Comprehensive round system audit: fix 27 logic bugs, add manual project/assignment features, improve UI/UX

## Critical Logic Fixes (Tier 1)
- Fix requiredReviews config key mismatch (always defaulted to 3)
- Fix double-email + stageName/roundName metadata mismatch in notifications
- Fix snake_case config reads in peer review (peerReviewEnabled was always blocked)
- Add server-side COI check to evaluation submit (was client-only)
- Fix hard-coded feedbackText.min(10) — now uses config values
- Fix binaryDecision corruption in non-binary scoring modes
- Fix advanceProjects: add competition/sort-order/status validations, move autoPass into tx
- Fix removeFromRound: now cleans up orphaned Assignment records
- Fix 3-day reminder sending wrong email template (was using 24h template)

## High-Priority Logic Fixes (Tier 2)
- Add project state transition whitelist (prevent invalid transitions like REJECTED→PASSED)
- Scope AI assignment job to jury group members (was querying all JURY_MEMBERs)
- Add COI awareness to AI assignment generation
- Enforce requireAllCriteriaScored server-side
- Fix expireIntentsForRound nested transaction (now uses caller's tx)
- Implement notifyOnEntry for advancement path
- Implement notifyOnAdvance (was dead config)
- Fix checkRequirementsAndTransition for SubmissionFileRequirement model

## New Features (Tier 3)
- Add Project to Round: dialog with "Create New" and "From Pool" tabs
- Assignment "By Project" mode: select project → assign multiple jurors
- Backend: project.createAndAssignToRound procedure

## UI/UX Improvements (Tier 4+5)
- Add AlertDialog confirmation to header status dropdown
- Replace native confirm() with AlertDialog in assignments table
- Jury stats card now display-only with "Change" link
- Assignments tab restructured into logical card groups
- Inline-editable round name in header
- Back button shows destination label
- Readiness checklist: green check instead of strikethrough
- Gate assignments tab when no jury group assigned
- Relative time on window stats card
- Toast feedback on date saves
- Disable advance button when no target round
- COI section shows placeholder when empty
- Round position shown as "Round X of Y"
- InlineMemberCap edit icon always visible
- Status badge tooltip with description
- Add REMINDER_3_DAYS email template
- Fix maybeSendEmail to respect notification preferences
- Optimize bulk notification email loop

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/server/routers/roundEngine.ts

@@ -105,6 +105,7 @@ export const roundEngineRouter = router({
         input.newState,
         ctx.user.id,
         ctx.prisma,
+        { adminOverride: true },
       )
       if (!result.success) {
         throw new TRPCError({
@@ -133,6 +134,7 @@ export const roundEngineRouter = router({
         input.newState,
         ctx.user.id,
         ctx.prisma,
+        { adminOverride: true },
       )
     }),
 
@@ -188,6 +190,14 @@ export const roundEngineRouter = router({
 
       const roundIds = roundsToRemoveFrom.map((r) => r.id)
 
+      // Delete Assignment records first (Prisma cascade handles Evaluations)
+      await ctx.prisma.assignment.deleteMany({
+        where: {
+          projectId: input.projectId,
+          roundId: { in: roundIds },
+        },
+      })
+
       // Delete ProjectRoundState entries for this project in all affected rounds
       const deleted = await ctx.prisma.projectRoundState.deleteMany({
         where: {
@@ -238,6 +248,14 @@ export const roundEngineRouter = router({
 
       const roundIds = roundsToRemoveFrom.map((r) => r.id)
 
+      // Delete Assignment records first (Prisma cascade handles Evaluations)
+      await ctx.prisma.assignment.deleteMany({
+        where: {
+          projectId: { in: input.projectIds },
+          roundId: { in: roundIds },
+        },
+      })
+
       const deleted = await ctx.prisma.projectRoundState.deleteMany({
         where: {
           projectId: { in: input.projectIds },