounded-xl bg-amber-50 p-3">
               <Clock className="h-6 w-6 text-amber-600" />
             </div>
             <div>
@@ -495,7 +495,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
             </Link>
           </Button>
           <div>
-            <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+            <h1 className="text-2xl font-bold tracking-tight text-brand-blue">
               Evaluate Project
             </h1>
             <p className="text-muted-foreground mt-1">{project.title}</p>
@@ -526,7 +526,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
             </Link>
           </Button>
           <div>
-            <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+            <h1 className="text-2xl font-bold tracking-tight text-brand-blue">
               Evaluate Project
             </h1>
             <p className="text-muted-foreground mt-1">{project.title}</p>
@@ -534,7 +534,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
         </div>
         <Card className="border-l-4 border-l-amber-500">
           <CardContent className="flex items-start gap-4 p-6">
-            <div className="rounded-xl bg-amber-50 dark:bg-amber-950/40 p-3">
+            <div className="rounded-xl bg-amber-50 p-3">
               <ShieldAlert className="h-6 w-6 text-amber-600" />
             </div>
             <div>
@@ -573,7 +573,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
           </Button>
         )}
         <div>
-          <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+          <h1 className="text-2xl font-bold tracking-tight text-brand-blue">
             {isReadOnly ? 'Submitted Evaluation' : 'Evaluate Project'}
           </h1>
           <div className="flex items-center gap-2 mt-1">
@@ -583,8 +583,8 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
                 variant="secondary"
                 className={
                   project.competitionCategory === 'STARTUP'
-                    ? 'bg-violet-100 text-violet-700 border-violet-200 dark:bg-violet-950 dark:text-violet-300'
-                    : 'bg-sky-100 text-sky-700 border-sky-200 dark:bg-sky-950 dark:text-sky-300'
+                    ? 'bg-violet-100 text-violet-700 border-violet-200'
+                    : 'bg-sky-100 text-sky-700 border-sky-200'
                 }
               >
                 {project.competitionCategory === 'STARTUP' ? 'Startup' : 'Business Concept'}
@@ -595,7 +595,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
       </div>
 
       {isReadOnly && (
-        <Card className="border-l-4 border-l-blue-500 bg-blue-50/50 dark:bg-blue-950/20">
+        <Card className="border-l-4 border-l-blue-500 bg-blue-50/50">
           <CardContent className="flex items-start gap-3 p-4">
             <Lock className="h-5 w-5 text-blue-600 shrink-0 mt-0.5" />
             <div className="flex-1">

src/app/(jury)/jury/competitions/[roundId]/projects/[projectId]/page.tsx

@@ -98,8 +98,8 @@ export default function JuryProjectDetailPage() {
                 variant="secondary"
                 className={
                   project.competitionCategory === 'STARTUP'
-                    ? 'bg-violet-100 text-violet-700 border-violet-200 dark:bg-violet-950 dark:text-violet-300'
-                    : 'bg-sky-100 text-sky-700 border-sky-200 dark:bg-sky-950 dark:text-sky-300'
+                    ? 'bg-violet-100 text-violet-700 border-violet-200'
+                    : 'bg-sky-100 text-sky-700 border-sky-200'
                 }
               >
                 {project.competitionCategory === 'STARTUP' ? 'Startup' : 'Business Concept'}

src/app/(jury)/jury/competitions/page.tsx

@@ -54,7 +54,7 @@ export default function JuryAssignmentsPage() {
     <div className="space-y-6">
       <div className="flex items-center justify-between">
         <div>
-          <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+          <h1 className="text-2xl font-bold tracking-tight text-brand-blue">
             My Assignments
           </h1>
           <p className="text-muted-foreground mt-1">

src/app/(jury)/jury/page.tsx

@@ -262,7 +262,7 @@ async function JuryDashboardContent() {
           <div className="h-1 w-full bg-gradient-to-r from-brand-teal/40 via-brand-blue/40 to-brand-teal/40" />
           <CardContent className="py-8 px-6">
             <div className="flex flex-col items-center text-center mb-6">
-              <div className="rounded-2xl bg-gradient-to-br from-brand-teal/10 to-brand-blue/10 p-4 mb-3 dark:from-brand-teal/20 dark:to-brand-blue/20">
+              <div className="rounded-2xl bg-gradient-to-br from-brand-teal/10 to-brand-blue/10 p-4 mb-3">
                 <ClipboardList className="h-8 w-8 text-brand-teal/60" />
               </div>
               <p className="text-lg font-semibold">No assignments yet</p>
@@ -273,13 +273,13 @@ async function JuryDashboardContent() {
             <div className={`grid gap-3 max-w-md mx-auto ${juryCompareEnabled ? 'sm:grid-cols-2' : ''}`}>
               <Link
                 href="/jury/competitions"
-                className="group flex items-center gap-3 rounded-xl border border-border/60 p-3 transition-all duration-200 hover:border-brand-blue/30 hover:bg-brand-blue/5 hover:-translate-y-0.5 hover:shadow-md dark:hover:border-brand-teal/30 dark:hover:bg-brand-teal/5"
+                className="group flex items-center gap-3 rounded-xl border border-border/60 p-3 transition-all duration-200 hover:border-brand-blue/30 hover:bg-brand-blue/5 hover:-translate-y-0.5 hover:shadow-md"
               >
-                <div className="rounded-lg bg-blue-50 p-2 transition-colors group-hover:bg-blue-100 dark:bg-blue-950/40">
-                  <ClipboardList className="h-4 w-4 text-blue-600 dark:text-blue-400" />
+                <div className="rounded-lg bg-blue-50 p-2 transition-colors group-hover:bg-blue-100">
+                  <ClipboardList className="h-4 w-4 text-blue-600" />
                 </div>
                 <div className="text-left">
-                  <p className="font-semibold text-sm group-hover:text-brand-blue dark:group-hover:text-brand-teal transition-colors">All Assignments</p>
+                  <p className="font-semibold text-sm group-hover:text-brand-blue transition-colors">All Assignments</p>
                   <p className="text-xs text-muted-foreground">View evaluations</p>
                 </div>
               </Link>
@@ -288,7 +288,7 @@ async function JuryDashboardContent() {
                   href="/jury/competitions"
                   className="group flex items-center gap-3 rounded-xl border border-border/60 p-3 transition-all duration-200 hover:border-brand-teal/30 hover:bg-brand-teal/5 hover:-translate-y-0.5 hover:shadow-md"
                 >
-                  <div className="rounded-lg bg-teal-50 p-2 transition-colors group-hover:bg-teal-100 dark:bg-teal-950/40">
+                  <div className="rounded-lg bg-teal-50 p-2 transition-colors group-hover:bg-teal-100">
                     <GitCompare className="h-4 w-4 text-brand-teal" />
                   </div>
                   <div className="text-left">
@@ -314,8 +314,8 @@ async function JuryDashboardContent() {
               <div className="rounded-[7px] bg-background">
                 <CardHeader className="pb-2 pt-4 px-5">
                   <div className="flex items-center gap-2.5">
-                    <div className="rounded-lg bg-amber-100 p-1.5 dark:bg-amber-900/40">
-                      <Trophy className="h-4 w-4 text-amber-600 dark:text-amber-400" />
+                    <div className="rounded-lg bg-amber-100 p-1.5">
+                      <Trophy className="h-4 w-4 text-amber-600" />
                     </div>
                     <CardTitle className="text-lg">Special Awards — Voting Open</CardTitle>
                   </div>
@@ -333,27 +333,27 @@ async function JuryDashboardContent() {
                         className={cn(
                           'rounded-xl border p-4 space-y-3 transition-all duration-200 hover:-translate-y-0.5 hover:shadow-md',
                           hasVoted
-                            ? 'border-green-200/60 bg-green-50/30 dark:border-green-800/40 dark:bg-green-950/10'
+                            ? 'border-green-200/60 bg-green-50/30'
                             : isUrgent
-                              ? 'border-red-200 bg-red-50/50 dark:border-red-900 dark:bg-red-950/20'
-                              : 'border-amber-200/60 bg-amber-50/30 dark:border-amber-800/40 dark:bg-amber-950/10'
+                              ? 'border-red-200 bg-red-50/50'
+                              : 'border-amber-200/60 bg-amber-50/30'
                         )}
                       >
                         <div className="flex items-start justify-between">
                           <div>
-                            <h3 className={cn('font-semibold', hasVoted ? 'text-green-700 dark:text-green-400' : 'text-amber-700 dark:text-amber-400')}>{award.name}</h3>
+                            <h3 className={cn('font-semibold', hasVoted ? 'text-green-700' : 'text-amber-700')}>{award.name}</h3>
                             <p className="text-xs text-muted-foreground mt-0.5">
                               {award._count.eligibilities} project{award._count.eligibilities !== 1 ? 's' : ''} to review
                               {record.isChair && ' · You are the Chair'}
                             </p>
                           </div>
                           {hasVoted ? (
-                            <Badge className="bg-green-100 text-green-800 border-green-300 dark:bg-green-950 dark:text-green-300 dark:border-green-700">
+                            <Badge className="bg-green-100 text-green-800 border-green-300">
                               <CheckCircle2 className="mr-1 h-3 w-3" />
                               Submitted
                             </Badge>
                           ) : (
-                            <Badge className="bg-amber-100 text-amber-800 border-amber-300 dark:bg-amber-950 dark:text-amber-300 dark:border-amber-700">
+                            <Badge className="bg-amber-100 text-amber-800 border-amber-300">
                               Vote Now
                             </Badge>
                           )}
@@ -452,8 +452,8 @@ async function JuryDashboardContent() {
               <CardHeader className="pb-3">
                 <div className="flex items-center justify-between">
                   <div className="flex items-center gap-2.5">
-                    <div className="rounded-lg bg-brand-blue/10 p-1.5 dark:bg-brand-blue/20">
-                      <ClipboardList className="h-4 w-4 text-brand-blue dark:text-brand-teal" />
+                    <div className="rounded-lg bg-brand-blue/10 p-1.5">
+                      <ClipboardList className="h-4 w-4 text-brand-blue" />
                     </div>
                     <CardTitle className="text-lg">My Assignments</CardTitle>
                   </div>
@@ -487,14 +487,14 @@ async function JuryDashboardContent() {
                             href={`/jury/competitions/${assignment.round.id}/projects/${assignment.project.id}`}
                             className="flex-1 min-w-0 group"
                           >
-                            <p className="text-sm font-medium truncate group-hover:text-brand-blue dark:group-hover:text-brand-teal transition-colors">
+                            <p className="text-sm font-medium truncate group-hover:text-brand-blue transition-colors">
                               {assignment.project.title}
                             </p>
                             <div className="flex items-center gap-2 mt-1">
                               <span className="text-xs text-muted-foreground truncate">
                                 {assignment.project.teamName}
                               </span>
-                              <Badge variant="secondary" className="text-[10px] px-1.5 py-0 bg-brand-blue/5 text-brand-blue/80 dark:bg-brand-teal/10 dark:text-brand-teal/80 border-0">
+                              <Badge variant="secondary" className="text-[10px] px-1.5 py-0 bg-brand-blue/5 text-brand-blue/80 border-0">
                                 {assignment.round.name}
                               </Badge>
                             </div>
@@ -506,7 +506,7 @@ async function JuryDashboardContent() {
                                 Done
                               </Badge>
                             ) : isDraft && isVotingOpen ? (
-                              <Badge className="text-xs bg-amber-100 text-amber-800 border-amber-300 dark:bg-amber-950 dark:text-amber-300 dark:border-amber-700 animate-pulse">
+                              <Badge className="text-xs bg-amber-100 text-amber-800 border-amber-300 animate-pulse">
                                 <Send className="mr-1 h-3 w-3" />
                                 Ready to submit
                               </Badge>
@@ -571,7 +571,7 @@ async function JuryDashboardContent() {
             <Card>
               <CardHeader className="pb-3">
                 <div className="flex items-center gap-2.5">
-                  <div className="rounded-lg bg-brand-teal/10 p-1.5 dark:bg-brand-teal/20">
+                  <div className="rounded-lg bg-brand-teal/10 p-1.5">
                     <Zap className="h-4 w-4 text-brand-teal" />
                   </div>
                   <CardTitle className="text-lg">Quick Actions</CardTitle>
@@ -581,13 +581,13 @@ async function JuryDashboardContent() {
                 <div className={`grid gap-3 ${juryCompareEnabled ? 'sm:grid-cols-2' : ''}`}>
                   <Link
                     href="/jury/competitions"
-                    className="group flex items-center gap-4 rounded-xl border border-border/60 p-4 transition-all duration-200 hover:border-brand-blue/30 hover:bg-brand-blue/5 hover:-translate-y-0.5 hover:shadow-md dark:hover:border-brand-teal/30 dark:hover:bg-brand-teal/5"
+                    className="group flex items-center gap-4 rounded-xl border border-border/60 p-4 transition-all duration-200 hover:border-brand-blue/30 hover:bg-brand-blue/5 hover:-translate-y-0.5 hover:shadow-md"
                   >
-                    <div className="rounded-xl bg-blue-50 p-3 transition-colors group-hover:bg-blue-100 dark:bg-blue-950/40 dark:group-hover:bg-blue-950/60">
-                      <ClipboardList className="h-5 w-5 text-blue-600 dark:text-blue-400" />
+                    <div className="rounded-xl bg-blue-50 p-3 transition-colors group-hover:bg-blue-100">
+                      <ClipboardList className="h-5 w-5 text-blue-600" />
                     </div>
                     <div className="text-left">
-                      <p className="font-semibold text-sm group-hover:text-brand-blue dark:group-hover:text-brand-teal transition-colors">All Assignments</p>
+                      <p className="font-semibold text-sm group-hover:text-brand-blue transition-colors">All Assignments</p>
                       <p className="text-xs text-muted-foreground mt-0.5">View and manage evaluations</p>
                     </div>
                   </Link>
@@ -596,7 +596,7 @@ async function JuryDashboardContent() {
                       href="/jury/competitions"
                       className="group flex items-center gap-4 rounded-xl border border-border/60 p-4 transition-all duration-200 hover:border-brand-teal/30 hover:bg-brand-teal/5 hover:-translate-y-0.5 hover:shadow-md"
                     >
-                      <div className="rounded-xl bg-teal-50 p-3 transition-colors group-hover:bg-teal-100 dark:bg-teal-950/40 dark:group-hover:bg-teal-950/60">
+                      <div className="rounded-xl bg-teal-50 p-3 transition-colors group-hover:bg-teal-100">
                         <GitCompare className="h-5 w-5 text-brand-teal" />
                       </div>
                       <div className="text-left">
@@ -620,8 +620,8 @@ async function JuryDashboardContent() {
                 <div className="h-1 w-full bg-gradient-to-r from-brand-blue via-brand-teal to-brand-blue" />
                 <CardHeader className="pb-3">
                   <div className="flex items-center gap-2.5">
-                    <div className="rounded-lg bg-brand-blue/10 p-1.5 dark:bg-brand-blue/20">
-                      <Waves className="h-4 w-4 text-brand-blue dark:text-brand-teal" />
+                    <div className="rounded-lg bg-brand-blue/10 p-1.5">
+                      <Waves className="h-4 w-4 text-brand-blue" />
                     </div>
                     <div>
                       <CardTitle className="text-lg">Active Voting Stages</CardTitle>
@@ -650,13 +650,13 @@ async function JuryDashboardContent() {
                         className={cn(
                           'rounded-xl border p-4 space-y-3 transition-all duration-200 hover:-translate-y-0.5 hover:shadow-md',
                           isUrgent
-                            ? 'border-red-200 bg-red-50/50 dark:border-red-900 dark:bg-red-950/20'
-                            : 'border-border/60 bg-muted/20 dark:bg-muted/10'
+                            ? 'border-red-200 bg-red-50/50'
+                            : 'border-border/60 bg-muted/20'
                         )}
                       >
                         <div className="flex items-start justify-between">
                           <div>
-                            <h3 className="font-semibold text-brand-blue dark:text-brand-teal">{round.name}</h3>
+                            <h3 className="font-semibold text-brand-blue">{round.name}</h3>
                             <p className="text-xs text-muted-foreground mt-0.5">
                               {program.name} &middot; {program.year}
                             </p>
@@ -716,7 +716,7 @@ async function JuryDashboardContent() {
             <AnimatedCard index={8}>
               <Card>
                 <CardContent className="flex flex-col items-center justify-center py-6 text-center">
-                  <div className="rounded-2xl bg-brand-teal/10 p-3 mb-2 dark:bg-brand-teal/20">
+                  <div className="rounded-2xl bg-brand-teal/10 p-3 mb-2">
                     <Clock className="h-6 w-6 text-brand-teal/70" />
                   </div>
                   <p className="font-semibold text-sm">No active voting stages</p>
@@ -734,7 +734,7 @@ async function JuryDashboardContent() {
               <Card>
                 <CardHeader className="pb-3">
                   <div className="flex items-center gap-2.5">
-                    <div className="rounded-lg bg-brand-teal/10 p-1.5 dark:bg-brand-teal/20">
+                    <div className="rounded-lg bg-brand-teal/10 p-1.5">
                       <BarChart3 className="h-4 w-4 text-brand-teal" />
                     </div>
                     <CardTitle className="text-lg">Round Summary</CardTitle>
@@ -750,7 +750,7 @@ async function JuryDashboardContent() {
                         <div className="flex items-center justify-between text-sm">
                           <span className="font-medium truncate">{round.name}</span>
                           <div className="flex items-baseline gap-1 shrink-0 ml-2">
-                            <span className="font-bold tabular-nums text-brand-blue dark:text-brand-teal">{pct}%</span>
+                            <span className="font-bold tabular-nums text-brand-blue">{pct}%</span>
                             <span className="text-xs text-muted-foreground">({done}/{total})</span>
                           </div>
                         </div>
@@ -852,7 +852,7 @@ export default async function JuryDashboardPage() {
     <div className="space-y-4">
       {/* Header */}
       <div>
-        <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+        <h1 className="text-2xl font-bold tracking-tight text-brand-blue">
           {getGreeting()}, {session?.user?.name || 'Juror'}
         </h1>
         <p className="text-muted-foreground mt-0.5">

src/app/(mentor)/mentor/projects/[id]/page.tsx

@@ -94,14 +94,18 @@ function ProjectDetailContent({ projectId }: { projectId: string }) {
     },
   })
 
+  // TODO(PR8 Task 9): show co-mentors. For now we pick the first assignment
+  // to keep tracking + chat working unchanged.
+  const primaryAssignment = project?.mentorAssignments?.[0] ?? null
+
   // Track view when project loads
   const trackView = trpc.mentor.trackView.useMutation()
   useEffect(() => {
-    if (project?.mentorAssignment?.id) {
-      trackView.mutate({ mentorAssignmentId: project.mentorAssignment.id })
+    if (primaryAssignment?.id) {
+      trackView.mutate({ mentorAssignmentId: primaryAssignment.id })
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [project?.mentorAssignment?.id])
+  }, [primaryAssignment?.id])
 
   if (isLoading) {
     return <ProjectDetailSkeleton />
@@ -135,7 +139,7 @@ function ProjectDetailContent({ projectId }: { projectId: string }) {
 
   const teamLead = project.teamMembers?.find((m) => m.role === 'LEAD')
   const otherMembers = project.teamMembers?.filter((m) => m.role !== 'LEAD') || []
-  const mentorAssignment = project.mentorAssignment
+  const mentorAssignment = primaryAssignment
   const mentorAssignmentId = mentorAssignment?.id
   const programId = project.program?.id
   const viewerIsAssignedMentor =
@@ -477,7 +481,7 @@ function ProjectDetailContent({ projectId }: { projectId: string }) {
         <CardContent>
           <MentorChat
             messages={mentorMessages || []}
-            currentUserId={project.mentorAssignment?.mentor?.id || ''}
+            currentUserId={primaryAssignment?.mentor?.id || ''}
             onSendMessage={async (message) => {
               await sendMessage.mutateAsync({ projectId, message })
             }}
@@ -592,7 +596,7 @@ function MilestonesSection({
               <div
                 key={milestone.id}
                 className={`flex items-start gap-3 p-3 rounded-lg border transition-all duration-200 hover:-translate-y-0.5 hover:shadow-sm ${
-                  isCompleted ? 'bg-green-50/50 border-green-200 dark:bg-green-950/20 dark:border-green-900' : ''
+                  isCompleted ? 'bg-green-50/50 border-green-200' : ''
                 }`}
               >
                 <Checkbox

src/app/(mentor)/mentor/workspace/[projectId]/page.tsx

@@ -1,21 +1,29 @@
 'use client'
 
 import { useParams, useRouter } from 'next/navigation'
+import { useSession } from 'next-auth/react'
 import { trpc } from '@/lib/trpc/client'
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
 import { Button } from '@/components/ui/button'
 import { Badge } from '@/components/ui/badge'
 import { Skeleton } from '@/components/ui/skeleton'
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipProvider,
+  TooltipTrigger,
+} from '@/components/ui/tooltip'
 import { WorkspaceChat } from '@/components/mentor/workspace-chat'
 import { FilePromotionPanel } from '@/components/mentor/file-promotion-panel'
 import { WorkspaceFilesPanel } from '@/components/mentor/workspace-files-panel'
-import { ArrowLeft, MessageSquare, FileText, Upload } from 'lucide-react'
+import { ArrowLeft, MessageSquare, FileText, Upload, Users } from 'lucide-react'
 import { toast } from 'sonner'
 
 export default function MentorWorkspaceDetailPage() {
   const params = useParams()
   const router = useRouter()
+  const { data: session } = useSession()
   const projectId = params.projectId as string
 
   // Get mentor assignment for this project
@@ -27,6 +35,22 @@ export default function MentorWorkspaceDetailPage() {
     { enabled: !!projectId }
   )
 
+  // Co-mentor visibility (PR8 multi-mentor): show who else is on the team.
+  // Gracefully tolerates stale tabs where the caller no longer has access
+  // (assignment dropped) — query just returns nothing in that case.
+  const { data: projectMentors } = trpc.mentor.getProjectMentors.useQuery(
+    { projectId },
+    { enabled: !!projectId, retry: false }
+  )
+
+  const currentUserId = session?.user?.id
+  const coMentors = (projectMentors ?? []).filter(
+    a => a.mentor.id !== currentUserId
+  )
+  const coMentorNames = coMentors.map(a => a.mentor.name ?? 'Unnamed mentor')
+  const visibleCoMentors = coMentorNames.slice(0, 3)
+  const hiddenCoMentors = coMentorNames.slice(3)
+
   if (isLoading) {
     return (
       <div className="space-y-6">
@@ -70,6 +94,37 @@ export default function MentorWorkspaceDetailPage() {
           {project.teamName && (
             <p className="text-muted-foreground mt-1">{project.teamName}</p>
           )}
+          {coMentors.length > 0 && (
+            <div className="mt-2 flex items-center gap-1.5 text-sm text-muted-foreground">
+              <Users className="h-3.5 w-3.5 shrink-0" />
+              <span>
+                You + {coMentors.length} co-mentor
+                {coMentors.length === 1 ? '' : 's'}:{' '}
+                <span className="text-foreground">
+                  {visibleCoMentors.join(', ')}
+                </span>
+                {hiddenCoMentors.length > 0 && (
+                  <>
+                    {' '}
+                    <TooltipProvider>
+                      <Tooltip>
+                        <TooltipTrigger asChild>
+                          <span className="cursor-help underline decoration-dotted underline-offset-2">
+                            +{hiddenCoMentors.length} more
+                          </span>
+                        </TooltipTrigger>
+                        <TooltipContent>
+                          <div className="text-xs">
+                            {hiddenCoMentors.join(', ')}
+                          </div>
+                        </TooltipContent>
+                      </Tooltip>
+                    </TooltipProvider>
+                  </>
+                )}
+              </span>
+            </div>
+          )}
         </div>
       </div>
 
@@ -104,7 +159,10 @@ export default function MentorWorkspaceDetailPage() {
 
         <TabsContent value="files" className="mt-6">
           {assignment ? (
-            <WorkspaceFilesPanel mentorAssignmentId={assignment.id} />
+            <WorkspaceFilesPanel
+              projectId={projectId}
+              mentorAssignmentId={assignment.id}
+            />
           ) : (
             <Card>
               <CardContent className="text-center py-8">
@@ -117,7 +175,7 @@ export default function MentorWorkspaceDetailPage() {
 
         <TabsContent value="promotion" className="mt-6">
           {assignment ? (
-            <FilePromotionPanel mentorAssignmentId={assignment.id} />
+            <FilePromotionPanel projectId={projectId} />
           ) : (
             <Card>
               <CardContent className="text-center py-8">

src/app/(public)/finalist/confirm/[token]/page.tsx

@@ -280,7 +280,7 @@ function FinalistConfirmContent({ token }: { token: string }) {
             Your project <strong>{data.project.title}</strong> is a finalist for the Monaco Ocean
             Protection Challenge grand finale.
           </p>
-          <div className="bg-background border-amber-300 mt-3 rounded-md border-l-4 p-3 dark:border-amber-700">
+          <div className="bg-background border-amber-300 mt-3 rounded-md border-l-4 p-3">
             <p className="text-sm">
               <strong>Confirm by {formatDeadline(deadline)}.</strong>
             </p>

src/app/globals.css

@@ -218,35 +218,6 @@
     --info: 194 25% 44%;
   }
 
-  .dark {
-    --background: 220 15% 8%;
-    --foreground: 0 0% 98%;
-
-    --card: 220 15% 10%;
-    --card-foreground: 0 0% 98%;
-
-    --popover: 220 15% 10%;
-    --popover-foreground: 0 0% 98%;
-
-    --primary: 354 90% 50%;
-    --primary-foreground: 0 0% 100%;
-
-    --secondary: 220 15% 18%;
-    --secondary-foreground: 0 0% 98%;
-
-    --muted: 220 15% 18%;
-    --muted-foreground: 0 0% 64%;
-
-    --accent: 194 20% 18%;
-    --accent-foreground: 0 0% 98%;
-
-    --destructive: 0 84% 55%;
-    --destructive-foreground: 0 0% 100%;
-
-    --border: 220 15% 22%;
-    --input: 220 15% 22%;
-    --ring: 220 10% 50%;
-  }
 }
 
 @layer base {
@@ -345,13 +316,6 @@ div[class*="recharts-tooltip"] {
   opacity: 1 !important;
 }
 
-.dark div[class*="tremor"][class*="tooltip"],
-.dark .recharts-tooltip-wrapper .recharts-default-tooltip,
-.dark div[class*="recharts-tooltip"] {
-  background-color: hsl(var(--card)) !important;
-  border-color: hsl(var(--border)) !important;
-}
-
 /* Tremor/Recharts tooltip color indicator icons — fix rendering */
 .recharts-tooltip-wrapper svg.recharts-surface {
   display: inline-block !important;

src/app/providers.tsx

@@ -2,7 +2,6 @@
 
 import { useState } from 'react'
 import { SessionProvider } from 'next-auth/react'
-import { ThemeProvider } from 'next-themes'
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 import { httpBatchLink } from '@trpc/client'
 import superjson from 'superjson'
@@ -78,12 +77,10 @@ export function Providers({ children }: { children: React.ReactNode }) {
   )
 
   return (
-    <ThemeProvider attribute="class" defaultTheme="light" enableSystem={false}>
-      <SessionProvider>
-        <trpc.Provider client={trpcClient} queryClient={queryClient}>
-          <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>
-        </trpc.Provider>
-      </SessionProvider>
-    </ThemeProvider>
+    <SessionProvider>
+      <trpc.Provider client={trpcClient} queryClient={queryClient}>
+        <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>
+      </trpc.Provider>
+    </SessionProvider>
   )
 }

src/components/admin/assignment/assignment-preview-sheet.tsx

@@ -437,7 +437,7 @@ export function AssignmentPreviewSheet({
             {mode === 'ai' && !aiResult && !isAIGenerating && (
               <Card className="border-dashed">
                 <CardContent className="flex flex-col items-center justify-center py-8 gap-3">
-                  <div className="h-12 w-12 rounded-full bg-violet-100 dark:bg-violet-950 flex items-center justify-center">
+                  <div className="h-12 w-12 rounded-full bg-violet-100 flex items-center justify-center">
                     <Sparkles className="h-6 w-6 text-violet-600" />
                   </div>
                   <div className="text-center space-y-1">
@@ -463,7 +463,7 @@ export function AssignmentPreviewSheet({
             {isLoading ? (
               <div className="space-y-3">
                 {mode === 'ai' && (
-                  <Card className="border-violet-200 bg-violet-50/50 dark:bg-violet-950/20">
+                  <Card className="border-violet-200 bg-violet-50/50">
                     <CardContent className="flex items-center gap-3 py-4">
                       <div className="relative">
                         <div className="h-6 w-6 rounded-full border-2 border-violet-300 border-t-violet-600 animate-spin" />
@@ -567,13 +567,13 @@ export function AssignmentPreviewSheet({
 
                 {/* ── Warnings ── */}
                 {preview.warnings && preview.warnings.length > 0 && (
-                  <Card className="border-amber-300 bg-amber-50/50 dark:bg-amber-950/20">
+                  <Card className="border-amber-300 bg-amber-50/50">
                     <CardContent className="p-3">
                       <div className="flex items-start gap-2">
                         <AlertTriangle className="h-4 w-4 text-amber-600 mt-0.5 shrink-0" />
                         <div className="space-y-1">
                           {preview.warnings.map((w: string, idx: number) => (
-                            <p key={idx} className="text-xs text-amber-800 dark:text-amber-200">
+                            <p key={idx} className="text-xs text-amber-800">
                               {w}
                             </p>
                           ))}

src/components/admin/round/award-shortlist.tsx

@@ -259,7 +259,7 @@ export function AwardShortlist({
                                     }
                                   </p>
                                   {eligibilityMode === 'SEPARATE_POOL' && !hasAwardRounds && (
-                                    <div className="flex items-start gap-2 rounded-md border border-amber-200 bg-amber-50 p-3 text-amber-800 dark:border-amber-800 dark:bg-amber-950/30 dark:text-amber-300">
+                                    <div className="flex items-start gap-2 rounded-md border border-amber-200 bg-amber-50 p-3 text-amber-800">
                                       <AlertTriangle className="h-4 w-4 mt-0.5 shrink-0" />
                                       <p className="text-sm">
                                         No award rounds have been created yet. Projects will be confirmed but <strong>not routed</strong> to an evaluation track. Create rounds on the award page first.

src/components/admin/round/finalization-tab.tsx

@@ -328,13 +328,13 @@ export function FinalizationTab({ roundId, roundStatus }: FinalizationTabProps)
     <div className="space-y-6">
       {/* Grace Period Banner */}
       {summary.isGracePeriodActive && (
-        <Card className="border-amber-200 bg-amber-50 dark:border-amber-800 dark:bg-amber-950/20">
+        <Card className="border-amber-200 bg-amber-50">
           <CardContent className="flex items-center justify-between py-4">
             <div className="flex items-center gap-3">
               <Clock className="h-5 w-5 text-amber-600" />
               <div>
-                <p className="font-medium text-amber-800 dark:text-amber-200">Grace Period Active</p>
-                <p className="text-sm text-amber-600 dark:text-amber-400">
+                <p className="font-medium text-amber-800">Grace Period Active</p>
+                <p className="text-sm text-amber-600">
                   Applicants can still submit until{' '}
                   {summary.gracePeriodEndsAt
                     ? new Date(summary.gracePeriodEndsAt).toLocaleString()
@@ -358,12 +358,12 @@ export function FinalizationTab({ roundId, roundStatus }: FinalizationTabProps)
 
       {/* Finalized Banner */}
       {summary.isFinalized && (
-        <Card className="border-green-200 bg-green-50 dark:border-green-800 dark:bg-green-950/20">
+        <Card className="border-green-200 bg-green-50">
           <CardContent className="flex items-center gap-3 py-4">
             <CheckCircle2 className="h-5 w-5 text-green-600" />
             <div>
-              <p className="font-medium text-green-800 dark:text-green-200">Round Finalized</p>
-              <p className="text-sm text-green-600 dark:text-green-400">
+              <p className="font-medium text-green-800">Round Finalized</p>
+              <p className="text-sm text-green-600">
                 Finalized on{' '}
                 {summary.finalizedAt
                   ? new Date(summary.finalizedAt).toLocaleString()
@@ -376,13 +376,13 @@ export function FinalizationTab({ roundId, roundStatus }: FinalizationTabProps)
 
       {/* Needs Processing Banner */}
       {!summary.isFinalized && !summary.isGracePeriodActive && summary.projects.length > 0 && summary.projects.every((p) => !p.proposedOutcome) && (
-        <Card className="border-blue-200 bg-blue-50 dark:border-blue-800 dark:bg-blue-950/20">
+        <Card className="border-blue-200 bg-blue-50">
           <CardContent className="flex items-center justify-between py-4">
             <div className="flex items-center gap-3">
               <AlertTriangle className="h-5 w-5 text-blue-600" />
               <div>
-                <p className="font-medium text-blue-800 dark:text-blue-200">Projects Need Processing</p>
-                <p className="text-sm text-blue-600 dark:text-blue-400">
+                <p className="font-medium text-blue-800">Projects Need Processing</p>
+                <p className="text-sm text-blue-600">
                   {summary.projects.length} project{summary.projects.length !== 1 ? 's' : ''} in this round have no proposed outcome.
                   Click &quot;Process&quot; to auto-assign outcomes based on round type and project activity.
                 </p>

src/components/admin/round/mentoring-round-overview.tsx

@@ -9,6 +9,7 @@ import {
   ArrowRight,
   Clock,
   FileText,
+  Inbox,
   MessageCircle,
   Target,
   UserCheck,
@@ -48,6 +49,10 @@ export function MentoringRoundOverview({ roundId }: Props) {
     { refetchInterval: 30_000 },
   )
   const { data: pool, isLoading: poolLoading } = trpc.mentor.getMentorPool.useQuery({})
+  const { data: pendingChangeRequests } = trpc.mentor.listChangeRequests.useQuery(
+    { status: 'PENDING' },
+    { refetchInterval: 30_000 },
+  )
 
   if (statsLoading || poolLoading) {
     return (
@@ -60,6 +65,15 @@ export function MentoringRoundOverview({ roundId }: Props) {
   }
   if (!stats || !pool) return null
 
+  const pendingCount = pendingChangeRequests?.length ?? 0
+  // If there's at least one pending request, deep-link directly into the
+  // first one's project (admins can resolve / view siblings from there).
+  // Otherwise the card stays static.
+  const firstPendingProjectId = pendingChangeRequests?.[0]?.project.id ?? null
+  const changeRequestsHref = firstPendingProjectId
+    ? `/admin/projects/${firstPendingProjectId}/mentor`
+    : null
+
   const requestedPct = stats.totalProjects
     ? Math.round((stats.requestedCount / stats.totalProjects) * 100)
     : 0
@@ -110,7 +124,7 @@ export function MentoringRoundOverview({ roundId }: Props) {
           <p className="text-muted-foreground mt-1 text-xs">
             {assignedPct}% of round{' '}
             {stats.awaitingAssignment > 0 && (
-              <span className="text-amber-700 dark:text-amber-400">
+              <span className="text-amber-700">
                 · {stats.awaitingAssignment} awaiting
               </span>
             )}
@@ -173,6 +187,42 @@ export function MentoringRoundOverview({ roundId }: Props) {
         </CardContent>
       </Card>
 
+      <Card
+        className={`md:col-span-2 xl:col-span-4 ${
+          pendingCount > 0 ? 'border-amber-300' : ''
+        }`}
+      >
+        <CardContent className="flex items-center justify-between py-4">
+          <div className="flex items-center gap-3">
+            <Inbox
+              className={`h-5 w-5 ${
+                pendingCount > 0 ? 'text-amber-600' : 'text-muted-foreground'
+              }`}
+            />
+            <div>
+              <div className="text-sm font-medium">Pending change requests</div>
+              <div className="text-muted-foreground text-xs">
+                Team members asking admin to swap a mentor
+              </div>
+            </div>
+          </div>
+          <div className="flex items-center gap-3">
+            <div className="text-2xl font-bold tabular-nums">{pendingCount}</div>
+            {changeRequestsHref ? (
+              <Link
+                href={changeRequestsHref}
+                className="text-muted-foreground hover:text-foreground inline-flex items-center text-xs"
+              >
+                Review
+                <ArrowRight className="ml-0.5 h-3 w-3" />
+              </Link>
+            ) : (
+              <span className="text-muted-foreground text-xs">All clear</span>
+            )}
+          </div>
+        </CardContent>
+      </Card>
+
       <Card className="md:col-span-2 xl:col-span-4">
         <CardHeader className="pb-2">
           <CardTitle className="text-sm">Workspace activity</CardTitle>

src/components/admin/round/project-states-table.tsx

@@ -290,8 +290,8 @@ export function ProjectStatesTable({ competitionId, roundId, roundStatus, compet
     <div className="space-y-4">
       {/* Finalization hint for closed rounds */}
       {(roundStatus === 'ROUND_CLOSED' || roundStatus === 'ROUND_ARCHIVED') && (
-        <div className="flex items-center gap-2 rounded-lg border border-blue-200 bg-blue-50 dark:border-blue-800 dark:bg-blue-950/20 px-4 py-3 text-sm">
-          <span className="text-blue-700 dark:text-blue-300">
+        <div className="flex items-center gap-2 rounded-lg border border-blue-200 bg-blue-50 px-4 py-3 text-sm">
+          <span className="text-blue-700">
             This round is closed. Use the <strong>Finalization</strong> tab to review proposed outcomes and confirm advancement.
           </span>
         </div>

src/components/admin/round/ranking-dashboard.tsx

@@ -699,7 +699,7 @@ export function RankingDashboard({ competitionId: _competitionId, roundId }: Ran
                     This may take a minute. You can continue working — results will appear automatically.
                   </p>
                 </div>
-                <div className="h-2 w-48 rounded-full bg-blue-100 dark:bg-blue-900 overflow-hidden">
+                <div className="h-2 w-48 rounded-full bg-blue-100 overflow-hidden">
                   <div className="h-full w-full rounded-full bg-blue-500 animate-pulse" />
                 </div>
               </>
@@ -962,18 +962,18 @@ export function RankingDashboard({ competitionId: _competitionId, roundId }: Ran
 
         {/* Ranking in-progress banner */}
         {rankingInProgress && (
-          <Card className="border-blue-200 bg-blue-50 dark:border-blue-800 dark:bg-blue-950/30">
+          <Card className="border-blue-200 bg-blue-50">
             <CardContent className="flex items-center gap-3 py-4">
-              <Loader2 className="h-5 w-5 animate-spin text-blue-600 dark:text-blue-400 flex-shrink-0" />
+              <Loader2 className="h-5 w-5 animate-spin text-blue-600 flex-shrink-0" />
               <div className="flex-1 min-w-0">
-                <p className="text-sm font-medium text-blue-900 dark:text-blue-200">
+                <p className="text-sm font-medium text-blue-900">
                   Ranking in progress&hellip;
                 </p>
-                <p className="text-xs text-blue-700 dark:text-blue-400">
+                <p className="text-xs text-blue-700">
                   This may take a minute. You can continue working — results will appear automatically.
                 </p>
               </div>
-              <div className="h-1.5 w-32 rounded-full bg-blue-200 dark:bg-blue-800 overflow-hidden flex-shrink-0">
+              <div className="h-1.5 w-32 rounded-full bg-blue-200 overflow-hidden flex-shrink-0">
                 <div className="h-full w-full rounded-full bg-blue-500 animate-pulse" />
               </div>
             </CardContent>
@@ -1097,7 +1097,7 @@ export function RankingDashboard({ competitionId: _competitionId, roundId }: Ran
                                 animate={{ opacity: 1, y: 0 }}
                                 exit={{ opacity: 0, y: -20 }}
                                 className={isAdvancing
-                                  ? 'rounded-lg bg-emerald-50 border-l-4 border-emerald-400 dark:bg-emerald-950/20 dark:border-emerald-600'
+                                  ? 'rounded-lg bg-emerald-50 border-l-4 border-emerald-400'
                                   : ''}
                               >
                                 <SortableProjectRow
@@ -1120,7 +1120,7 @@ export function RankingDashboard({ competitionId: _competitionId, roundId }: Ran
                               {isCutoffRow && (
                                 <div className="flex items-center gap-2 py-1">
                                   <div className="flex-1 border-t-2 border-dashed border-emerald-400/60" />
-                                  <span className="text-xs font-medium text-emerald-600 dark:text-emerald-400 whitespace-nowrap">
+                                  <span className="text-xs font-medium text-emerald-600 whitespace-nowrap">
                                     Advancement cutoff — {isThresholdMode ? `Score ≥ ${threshold}` : `Top ${advanceCount}`}
                                   </span>
                                   <div className="flex-1 border-t-2 border-dashed border-emerald-400/60" />

src/components/dashboard/smart-actions.tsx

@@ -33,19 +33,19 @@ const severityConfig = {
   critical: {
     icon: AlertTriangle,
     iconClass: 'text-red-600',
-    bgClass: 'bg-red-50 dark:bg-red-950/30',
+    bgClass: 'bg-red-50',
     borderClass: 'border-l-red-500',
   },
   warning: {
     icon: AlertCircle,
     iconClass: 'text-amber-600',
-    bgClass: 'bg-amber-50 dark:bg-amber-950/30',
+    bgClass: 'bg-amber-50',
     borderClass: 'border-l-amber-500',
   },
   info: {
     icon: Info,
     iconClass: 'text-blue-600',
-    bgClass: 'bg-blue-50 dark:bg-blue-950/30',
+    bgClass: 'bg-blue-50',
     borderClass: 'border-l-blue-500',
   },
 }
@@ -54,8 +54,8 @@ export function SmartActions({ actions }: SmartActionsProps) {
   return (
     <Card>
       <CardHeader className="flex flex-row items-center gap-3 space-y-0 pb-4">
-        <div className="flex h-9 w-9 items-center justify-center rounded-lg bg-amber-100 dark:bg-amber-900/40">
-          <Zap className="h-5 w-5 text-amber-600 dark:text-amber-400" />
+        <div className="flex h-9 w-9 items-center justify-center rounded-lg bg-amber-100">
+          <Zap className="h-5 w-5 text-amber-600" />
         </div>
         <CardTitle className="flex-1">Action Required</CardTitle>
         {actions.length > 0 && (
@@ -65,8 +65,8 @@ export function SmartActions({ actions }: SmartActionsProps) {
       <CardContent>
         {actions.length === 0 ? (
           <div className="flex flex-col items-center justify-center py-8 text-center">
-            <div className="flex h-12 w-12 items-center justify-center rounded-full bg-emerald-100 dark:bg-emerald-900/40">
-              <CheckCircle2 className="h-6 w-6 text-emerald-600 dark:text-emerald-400" />
+            <div className="flex h-12 w-12 items-center justify-center rounded-full bg-emerald-100">
+              <CheckCircle2 className="h-6 w-6 text-emerald-600" />
             </div>
             <p className="mt-3 text-sm font-medium text-muted-foreground">
               All caught up!

src/components/evaluation/evaluation-form-fields.tsx

@@ -207,7 +207,7 @@ export function EvaluationFormFields({
                         className={cn(
                           'flex-1 h-12 rounded-lg border-2 flex items-center justify-center text-sm font-medium transition-all',
                           currentValue === true
-                            ? 'border-emerald-500 bg-emerald-50 text-emerald-700 dark:bg-emerald-950/40 dark:text-emerald-400'
+                            ? 'border-emerald-500 bg-emerald-50 text-emerald-700'
                             : 'border-border hover:border-emerald-300 hover:bg-emerald-50/50',
                           isReadOnly && 'opacity-60 cursor-default',
                         )}
@@ -222,7 +222,7 @@ export function EvaluationFormFields({
                         className={cn(
                           'flex-1 h-12 rounded-lg border-2 flex items-center justify-center text-sm font-medium transition-all',
                           currentValue === false
-                            ? 'border-red-500 bg-red-50 text-red-700 dark:bg-red-950/40 dark:text-red-400'
+                            ? 'border-red-500 bg-red-50 text-red-700'
                             : 'border-border hover:border-red-300 hover:bg-red-50/50',
                           isReadOnly && 'opacity-60 cursor-default',
                         )}

src/components/forms/evaluation-form-with-coi.tsx

@@ -83,10 +83,10 @@ export function EvaluationFormWithCOI({
         <CardContent className="flex items-center gap-3 py-6">
           <ShieldAlert className="h-6 w-6 text-amber-600 shrink-0" />
           <div>
-            <p className="font-medium text-amber-800 dark:text-amber-200">
+            <p className="font-medium text-amber-800">
               Conflict of Interest Declared
             </p>
-            <p className="text-sm text-amber-700 dark:text-amber-300 mt-1">
+            <p className="text-sm text-amber-700 mt-1">
               You declared a conflict of interest for this project. An admin will
               review your declaration. You cannot evaluate this project while the
               conflict is under review.

src/components/jury/preferences-banner.tsx

@@ -62,7 +62,7 @@ export function JuryPreferencesBanner() {
   if (isLoading || unconfirmed.length === 0) return null
 
   return (
-    <Card className="border-amber-300 bg-amber-50/50 dark:border-amber-800 dark:bg-amber-950/20">
+    <Card className="border-amber-300 bg-amber-50/50">
       <CardHeader className="pb-3">
         <div className="flex items-center gap-2">
           <Scale className="h-5 w-5 text-amber-600" />

src/components/layouts/role-nav.tsx

@@ -19,11 +19,10 @@ import {
 import type { Route } from 'next'
 import type { LucideIcon } from 'lucide-react'
 import {
-  LogOut, Menu, Moon, Settings, Sun, User, X,
+  LogOut, Menu, Settings, User, X,
   ArrowRightLeft,
   ExternalLink as ExternalLinkIcon, HelpCircle, Mail,
 } from 'lucide-react'
-import { useTheme } from 'next-themes'
 import { Logo } from '@/components/shared/logo'
 import { NotificationBell } from '@/components/shared/notification-bell'
 import { useRoleSwitcher, RoleSwitcherPill } from './role-switcher'
@@ -69,9 +68,6 @@ export function RoleNav({ navigation, roleName, user, basePath, statusBadge, edi
   })
   const endImpersonation = trpc.user.endImpersonation.useMutation()
   const logNavClick = trpc.learningResource.logNavClick.useMutation()
-  const { theme, setTheme } = useTheme()
-  const [mounted, setMounted] = useState(false)
-  useEffect(() => setMounted(true), [])
 
   const handleSignOut = async () => {
     if (isImpersonating) {
@@ -172,20 +168,6 @@ export function RoleNav({ navigation, roleName, user, basePath, statusBadge, edi
                 </DropdownMenuContent>
               </DropdownMenu>
             )}
-            {mounted && (
-              <Button
-                variant="ghost"
-                size="icon"
-                onClick={() => setTheme(theme === 'dark' ? 'light' : 'dark')}
-                aria-label="Toggle theme"
-              >
-                {theme === 'dark' ? (
-                  <Sun className="h-5 w-5" />
-                ) : (
-                  <Moon className="h-5 w-5" />
-                )}
-              </Button>
-            )}
             <RoleSwitcherPill currentBasePath={basePath} />
             <NotificationBell />
             <DropdownMenu>

src/components/mentor/file-promotion-panel.tsx

@@ -17,7 +17,7 @@ import { FileText, Upload, CheckCircle2, ArrowUp } from 'lucide-react'
 import { toast } from 'sonner'
 
 interface FilePromotionPanelProps {
-  mentorAssignmentId: string
+  projectId: string
 }
 
 function formatFileSize(bytes: number): string {
@@ -28,14 +28,14 @@ function formatFileSize(bytes: number): string {
   return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i]
 }
 
-export function FilePromotionPanel({ mentorAssignmentId }: FilePromotionPanelProps) {
+export function FilePromotionPanel({ projectId }: FilePromotionPanelProps) {
   const [selectedSlot, setSelectedSlot] = useState<string>('')
   const utils = trpc.useUtils()
 
   const { data: workspaceFiles = [], isLoading: filesLoading } =
     trpc.mentor.workspaceGetFiles.useQuery(
-      { mentorAssignmentId },
-      { enabled: !!mentorAssignmentId },
+      { projectId },
+      { enabled: !!projectId },
     )
 
   const promoteMutation = trpc.mentor.workspacePromoteFile.useMutation({

src/components/mentor/workspace-files-panel.tsx

@@ -12,10 +12,18 @@ import {
   AlertDialogDescription, AlertDialogFooter, AlertDialogHeader, AlertDialogTitle,
   AlertDialogTrigger,
 } from '@/components/ui/alert-dialog'
-import { FileText, Upload, Download, Trash2, MessageSquare } from 'lucide-react'
+import { Eye, FileText, Upload, Download, Trash2, MessageSquare, X, Loader2 } from 'lucide-react'
 import { formatDistanceToNow } from 'date-fns'
+import { FilePreview, isOfficeFile } from '@/components/shared/file-viewer'
 
 interface Props {
+  /** Project the workspace belongs to — drives file list (project-scoped). */
+  projectId: string
+  /**
+   * One MentorAssignment id on this project — needed only to mint upload tokens
+   * (the token is signed against the assignment + project pair, but the file
+   * itself is project-scoped so co-mentors see it).
+   */
   mentorAssignmentId: string
   /** Set true on the applicant side to label uploads as "Team upload" — purely cosmetic. */
   asApplicant?: boolean
@@ -29,21 +37,21 @@ function formatSize(bytes: number): string {
   return parseFloat((bytes / Math.pow(k, i)).toFixed(1)) + ' ' + sizes[i]
 }
 
-export function WorkspaceFilesPanel({ mentorAssignmentId, asApplicant }: Props) {
+export function WorkspaceFilesPanel({ projectId, mentorAssignmentId, asApplicant }: Props) {
   const utils = trpc.useUtils()
   const inputRef = useRef<HTMLInputElement>(null)
   const [uploading, setUploading] = useState(false)
   const [description, setDescription] = useState('')
 
   const { data: files, isLoading } = trpc.mentor.workspaceGetFiles.useQuery(
-    { mentorAssignmentId },
-    { enabled: !!mentorAssignmentId }
+    { projectId },
+    { enabled: !!projectId }
   )
 
   const presign = trpc.mentor.workspaceGetUploadUrl.useMutation()
   const recordUpload = trpc.mentor.workspaceUploadFile.useMutation({
     onSuccess: () => {
-      utils.mentor.workspaceGetFiles.invalidate({ mentorAssignmentId })
+      utils.mentor.workspaceGetFiles.invalidate({ projectId })
       setDescription('')
       toast.success('File uploaded')
     },
@@ -51,7 +59,7 @@ export function WorkspaceFilesPanel({ mentorAssignmentId, asApplicant }: Props)
   const downloadMutation = trpc.mentor.workspaceGetFileDownloadUrl.useMutation()
   const deleteMutation = trpc.mentor.workspaceDeleteFile.useMutation({
     onSuccess: () => {
-      utils.mentor.workspaceGetFiles.invalidate({ mentorAssignmentId })
+      utils.mentor.workspaceGetFiles.invalidate({ projectId })
       toast.success('File deleted')
     },
     onError: (e) => toast.error(e.message),
@@ -83,10 +91,43 @@ export function WorkspaceFilesPanel({ mentorAssignmentId, asApplicant }: Props)
     }
   }
 
+  const [previewFileId, setPreviewFileId] = useState<string | null>(null)
+  const [previewUrl, setPreviewUrl] = useState<string | null>(null)
+  const [previewLoading, setPreviewLoading] = useState(false)
+
+  const canPreviewMime = (m: string, name: string) =>
+    m.startsWith('video/') || m === 'application/pdf' || m.startsWith('image/') || isOfficeFile(m, name)
+
+  const togglePreview = async (file: { id: string; mimeType: string; fileName: string }) => {
+    if (previewFileId === file.id) {
+      setPreviewFileId(null)
+      setPreviewUrl(null)
+      return
+    }
+    setPreviewFileId(file.id)
+    setPreviewUrl(null)
+    setPreviewLoading(true)
+    try {
+      const { url } = await downloadMutation.mutateAsync({ mentorFileId: file.id, disposition: 'inline' })
+      setPreviewUrl(url)
+    } catch (err) {
+      toast.error(err instanceof Error ? err.message : 'Preview failed')
+      setPreviewFileId(null)
+    } finally {
+      setPreviewLoading(false)
+    }
+  }
+
   const handleDownload = async (mentorFileId: string) => {
     try {
-      const { url } = await downloadMutation.mutateAsync({ mentorFileId })
-      window.open(url, '_blank')
+      const { url } = await downloadMutation.mutateAsync({ mentorFileId, disposition: 'attachment' })
+      const a = document.createElement('a')
+      a.href = url
+      a.download = ''
+      a.rel = 'noopener'
+      document.body.appendChild(a)
+      a.click()
+      a.remove()
     } catch (err) {
       toast.error(err instanceof Error ? err.message : 'Download failed')
     }
@@ -141,8 +182,12 @@ export function WorkspaceFilesPanel({ mentorAssignmentId, asApplicant }: Props)
         )}
 
         <ul className="divide-y">
-          {(files ?? []).map((f) => (
-            <li key={f.id} className="flex items-center gap-3 py-3">
+          {(files ?? []).map((f) => {
+            const isOpen = previewFileId === f.id
+            const previewable = canPreviewMime(f.mimeType, f.fileName)
+            return (
+            <li key={f.id} className="py-3 space-y-2">
+              <div className="flex items-center gap-3">
               <FileText className="h-5 w-5 text-muted-foreground shrink-0" />
               <div className="flex-1 min-w-0">
                 <div className="font-medium truncate">{f.fileName}</div>
@@ -160,7 +205,24 @@ export function WorkspaceFilesPanel({ mentorAssignmentId, asApplicant }: Props)
                   <div className="text-xs text-muted-foreground mt-1">{f.description}</div>
                 )}
               </div>
-              <Button variant="ghost" size="icon" onClick={() => handleDownload(f.id)}>
+              {previewable && (
+                <Button
+                  variant="ghost"
+                  size="icon"
+                  onClick={() => togglePreview(f)}
+                  title={isOpen ? 'Close preview' : 'Preview'}
+                  aria-label={isOpen ? 'Close preview' : 'Preview file'}
+                >
+                  {isOpen ? <X className="h-4 w-4" /> : <Eye className="h-4 w-4" />}
+                </Button>
+              )}
+              <Button
+                variant="ghost"
+                size="icon"
+                onClick={() => handleDownload(f.id)}
+                title="Download"
+                aria-label="Download file"
+              >
                 <Download className="h-4 w-4" />
               </Button>
               <AlertDialog>
@@ -184,8 +246,22 @@ export function WorkspaceFilesPanel({ mentorAssignmentId, asApplicant }: Props)
                   </AlertDialogFooter>
                 </AlertDialogContent>
               </AlertDialog>
+              </div>
+              {isOpen && (
+                <div className="rounded-md border bg-muted/30 overflow-hidden">
+                  {previewLoading || !previewUrl ? (
+                    <div className="flex items-center justify-center py-12 text-sm text-muted-foreground">
+                      <Loader2 className="h-4 w-4 mr-2 animate-spin" />
+                      Loading preview…
+                    </div>
+                  ) : (
+                    <FilePreview file={{ mimeType: f.mimeType, fileName: f.fileName }} url={previewUrl} />
+                  )}
+                </div>
+              )}
             </li>
-          ))}
+            )
+          })}
         </ul>
       </CardContent>
     </Card>

src/components/observer/dashboard/live-final-panel.tsx

@@ -9,10 +9,10 @@ import { Radio, Users, Trophy, Eye, EyeOff } from 'lucide-react'
 import { cn } from '@/lib/utils'
 
 const SESSION_STATUS_CONFIG: Record<string, { label: string; color: string; bg: string; pulse?: boolean }> = {
-  NOT_STARTED: { label: 'Not Started', color: 'text-slate-500', bg: 'bg-slate-100 dark:bg-slate-800' },
-  IN_PROGRESS: { label: 'In Progress', color: 'text-emerald-600', bg: 'bg-emerald-50 dark:bg-emerald-900/20', pulse: true },
-  PAUSED: { label: 'Paused', color: 'text-amber-600', bg: 'bg-amber-50 dark:bg-amber-900/20' },
-  COMPLETED: { label: 'Completed', color: 'text-blue-600', bg: 'bg-blue-50 dark:bg-blue-900/20' },
+  NOT_STARTED: { label: 'Not Started', color: 'text-slate-500', bg: 'bg-slate-100' },
+  IN_PROGRESS: { label: 'In Progress', color: 'text-emerald-600', bg: 'bg-emerald-50', pulse: true },
+  PAUSED: { label: 'Paused', color: 'text-amber-600', bg: 'bg-amber-50' },
+  COMPLETED: { label: 'Completed', color: 'text-blue-600', bg: 'bg-blue-50' },
 }
 
 export function LiveFinalPanel({ roundId }: { roundId: string }) {

src/components/observer/dashboard/previous-round-section.tsx

@@ -52,7 +52,7 @@ export function PreviousRoundSection({ currentRoundId }: { currentRoundId: strin
         {!collapsed && (
           <CardContent className="space-y-4">
             {/* Headline Stat */}
-            <div className="flex items-center gap-3 rounded-lg bg-rose-50 dark:bg-rose-950/20 p-4">
+            <div className="flex items-center gap-3 rounded-lg bg-rose-50 p-4">
               <ArrowDown className="h-6 w-6 text-rose-500 shrink-0" />
               <div>
                 <p className="text-lg font-semibold">
@@ -85,7 +85,7 @@ export function PreviousRoundSection({ currentRoundId }: { currentRoundId: strin
                       </div>
                       <div className="relative h-2.5 rounded-full bg-muted overflow-hidden">
                         <div
-                          className="absolute inset-y-0 left-0 rounded-full bg-slate-300 dark:bg-slate-600 transition-all"
+                          className="absolute inset-y-0 left-0 rounded-full bg-slate-300 transition-all"
                           style={{ width: `${prevPct}%` }}
                         />
                         <div

src/components/observer/reports/filtering-report-tabs.tsx

@@ -37,9 +37,9 @@ type OutcomeFilter = 'ALL' | 'PASSED' | 'FILTERED_OUT' | 'FLAGGED'
 
 function outcomeTextColor(outcome: string): string {
   switch (outcome) {
-    case 'PASSED': return 'text-emerald-700 dark:text-emerald-400'
-    case 'FILTERED_OUT': return 'text-rose-700 dark:text-rose-400'
-    case 'FLAGGED': return 'text-amber-700 dark:text-amber-400'
+    case 'PASSED': return 'text-emerald-700'
+    case 'FILTERED_OUT': return 'text-rose-700'
+    case 'FLAGGED': return 'text-amber-700'
     default: return 'text-primary'
   }
 }

src/components/settings/storage-settings-form.tsx

@@ -339,8 +339,8 @@ export function StorageSettingsForm({ settings }: StorageSettingsFormProps) {
         )}
 
         {storageProvider === 'local' && (
-          <div className="rounded-lg border border-amber-200 bg-amber-50 p-4 dark:border-amber-900 dark:bg-amber-950">
-            <p className="text-sm text-amber-800 dark:text-amber-200">
+          <div className="rounded-lg border border-amber-200 bg-amber-50 p-4">
+            <p className="text-sm text-amber-800">
               <strong>Warning:</strong> Local storage is not recommended for production deployments
               with multiple servers, as files will only be accessible from the server that uploaded them.
             </p>

src/components/shared/countdown-timer.tsx

@@ -62,9 +62,9 @@ function getUrgency(totalMs: number): Urgency {
 
 const urgencyStyles: Record<Urgency, string> = {
   expired: 'text-muted-foreground bg-muted',
-  critical: 'text-red-700 bg-red-50 border-red-200 dark:text-red-400 dark:bg-red-950/50 dark:border-red-900',
-  warning: 'text-amber-700 bg-amber-50 border-amber-200 dark:text-amber-400 dark:bg-amber-950/50 dark:border-amber-900',
-  normal: 'text-green-700 bg-green-50 border-green-200 dark:text-green-400 dark:bg-green-950/50 dark:border-green-900',
+  critical: 'text-red-700 bg-red-50 border-red-200',
+  warning: 'text-amber-700 bg-amber-50 border-amber-200',
+  normal: 'text-green-700 bg-green-50 border-green-200',
 }
 
 export function CountdownTimer({ deadline, label, className }: CountdownTimerProps) {

src/components/shared/edition-selector.tsx

@@ -19,18 +19,18 @@ import { useState } from 'react'
 
 const statusConfig: Record<string, { bg: string; text: string; dot: string }> = {
   DRAFT: {
-    bg: 'bg-amber-50 dark:bg-amber-950/50',
-    text: 'text-amber-700 dark:text-amber-400',
+    bg: 'bg-amber-50',
+    text: 'text-amber-700',
     dot: 'bg-amber-500',
   },
   ACTIVE: {
-    bg: 'bg-emerald-50 dark:bg-emerald-950/50',
-    text: 'text-emerald-700 dark:text-emerald-400',
+    bg: 'bg-emerald-50',
+    text: 'text-emerald-700',
     dot: 'bg-emerald-500',
   },
   ARCHIVED: {
-    bg: 'bg-slate-100 dark:bg-slate-800/50',
-    text: 'text-slate-600 dark:text-slate-400',
+    bg: 'bg-slate-100',
+    text: 'text-slate-600',
     dot: 'bg-slate-400',
   },
 }
@@ -95,10 +95,10 @@ export function EditionSelector() {
 
           {/* Text */}
           <div className="min-w-0 flex-1">
-            <p className="truncate text-sm font-semibold text-slate-900 dark:text-slate-100">
+            <p className="truncate text-sm font-semibold text-slate-900">
               {currentEdition ? currentEdition.year : 'Select'}
             </p>
-            <p className="truncate text-xs text-slate-500 dark:text-slate-400">
+            <p className="truncate text-xs text-slate-500">
               {currentEdition?.status === 'ACTIVE' ? 'Current Edition' : currentEdition?.status?.toLowerCase()}
             </p>
           </div>
@@ -136,7 +136,7 @@ export function EditionSelector() {
                     }}
                     className={cn(
                       'group/item flex items-center gap-3 rounded-lg px-2.5 py-2.5 cursor-pointer transition-colors',
-                      isSelected ? 'bg-slate-100 dark:bg-slate-800' : 'hover:bg-slate-50 dark:hover:bg-slate-800/50'
+                      isSelected ? 'bg-slate-100' : 'hover:bg-slate-50'
                     )}
                   >
                     {/* Year badge in dropdown */}
@@ -144,19 +144,19 @@ export function EditionSelector() {
                       'flex h-9 w-9 shrink-0 items-center justify-center rounded-lg font-bold text-sm transition-colors',
                       isSelected
                         ? 'bg-brand-blue text-white'
-                        : 'bg-slate-200 text-slate-600 dark:bg-slate-700 dark:text-slate-300'
+                        : 'bg-slate-200 text-slate-600'
                     )}>
                       {String(edition.year).slice(-2)}
                     </div>
 
                     {/* Edition info */}
                     <div className="min-w-0 flex-1">
-                      <p className="truncate text-sm font-semibold text-slate-900 dark:text-slate-100">
+                      <p className="truncate text-sm font-semibold text-slate-900">
                         {edition.year}
                       </p>
                       <div className="flex items-center gap-1.5">
                         <div className={cn('h-1.5 w-1.5 rounded-full', editionStatus.dot)} />
-                        <span className="text-xs text-slate-500 dark:text-slate-400 capitalize">
+                        <span className="text-xs text-slate-500 capitalize">
                           {edition.status.toLowerCase()}
                         </span>
                       </div>

src/components/shared/file-viewer.tsx

@@ -827,9 +827,9 @@ function RequirementChecklist({ roundId, files }: { roundId: string; files: Proj
               className={cn(
                 'flex items-center gap-3 rounded-lg border p-2.5 text-sm',
                 isFulfilled
-                  ? 'border-green-200 bg-green-50 dark:border-green-900 dark:bg-green-950'
+                  ? 'border-green-200 bg-green-50'
                   : req.isRequired
-                    ? 'border-red-200 bg-red-50 dark:border-red-900 dark:bg-red-950'
+                    ? 'border-red-200 bg-red-50'
                     : 'border-muted'
               )}
             >

src/components/shared/notification-bell.tsx

@@ -108,20 +108,20 @@ const ICON_MAP: Record<string, React.ComponentType<{ className?: string }>> = {
 // Priority styles
 const PRIORITY_STYLES = {
   low: {
-    iconBg: 'bg-slate-100 dark:bg-slate-800',
+    iconBg: 'bg-slate-100',
     iconColor: 'text-slate-500',
   },
   normal: {
-    iconBg: 'bg-blue-100 dark:bg-blue-900/30',
-    iconColor: 'text-blue-600 dark:text-blue-400',
+    iconBg: 'bg-blue-100',
+    iconColor: 'text-blue-600',
   },
   high: {
-    iconBg: 'bg-amber-100 dark:bg-amber-900/30',
-    iconColor: 'text-amber-600 dark:text-amber-400',
+    iconBg: 'bg-amber-100',
+    iconColor: 'text-amber-600',
   },
   urgent: {
-    iconBg: 'bg-red-100 dark:bg-red-900/30',
-    iconColor: 'text-red-600 dark:text-red-400',
+    iconBg: 'bg-red-100',
+    iconColor: 'text-red-600',
   },
 }
 
@@ -158,7 +158,7 @@ function NotificationItem({
       data-notification-id={notification.id}
       className={cn(
         'flex gap-3 p-3 hover:bg-muted/50 transition-colors cursor-pointer',
-        !notification.isRead && 'bg-blue-50/50 dark:bg-blue-950/20'
+        !notification.isRead && 'bg-blue-50/50'
       )}
       onClick={onRead}
     >

src/components/shared/requirement-upload-slot.tsx

@@ -263,9 +263,9 @@ export function RequirementUploadSlot({
 
   const isFulfilled = !!existingFile
   const statusColor = isFulfilled
-    ? 'border-green-200 bg-green-50 dark:border-green-900 dark:bg-green-950'
+    ? 'border-green-200 bg-green-50'
     : requirement.isRequired
-      ? 'border-red-200 bg-red-50 dark:border-red-900 dark:bg-red-950'
+      ? 'border-red-200 bg-red-50'
       : 'border-muted'
 
   // Build accept string for file input

src/components/shared/status-badge.tsx

@@ -4,39 +4,39 @@ import { cn } from '@/lib/utils'
 const STATUS_STYLES: Record<string, { variant: BadgeProps['variant']; className?: string }> = {
   // Round statuses
   DRAFT: { variant: 'secondary' },
-  ACTIVE: { variant: 'default', className: 'bg-blue-500/10 text-blue-700 border-blue-200 dark:text-blue-400' },
-  EVALUATION: { variant: 'default', className: 'bg-violet-500/10 text-violet-700 border-violet-200 dark:text-violet-400' },
+  ACTIVE: { variant: 'default', className: 'bg-blue-500/10 text-blue-700 border-blue-200' },
+  EVALUATION: { variant: 'default', className: 'bg-violet-500/10 text-violet-700 border-violet-200' },
   CLOSED: { variant: 'secondary', className: 'bg-slate-500/10 text-slate-600 border-slate-200' },
   ROUND_DRAFT: { variant: 'secondary' },
-  ROUND_ACTIVE: { variant: 'default', className: 'bg-blue-500/10 text-blue-700 border-blue-200 dark:text-blue-400' },
+  ROUND_ACTIVE: { variant: 'default', className: 'bg-blue-500/10 text-blue-700 border-blue-200' },
   ROUND_CLOSED: { variant: 'secondary', className: 'bg-slate-500/10 text-slate-600 border-slate-200' },
   ROUND_ARCHIVED: { variant: 'secondary', className: 'bg-slate-400/10 text-slate-400 border-slate-200' },
 
   // Project statuses
-  SUBMITTED: { variant: 'secondary', className: 'bg-indigo-500/10 text-indigo-700 border-indigo-200 dark:text-indigo-400' },
-  ELIGIBLE: { variant: 'default', className: 'bg-emerald-500/10 text-emerald-700 border-emerald-200 dark:text-emerald-400' },
-  ASSIGNED: { variant: 'default', className: 'bg-violet-500/10 text-violet-700 border-violet-200 dark:text-violet-400' },
-  UNDER_REVIEW: { variant: 'default', className: 'bg-blue-500/10 text-blue-700 border-blue-200 dark:text-blue-400' },
-  SHORTLISTED: { variant: 'default', className: 'bg-amber-500/10 text-amber-700 border-amber-200 dark:text-amber-400' },
-  SEMIFINALIST: { variant: 'default', className: 'bg-amber-500/10 text-amber-700 border-amber-200 dark:text-amber-400' },
-  FINALIST: { variant: 'default', className: 'bg-orange-500/10 text-orange-700 border-orange-200 dark:text-orange-400' },
-  WINNER: { variant: 'default', className: 'bg-yellow-500/10 text-yellow-800 border-yellow-300 dark:text-yellow-400' },
+  SUBMITTED: { variant: 'secondary', className: 'bg-indigo-500/10 text-indigo-700 border-indigo-200' },
+  ELIGIBLE: { variant: 'default', className: 'bg-emerald-500/10 text-emerald-700 border-emerald-200' },
+  ASSIGNED: { variant: 'default', className: 'bg-violet-500/10 text-violet-700 border-violet-200' },
+  UNDER_REVIEW: { variant: 'default', className: 'bg-blue-500/10 text-blue-700 border-blue-200' },
+  SHORTLISTED: { variant: 'default', className: 'bg-amber-500/10 text-amber-700 border-amber-200' },
+  SEMIFINALIST: { variant: 'default', className: 'bg-amber-500/10 text-amber-700 border-amber-200' },
+  FINALIST: { variant: 'default', className: 'bg-orange-500/10 text-orange-700 border-orange-200' },
+  WINNER: { variant: 'default', className: 'bg-yellow-500/10 text-yellow-800 border-yellow-300' },
   REJECTED: { variant: 'destructive' },
   WITHDRAWN: { variant: 'secondary' },
 
   // Observer-derived statuses
-  NOT_REVIEWED: { variant: 'secondary', className: 'bg-slate-500/10 text-slate-600 border-slate-200 dark:text-slate-400' },
-  REVIEWED: { variant: 'default', className: 'bg-emerald-500/10 text-emerald-700 border-emerald-200 dark:text-emerald-400' },
+  NOT_REVIEWED: { variant: 'secondary', className: 'bg-slate-500/10 text-slate-600 border-slate-200' },
+  REVIEWED: { variant: 'default', className: 'bg-emerald-500/10 text-emerald-700 border-emerald-200' },
 
   // Round state statuses
-  PENDING: { variant: 'secondary', className: 'bg-slate-500/10 text-slate-600 border-slate-200 dark:text-slate-400' },
-  IN_PROGRESS: { variant: 'default', className: 'bg-blue-500/10 text-blue-700 border-blue-200 dark:text-blue-400' },
-  COMPLETED: { variant: 'default', className: 'bg-emerald-500/10 text-emerald-700 border-emerald-200 dark:text-emerald-400' },
-  PASSED: { variant: 'default', className: 'bg-green-500/10 text-green-700 border-green-200 dark:text-green-400' },
+  PENDING: { variant: 'secondary', className: 'bg-slate-500/10 text-slate-600 border-slate-200' },
+  IN_PROGRESS: { variant: 'default', className: 'bg-blue-500/10 text-blue-700 border-blue-200' },
+  COMPLETED: { variant: 'default', className: 'bg-emerald-500/10 text-emerald-700 border-emerald-200' },
+  PASSED: { variant: 'default', className: 'bg-green-500/10 text-green-700 border-green-200' },
 
   // User statuses
-  NONE: { variant: 'secondary', className: 'bg-slate-500/10 text-slate-500 border-slate-200 dark:text-slate-400' },
-  INVITED: { variant: 'secondary', className: 'bg-sky-500/10 text-sky-700 border-sky-200 dark:text-sky-400' },
+  NONE: { variant: 'secondary', className: 'bg-slate-500/10 text-slate-500 border-slate-200' },
+  INVITED: { variant: 'secondary', className: 'bg-sky-500/10 text-sky-700 border-sky-200' },
   INACTIVE: { variant: 'secondary' },
   SUSPENDED: { variant: 'destructive' },
 }

src/components/ui/alert.tsx

@@ -9,11 +9,11 @@ const alertVariants = cva(
       variant: {
         default: "bg-background text-foreground",
         destructive:
-          "border-destructive/50 text-destructive dark:border-destructive [&>svg]:text-destructive",
+          "border-destructive/50 text-destructive [&>svg]:text-destructive",
         success:
-          "border-green-500/50 text-green-700 dark:border-green-500 [&>svg]:text-green-600",
+          "border-green-500/50 text-green-700 [&>svg]:text-green-600",
         warning:
-          "border-yellow-500/50 text-yellow-700 dark:border-yellow-500 [&>svg]:text-yellow-600",
+          "border-yellow-500/50 text-yellow-700 [&>svg]:text-yellow-600",
       },
     },
     defaultVariants: {

src/components/ui/badge.tsx

@@ -15,10 +15,10 @@ const badgeVariants = cva(
           'border-transparent bg-destructive text-destructive-foreground shadow hover:bg-destructive/80',
         outline: 'text-foreground',
         success:
-          'border-transparent bg-green-100 text-green-800 dark:bg-green-900 dark:text-green-100',
+          'border-transparent bg-green-100 text-green-800',
         warning:
-          'border-transparent bg-amber-100 text-amber-800 dark:bg-amber-900 dark:text-amber-100',
-        info: 'border-transparent bg-blue-100 text-blue-800 dark:bg-blue-900 dark:text-blue-100',
+          'border-transparent bg-amber-100 text-amber-800',
+        info: 'border-transparent bg-blue-100 text-blue-800',
       },
     },
     defaultVariants: {

src/lib/email.ts

@@ -2752,6 +2752,177 @@ export async function sendMentorOnboardingEmail(email: string, name: string | nu
   await sendEmail({ to: email, subject: template.subject, text: template.text, html: template.html })
 }
 
+// =============================================================================
+// Per-team mentor assignment (fires every time a mentor is added to a project)
+// =============================================================================
+
+function getMentorTeamAssignmentTemplate(
+  name: string,
+  projectTitle: string,
+  workspaceUrl: string,
+): EmailTemplate {
+  const subject = `You've been assigned to a new MOPC project: "${projectTitle}"`
+  const greeting = name ? `Hi ${name},` : 'Hi there,'
+  const text = [
+    greeting,
+    '',
+    `You have been assigned as a mentor to the project "${projectTitle}".`,
+    '',
+    'You may have co-mentors on this team — you can collaborate together in the project workspace.',
+    '',
+    `Open the workspace: ${workspaceUrl}`,
+    '',
+    'The MOPC team',
+  ].join('\n')
+
+  const html = `
+<!DOCTYPE html>
+<html>
+<body style="margin:0;padding:0;background:#f6f8fa;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;color:#0f172a;">
+  <div style="max-width:560px;margin:32px auto;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,0.06);">
+    <div style="background:#053d57;padding:24px 28px;color:#fefefe;">
+      <h1 style="margin:0;font-size:20px;font-weight:600;">New mentor assignment</h1>
+    </div>
+    <div style="padding:24px 28px;line-height:1.5;font-size:14px;">
+      <p style="margin-top:0;">${name ? `Hi ${escapeHtml(name)},` : 'Hi there,'}</p>
+      <p>You have been assigned as a mentor to the project <strong>${escapeHtml(projectTitle)}</strong>.</p>
+      <p style="margin-top:24px;">
+        <a href="${workspaceUrl}" style="display:inline-block;padding:10px 20px;background:#de0f1e;color:#fff;text-decoration:none;border-radius:6px;font-weight:600;">Open Project Workspace</a>
+      </p>
+      <p style="margin-top:24px;color:#64748b;font-size:12px;">
+        You may have co-mentors on this team — you can collaborate together in the project workspace.
+      </p>
+    </div>
+    <div style="padding:16px 28px;background:#f1f5f9;color:#64748b;font-size:12px;text-align:center;">
+      Monaco Ocean Protection Challenge
+    </div>
+  </div>
+</body>
+</html>
+  `.trim()
+
+  return { subject, text, html }
+}
+
+/**
+ * Send a per-team mentor assignment email. Fires every time a mentor is added
+ * to a specific project (distinct from the one-time onboarding email).
+ * Idempotency is enforced at the call site via MentorAssignment.notificationSentAt.
+ * Never throws — failures are caught and logged.
+ */
+export async function sendMentorTeamAssignmentEmail(
+  email: string,
+  name: string | null,
+  projectTitle: string,
+  projectId: string,
+): Promise<void> {
+  try {
+    const baseUrl = process.env.NEXTAUTH_URL || 'https://monaco-opc.com'
+    const workspaceUrl = `${baseUrl.replace(/\/$/, '')}/mentor/workspace/${projectId}`
+    const template = getMentorTeamAssignmentTemplate(name || '', projectTitle, workspaceUrl)
+    await sendEmail({ to: email, subject: template.subject, text: template.text, html: template.html })
+  } catch (error) {
+    console.error('[sendMentorTeamAssignmentEmail] failed', { email, projectId, error })
+  }
+}
+
+// =============================================================================
+// Mentor change requests (PR 8) — admin notification when an applicant or admin
+// opens a MentorChangeRequest. Mentors are NOT notified (per design decision).
+// =============================================================================
+
+function getMentorChangeRequestTemplate(
+  projectTitle: string,
+  requesterName: string | null,
+  reason: string,
+  adminDashboardUrl: string,
+): EmailTemplate {
+  const subject = `Mentor change request for "${projectTitle}"`
+  const requesterLabel = requesterName || 'a team member'
+  const text = [
+    'Hi MOPC admins,',
+    '',
+    `A mentor change request has been opened by ${requesterLabel} for the project "${projectTitle}".`,
+    '',
+    'Reason:',
+    `"${reason}"`,
+    '',
+    `Review the request: ${adminDashboardUrl}`,
+    '',
+    'The MOPC team',
+  ].join('\n')
+
+  const html = `
+<!DOCTYPE html>
+<html>
+<body style="margin:0;padding:0;background:#f6f8fa;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,Arial,sans-serif;color:#0f172a;">
+  <div style="max-width:560px;margin:32px auto;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,0.06);">
+    <div style="background:#053d57;padding:24px 28px;color:#fefefe;">
+      <h1 style="margin:0;font-size:20px;font-weight:600;">Mentor change request</h1>
+    </div>
+    <div style="padding:24px 28px;line-height:1.5;font-size:14px;">
+      <p style="margin-top:0;">Hi MOPC admins,</p>
+      <p>A mentor change request has been opened by <strong>${escapeHtml(requesterLabel)}</strong> for the project <strong>${escapeHtml(projectTitle)}</strong>.</p>
+      <blockquote style="margin:16px 0;padding:12px 16px;background:#f1f5f9;border-left:3px solid #557f8c;border-radius:4px;color:#0f172a;font-style:italic;white-space:pre-wrap;">${escapeHtml(reason)}</blockquote>
+      <p style="margin-top:24px;">
+        <a href="${adminDashboardUrl}" style="display:inline-block;padding:10px 20px;background:#de0f1e;color:#fff;text-decoration:none;border-radius:6px;font-weight:600;">Review Request</a>
+      </p>
+      <p style="margin-top:24px;color:#64748b;font-size:12px;">
+        Mentors are not notified of change requests; only admins see this.
+      </p>
+    </div>
+    <div style="padding:16px 28px;background:#f1f5f9;color:#64748b;font-size:12px;text-align:center;">
+      Monaco Ocean Protection Challenge
+    </div>
+  </div>
+</body>
+</html>
+  `.trim()
+
+  return { subject, text, html }
+}
+
+/**
+ * Notify all SUPER_ADMIN / PROGRAM_ADMIN users that a mentor change request
+ * has been opened for a project. Sends one email per recipient.
+ * Never throws — failures are caught and logged so the calling mutation
+ * (mentor.requestChange) never fails because of email infrastructure issues.
+ */
+export async function sendMentorChangeRequestEmail(
+  adminEmails: string[],
+  projectTitle: string,
+  requesterName: string | null,
+  reason: string,
+  adminDashboardUrl: string,
+): Promise<void> {
+  try {
+    if (adminEmails.length === 0) {
+      console.warn('[sendMentorChangeRequestEmail] no admin recipients; skipping')
+      return
+    }
+    const template = getMentorChangeRequestTemplate(
+      projectTitle,
+      requesterName,
+      reason,
+      adminDashboardUrl,
+    )
+    await Promise.all(
+      adminEmails.map((email) =>
+        sendEmail({
+          to: email,
+          subject: template.subject,
+          text: template.text,
+          html: template.html,
+        }).catch((err) => {
+          console.error('[sendMentorChangeRequestEmail] send failed', { email, err })
+        }),
+      ),
+    )
+  } catch (error) {
+    console.error('[sendMentorChangeRequestEmail] failed', { error })
+  }
+}
+
 function getFinalistConfirmationTemplate(
   name: string,
   projectTitle: string,

src/lib/mentor-upload-token.ts

@@ -2,6 +2,13 @@ import { createHmac, timingSafeEqual } from 'crypto'
 
 export type MentorUploadPayload = {
   mentorAssignmentId: string
+  /**
+   * Project the upload belongs to. Bound at token-issue time so the file's
+   * project scope can't be tampered with separately from the assignment id.
+   * Required (no legacy fallback) — tokens live <1h, so any in-flight tokens
+   * issued before this field was added expire on their own.
+   */
+  projectId: string
   uploaderUserId: string
   fileName: string
   mimeType: string
@@ -47,5 +54,8 @@ export function verifyMentorUploadToken(token: string): MentorUploadPayload {
   if (typeof payload.exp !== 'number' || payload.exp < Math.floor(Date.now() / 1000)) {
     throw new Error('Invalid mentor upload token: expired')
   }
+  if (typeof payload.projectId !== 'string' || payload.projectId.length === 0) {
+    throw new Error('Invalid mentor upload token: missing projectId')
+  }
   return payload
 }

src/lib/minio.ts

@@ -78,13 +78,17 @@ export async function getPresignedUrl(
   objectKey: string,
   method: 'GET' | 'PUT' = 'GET',
   expirySeconds: number = 900, // 15 minutes default
-  options?: { downloadFileName?: string }
+  options?: { downloadFileName?: string; inline?: boolean; contentType?: string }
 ): Promise<string> {
   const publicClient = getPublicMinioClient()
   if (method === 'GET') {
-    const respHeaders = options?.downloadFileName
-      ? { 'response-content-disposition': `attachment; filename="${options.downloadFileName}"` }
-      : undefined
+    let respHeaders: Record<string, string> | undefined
+    if (options?.inline) {
+      respHeaders = { 'response-content-disposition': 'inline' }
+      if (options.contentType) respHeaders['response-content-type'] = options.contentType
+    } else if (options?.downloadFileName) {
+      respHeaders = { 'response-content-disposition': `attachment; filename="${options.downloadFileName}"` }
+    }
     return publicClient.presignedGetObject(bucket, objectKey, expirySeconds, respHeaders)
   } else {
     return publicClient.presignedPutObject(bucket, objectKey, expirySeconds)

src/server/routers/analytics.ts

@@ -2403,4 +2403,67 @@ export const analyticsRouter = router({
         prisma: ctx.prisma,
       })
     }),
+
+  /**
+   * Nationality breakdown for the applicants (team members) of projects in
+   * the selected scope. Counts UNIQUE users so a single applicant on
+   * multiple teams isn't double-counted.
+   *
+   * Scope:
+   *   - roundId set → projects with a ProjectRoundState in that round
+   *   - programId set → projects in that program
+   *   - neither → all team members across all projects (global)
+   */
+  getApplicantNationalities: adminProcedure
+    .input(
+      z
+        .object({
+          roundId: z.string().optional(),
+          programId: z.string().optional(),
+        })
+        .optional()
+    )
+    .query(async ({ ctx, input }) => {
+      const roundId = input?.roundId
+      const programId = input?.programId
+
+      const projectFilter = roundId
+        ? { projectRoundStates: { some: { roundId } } }
+        : programId
+          ? { programId }
+          : {}
+
+      // Pull all distinct team-member userIds + their nationality in one query.
+      // `distinct: ['userId']` collapses a user appearing on multiple teams in
+      // the same scope to a single row.
+      const teamMembers = await ctx.prisma.teamMember.findMany({
+        where: { project: projectFilter },
+        select: { userId: true, user: { select: { nationality: true } } },
+        distinct: ['userId'],
+      })
+
+      const total = teamMembers.length
+      const declaredEntries = teamMembers.filter(
+        (tm) => tm.user?.nationality && tm.user.nationality.trim().length > 0
+      )
+      const declared = declaredEntries.length
+      const notDeclared = total - declared
+
+      const counts = new Map<string, number>()
+      for (const tm of declaredEntries) {
+        const code = (tm.user!.nationality as string).trim()
+        counts.set(code, (counts.get(code) ?? 0) + 1)
+      }
+
+      const byCountry = Array.from(counts.entries())
+        .map(([country, count]) => ({ country, count }))
+        .sort((a, b) => b.count - a.count || a.country.localeCompare(b.country))
+
+      return {
+        total,
+        declared,
+        notDeclared,
+        byCountry,
+      }
+    }),
 })

src/server/routers/applicant.ts

@@ -1176,7 +1176,7 @@ export const applicantRouter = router({
           ],
         },
         include: {
-          mentorAssignment: { select: { mentorId: true } },
+          mentorAssignments: { select: { mentorId: true } },
         },
       })
 
@@ -1187,7 +1187,10 @@ export const applicantRouter = router({
         })
       }
 
-      if (!project.mentorAssignment) {
+      // TODO(PR8 Task 7): notify ALL assigned mentors. For now we notify the
+      // first one for legacy parity.
+      const primaryMentorAssignment = project.mentorAssignments[0] ?? null
+      if (!primaryMentorAssignment) {
         throw new TRPCError({
           code: 'BAD_REQUEST',
           message: 'No mentor assigned to this project',
@@ -1207,9 +1210,9 @@ export const applicantRouter = router({
         },
       })
 
-      // Notify the mentor
+      // Notify the (primary) mentor
       await createNotification({
-        userId: project.mentorAssignment.mentorId,
+        userId: primaryMentorAssignment.mentorId,
         type: 'MENTOR_MESSAGE',
         title: 'New Message',
         message: `${ctx.user.name || 'Team member'} sent a message about "${project.title}"`,
@@ -1313,12 +1316,13 @@ export const applicantRouter = router({
         submittedBy: {
           select: { id: true, name: true, email: true },
         },
-        mentorAssignment: {
+        mentorAssignments: {
           include: {
             mentor: {
-              select: { id: true, name: true, email: true },
+              select: { id: true, name: true, email: true, expertiseTags: true },
             },
           },
+          orderBy: { assignedAt: 'asc' },
         },
         wonAwards: {
           select: { id: true, name: true },
@@ -1489,6 +1493,17 @@ export const applicantRouter = router({
       logoUrl = await provider.getDownloadUrl(project.logoKey)
     }
 
+    // Does this user have an open mentor-change request for this project?
+    // (Used by the applicant mentor page to disable the "Request a change" button.)
+    const myPendingChangeRequest = await ctx.prisma.mentorChangeRequest.findFirst({
+      where: {
+        projectId: project.id,
+        requestedByUserId: ctx.user.id,
+        status: 'PENDING',
+      },
+      select: { id: true },
+    })
+
     return {
       project: {
         ...project,
@@ -1502,6 +1517,7 @@ export const applicantRouter = router({
       hasPassedIntake: !!passedIntake,
       isIntakeOpen: !!activeIntakeRound,
       logoUrl,
+      hasPendingMentorChangeRequest: !!myPendingChangeRequest,
     }
   }),
 
@@ -1523,7 +1539,7 @@ export const applicantRouter = router({
       select: {
         id: true,
         programId: true,
-        mentorAssignment: { select: { id: true } },
+        mentorAssignments: { select: { id: true }, take: 1 },
       },
     })
 
@@ -1531,8 +1547,8 @@ export const applicantRouter = router({
       return { hasMentor: false, hasEvaluationRounds: false }
     }
 
-    // Check if mentor is assigned
-    const hasMentor = !!project.mentorAssignment
+    // Check if mentor is assigned (any active assignment counts)
+    const hasMentor = project.mentorAssignments.length > 0
 
     // Check if feedback is available — first check admin settings, then fall back to per-round config
     let hasEvaluationRounds = false
@@ -2689,8 +2705,12 @@ export const applicantRouter = router({
         })
       }
 
-      const assignment = await ctx.prisma.mentorAssignment.findUnique({
+      // TODO(PR8 Task 7): when multiple mentors are assigned, surface them all
+      // in the applicant message thread. For now we display the most recently
+      // assigned (non-dropped) mentor as the "primary".
+      const assignment = await ctx.prisma.mentorAssignment.findFirst({
         where: { projectId: input.projectId },
+        orderBy: { assignedAt: 'desc' },
         include: { mentor: { select: { id: true, name: true, email: true } } },
       })
 

src/server/routers/finalist.ts

@@ -772,7 +772,8 @@ export const finalistRouter = router({
             select: {
               id: true,
               title: true,
-              mentorAssignment: {
+              mentorAssignments: {
+                where: { droppedAt: null, completionStatus: { not: 'completed' } },
                 select: {
                   id: true,
                   completionStatus: true,
@@ -796,10 +797,12 @@ export const finalistRouter = router({
         data: { status: 'SUPERSEDED' },
       })
 
-      // Cascade: drop active mentor assignment (skip if completed or already dropped)
-      const ma = confirmation.project.mentorAssignment
+      // Cascade: drop ALL active mentor assignments (skip dropped/completed —
+      // those were filtered out by the include `where` above). With multi-mentor
+      // (PR8) we propagate the cascade to every active assignment.
+      const activeAssignments = confirmation.project.mentorAssignments
       let cascadedMentorAssignment = false
-      if (ma && !ma.droppedAt && ma.completionStatus !== 'completed') {
+      for (const ma of activeAssignments) {
         await ctx.prisma.mentorAssignment.update({
           where: { id: ma.id },
           data: {
@@ -833,6 +836,7 @@ export const finalistRouter = router({
           reason: input.reason,
           projectId: confirmation.projectId,
           cascadedMentorAssignment,
+          cascadedAssignmentCount: activeAssignments.length,
         },
       })
       return { ok: true, cascadedMentorAssignment }

src/server/routers/mentor.ts

@@ -1,7 +1,16 @@
 import { z } from 'zod'
 import { TRPCError } from '@trpc/server'
 import { router, mentorProcedure, adminProcedure, protectedProcedure } from '../trpc'
-import { MentorAssignmentMethod, type PrismaClient } from '@prisma/client'
+import {
+  MentorAssignmentMethod,
+  MentorChangeRequestStatus,
+  Prisma,
+  type PrismaClient,
+} from '@prisma/client'
+import {
+  sendMentorChangeRequestEmail,
+  sendMentorTeamAssignmentEmail,
+} from '@/lib/email'
 import {
   getAIMentorSuggestions,
   getRoundRobinMentor,
@@ -66,6 +75,42 @@ async function assertWorkspaceAccess(
   throw new TRPCError({ code: 'FORBIDDEN', message: 'You are not a member of this workspace' })
 }
 
+/**
+ * Project-scoped workspace access check (PR8 multi-mentor).
+ *
+ * Allowed when the user is either:
+ *   1) currently assigned as a mentor on this project (droppedAt = null), OR
+ *   2) a team member of the project.
+ *
+ * Also requires at least one active mentor assignment for the project with
+ * workspaceEnabled = true — meaning the project actually has a live workspace.
+ * Throws TRPCError on failure. Returns nothing on success.
+ */
+async function assertProjectWorkspaceAccess(
+  prisma: PrismaClient,
+  userId: string,
+  projectId: string,
+): Promise<void> {
+  const liveMentorAssignment = await prisma.mentorAssignment.findFirst({
+    where: { projectId, droppedAt: null, workspaceEnabled: true },
+    select: { id: true },
+  })
+  if (!liveMentorAssignment) {
+    throw new TRPCError({ code: 'FORBIDDEN', message: 'Workspace is not enabled' })
+  }
+  const mentorOnProject = await prisma.mentorAssignment.findFirst({
+    where: { projectId, mentorId: userId, droppedAt: null },
+    select: { id: true },
+  })
+  if (mentorOnProject) return
+  const teamMembership = await prisma.teamMember.findFirst({
+    where: { projectId, userId },
+    select: { id: true },
+  })
+  if (teamMembership) return
+  throw new TRPCError({ code: 'FORBIDDEN', message: 'You are not a member of this workspace' })
+}
+
 export const mentorRouter = router({
   /**
    * Get AI-suggested mentor matches for a project
@@ -82,18 +127,15 @@ export const mentorRouter = router({
       const project = await ctx.prisma.project.findUniqueOrThrow({
         where: { id: input.projectId },
         include: {
-          mentorAssignment: true,
+          mentorAssignments: true,
         },
       })
 
-      if (project.mentorAssignment) {
-        return {
-          currentMentor: project.mentorAssignment,
-          suggestions: [],
-          source: 'ai' as const,
-          message: 'Project already has a mentor assigned',
-        }
-      }
+      // With multi-mentor (PR8) the project can have several mentors. The
+      // suggestions endpoint is informational — return whatever AI suggests
+      // and let `mentor.assign` enforce per-pair uniqueness. We still surface
+      // an existing primary mentor in the payload so UIs can label it.
+      const primaryMentor = project.mentorAssignments[0] ?? null
 
       // Detect AI configuration so the UI can label "AI matching unavailable"
       // when we fall back to algorithmic ranking. An AI error mid-call still
@@ -140,7 +182,9 @@ export const mentorRouter = router({
       })
 
       return {
-        currentMentor: null,
+        // TODO(PR8 Task 8): return the full mentor list. Legacy field kept
+        // until the admin UI is updated.
+        currentMentor: primaryMentor,
         suggestions: enrichedSuggestions.filter((s) => s.mentor !== null),
         source,
         message: null,
@@ -219,52 +263,62 @@ export const mentorRouter = router({
       })
     )
     .mutation(async ({ ctx, input }) => {
-      // Verify project exists and doesn't have a mentor
+      // Verify project exists (multi-mentor: stacking is allowed; duplicate
+      // (projectId, mentorId) pairs are rejected by the unique constraint
+      // below).
       const project = await ctx.prisma.project.findUniqueOrThrow({
         where: { id: input.projectId },
-        include: { mentorAssignment: true },
       })
 
-      if (project.mentorAssignment) {
-        throw new TRPCError({
-          code: 'CONFLICT',
-          message: 'Project already has a mentor assigned',
-        })
-      }
-
       // Verify mentor exists
       const mentor = await ctx.prisma.user.findUniqueOrThrow({
         where: { id: input.mentorId },
       })
 
-      // Create assignment
-      const assignment = await ctx.prisma.mentorAssignment.create({
-        data: {
-          projectId: input.projectId,
-          mentorId: input.mentorId,
-          method: input.method,
-          assignedBy: ctx.user.id,
-          aiConfidenceScore: input.aiConfidenceScore,
-          expertiseMatchScore: input.expertiseMatchScore,
-          aiReasoning: input.aiReasoning,
-        },
-        include: {
-          mentor: {
-            select: {
-              id: true,
-              name: true,
-              email: true,
-              expertiseTags: true,
+      // Create assignment. P2002 on the composite (projectId, mentorId) unique
+      // constraint means this exact mentor is already on this team — surface a
+      // friendly error.
+      let assignment
+      try {
+        assignment = await ctx.prisma.mentorAssignment.create({
+          data: {
+            projectId: input.projectId,
+            mentorId: input.mentorId,
+            method: input.method,
+            assignedBy: ctx.user.id,
+            aiConfidenceScore: input.aiConfidenceScore,
+            expertiseMatchScore: input.expertiseMatchScore,
+            aiReasoning: input.aiReasoning,
+          },
+          include: {
+            mentor: {
+              select: {
+                id: true,
+                name: true,
+                email: true,
+                expertiseTags: true,
+              },
+            },
+            project: {
+              select: {
+                id: true,
+                title: true,
+              },
             },
           },
-          project: {
-            select: {
-              id: true,
-              title: true,
-            },
-          },
-        },
-      })
+        })
+      } catch (err) {
+        if (
+          err instanceof Prisma.PrismaClientKnownRequestError &&
+          err.code === 'P2002'
+        ) {
+          throw new TRPCError({
+            code: 'CONFLICT',
+            message: 'This mentor is already assigned to that project.',
+          })
+        }
+        throw err
+      }
 
       // Audit outside transaction so failures don't roll back the assignment
       await logAudit({
@@ -279,6 +333,8 @@ export const mentorRouter = router({
           mentorId: input.mentorId,
           mentorName: assignment.mentor.name,
           method: input.method,
+          // PR8: per-team assignment (one row per mentor-project pair).
+          assignmentScope: 'per-team',
         },
         ipAddress: ctx.ip,
         userAgent: ctx.userAgent,
@@ -320,6 +376,27 @@ export const mentorRouter = router({
         },
       })
 
+      // Send per-team email notification once per assignment row. Idempotency
+      // is enforced via MentorAssignment.notificationSentAt — a fresh row has
+      // it null. If the same mentor is later dropped and re-assigned (new row,
+      // fresh id), a new email is sent — intentional.
+      if (assignment.notificationSentAt == null && assignment.mentor.email) {
+        await sendMentorTeamAssignmentEmail(
+          assignment.mentor.email,
+          assignment.mentor.name,
+          assignment.project.title,
+          input.projectId,
+        )
+        try {
+          await ctx.prisma.mentorAssignment.update({
+            where: { id: assignment.id },
+            data: { notificationSentAt: new Date() },
+          })
+        } catch (e) {
+          console.error('[Mentor] failed to stamp notificationSentAt (non-fatal):', e)
+        }
+      }
+
       // Auto-transition: mark project IN_PROGRESS in any active MENTORING round
       try {
         const mentoringPrs = await ctx.prisma.projectRoundState.findFirst({
@@ -351,13 +428,16 @@ export const mentorRouter = router({
       })
     )
     .mutation(async ({ ctx, input }) => {
-      // Verify project exists and doesn't have a mentor
+      // Verify project exists and doesn't already have a mentor. Multi-mentor
+      // stacking is reserved for explicit admin assignment via `mentor.assign`;
+      // auto-assignment skips projects that already have at least one mentor
+      // to avoid double-AI-assignments.
       const project = await ctx.prisma.project.findUniqueOrThrow({
         where: { id: input.projectId },
-        include: { mentorAssignment: true },
+        include: { mentorAssignments: { select: { id: true } } },
       })
 
-      if (project.mentorAssignment) {
+      if (project.mentorAssignments.length > 0) {
         throw new TRPCError({
           code: 'CONFLICT',
           message: 'Project already has a mentor assigned',
@@ -485,29 +565,51 @@ export const mentorRouter = router({
     }),
 
   /**
-   * Remove mentor assignment
+   * Remove mentor assignment.
+   *
+   * Multi-mentor (PR8): callers should pass `assignmentId` to target a
+   * specific co-mentor. Legacy callers passing only `projectId` get the
+   * most-recent assignment removed (kept for backward compatibility).
    */
   unassign: adminProcedure
-    .input(z.object({ projectId: z.string() }))
+    .input(
+      z
+        .object({
+          assignmentId: z.string().optional(),
+          projectId: z.string().optional(),
+        })
+        .refine((v) => !!v.assignmentId || !!v.projectId, {
+          message: 'Either assignmentId or projectId is required',
+        }),
+    )
     .mutation(async ({ ctx, input }) => {
-      const assignment = await ctx.prisma.mentorAssignment.findUnique({
-        where: { projectId: input.projectId },
-        include: {
-          mentor: { select: { id: true, name: true } },
-          project: { select: { id: true, title: true } },
-        },
-      })
+      const assignment = input.assignmentId
+        ? await ctx.prisma.mentorAssignment.findUnique({
+            where: { id: input.assignmentId },
+            include: {
+              mentor: { select: { id: true, name: true } },
+              project: { select: { id: true, title: true } },
+            },
+          })
+        : await ctx.prisma.mentorAssignment.findFirst({
+            where: { projectId: input.projectId! },
+            orderBy: { assignedAt: 'desc' },
+            include: {
+              mentor: { select: { id: true, name: true } },
+              project: { select: { id: true, title: true } },
+            },
+          })
 
       if (!assignment) {
         throw new TRPCError({
           code: 'NOT_FOUND',
-          message: 'No mentor assignment found for this project',
+          message: 'No mentor assignment found',
         })
       }
 
       // Delete assignment
       await ctx.prisma.mentorAssignment.delete({
-        where: { projectId: input.projectId },
+        where: { id: assignment.id },
       })
 
       // Audit outside transaction so failures don't roll back the unassignment
@@ -518,7 +620,7 @@ export const mentorRouter = router({
         entityType: 'MentorAssignment',
         entityId: assignment.id,
         detailsJson: {
-          projectId: input.projectId,
+          projectId: assignment.project.id,
           projectTitle: assignment.project.title,
           mentorId: assignment.mentor.id,
           mentorName: assignment.mentor.name,
@@ -546,7 +648,7 @@ export const mentorRouter = router({
       const projects = await ctx.prisma.project.findMany({
         where: {
           programId: input.programId,
-          mentorAssignment: null,
+          mentorAssignments: { none: {} },
           wantsMentorship: true,
         },
         select: { id: true },
@@ -716,7 +818,7 @@ export const mentorRouter = router({
         where: {
           roundId: input.roundId,
           project: {
-            mentorAssignment: null,
+            mentorAssignments: { none: {} },
             // Only assign mentors to projects whose team has confirmed they will
             // attend the grand finale. This skips PENDING/DECLINED/EXPIRED/SUPERSEDED
             // confirmations and any project without a confirmation row at all.
@@ -834,7 +936,7 @@ export const mentorRouter = router({
         where: {
           roundId: input.roundId,
           project: {
-            mentorAssignment: { isNot: null },
+            mentorAssignments: { some: {} },
             ...(eligibility === 'requested_only' ? { wantsMentorship: true } : {}),
           },
         },
@@ -906,13 +1008,13 @@ export const mentorRouter = router({
         ctx.prisma.projectRoundState.count({
           where: {
             roundId: input.roundId,
-            project: { wantsMentorship: true, mentorAssignment: { isNot: null } },
+            project: { wantsMentorship: true, mentorAssignments: { some: {} } },
           },
         }),
         ctx.prisma.projectRoundState.count({
           where: {
             roundId: input.roundId,
-            project: { mentorAssignment: { isNot: null } },
+            project: { mentorAssignments: { some: {} } },
           },
         }),
         ctx.prisma.mentorMessage.count({
@@ -1107,7 +1209,11 @@ export const mentorRouter = router({
           status: true,
           oceanIssue: true,
           competitionCategory: true,
-          mentorAssignment: {
+          mentorAssignments: {
+            // TODO(PR8 Task 8): surface all mentors in the activity view.
+            // For now keep the legacy single-mentor activity row by picking the
+            // latest-assigned, non-dropped assignment (or the most-recent overall).
+            orderBy: { assignedAt: 'desc' },
             select: {
               id: true,
               method: true,
@@ -1157,7 +1263,10 @@ export const mentorRouter = router({
 
       const rows = projects.map((p) => {
         // Treat a dropped mentor assignment as if no mentor is assigned.
-        const ma = p.mentorAssignment && !p.mentorAssignment.droppedAt ? p.mentorAssignment : null
+        // TODO(PR8 Task 8): surface all mentors. Legacy shape: pick the most
+        // recent non-dropped assignment for the activity row.
+        const firstActive = p.mentorAssignments.find((a) => !a.droppedAt) ?? null
+        const ma = firstActive
         const lastMessageAt = ma?.messages[0]?.createdAt ?? null
         const lastFileAt = ma?.files[0]?.createdAt ?? null
         const lastActivityAt = [lastMessageAt, lastFileAt]
@@ -1235,6 +1344,50 @@ export const mentorRouter = router({
     return assignments
   }),
 
+  /**
+   * List all active mentors assigned to a project (PR8 multi-mentor).
+   *
+   * Returns one row per active MentorAssignment (droppedAt = null) with the
+   * mentor's id + name. Used by the mentor workspace page to display the
+   * co-mentor team so each mentor knows who else they're working with.
+   *
+   * Authorization: caller must be an active mentor on the project (or an
+   * admin via mentorProcedure). Non-assigned mentors get FORBIDDEN.
+   */
+  getProjectMentors: mentorProcedure
+    .input(z.object({ projectId: z.string() }))
+    .query(async ({ ctx, input }) => {
+      const isAdmin = ['SUPER_ADMIN', 'PROGRAM_ADMIN'].includes(ctx.user.role)
+
+      if (!isAdmin) {
+        const ownAssignment = await ctx.prisma.mentorAssignment.findFirst({
+          where: {
+            projectId: input.projectId,
+            mentorId: ctx.user.id,
+            droppedAt: null,
+          },
+          select: { id: true },
+        })
+        if (!ownAssignment) {
+          throw new TRPCError({
+            code: 'FORBIDDEN',
+            message: 'You are not assigned to mentor this project',
+          })
+        }
+      }
+
+      const assignments = await ctx.prisma.mentorAssignment.findMany({
+        where: { projectId: input.projectId, droppedAt: null },
+        select: {
+          id: true,
+          mentor: { select: { id: true, name: true } },
+        },
+        orderBy: { assignedAt: 'asc' },
+      })
+
+      return assignments
+    }),
+
   /**
    * Get detailed project info for a mentor's assigned project
    */
@@ -1279,7 +1432,7 @@ export const mentorRouter = router({
           files: {
             orderBy: { createdAt: 'desc' },
           },
-          mentorAssignment: {
+          mentorAssignments: {
             include: {
               mentor: {
                 select: { id: true, name: true, email: true },
@@ -2080,6 +2233,7 @@ export const mentorRouter = router({
       const exp = Math.floor(Date.now() / 1000) + 3600
       const uploadToken = signMentorUploadToken({
         mentorAssignmentId: assignment.id,
+        projectId: assignment.projectId,
         uploaderUserId: ctx.user.id,
         fileName: input.fileName,
         mimeType: input.mimeType,
@@ -2136,45 +2290,55 @@ export const mentorRouter = router({
     }),
 
   /**
-   * List files in a workspace. Authorized for the assigned mentor or any
-   * project team member.
+   * List files in a project's mentor workspace. Authorized for any mentor
+   * currently assigned to the project, or any team member of the project.
+   *
+   * Project-scoped (PR8): all co-mentors share one file list, and files
+   * survive even when an originating assignment is later dropped.
    */
   workspaceGetFiles: protectedProcedure
-    .input(z.object({ mentorAssignmentId: z.string() }))
+    .input(z.object({ projectId: z.string() }))
     .query(async ({ ctx, input }) => {
-      await assertWorkspaceAccess(ctx.prisma, ctx.user.id, input.mentorAssignmentId)
-      return workspaceGetFilesService(input.mentorAssignmentId, ctx.prisma)
+      await assertProjectWorkspaceAccess(ctx.prisma, ctx.user.id, input.projectId)
+      return workspaceGetFilesService(input.projectId, ctx.prisma)
     }),
 
   /**
    * Issue a short-lived presigned GET URL to download a workspace file.
    */
   workspaceGetFileDownloadUrl: protectedProcedure
-    .input(z.object({ mentorFileId: z.string() }))
+    .input(z.object({
+      mentorFileId: z.string(),
+      disposition: z.enum(['inline', 'attachment']).default('attachment'),
+    }))
     .mutation(async ({ ctx, input }) => {
       const file = await ctx.prisma.mentorFile.findUnique({
         where: { id: input.mentorFileId },
-        select: { bucket: true, objectKey: true, fileName: true, mentorAssignmentId: true },
+        select: { bucket: true, objectKey: true, fileName: true, mimeType: true, projectId: true },
       })
       if (!file) throw new TRPCError({ code: 'NOT_FOUND', message: 'File not found' })
-      await assertWorkspaceAccess(ctx.prisma, ctx.user.id, file.mentorAssignmentId)
+      await assertProjectWorkspaceAccess(ctx.prisma, ctx.user.id, file.projectId)
       const url = await getPresignedUrl(file.bucket, file.objectKey, 'GET', 900,
-        { downloadFileName: file.fileName })
+        input.disposition === 'inline'
+          ? { inline: true, contentType: file.mimeType }
+          : { downloadFileName: file.fileName })
       return { url }
     }),
 
   /**
-   * Delete a workspace file (uploader or assigned mentor only).
+   * Delete a workspace file. Authorized for the uploader, any mentor
+   * currently assigned to the file's project, or any team member of the
+   * file's project. Final auth check lives in the service.
    */
   workspaceDeleteFile: protectedProcedure
     .input(z.object({ mentorFileId: z.string() }))
     .mutation(async ({ ctx, input }) => {
       const file = await ctx.prisma.mentorFile.findUnique({
         where: { id: input.mentorFileId },
-        select: { mentorAssignmentId: true },
+        select: { projectId: true },
       })
       if (!file) throw new TRPCError({ code: 'NOT_FOUND', message: 'File not found' })
-      await assertWorkspaceAccess(ctx.prisma, ctx.user.id, file.mentorAssignmentId)
+      await assertProjectWorkspaceAccess(ctx.prisma, ctx.user.id, file.projectId)
       try {
         await workspaceDeleteFileService(
           { mentorFileId: input.mentorFileId, userId: ctx.user.id },
@@ -2204,12 +2368,12 @@ export const mentorRouter = router({
     .mutation(async ({ ctx, input }) => {
       const file = await ctx.prisma.mentorFile.findUnique({
         where: { id: input.mentorFileId },
-        select: { mentorAssignmentId: true },
+        select: { projectId: true },
       })
       if (!file) {
         throw new TRPCError({ code: 'NOT_FOUND', message: 'File not found' })
       }
-      await assertWorkspaceAccess(ctx.prisma, ctx.user.id, file.mentorAssignmentId)
+      await assertProjectWorkspaceAccess(ctx.prisma, ctx.user.id, file.projectId)
       return workspaceAddFileComment(
         {
           mentorFileId: input.mentorFileId,
@@ -2414,4 +2578,243 @@ export const mentorRouter = router({
         })),
       }
     }),
+
+  // ===========================================================================
+  // Mentor change requests (PR8)
+  //
+  // Applicants (team members) or admins can open a PENDING change request for
+  // a project — optionally targeting a specific co-mentor assignment. Admins
+  // are notified by email; mentors are intentionally NOT notified, even after
+  // resolution (per design decision in the PR8 plan).
+  // ===========================================================================
+
+  /**
+   * Open a new mentor change request. Allowed for:
+   *   • SUPER_ADMIN / PROGRAM_ADMIN (any project), or
+   *   • a team member of the target project.
+   *
+   * Rejects with CONFLICT if the same user already has an open (PENDING) request
+   * for the same project. The raw `reason` is intentionally NOT included in
+   * audit logs — only its length — for privacy. Email delivery to admins is
+   * best-effort and never throws.
+   */
+  requestChange: protectedProcedure
+    .input(
+      z.object({
+        projectId: z.string().min(1),
+        targetAssignmentId: z.string().min(1).optional(),
+        reason: z.string().min(10).max(2000),
+      }),
+    )
+    .mutation(async ({ ctx, input }) => {
+      const isAdmin = ['SUPER_ADMIN', 'PROGRAM_ADMIN'].includes(ctx.user.role)
+
+      // Authorization: admin OR team member of the project
+      if (!isAdmin) {
+        const teamMembership = await ctx.prisma.teamMember.findFirst({
+          where: { projectId: input.projectId, userId: ctx.user.id },
+          select: { id: true },
+        })
+        if (!teamMembership) {
+          throw new TRPCError({
+            code: 'FORBIDDEN',
+            message: 'You are not a member of this project',
+          })
+        }
+      }
+
+      // Load project (also confirms it exists) and validate optional target
+      const project = await ctx.prisma.project.findUnique({
+        where: { id: input.projectId },
+        select: { id: true, title: true },
+      })
+      if (!project) {
+        throw new TRPCError({ code: 'NOT_FOUND', message: 'Project not found' })
+      }
+
+      if (input.targetAssignmentId) {
+        const targetAssignment = await ctx.prisma.mentorAssignment.findUnique({
+          where: { id: input.targetAssignmentId },
+          select: { id: true, projectId: true },
+        })
+        if (!targetAssignment || targetAssignment.projectId !== input.projectId) {
+          throw new TRPCError({
+            code: 'BAD_REQUEST',
+            message: 'Target assignment does not belong to this project',
+          })
+        }
+      }
+
+      // One open request per (user, project)
+      const existingOpen = await ctx.prisma.mentorChangeRequest.findFirst({
+        where: {
+          projectId: input.projectId,
+          requestedByUserId: ctx.user.id,
+          status: MentorChangeRequestStatus.PENDING,
+        },
+        select: { id: true },
+      })
+      if (existingOpen) {
+        throw new TRPCError({
+          code: 'CONFLICT',
+          message: 'You already have an open mentor change request for this project.',
+        })
+      }
+
+      const created = await ctx.prisma.mentorChangeRequest.create({
+        data: {
+          projectId: input.projectId,
+          targetAssignmentId: input.targetAssignmentId ?? null,
+          requestedByUserId: ctx.user.id,
+          reason: input.reason,
+          status: MentorChangeRequestStatus.PENDING,
+        },
+        select: { id: true, status: true, createdAt: true },
+      })
+
+      // Notify admins (best-effort, never throw)
+      try {
+        const admins = await ctx.prisma.user.findMany({
+          where: {
+            OR: [
+              { roles: { has: 'SUPER_ADMIN' } },
+              { roles: { has: 'PROGRAM_ADMIN' } },
+            ],
+            status: 'ACTIVE',
+          },
+          select: { email: true },
+        })
+        const baseUrl = process.env.NEXTAUTH_URL || 'https://monaco-opc.com'
+        const adminDashboardUrl = `${baseUrl.replace(/\/$/, '')}/admin/projects/${input.projectId}/mentor`
+        await sendMentorChangeRequestEmail(
+          admins.map((a) => a.email),
+          project.title,
+          ctx.user.name ?? null,
+          input.reason,
+          adminDashboardUrl,
+        )
+      } catch (err) {
+        // Defense-in-depth: the helper already has its own try/catch
+        console.error('[mentor.requestChange] notify admins failed:', err)
+      }
+
+      await logAudit({
+        prisma: ctx.prisma,
+        userId: ctx.user.id,
+        action: 'MENTOR_CHANGE_REQUEST_CREATE',
+        entityType: 'MentorChangeRequest',
+        entityId: created.id,
+        detailsJson: {
+          projectId: input.projectId,
+          targetAssignmentId: input.targetAssignmentId ?? null,
+          reasonLength: input.reason.length,
+        },
+      })
+
+      return created
+    }),
+
+  /**
+   * Admin inbox — list MentorChangeRequest rows, optionally filtered by status
+   * and/or project. PENDING rows are surfaced first; within each status group
+   * rows are ordered by createdAt desc. No pagination (low-volume admin view).
+   */
+  listChangeRequests: adminProcedure
+    .input(
+      z
+        .object({
+          status: z.nativeEnum(MentorChangeRequestStatus).optional(),
+          projectId: z.string().optional(),
+        })
+        .optional(),
+    )
+    .query(async ({ ctx, input }) => {
+      const where: Prisma.MentorChangeRequestWhereInput = {}
+      if (input?.status) where.status = input.status
+      if (input?.projectId) where.projectId = input.projectId
+
+      const rows = await ctx.prisma.mentorChangeRequest.findMany({
+        where,
+        include: {
+          project: { select: { id: true, title: true } },
+          targetAssignment: {
+            select: {
+              id: true,
+              mentor: { select: { id: true, name: true, email: true } },
+            },
+          },
+          requestedBy: { select: { id: true, name: true, email: true } },
+          resolvedBy: { select: { id: true, name: true, email: true } },
+        },
+        // PENDING first, then RESOLVED/DISMISSED. Within each: newest first.
+        orderBy: [{ status: 'asc' }, { createdAt: 'desc' }],
+      })
+
+      // Enum order is PENDING < RESOLVED < DISMISSED alphabetically — DISMISSED
+      // is "D" so it sorts before PENDING. Re-sort in JS to guarantee PENDING
+      // appears first regardless of enum string ordering.
+      const statusRank: Record<MentorChangeRequestStatus, number> = {
+        [MentorChangeRequestStatus.PENDING]: 0,
+        [MentorChangeRequestStatus.RESOLVED]: 1,
+        [MentorChangeRequestStatus.DISMISSED]: 2,
+      }
+      return rows.sort((a, b) => {
+        const sa = statusRank[a.status] - statusRank[b.status]
+        if (sa !== 0) return sa
+        return b.createdAt.getTime() - a.createdAt.getTime()
+      })
+    }),
+
+  /**
+   * Admin resolves a PENDING request as RESOLVED or DISMISSED. Re-resolution
+   * is rejected. No email or notification is sent to the requester or mentors
+   * (per PR8 design decision — mentors are never informed of change requests).
+   */
+  resolveChangeRequest: adminProcedure
+    .input(
+      z.object({
+        id: z.string().min(1),
+        status: z.enum(['RESOLVED', 'DISMISSED']),
+        resolutionNote: z.string().max(2000).optional(),
+      }),
+    )
+    .mutation(async ({ ctx, input }) => {
+      const existing = await ctx.prisma.mentorChangeRequest.findUnique({
+        where: { id: input.id },
+        select: { id: true, status: true, projectId: true },
+      })
+      if (!existing) {
+        throw new TRPCError({ code: 'NOT_FOUND', message: 'Request not found' })
+      }
+      if (existing.status !== MentorChangeRequestStatus.PENDING) {
+        throw new TRPCError({
+          code: 'BAD_REQUEST',
+          message: 'Request already resolved',
+        })
+      }
+
+      const updated = await ctx.prisma.mentorChangeRequest.update({
+        where: { id: existing.id },
+        data: {
+          status: input.status as MentorChangeRequestStatus,
+          resolvedByUserId: ctx.user.id,
+          resolvedAt: new Date(),
+          resolutionNote: input.resolutionNote ?? null,
+        },
+      })
+
+      await logAudit({
+        prisma: ctx.prisma,
+        userId: ctx.user.id,
+        action: 'MENTOR_CHANGE_REQUEST_RESOLVE',
+        entityType: 'MentorChangeRequest',
+        entityId: existing.id,
+        detailsJson: {
+          status: input.status,
+          projectId: existing.projectId,
+        },
+      })
+
+      return updated
+    }),
 })

src/server/routers/project.ts

@@ -188,7 +188,7 @@ export const projectRouter = router({
           orClauses.push({ assignments: { some: { userId: ctx.user.id } } })
         }
         if (userHasRole(ctx.user, 'MENTOR')) {
-          orClauses.push({ mentorAssignment: { mentorId: ctx.user.id } })
+          orClauses.push({ mentorAssignments: { some: { mentorId: ctx.user.id } } })
         }
         if (userHasRole(ctx.user, 'APPLICANT')) {
           orClauses.push({ teamMembers: { some: { userId: ctx.user.id } } })
@@ -511,7 +511,7 @@ export const projectRouter = router({
             },
             orderBy: { joinedAt: 'asc' },
           },
-          mentorAssignment: {
+          mentorAssignments: {
             include: {
               mentor: {
                 select: { id: true, name: true, email: true, expertiseTags: true, profileImageKey: true, profileImageProvider: true },
@@ -585,14 +585,18 @@ export const projectRouter = router({
         }))
       )
 
-      const mentorWithAvatar = project.mentorAssignment
+      // TODO(PR8 Task 8): surface all mentors. For now we keep the legacy
+      // single-mentor shape and just pick the first non-dropped assignment
+      // so the admin UI keeps rendering without changes.
+      const primaryAssignment = project.mentorAssignments[0] ?? null
+      const mentorWithAvatar = primaryAssignment
         ? {
-            ...project.mentorAssignment,
+            ...primaryAssignment,
             mentor: {
-              ...project.mentorAssignment.mentor,
+              ...primaryAssignment.mentor,
               avatarUrl: await getUserAvatarUrl(
-                project.mentorAssignment.mentor.profileImageKey,
-                project.mentorAssignment.mentor.profileImageProvider
+                primaryAssignment.mentor.profileImageKey,
+                primaryAssignment.mentor.profileImageProvider
               ),
             },
           }
@@ -1311,7 +1315,7 @@ export const projectRouter = router({
               },
               orderBy: { joinedAt: 'asc' },
             },
-            mentorAssignment: {
+            mentorAssignments: {
               include: {
                 mentor: {
                   select: { id: true, name: true, email: true, expertiseTags: true, profileImageKey: true, profileImageProvider: true },
@@ -1448,18 +1452,21 @@ export const projectRouter = router({
             }
           })
         ),
-        projectRaw.mentorAssignment
-          ? (async () => ({
-              ...projectRaw.mentorAssignment!,
-              mentor: {
-                ...projectRaw.mentorAssignment!.mentor,
-                avatarUrl: await getUserAvatarUrl(
-                  projectRaw.mentorAssignment!.mentor.profileImageKey,
-                  projectRaw.mentorAssignment!.mentor.profileImageProvider
-                ),
-              },
-            }))()
-          : Promise.resolve(null),
+        // TODO(PR8 Task 8): surface all mentors. Legacy shape — pick the first.
+        (async () => {
+          const primaryMa = projectRaw.mentorAssignments[0] ?? null
+          if (!primaryMa) return null
+          return {
+            ...primaryMa,
+            mentor: {
+              ...primaryMa.mentor,
+              avatarUrl: await getUserAvatarUrl(
+                primaryMa.mentor.profileImageKey,
+                primaryMa.mentor.profileImageProvider
+              ),
+            },
+          }
+        })(),
       ])
 
       return {

src/server/routers/round.ts

@@ -236,7 +236,7 @@ export const roundRouter = router({
         where: {
           roundId: input.roundId,
           project: {
-            mentorAssignment: null,
+            mentorAssignments: { none: {} },
             ...(eligibility === 'requested_only' ? { wantsMentorship: true } : {}),
           },
         },

src/server/services/mentor-workspace.ts

@@ -152,6 +152,11 @@ export async function markRead(
 
 /**
  * Record a file upload in a workspace.
+ *
+ * `workspaceId` is the originating MentorAssignment id (kept on the row as an
+ * audit-trail FK). We derive the project id from that assignment so the file
+ * is bound to the project — meaning any co-mentor on the project can see/use
+ * it, and the row survives if this particular assignment is later dropped.
  */
 export async function uploadFile(
   params: {
@@ -180,6 +185,7 @@ export async function uploadFile(
 
   return prisma.mentorFile.create({
     data: {
+      projectId: assignment.projectId,
       mentorAssignmentId: params.workspaceId,
       uploadedByUserId: params.uploadedByUserId,
       fileName: params.fileName,
@@ -238,9 +244,6 @@ export async function promoteFile(
   try {
     const file = await prisma.mentorFile.findUnique({
       where: { id: params.mentorFileId },
-      include: {
-        mentorAssignment: { select: { projectId: true } },
-      },
     })
 
     if (!file) {
@@ -265,7 +268,7 @@ export async function promoteFile(
       // Create promotion event
       await tx.submissionPromotionEvent.create({
         data: {
-          projectId: file.mentorAssignment.projectId,
+          projectId: file.projectId,
           roundId: params.roundId,
           slotKey: params.slotKey,
           sourceType: 'MENTOR_FILE',
@@ -281,7 +284,7 @@ export async function promoteFile(
           entityId: params.mentorFileId,
           actorId: params.promotedById,
           detailsJson: {
-            projectId: file.mentorAssignment.projectId,
+            projectId: file.projectId,
             roundId: params.roundId,
             slotKey: params.slotKey,
             fileName: file.fileName,
@@ -297,7 +300,7 @@ export async function promoteFile(
         entityType: 'MentorFile',
         entityId: params.mentorFileId,
         detailsJson: {
-          projectId: file.mentorAssignment.projectId,
+          projectId: file.projectId,
           slotKey: params.slotKey,
         },
       })
@@ -314,14 +317,17 @@ export async function promoteFile(
 }
 
 /**
- * List files for a workspace, newest first, with comment counts and uploader.
+ * List files for a project, newest first, with comment counts and uploader.
+ * Project-scoped: every mentor assigned to the project (and every team member)
+ * sees the same file list, even if some files were uploaded under a now-dropped
+ * assignment.
  */
 export async function getFiles(
-  workspaceId: string,
+  projectId: string,
   prisma: PrismaClient,
 ) {
   return prisma.mentorFile.findMany({
-    where: { mentorAssignmentId: workspaceId },
+    where: { projectId },
     orderBy: { createdAt: 'desc' },
     include: {
       uploadedBy: { select: { id: true, name: true, email: true } },
@@ -331,8 +337,10 @@ export async function getFiles(
 }
 
 /**
- * Delete a file. Caller must be either the uploader OR the assigned mentor.
- * Removes the MinIO object and the DB row + cascade-deletes comments.
+ * Delete a file. Caller must be either the uploader, OR any mentor currently
+ * assigned (not dropped) to the file's project, OR a team member of the
+ * file's project. Removes the MinIO object and the DB row + cascade-deletes
+ * comments.
  */
 export async function deleteFile(
   params: { mentorFileId: string; userId: string },
@@ -341,13 +349,30 @@ export async function deleteFile(
 ): Promise<void> {
   const file = await prisma.mentorFile.findUnique({
     where: { id: params.mentorFileId },
-    include: { mentorAssignment: { select: { mentorId: true } } },
   })
   if (!file) throw new Error('File not found')
   const isUploader = file.uploadedByUserId === params.userId
-  const isMentor = file.mentorAssignment.mentorId === params.userId
-  if (!isUploader && !isMentor) {
-    throw new Error('Only the uploader or the assigned mentor can delete this file')
+  let isAuthorized = isUploader
+  if (!isAuthorized) {
+    const mentorAssignment = await prisma.mentorAssignment.findFirst({
+      where: { projectId: file.projectId, mentorId: params.userId, droppedAt: null },
+      select: { id: true },
+    })
+    if (mentorAssignment) {
+      isAuthorized = true
+    }
+  }
+  if (!isAuthorized) {
+    const teamMembership = await prisma.teamMember.findFirst({
+      where: { projectId: file.projectId, userId: params.userId },
+      select: { id: true },
+    })
+    if (teamMembership) {
+      isAuthorized = true
+    }
+  }
+  if (!isAuthorized) {
+    throw new Error('Only the uploader, an assigned mentor, or a team member can delete this file')
   }
   try {
     await removeStorageObject(file.bucket, file.objectKey)

src/server/services/smart-assignment.ts

@@ -670,7 +670,7 @@ export async function getMentorSuggestionsForProject(
       projectTags: {
         include: { tag: true },
       },
-      mentorAssignment: true,
+      mentorAssignments: true,
     },
   })
 
@@ -714,7 +714,7 @@ export async function getMentorSuggestionsForProject(
 
   for (const mentor of mentors) {
     // Skip if already assigned to this project
-    if (project.mentorAssignment?.mentorId === mentor.id) {
+    if (project.mentorAssignments.some((ma) => ma.mentorId === mentor.id)) {
       continue
     }
 

tailwind.config.ts

@@ -1,7 +1,6 @@
 import type { Config } from 'tailwindcss'
 
 const config: Config = {
-  darkMode: 'class',
   content: [
     './src/pages/**/*.{js,ts,jsx,tsx,mdx}',
     './src/components/**/*.{js,ts,jsx,tsx,mdx}',

tests/integration/mentor-file-scope.test.ts

@@ -0,0 +1,138 @@
+/**
+ * PR8 — MentorFile schema invariant check
+ *
+ * The actual data migration (backfill of MentorFile.projectId from the
+ * originating MentorAssignment.projectId) was verified against the May 7
+ * production database dump in Task 2 of PR8. This file is a complementary
+ * schema-invariant check that runs against the current dev DB:
+ *
+ *   1. MentorFile.projectId is now a required column (Prisma validation fails
+ *      when omitted).
+ *   2. Files are scoped to the project, not to a single MentorAssignment —
+ *      deleting the originating assignment leaves the file in place with
+ *      mentorAssignmentId set to NULL (FK SetNull) and projectId unchanged.
+ *      This is what enables team-wide file visibility across co-mentors.
+ */
+
+import { afterAll, describe, expect, it } from 'vitest'
+import { prisma } from '../setup'
+import {
+  createTestUser,
+  createTestProgram,
+  createTestProject,
+  cleanupTestData,
+  uid,
+} from '../helpers'
+
+describe('MentorFile scope invariants (PR8 schema)', () => {
+  const programIds: string[] = []
+  const userIds: string[] = []
+  const mentorFileIds: string[] = []
+
+  afterAll(async () => {
+    if (mentorFileIds.length > 0) {
+      await prisma.mentorFile.deleteMany({ where: { id: { in: mentorFileIds } } })
+    }
+    for (const programId of programIds) {
+      await prisma.mentorAssignment.deleteMany({ where: { project: { programId } } })
+      await prisma.mentorFile.deleteMany({ where: { project: { programId } } })
+      await cleanupTestData(programId, [])
+    }
+    if (userIds.length > 0) {
+      await prisma.user.deleteMany({ where: { id: { in: userIds } } })
+    }
+  })
+
+  it('MentorFile.projectId matches MentorAssignment.projectId when created via the workspace path', async () => {
+    const program = await createTestProgram({ name: `mfscope-match-${uid()}` })
+    programIds.push(program.id)
+    const project = await createTestProject(program.id, { title: 'Scope Match' })
+    const mentor = await createTestUser('MENTOR')
+    userIds.push(mentor.id)
+
+    const assignment = await prisma.mentorAssignment.create({
+      data: {
+        projectId: project.id,
+        mentorId: mentor.id,
+        method: 'MANUAL',
+        workspaceEnabled: true,
+      },
+    })
+
+    const file = await prisma.mentorFile.create({
+      data: {
+        projectId: project.id,
+        mentorAssignmentId: assignment.id,
+        uploadedByUserId: mentor.id,
+        fileName: 'invariant.pdf',
+        mimeType: 'application/pdf',
+        size: 1024,
+        bucket: 'mopc-files',
+        objectKey: `Scope_Match/mentorship/${Date.now()}-invariant.pdf`,
+      },
+    })
+    mentorFileIds.push(file.id)
+
+    expect(file.projectId).toBe(assignment.projectId)
+  })
+
+  it('creating a MentorFile without a projectId is rejected by Prisma', async () => {
+    const program = await createTestProgram({ name: `mfscope-noproj-${uid()}` })
+    programIds.push(program.id)
+    const mentor = await createTestUser('MENTOR')
+    userIds.push(mentor.id)
+
+    // `projectId` is required in the schema — Prisma should reject this.
+    // Cast away the type for the deliberate omission.
+    await expect(
+      prisma.mentorFile.create({
+        data: {
+          uploadedByUserId: mentor.id,
+          fileName: 'no-project.pdf',
+          mimeType: 'application/pdf',
+          size: 10,
+          bucket: 'mopc-files',
+          objectKey: 'orphan/no-project.pdf',
+        } as unknown as Parameters<typeof prisma.mentorFile.create>[0]['data'],
+      }),
+    ).rejects.toThrow()
+  })
+
+  it('dropping the originating MentorAssignment leaves the MentorFile in place (SetNull)', async () => {
+    const program = await createTestProgram({ name: `mfscope-setnull-${uid()}` })
+    programIds.push(program.id)
+    const project = await createTestProject(program.id, { title: 'SetNull Project' })
+    const mentor = await createTestUser('MENTOR')
+    userIds.push(mentor.id)
+
+    const assignment = await prisma.mentorAssignment.create({
+      data: {
+        projectId: project.id,
+        mentorId: mentor.id,
+        method: 'MANUAL',
+        workspaceEnabled: true,
+      },
+    })
+
+    const file = await prisma.mentorFile.create({
+      data: {
+        projectId: project.id,
+        mentorAssignmentId: assignment.id,
+        uploadedByUserId: mentor.id,
+        fileName: 'survives-drop.pdf',
+        mimeType: 'application/pdf',
+        size: 2048,
+        bucket: 'mopc-files',
+        objectKey: `SetNull_Project/mentorship/${Date.now()}-survives.pdf`,
+      },
+    })
+    mentorFileIds.push(file.id)
+
+    await prisma.mentorAssignment.delete({ where: { id: assignment.id } })
+
+    const after = await prisma.mentorFile.findUnique({ where: { id: file.id } })
+    expect(after).not.toBeNull()
+    expect(after?.mentorAssignmentId).toBeNull()
+    expect(after?.projectId).toBe(project.id)
+  })
+})

tests/unit/mentor-assignment-ux.test.ts

@@ -213,12 +213,12 @@ describe('mentor.autoAssignBulkForRound', () => {
 
     expect(result.assigned).toBe(1)
 
-    const requestedAssigned = await prisma.mentorAssignment.findUnique({
+    const requestedAssigned = await prisma.mentorAssignment.findFirst({
       where: { projectId: projWithRequest.id },
     })
     expect(requestedAssigned).not.toBeNull()
 
-    const skippedNotAssigned = await prisma.mentorAssignment.findUnique({
+    const skippedNotAssigned = await prisma.mentorAssignment.findFirst({
       where: { projectId: projWithoutRequest.id },
     })
     expect(skippedNotAssigned).toBeNull()
@@ -291,7 +291,7 @@ describe('mentor.autoAssignBulkForRound', () => {
     expect(result.assigned).toBe(1)
     expect(result.skipped).toBe(1)
 
-    const stillExisting = await prisma.mentorAssignment.findUnique({
+    const stillExisting = await prisma.mentorAssignment.findFirst({
       where: { projectId: projAlreadyAssigned.id },
     })
     expect(stillExisting?.mentorId).toBe(existingMentor.id) // unchanged
@@ -377,17 +377,17 @@ describe('mentor.autoAssignBulkForRound', () => {
 
     expect(result.assigned).toBe(1)
 
-    const confirmedAssigned = await prisma.mentorAssignment.findUnique({
+    const confirmedAssigned = await prisma.mentorAssignment.findFirst({
       where: { projectId: projConfirmed.id },
     })
     expect(confirmedAssigned).not.toBeNull()
 
-    const pendingAssigned = await prisma.mentorAssignment.findUnique({
+    const pendingAssigned = await prisma.mentorAssignment.findFirst({
       where: { projectId: projPending.id },
     })
     expect(pendingAssigned).toBeNull()
 
-    const noConfAssigned = await prisma.mentorAssignment.findUnique({
+    const noConfAssigned = await prisma.mentorAssignment.findFirst({
       where: { projectId: projNoConfirmation.id },
     })
     expect(noConfAssigned).toBeNull()

tests/unit/mentor-round-stats.test.ts

@@ -92,6 +92,7 @@ describe('mentor.getRoundStats', () => {
     })
     await prisma.mentorFile.create({
       data: {
+        projectId: projReqAssigned.id,
         mentorAssignmentId: a1.id,
         uploadedByUserId: mentor.id,
         fileName: 'plan.pdf',

tests/unit/mentor-upload-token.test.ts

@@ -6,6 +6,7 @@ import {
 
 const samplePayload: MentorUploadPayload = {
   mentorAssignmentId: 'ma-123',
+  projectId: 'proj-789',
   uploaderUserId: 'user-456',
   fileName: 'doc.pdf',
   mimeType: 'application/pdf',

tests/unit/mentor-workspace-files.test.ts

@@ -8,6 +8,7 @@ import { signMentorUploadToken } from '../../src/lib/mentor-upload-token'
 
 describe('mentor.workspace files end-to-end', () => {
   let programId: string
+  let projectId: string
   let mentor: { id: string; email: string; role: 'MENTOR' }
   let outsider: { id: string; email: string; role: 'JURY_MEMBER' }
   let assignmentId: string
@@ -18,6 +19,7 @@ describe('mentor.workspace files end-to-end', () => {
     const program = await createTestProgram({ name: `mentor-files-${uid()}` })
     programId = program.id
     const project = await createTestProject(programId, { title: 'Test Project' })
+    projectId = project.id
 
     const m = await createTestUser('MENTOR')
     userIds.push(m.id)
@@ -79,6 +81,7 @@ describe('mentor.workspace files end-to-end', () => {
   it('rejects workspaceUploadFile with a token whose uploader differs from the caller', async () => {
     const forged = signMentorUploadToken({
       mentorAssignmentId: assignmentId,
+      projectId,
       uploaderUserId: 'someone-else',
       fileName: 'x.pdf', mimeType: 'application/pdf', size: 1,
       bucket: 'mopc-files', objectKey: 'a/mentorship/0-x.pdf',
@@ -94,7 +97,7 @@ describe('mentor.workspace files end-to-end', () => {
       mentorAssignmentId: assignmentId, fileName: 'b.pdf', mimeType: 'application/pdf', size: 50,
     })
     await caller.workspaceUploadFile({ uploadToken: a.uploadToken })
-    const files = await caller.workspaceGetFiles({ mentorAssignmentId: assignmentId })
+    const files = await caller.workspaceGetFiles({ projectId })
     expect(files.length).toBeGreaterThanOrEqual(2)
     expect(new Date(files[0].createdAt).getTime()).toBeGreaterThanOrEqual(
       new Date(files[1].createdAt).getTime(),
@@ -104,7 +107,7 @@ describe('mentor.workspace files end-to-end', () => {
   it('refuses workspaceGetFiles to outsiders', async () => {
     const caller = createCaller(mentorRouter, outsider)
     await expect(
-      caller.workspaceGetFiles({ mentorAssignmentId: assignmentId })
+      caller.workspaceGetFiles({ projectId })
     ).rejects.toThrow(/FORBIDDEN|not a member/i)
   })
 

tests/unit/multi-mentor-assignment.test.ts

@@ -0,0 +1,509 @@
+/**
+ * PR8 — Multi-mentor stacking + change-request procedures
+ *
+ * Covers the API surface added by PR8 Tasks 4 + 6:
+ *   - mentor.assign: per-team stacking, P2002 on duplicate (projectId, mentorId),
+ *     idempotent per-row email notification (via MentorAssignment.notificationSentAt),
+ *     re-assignment after drop creates a new row and re-fires the email.
+ *   - mentor.requestChange: auth (team-member or admin), validation, single open
+ *     request per (user, project), target-assignment cross-project guard.
+ *   - mentor.listChangeRequests: admin-only, PENDING-first ordering.
+ *   - mentor.resolveChangeRequest: admin-only, BAD_REQUEST on already-resolved.
+ */
+
+import { afterAll, describe, expect, it } from 'vitest'
+import { prisma, createCaller } from '../setup'
+import {
+  createTestUser,
+  createTestProgram,
+  createTestProject,
+  cleanupTestData,
+  uid,
+} from '../helpers'
+import { mentorRouter } from '../../src/server/routers/mentor'
+import type { UserRole } from '@prisma/client'
+
+async function createUserWithRoles(
+  primaryRole: UserRole,
+  rolesArray: UserRole[],
+  overrides: { name?: string; expertiseTags?: string[] } = {},
+) {
+  const id = uid('user')
+  return prisma.user.create({
+    data: {
+      id,
+      email: `${id}@test.local`,
+      name: overrides.name ?? `Test ${primaryRole}`,
+      role: primaryRole,
+      roles: rolesArray,
+      status: 'ACTIVE',
+      expertiseTags: overrides.expertiseTags ?? [],
+    },
+  })
+}
+
+describe('mentor.assign — stacking + per-team email idempotency', () => {
+  const programIds: string[] = []
+  const userIds: string[] = []
+
+  afterAll(async () => {
+    for (const programId of programIds) {
+      await prisma.mentorAssignment.deleteMany({ where: { project: { programId } } })
+      await cleanupTestData(programId, [])
+    }
+    if (userIds.length > 0) {
+      await prisma.user.deleteMany({ where: { id: { in: userIds } } })
+    }
+  })
+
+  it('stacks two different mentors on the same project (both rows active)', async () => {
+    const admin = await createTestUser('SUPER_ADMIN')
+    userIds.push(admin.id)
+    const program = await createTestProgram({ name: `assign-stack-${uid()}` })
+    programIds.push(program.id)
+    const project = await createTestProject(program.id, { title: 'Stacking Project' })
+
+    const m1 = await createUserWithRoles('MENTOR', ['MENTOR'], { name: 'M1' })
+    const m2 = await createUserWithRoles('MENTOR', ['MENTOR'], { name: 'M2' })
+    userIds.push(m1.id, m2.id)
+
+    const caller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+    const a1 = await caller.assign({ projectId: project.id, mentorId: m1.id })
+    const a2 = await caller.assign({ projectId: project.id, mentorId: m2.id })
+
+    expect(a1.id).not.toBe(a2.id)
+    expect(a1.mentorId).toBe(m1.id)
+    expect(a2.mentorId).toBe(m2.id)
+
+    const rows = await prisma.mentorAssignment.findMany({
+      where: { projectId: project.id },
+      orderBy: { assignedAt: 'asc' },
+    })
+    expect(rows).toHaveLength(2)
+    expect(rows.every((r) => r.droppedAt === null)).toBe(true)
+  })
+
+  it('rejects duplicate (projectId, mentorId) pair with CONFLICT', async () => {
+    const admin = await createTestUser('SUPER_ADMIN')
+    userIds.push(admin.id)
+    const program = await createTestProgram({ name: `assign-dup-${uid()}` })
+    programIds.push(program.id)
+    const project = await createTestProject(program.id, { title: 'Dup Project' })
+    const mentor = await createUserWithRoles('MENTOR', ['MENTOR'])
+    userIds.push(mentor.id)
+
+    const caller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+
+    await caller.assign({ projectId: project.id, mentorId: mentor.id })
+    await expect(
+      caller.assign({ projectId: project.id, mentorId: mentor.id }),
+    ).rejects.toThrow(/already assigned/i)
+  })
+
+  it('stamps notificationSentAt on first assignment; fires fresh email when same mentor is added to a different project', async () => {
+    const admin = await createTestUser('SUPER_ADMIN')
+    userIds.push(admin.id)
+    const program = await createTestProgram({ name: `assign-email-${uid()}` })
+    programIds.push(program.id)
+    const project1 = await createTestProject(program.id, { title: 'Project Alpha' })
+    const project2 = await createTestProject(program.id, { title: 'Project Beta' })
+    const mentor = await createUserWithRoles('MENTOR', ['MENTOR'])
+    userIds.push(mentor.id)
+
+    const caller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+
+    const a1 = await caller.assign({ projectId: project1.id, mentorId: mentor.id })
+    const a2 = await caller.assign({ projectId: project2.id, mentorId: mentor.id })
+
+    // assign() returns the row before the post-write stamp; re-read for the
+    // current value.
+    const row1 = await prisma.mentorAssignment.findUnique({ where: { id: a1.id } })
+    const row2 = await prisma.mentorAssignment.findUnique({ where: { id: a2.id } })
+
+    expect(row1?.notificationSentAt).not.toBeNull()
+    expect(row2?.notificationSentAt).not.toBeNull()
+    // Each row carries its own timestamp — they're independent.
+    expect(row1?.id).not.toBe(row2?.id)
+  })
+
+  it('stamps notificationSentAt independently for each co-mentor on the same project', async () => {
+    const admin = await createTestUser('SUPER_ADMIN')
+    userIds.push(admin.id)
+    const program = await createTestProgram({ name: `assign-comentor-${uid()}` })
+    programIds.push(program.id)
+    const project = await createTestProject(program.id, { title: 'Co-mentor Project' })
+    const m1 = await createUserWithRoles('MENTOR', ['MENTOR'], { name: 'Co-1' })
+    const m2 = await createUserWithRoles('MENTOR', ['MENTOR'], { name: 'Co-2' })
+    userIds.push(m1.id, m2.id)
+
+    const caller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+    const a1 = await caller.assign({ projectId: project.id, mentorId: m1.id })
+    const a2 = await caller.assign({ projectId: project.id, mentorId: m2.id })
+
+    const row1 = await prisma.mentorAssignment.findUnique({ where: { id: a1.id } })
+    const row2 = await prisma.mentorAssignment.findUnique({ where: { id: a2.id } })
+
+    expect(row1?.notificationSentAt).not.toBeNull()
+    expect(row2?.notificationSentAt).not.toBeNull()
+  })
+
+  it('after a mentor is dropped (assignment row deleted), re-assigning creates a fresh row with a new notificationSentAt', async () => {
+    const admin = await createTestUser('SUPER_ADMIN')
+    userIds.push(admin.id)
+    const program = await createTestProgram({ name: `assign-redrop-${uid()}` })
+    programIds.push(program.id)
+    const project = await createTestProject(program.id, { title: 'Re-assign Project' })
+    const mentor = await createUserWithRoles('MENTOR', ['MENTOR'])
+    userIds.push(mentor.id)
+
+    const caller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+
+    const a1 = await caller.assign({ projectId: project.id, mentorId: mentor.id })
+    const stamp1 = (
+      await prisma.mentorAssignment.findUnique({ where: { id: a1.id } })
+    )?.notificationSentAt
+    expect(stamp1).not.toBeNull()
+
+    // Hard-delete the first row (simulates a "fully dropped → repository clean"
+    // state — the unique constraint also blocks any re-assign while the row
+    // exists, so the row must go away).
+    await prisma.mentorAssignment.delete({ where: { id: a1.id } })
+
+    // Re-assign: new row, new notificationSentAt stamp.
+    const a2 = await caller.assign({ projectId: project.id, mentorId: mentor.id })
+    const stamp2 = (
+      await prisma.mentorAssignment.findUnique({ where: { id: a2.id } })
+    )?.notificationSentAt
+
+    expect(a2.id).not.toBe(a1.id)
+    expect(stamp2).not.toBeNull()
+  })
+})
+
+describe('mentor.requestChange / listChangeRequests / resolveChangeRequest', () => {
+  const programIds: string[] = []
+  const userIds: string[] = []
+
+  afterAll(async () => {
+    for (const programId of programIds) {
+      await prisma.mentorChangeRequest.deleteMany({ where: { project: { programId } } })
+      await prisma.mentorAssignment.deleteMany({ where: { project: { programId } } })
+      await prisma.teamMember.deleteMany({ where: { project: { programId } } })
+      await cleanupTestData(programId, [])
+    }
+    if (userIds.length > 0) {
+      await prisma.user.deleteMany({ where: { id: { in: userIds } } })
+    }
+  })
+
+  /**
+   * Builds a project with a LEAD team member (applicant), an unrelated
+   * non-team-member (applicant), and an admin. Returns the IDs.
+   */
+  async function setupProjectWithTeam(label: string) {
+    const admin = await createTestUser('SUPER_ADMIN', { name: `Admin ${label}` })
+    userIds.push(admin.id)
+    const program = await createTestProgram({ name: `${label}-${uid()}` })
+    programIds.push(program.id)
+    const project = await createTestProject(program.id, { title: `Project ${label}` })
+    const teamMember = await createUserWithRoles('APPLICANT', ['APPLICANT'], {
+      name: `Team ${label}`,
+    })
+    const outsider = await createUserWithRoles('APPLICANT', ['APPLICANT'], {
+      name: `Outsider ${label}`,
+    })
+    userIds.push(teamMember.id, outsider.id)
+    await prisma.teamMember.create({
+      data: {
+        projectId: project.id,
+        userId: teamMember.id,
+        role: 'LEAD',
+      },
+    })
+    return { admin, program, project, teamMember, outsider }
+  }
+
+  it('team member can open a change request (PENDING)', async () => {
+    const { project, teamMember } = await setupProjectWithTeam('rc-teamok')
+    const caller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    const created = await caller.requestChange({
+      projectId: project.id,
+      reason: 'We would like a mentor with deeper marine biology experience.',
+    })
+    expect(created.status).toBe('PENDING')
+
+    const persisted = await prisma.mentorChangeRequest.findUnique({
+      where: { id: created.id },
+    })
+    expect(persisted?.requestedByUserId).toBe(teamMember.id)
+    expect(persisted?.projectId).toBe(project.id)
+  })
+
+  it('non-team-member non-admin is rejected with FORBIDDEN', async () => {
+    const { project, outsider } = await setupProjectWithTeam('rc-outsider')
+    const caller = createCaller(mentorRouter, {
+      id: outsider.id,
+      email: outsider.email,
+      role: 'APPLICANT',
+    })
+    await expect(
+      caller.requestChange({
+        projectId: project.id,
+        reason: 'I have no business asking for this.',
+      }),
+    ).rejects.toThrow(/FORBIDDEN|not a member/i)
+  })
+
+  it('admin (no team membership) can open a change request', async () => {
+    const { admin, project } = await setupProjectWithTeam('rc-admin')
+    const caller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+    const created = await caller.requestChange({
+      projectId: project.id,
+      reason: 'Admin-initiated mentor swap due to internal escalation.',
+    })
+    expect(created.status).toBe('PENDING')
+  })
+
+  it('reason < 10 chars is rejected (Zod validation)', async () => {
+    const { project, teamMember } = await setupProjectWithTeam('rc-short')
+    const caller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    await expect(
+      caller.requestChange({ projectId: project.id, reason: 'too short' }),
+    ).rejects.toThrow()
+  })
+
+  it('opening a second request while the first is still PENDING throws CONFLICT', async () => {
+    const { project, teamMember } = await setupProjectWithTeam('rc-conflict')
+    const caller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    await caller.requestChange({
+      projectId: project.id,
+      reason: 'First request — still pending please review.',
+    })
+    await expect(
+      caller.requestChange({
+        projectId: project.id,
+        reason: 'Second request while first is open.',
+      }),
+    ).rejects.toThrow(/already.*open|CONFLICT/i)
+  })
+
+  it('after the first request is resolved, the same user can open a new one', async () => {
+    const { admin, project, teamMember } = await setupProjectWithTeam('rc-reopen')
+    const teamCaller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    const adminCaller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+
+    const first = await teamCaller.requestChange({
+      projectId: project.id,
+      reason: 'First request — please address my concerns.',
+    })
+    await adminCaller.resolveChangeRequest({
+      id: first.id,
+      status: 'RESOLVED',
+      resolutionNote: 'Mentor swapped.',
+    })
+
+    const second = await teamCaller.requestChange({
+      projectId: project.id,
+      reason: 'Second request — new concern after resolution.',
+    })
+    expect(second.status).toBe('PENDING')
+    expect(second.id).not.toBe(first.id)
+  })
+
+  it('targetAssignmentId belonging to a different project is rejected with BAD_REQUEST', async () => {
+    const { admin, project: projectA, teamMember } = await setupProjectWithTeam('rc-crossproj')
+    // Make a second project + mentor assignment NOT on the requester's project.
+    const otherProgram = await createTestProgram({ name: `rc-other-${uid()}` })
+    programIds.push(otherProgram.id)
+    const otherProject = await createTestProject(otherProgram.id, { title: 'Other proj' })
+    const mentor = await createUserWithRoles('MENTOR', ['MENTOR'])
+    userIds.push(mentor.id)
+    const foreignAssignment = await prisma.mentorAssignment.create({
+      data: {
+        projectId: otherProject.id,
+        mentorId: mentor.id,
+        method: 'MANUAL',
+        assignedBy: admin.id,
+      },
+    })
+
+    const caller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    await expect(
+      caller.requestChange({
+        projectId: projectA.id,
+        targetAssignmentId: foreignAssignment.id,
+        reason: 'Trying to point at a foreign assignment row.',
+      }),
+    ).rejects.toThrow(/does not belong|BAD_REQUEST/i)
+  })
+
+  it('listChangeRequests is FORBIDDEN for applicant', async () => {
+    const { project, teamMember } = await setupProjectWithTeam('rc-list-forbidden')
+    const teamCaller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    await teamCaller.requestChange({
+      projectId: project.id,
+      reason: 'A real request, but list should still be admin-only.',
+    })
+    await expect(teamCaller.listChangeRequests({})).rejects.toThrow()
+  })
+
+  it('listChangeRequests returns PENDING rows before non-PENDING rows', async () => {
+    const { admin, project, teamMember } = await setupProjectWithTeam('rc-list-order')
+    const teamCaller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    const adminCaller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+
+    // Create two requests: open one, resolve it; open a second one (still PENDING).
+    const resolvedReq = await teamCaller.requestChange({
+      projectId: project.id,
+      reason: 'Will be resolved before the second request opens.',
+    })
+    await adminCaller.resolveChangeRequest({
+      id: resolvedReq.id,
+      status: 'RESOLVED',
+    })
+    const pendingReq = await teamCaller.requestChange({
+      projectId: project.id,
+      reason: 'Still pending — should be listed first.',
+    })
+
+    const rows = (await adminCaller.listChangeRequests({ projectId: project.id })) as Array<{
+      id: string
+      status: string
+    }>
+    const ids = rows.map((r) => r.id)
+    // PENDING must come before RESOLVED in the listing.
+    expect(ids.indexOf(pendingReq.id)).toBeLessThan(ids.indexOf(resolvedReq.id))
+    expect(rows[0].status).toBe('PENDING')
+  })
+
+  it('resolveChangeRequest sets resolvedBy/resolvedAt/resolutionNote', async () => {
+    const { admin, project, teamMember } = await setupProjectWithTeam('rc-resolve')
+    const teamCaller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    const adminCaller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+
+    const req = await teamCaller.requestChange({
+      projectId: project.id,
+      reason: 'Please resolve this request.',
+    })
+    const result = await adminCaller.resolveChangeRequest({
+      id: req.id,
+      status: 'RESOLVED',
+      resolutionNote: 'Replacement mentor assigned.',
+    })
+    expect(result.status).toBe('RESOLVED')
+    expect(result.resolvedByUserId).toBe(admin.id)
+    expect(result.resolvedAt).not.toBeNull()
+    expect(result.resolutionNote).toBe('Replacement mentor assigned.')
+  })
+
+  it('resolveChangeRequest by non-admin is FORBIDDEN', async () => {
+    const { admin, project, teamMember } = await setupProjectWithTeam('rc-resolve-forbid')
+    const teamCaller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    const adminCaller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+    const req = await adminCaller.requestChange({
+      projectId: project.id,
+      reason: 'Admin opens, applicant should not resolve.',
+    })
+    await expect(
+      teamCaller.resolveChangeRequest({ id: req.id, status: 'RESOLVED' }),
+    ).rejects.toThrow()
+  })
+
+  it('resolveChangeRequest on an already-resolved request throws BAD_REQUEST', async () => {
+    const { admin, project, teamMember } = await setupProjectWithTeam('rc-resolve-twice')
+    const teamCaller = createCaller(mentorRouter, {
+      id: teamMember.id,
+      email: teamMember.email,
+      role: 'APPLICANT',
+    })
+    const adminCaller = createCaller(mentorRouter, {
+      id: admin.id,
+      email: admin.email,
+      role: 'SUPER_ADMIN',
+    })
+    const req = await teamCaller.requestChange({
+      projectId: project.id,
+      reason: 'Will resolve, then try to resolve again.',
+    })
+    await adminCaller.resolveChangeRequest({ id: req.id, status: 'RESOLVED' })
+    await expect(
+      adminCaller.resolveChangeRequest({ id: req.id, status: 'DISMISSED' }),
+    ).rejects.toThrow(/already resolved|BAD_REQUEST/i)
+  })
+})