Multi-role members, round detail UI overhaul, dashboard jury progress, and submit bug fix

- Add roles UserRole[] to User model with migration + backfill from existing role column
- Update auth JWT/session to propagate roles array with [role] fallback for stale tokens
- Update tRPC hasRole() middleware and add userHasRole() helper for inline role checks
- Update ~15 router inline checks and ~13 DB queries to use roles array
- Add updateRoles admin mutation with SUPER_ADMIN guard and priority-based primary role
- Add role switcher UI in admin sidebar and role-nav for multi-role users
- Remove redundant stats cards from round detail, add window dates to header banner
- Merge Members section into JuryProgressTable with inline cap editor and remove buttons
- Reorder round detail assignments tab: Progress > Score Dist > Assignments > Coverage > Jury Group
- Make score distribution fill full vertical height, reassignment history always open
- Add per-juror progress bars to admin dashboard ActiveRoundPanel for EVALUATION rounds
- Fix evaluation submit bug: use isSubmitting state instead of startMutation.isPending

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

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

@@ -41,6 +41,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
   const evaluationIdRef = useRef<string | null>(null)
   const isSubmittedRef = useRef(false)
   const isSubmittingRef = useRef(false)
+  const [isSubmitting, setIsSubmitting] = useState(false)
   const autosaveTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
   const [lastSavedAt, setLastSavedAt] = useState<Date | null>(null)
 
@@ -318,10 +319,12 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
       autosaveTimerRef.current = null
     }
     isSubmittingRef.current = true
+    setIsSubmitting(true)
 
     if (!myAssignment) {
       toast.error('Assignment not found')
       isSubmittingRef.current = false
+      setIsSubmitting(false)
       return
     }
 
@@ -335,16 +338,19 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
         if (c.type === 'numeric' && (val === undefined || val === null)) {
           toast.error(`Please score "${c.label}"`)
           isSubmittingRef.current = false
+          setIsSubmitting(false)
           return
         }
         if (c.type === 'boolean' && val === undefined) {
           toast.error(`Please answer "${c.label}"`)
           isSubmittingRef.current = false
+          setIsSubmitting(false)
           return
         }
         if (c.type === 'text' && (!val || (typeof val === 'string' && !val.trim()))) {
           toast.error(`Please fill in "${c.label}"`)
           isSubmittingRef.current = false
+          setIsSubmitting(false)
           return
         }
       }
@@ -355,6 +361,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
       if (isNaN(score) || score < 1 || score > 10) {
         toast.error('Please enter a valid score between 1 and 10')
         isSubmittingRef.current = false
+        setIsSubmitting(false)
         return
       }
     }
@@ -363,6 +370,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
       if (!binaryDecision) {
         toast.error('Please select accept or reject')
         isSubmittingRef.current = false
+        setIsSubmitting(false)
         return
       }
     }
@@ -371,6 +379,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
       if (!feedbackText.trim() || feedbackText.length < feedbackMinLength) {
         toast.error(`Please provide feedback (minimum ${feedbackMinLength} characters)`)
         isSubmittingRef.current = false
+        setIsSubmitting(false)
         return
       }
     }
@@ -414,6 +423,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
     } catch {
       // Error toast already handled by onError callback
       isSubmittingRef.current = false
+      setIsSubmitting(false)
     }
   }
 
@@ -878,7 +888,7 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
           </Button>
           <Button
             onClick={handleSubmit}
-            disabled={submitMutation.isPending || startMutation.isPending}
+            disabled={submitMutation.isPending || isSubmitting}
             className="bg-brand-blue hover:bg-brand-blue-light"
           >
             <Send className="mr-2 h-4 w-4" />