feat(user): context-aware default dashboard (§D.1)

user.getDefaultDashboard returns the highest-priority role for which the
user has actionable work right now — pending eval in active round, active
mentoring assignment, applicant project in active round, etc. — falling
back to static priority order if nothing is actionable.

src/app/page.tsx now reads roles[] (multi-role array) instead of just the
primary role, fixing the bug where mentor+juror users always landed on
their primary role's dashboard. Uses static priority for simplicity in
the server component; the context-aware procedure remains available for
client surfaces.

Tests cover six cases: super-admin, juror with active eval, juror+observer
fallback, mentor+juror in mentoring round, both-active-priority-tiebreak,
observer-only.

Plan: docs/superpowers/plans/2026-04-28-pr6-multi-role-and-workspace-previews.md

tests/unit/default-dashboard.test.ts

@@ -0,0 +1,150 @@
+import { afterAll, describe, expect, it } from 'vitest'
+import { prisma, createCaller } from '../setup'
+import {
+  createTestUser,
+  createTestProgram,
+  createTestProject,
+  createTestCompetition,
+  createTestRound,
+  createTestProjectRoundState,
+  cleanupTestData,
+  uid,
+} from '../helpers'
+import { userRouter } from '../../src/server/routers/user'
+import type { UserRole } from '@prisma/client'
+
+async function createUserWithRoles(primaryRole: UserRole, rolesArray: UserRole[]) {
+  const id = uid('user')
+  return prisma.user.create({
+    data: {
+      id,
+      email: `${id}@test.local`,
+      name: `Test ${primaryRole}`,
+      role: primaryRole,
+      roles: rolesArray,
+      status: 'ACTIVE',
+    },
+  })
+}
+
+describe('user.getDefaultDashboard', () => {
+  const programIds: string[] = []
+  const userIds: string[] = []
+
+  afterAll(async () => {
+    for (const programId of programIds) {
+      await prisma.mentorAssignment.deleteMany({ where: { project: { programId } } })
+      await cleanupTestData(programId, [])
+    }
+    if (userIds.length > 0) {
+      await prisma.user.deleteMany({ where: { id: { in: userIds } } })
+    }
+  })
+
+  it('returns /admin for SUPER_ADMIN unconditionally', async () => {
+    const u = await createUserWithRoles('SUPER_ADMIN', ['SUPER_ADMIN'])
+    userIds.push(u.id)
+    const caller = createCaller(userRouter, { id: u.id, email: u.email, role: 'SUPER_ADMIN' })
+    const result = await caller.getDefaultDashboard()
+    expect(result.path).toBe('/admin')
+    expect(result.role).toBe('SUPER_ADMIN')
+  })
+
+  it('returns /jury for a juror with a pending assignment in an active round', async () => {
+    const u = await createUserWithRoles('JURY_MEMBER', ['JURY_MEMBER', 'OBSERVER'])
+    userIds.push(u.id)
+    const program = await createTestProgram({ name: `default-juror-active-${uid()}` })
+    programIds.push(program.id)
+    const competition = await createTestCompetition(program.id, { status: 'ACTIVE' })
+    const round = await createTestRound(competition.id, {
+      roundType: 'EVALUATION',
+      status: 'ROUND_ACTIVE',
+    })
+    const project = await createTestProject(program.id)
+    await createTestProjectRoundState(project.id, round.id)
+    await prisma.assignment.create({
+      data: { userId: u.id, projectId: project.id, roundId: round.id, method: 'MANUAL' },
+    })
+    const caller = createCaller(userRouter, { id: u.id, email: u.email, role: 'JURY_MEMBER' })
+    const result = await caller.getDefaultDashboard()
+    expect(result.path).toBe('/jury')
+  })
+
+  it('falls back to /jury (static priority) when juror+observer has no active work', async () => {
+    const u = await createUserWithRoles('JURY_MEMBER', ['JURY_MEMBER', 'OBSERVER'])
+    userIds.push(u.id)
+    const caller = createCaller(userRouter, { id: u.id, email: u.email, role: 'JURY_MEMBER' })
+    const result = await caller.getDefaultDashboard()
+    expect(result.path).toBe('/jury')
+    expect(result.reason).toBe('static-fallback')
+  })
+
+  it('returns /mentor for a mentor+juror with active mentoring but no jury work', async () => {
+    const u = await createUserWithRoles('MENTOR', ['MENTOR', 'JURY_MEMBER'])
+    userIds.push(u.id)
+    const program = await createTestProgram({ name: `default-mentor-active-${uid()}` })
+    programIds.push(program.id)
+    const competition = await createTestCompetition(program.id, { status: 'ACTIVE' })
+    const round = await createTestRound(competition.id, {
+      roundType: 'MENTORING',
+      status: 'ROUND_ACTIVE',
+    })
+    const project = await createTestProject(program.id)
+    await createTestProjectRoundState(project.id, round.id)
+    await prisma.mentorAssignment.create({
+      data: {
+        projectId: project.id,
+        mentorId: u.id,
+        method: 'MANUAL',
+        workspaceEnabled: true,
+      },
+    })
+    const caller = createCaller(userRouter, { id: u.id, email: u.email, role: 'MENTOR' })
+    const result = await caller.getDefaultDashboard()
+    expect(result.path).toBe('/mentor')
+  })
+
+  it('returns /jury when both jury and mentor work are active (jury wins on priority)', async () => {
+    const u = await createUserWithRoles('JURY_MEMBER', ['JURY_MEMBER', 'MENTOR'])
+    userIds.push(u.id)
+    const program = await createTestProgram({ name: `default-both-active-${uid()}` })
+    programIds.push(program.id)
+    const competition = await createTestCompetition(program.id, { status: 'ACTIVE' })
+    const evalRound = await createTestRound(competition.id, {
+      roundType: 'EVALUATION',
+      status: 'ROUND_ACTIVE',
+      sortOrder: 0,
+    })
+    const mentRound = await createTestRound(competition.id, {
+      roundType: 'MENTORING',
+      status: 'ROUND_ACTIVE',
+      sortOrder: 1,
+    })
+    const projectE = await createTestProject(program.id)
+    const projectM = await createTestProject(program.id)
+    await createTestProjectRoundState(projectE.id, evalRound.id)
+    await createTestProjectRoundState(projectM.id, mentRound.id)
+    await prisma.assignment.create({
+      data: { userId: u.id, projectId: projectE.id, roundId: evalRound.id, method: 'MANUAL' },
+    })
+    await prisma.mentorAssignment.create({
+      data: {
+        projectId: projectM.id,
+        mentorId: u.id,
+        method: 'MANUAL',
+        workspaceEnabled: true,
+      },
+    })
+    const caller = createCaller(userRouter, { id: u.id, email: u.email, role: 'JURY_MEMBER' })
+    const result = await caller.getDefaultDashboard()
+    expect(result.path).toBe('/jury')
+  })
+
+  it('returns /observer for an observer-only user (static fallback)', async () => {
+    const u = await createUserWithRoles('OBSERVER', ['OBSERVER'])
+    userIds.push(u.id)
+    const caller = createCaller(userRouter, { id: u.id, email: u.email, role: 'OBSERVER' })
+    const result = await caller.getDefaultDashboard()
+    expect(result.path).toBe('/observer')
+  })
+})