feat: observer team tab, admin-controlled applicant feedback visibility

- Add Team tab to observer project detail (configurable via admin settings)
- Move applicant jury feedback visibility from per-round config to admin settings
- Add per-round-type controls: evaluation, live final, deliberation
- Support anonymous LiveVote and DeliberationVote display for applicants
- Add fine-grained toggles: scores, criteria, written feedback, hide from rejected
- Backwards compatible: falls back to old per-round config if admin settings not set
- New admin settings section under Analytics tab with all visibility controls
- Seed new SystemSettings keys for observer/applicant visibility

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

src/components/observer/observer-project-detail.tsx

@@ -47,6 +47,7 @@ export function ObserverProjectDetail({ projectId }: { projectId: string }) {
     { id: projectId },
     { refetchInterval: 30_000 },
   )
+  const { data: flags } = trpc.settings.getFeatureFlags.useQuery()
 
   const roundId = data?.assignments?.[0]?.roundId as string | undefined
   const { data: activeForm } = trpc.evaluation.getStageForm.useQuery(
@@ -242,6 +243,14 @@ export function ObserverProjectDetail({ projectId }: { projectId: string }) {
             )}
           </TabsTrigger>
           <TabsTrigger value="files">Files</TabsTrigger>
+          {flags?.observerShowTeamTab && project.teamMembers.length > 0 && (
+            <TabsTrigger value="team">
+              Team
+              <Badge variant="secondary" className="ml-1.5 h-4 px-1 text-xs">
+                {project.teamMembers.length}
+              </Badge>
+            </TabsTrigger>
+          )}
         </TabsList>
 
         {/* ── Overview Tab ── */}
@@ -854,6 +863,48 @@ export function ObserverProjectDetail({ projectId }: { projectId: string }) {
           )}
         </TabsContent>
 
+        {/* ── Team Tab ── */}
+        {flags?.observerShowTeamTab && project.teamMembers.length > 0 && (
+          <TabsContent value="team" className="mt-6">
+            <AnimatedCard index={0}>
+              <Card>
+                <CardHeader>
+                  <CardTitle className="flex items-center gap-2.5 text-lg">
+                    <div className="rounded-lg bg-indigo-500/10 p-1.5">
+                      <Users className="h-4 w-4 text-indigo-500" />
+                    </div>
+                    Team Members
+                  </CardTitle>
+                </CardHeader>
+                <CardContent>
+                  <div className="space-y-3">
+                    {project.teamMembers.map((member) => (
+                      <div key={member.userId} className="flex items-center gap-3 rounded-lg border p-3">
+                        <UserAvatar
+                          user={member.user}
+                          avatarUrl={(member.user as { avatarUrl?: string | null }).avatarUrl}
+                          size="md"
+                        />
+                        <div className="min-w-0 flex-1">
+                          <p className="text-sm font-semibold truncate">
+                            {member.user.name || 'Unnamed'}
+                          </p>
+                          <p className="text-xs text-muted-foreground truncate">
+                            {member.user.email}
+                          </p>
+                        </div>
+                        <Badge variant="outline" className="shrink-0 text-xs">
+                          {member.role === 'LEAD' ? 'Lead' : member.role === 'ADVISOR' ? 'Advisor' : 'Member'}
+                        </Badge>
+                      </div>
+                    ))}
+                  </div>
+                </CardContent>
+              </Card>
+            </AnimatedCard>
+          </TabsContent>
+        )}
+
         {/* ── Files Tab ── */}
         <TabsContent value="files" className="mt-6">
           <Card>