Fix multi-click submit bug and add draft submit indicator on juror dashboard

- Initialize slider values to midpoint so visual matches stored value
  (root cause: sliders appeared filled but criteriaValues was undefined)
- Use mutateAsync for submit to properly await and prevent double-clicks
- Add startMutation.isPending to submit button disabled state
- Add error toast in evaluation-form.tsx catch block (was silent)
- Show "Ready to submit" badge and "Review & Submit" button for drafts
  on juror dashboard

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

src/app/(jury)/jury/competitions/[roundId]/projects/[projectId]/evaluate/page.tsx

@@ -173,6 +173,24 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
     }
   })
 
+  // Initialize numeric criteria with midpoint values so slider visual matches stored value.
+  const criteriaInitializedRef = useRef(false)
+  useEffect(() => {
+    if (criteriaInitializedRef.current || criteria.length === 0) return
+    if (existingEvaluation?.criterionScoresJson) return
+    criteriaInitializedRef.current = true
+
+    const defaults: Record<string, number | boolean | string> = {}
+    for (const c of criteria) {
+      if (c.type === 'numeric') {
+        defaults[c.id] = Math.ceil((c.minScore + c.maxScore) / 2)
+      }
+    }
+    if (Object.keys(defaults).length > 0) {
+      setCriteriaValues((prev) => ({ ...defaults, ...prev }))
+    }
+  }, [criteria, existingEvaluation?.criterionScoresJson])
+
   // Build current form data for autosave
   const buildSavePayload = useCallback(() => {
     return {
@@ -370,13 +388,17 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
       }
     }
 
-    submitMutation.mutate({
+    try {
+      await submitMutation.mutateAsync({
         id: evaluationId,
         criterionScoresJson: scoringMode === 'criteria' ? criteriaValues : {},
         globalScore: scoringMode === 'global' ? parseInt(globalScore, 10) : computedGlobalScore,
         binaryDecision: scoringMode === 'binary' ? binaryDecision === 'accept' : true,
         feedbackText: feedbackText || 'No feedback provided',
       })
+    } catch {
+      // Error toast already handled by onError callback
+    }
   }
 
   if (!round || !project) {
@@ -840,7 +862,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
           </Button>
           <Button
             onClick={handleSubmit}
-            disabled={submitMutation.isPending || autosaveMutation.isPending}
+            disabled={submitMutation.isPending || autosaveMutation.isPending || startMutation.isPending}
             className="bg-brand-blue hover:bg-brand-blue-light"
           >
             <Send className="mr-2 h-4 w-4" />

src/app/(jury)/jury/page.tsx

@@ -26,6 +26,7 @@ import {
   Zap,
   BarChart3,
   Waves,
+  Send,
 } from 'lucide-react'
 import { formatDateOnly } from '@/lib/utils'
 import { CountdownTimer } from '@/components/shared/countdown-timer'
@@ -390,6 +391,11 @@ async function JuryDashboardContent() {
                                 <CheckCircle2 className="mr-1 h-3 w-3" />
                                 Done
                               </Badge>
+                            ) : isDraft && isVotingOpen ? (
+                              <Badge className="text-xs bg-amber-100 text-amber-800 border-amber-300 dark:bg-amber-950 dark:text-amber-300 dark:border-amber-700 animate-pulse">
+                                <Send className="mr-1 h-3 w-3" />
+                                Ready to submit
+                              </Badge>
                             ) : isDraft ? (
                               <Badge variant="warning" className="text-xs">
                                 <Clock className="mr-1 h-3 w-3" />
@@ -404,10 +410,17 @@ async function JuryDashboardContent() {
                                   View
                                 </Link>
                               </Button>
+                            ) : isVotingOpen && isDraft ? (
+                              <Button size="sm" asChild className="h-7 px-3 bg-amber-600 hover:bg-amber-700 text-white shadow-sm">
+                                <Link href={`/jury/competitions/${assignment.round.id}/projects/${assignment.project.id}/evaluate`}>
+                                  <Send className="mr-1 h-3 w-3" />
+                                  Review & Submit
+                                </Link>
+                              </Button>
                             ) : isVotingOpen ? (
                               <Button size="sm" asChild className="h-7 px-3 bg-brand-blue hover:bg-brand-blue-light shadow-sm">
                                 <Link href={`/jury/competitions/${assignment.round.id}/projects/${assignment.project.id}/evaluate`}>
-                                  {isDraft ? 'Continue' : 'Evaluate'}
+                                  Evaluate
                                 </Link>
                               </Button>
                             ) : (

src/components/forms/evaluation-form.tsx

@@ -303,7 +303,10 @@ export function EvaluationForm({
 
   // Submit handler
   const onSubmit = async (data: EvaluationFormData) => {
-    if (!currentEvaluationId) return
+    if (!currentEvaluationId) {
+      toast.error('Evaluation is still being created. Please wait a moment and try again.')
+      return
+    }
 
     try {
       await submit.mutateAsync({
@@ -325,6 +328,7 @@ export function EvaluationForm({
       })
     } catch (error) {
       console.error('Submit failed:', error)
+      toast.error(error instanceof Error ? error.message : 'Failed to submit evaluation. Please try again.')
     }
   }
 
@@ -359,7 +363,7 @@ export function EvaluationForm({
                 <AlertDialogTrigger asChild>
                   <Button
                     type="button"
-                    disabled={!isValid || submit.isPending}
+                    disabled={!isValid || submit.isPending || startEvaluation.isPending}
                   >
                     {submit.isPending ? (
                       <Loader2 className="mr-2 h-4 w-4 animate-spin" />
@@ -678,7 +682,7 @@ export function EvaluationForm({
               <Button
                 type="button"
                 size="lg"
-                disabled={!isValid || submit.isPending}
+                disabled={!isValid || submit.isPending || startEvaluation.isPending}
                 className="w-full sm:w-auto"
               >
                 {submit.isPending ? (