Competition/Round architecture: full platform rewrite (Phases 1-9)

Replace Pipeline/Stage system with Competition/Round architecture.
New schema: Competition, Round (7 types), JuryGroup, AssignmentPolicy,
ProjectRoundState, DeliberationSession, ResultLock, SubmissionWindow.
New services: round-engine, round-assignment, deliberation, result-lock,
submission-manager, competition-context, ai-prompt-guard.
Full admin/jury/applicant/mentor UI rewrite. AI prompt hardening with
structured prompts, retry logic, and injection detection. All legacy
pipeline/stage code removed. 4 new migrations + seed aligned.

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

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

@@ -0,0 +1,141 @@
+'use client'
+
+import { useParams } from 'next/navigation'
+import Link from 'next/link'
+import type { Route } from 'next'
+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 { WorkspaceChat } from '@/components/mentor/workspace-chat'
+import { FilePromotionPanel } from '@/components/mentor/file-promotion-panel'
+import { ArrowLeft, MessageSquare, FileText, Upload } from 'lucide-react'
+import { toast } from 'sonner'
+
+export default function MentorWorkspaceDetailPage() {
+  const params = useParams()
+  const projectId = params.projectId as string
+
+  // Get mentor assignment for this project
+  const { data: assignments } = trpc.mentor.getMyProjects.useQuery()
+  const assignment = assignments?.find(a => a.projectId === projectId)
+
+  const { data: project, isLoading } = trpc.project.get.useQuery(
+    { id: projectId },
+    { enabled: !!projectId }
+  )
+
+  if (isLoading) {
+    return (
+      <div className="space-y-6">
+        <Skeleton className="h-8 w-64" />
+        <Skeleton className="h-96" />
+      </div>
+    )
+  }
+
+  if (!project) {
+    return (
+      <div className="space-y-6">
+        <Button variant="ghost" size="sm" asChild>
+          <Link href={'/mentor/workspace' as Route}>
+            <ArrowLeft className="mr-2 h-4 w-4" />
+            Back
+          </Link>
+        </Button>
+        <Card>
+          <CardContent className="flex flex-col items-center justify-center py-12">
+            <FileText className="h-12 w-12 text-muted-foreground/50 mb-3" />
+            <p className="font-medium">Project not found</p>
+          </CardContent>
+        </Card>
+      </div>
+    )
+  }
+
+  return (
+    <div className="space-y-6">
+      <div className="flex items-center gap-4">
+        <Button variant="ghost" size="sm" asChild>
+          <Link href={'/mentor/workspace' as Route}>
+            <ArrowLeft className="mr-2 h-4 w-4" />
+            Back
+          </Link>
+        </Button>
+        <div className="flex-1">
+          <div className="flex items-center gap-3 flex-wrap">
+            <h1 className="text-2xl font-bold tracking-tight">{project.title}</h1>
+            {project.status && (
+              <Badge variant="secondary">{project.status}</Badge>
+            )}
+          </div>
+          {project.teamName && (
+            <p className="text-muted-foreground mt-1">{project.teamName}</p>
+          )}
+        </div>
+      </div>
+
+      <Tabs defaultValue="chat" className="w-full">
+        <TabsList className="w-full sm:w-auto grid grid-cols-3 sm:inline-grid">
+          <TabsTrigger value="chat" className="flex items-center gap-2">
+            <MessageSquare className="h-4 w-4" />
+            <span className="hidden sm:inline">Chat</span>
+          </TabsTrigger>
+          <TabsTrigger value="files" className="flex items-center gap-2">
+            <FileText className="h-4 w-4" />
+            <span className="hidden sm:inline">Files</span>
+          </TabsTrigger>
+          <TabsTrigger value="promotion" className="flex items-center gap-2">
+            <Upload className="h-4 w-4" />
+            <span className="hidden sm:inline">Promotion</span>
+          </TabsTrigger>
+        </TabsList>
+
+        <TabsContent value="chat" className="mt-6">
+          {assignment ? (
+            <WorkspaceChat mentorAssignmentId={assignment.id} />
+          ) : (
+            <Card>
+              <CardContent className="text-center py-8">
+                <MessageSquare className="h-12 w-12 text-muted-foreground/50 mx-auto mb-3" />
+                <p className="text-sm text-muted-foreground">Loading workspace...</p>
+              </CardContent>
+            </Card>
+          )}
+        </TabsContent>
+
+        <TabsContent value="files" className="mt-6">
+          <Card>
+            <CardHeader>
+              <CardTitle>Workspace Files</CardTitle>
+              <CardDescription>
+                Files shared in the mentor workspace
+              </CardDescription>
+            </CardHeader>
+            <CardContent className="text-center py-8">
+              <FileText className="h-12 w-12 text-muted-foreground/50 mx-auto mb-3" />
+              <p className="text-sm text-muted-foreground">
+                File listing feature coming soon
+              </p>
+            </CardContent>
+          </Card>
+        </TabsContent>
+
+        <TabsContent value="promotion" className="mt-6">
+          {assignment ? (
+            <FilePromotionPanel mentorAssignmentId={assignment.id} />
+          ) : (
+            <Card>
+              <CardContent className="text-center py-8">
+                <Upload className="h-12 w-12 text-muted-foreground/50 mx-auto mb-3" />
+                <p className="text-sm text-muted-foreground">Loading workspace...</p>
+              </CardContent>
+            </Card>
+          )}
+        </TabsContent>
+      </Tabs>
+    </div>
+  )
+}

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

@@ -0,0 +1,128 @@
+'use client'
+
+import Link from 'next/link'
+import type { Route } from 'next'
+import { trpc } from '@/lib/trpc/client'
+import { Card, CardContent, 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 { ArrowLeft, ArrowRight, Users, Briefcase } from 'lucide-react'
+import { toast } from 'sonner'
+
+const statusColors: Record<string, 'default' | 'secondary' | 'destructive' | 'outline'> = {
+  SUBMITTED: 'secondary',
+  ELIGIBLE: 'default',
+  SEMIFINALIST: 'default',
+  FINALIST: 'default',
+  WINNER: 'default',
+  REJECTED: 'destructive',
+}
+
+export default function MentorWorkspacePage() {
+  const { data: assignments, isLoading } = trpc.mentor.getMyProjects.useQuery()
+
+  if (isLoading) {
+    return (
+      <div className="space-y-6">
+        <Skeleton className="h-8 w-64" />
+        <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
+          {[1, 2, 3].map((i) => (
+            <Skeleton key={i} className="h-40" />
+          ))}
+        </div>
+      </div>
+    )
+  }
+
+  const projects = assignments || []
+
+  return (
+    <div className="space-y-6">
+      <div className="flex items-center justify-between">
+        <div>
+          <h1 className="text-2xl font-bold tracking-tight">Mentor Workspace</h1>
+          <p className="text-muted-foreground mt-1">
+            Collaborate with your assigned mentee projects
+          </p>
+        </div>
+        <Button variant="ghost" size="sm" asChild>
+          <Link href={'/mentor' as Route}>
+            <ArrowLeft className="mr-2 h-4 w-4" />
+            Back to Dashboard
+          </Link>
+        </Button>
+      </div>
+
+      {projects.length === 0 ? (
+        <Card>
+          <CardContent className="flex flex-col items-center justify-center py-12">
+            <div className="rounded-2xl bg-brand-teal/10 p-4 mb-4">
+              <Briefcase className="h-8 w-8 text-brand-teal/60" />
+            </div>
+            <h2 className="text-xl font-semibold mb-2">No Projects Assigned</h2>
+            <p className="text-muted-foreground text-center max-w-md">
+              You don&apos;t have any mentee projects assigned yet. Check back later.
+            </p>
+          </CardContent>
+        </Card>
+      ) : (
+        <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-3">
+          {projects.map((assignment) => {
+            const project = assignment.project
+            const teamSize = project.teamMembers?.length || 0
+
+            return (
+              <Card
+                key={assignment.id}
+                className="flex flex-col transition-all duration-200 hover:-translate-y-0.5 hover:shadow-md"
+              >
+                <CardHeader>
+                  <div className="flex items-start justify-between">
+                    <div className="flex-1 min-w-0">
+                      <CardTitle className="text-lg truncate" title={project.title}>
+                        {project.title}
+                      </CardTitle>
+                      {project.teamName && (
+                        <p className="text-sm text-muted-foreground mt-1 truncate">
+                          {project.teamName}
+                        </p>
+                      )}
+                    </div>
+                    {project.status && (
+                      <Badge variant={statusColors[project.status] || 'secondary'} className="shrink-0 ml-2">
+                        {project.status}
+                      </Badge>
+                    )}
+                  </div>
+                </CardHeader>
+                <CardContent className="flex-1 flex flex-col space-y-4">
+                  {project.description && (
+                    <p className="text-sm text-muted-foreground line-clamp-2">
+                      {project.description}
+                    </p>
+                  )}
+
+                  <div className="flex-1" />
+
+                  <div className="flex items-center justify-between text-sm pt-3 border-t">
+                    <div className="flex items-center gap-2 text-muted-foreground">
+                      <Users className="h-4 w-4" />
+                      <span>{teamSize} member{teamSize !== 1 ? 's' : ''}</span>
+                    </div>
+                    <Button variant="ghost" size="sm" asChild>
+                      <Link href={`/mentor/workspace/${project.id}` as Route}>
+                        Open
+                        <ArrowRight className="ml-1 h-4 w-4" />
+                      </Link>
+                    </Button>
+                  </div>
+                </CardContent>
+              </Card>
+            )
+          })}
+        </div>
+      )}
+    </div>
+  )
+}