Implement 10 platform features: evaluation UX, admin tools, AI summaries, applicant portal

Batch 1 - Quick Wins:
- F1: Evaluation progress indicator with touch tracking in sticky status bar
- F2: Export filtering results as CSV with dynamic AI column flattening
- F3: Observer access to analytics dashboards (8 procedures changed to observerProcedure)

Batch 2 - Jury Experience:
- F4: Countdown timer component with urgency colors + email reminder service with cron endpoint
- F5: Conflict of interest declaration system (dialog, admin management, review workflow)

Batch 3 - Admin & AI Enhancements:
- F6: Bulk status update UI with selection checkboxes, floating toolbar, status history recording
- F7: AI-powered evaluation summary with anonymized data, OpenAI integration, scoring patterns
- F8: Smart assignment improvements (geo diversity penalty, round familiarity bonus, COI blocking)

Batch 4 - Form Flexibility & Applicant Portal:
- F9: Evaluation form flexibility (text, boolean, section_header types, conditional visibility)
- F10: Applicant portal (status timeline, per-round documents, mentor messaging)

Schema: 5 new models (ReminderLog, ConflictOfInterest, EvaluationSummary, ProjectStatusHistory, MentorMessage), ProjectFile extended with roundId + isLate.

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

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

@@ -418,7 +418,45 @@ function EditRoundContent({ roundId }: { roundId: string }) {
             </CardContent>
           </Card>
 
-          {/* Team Notification - removed from schema, feature not implemented */}
+          {/* Upload Deadline Policy */}
+          <Card>
+            <CardHeader>
+              <CardTitle className="text-lg">Upload Deadline Policy</CardTitle>
+              <CardDescription>
+                Control how file uploads are handled after the round starts
+              </CardDescription>
+            </CardHeader>
+            <CardContent className="space-y-4">
+              <Select
+                value={(roundSettings.uploadDeadlinePolicy as string) || ''}
+                onValueChange={(value) =>
+                  setRoundSettings((prev) => ({
+                    ...prev,
+                    uploadDeadlinePolicy: value || undefined,
+                  }))
+                }
+              >
+                <SelectTrigger>
+                  <SelectValue placeholder="Default (no restriction)" />
+                </SelectTrigger>
+                <SelectContent>
+                  <SelectItem value="NONE">
+                    Default - No restriction
+                  </SelectItem>
+                  <SelectItem value="BLOCK">
+                    Block uploads after round starts
+                  </SelectItem>
+                  <SelectItem value="ALLOW_LATE">
+                    Allow late uploads (marked as late)
+                  </SelectItem>
+                </SelectContent>
+              </Select>
+              <p className="text-sm text-muted-foreground">
+                When set to &ldquo;Block&rdquo;, applicants cannot upload files after the voting start date.
+                When set to &ldquo;Allow late&rdquo;, uploads are accepted but flagged as late submissions.
+              </p>
+            </CardContent>
+          </Card>
 
           {/* Evaluation Criteria */}
           <Card>