Round system redesign: criteria voting, audience voting, pipeline view, and admin UX improvements

- Schema: Extend LiveVotingSession with votingMode, criteriaJson, audience fields;
  add AudienceVoter model; make LiveVote.userId nullable for audience voters
- Backend: Criteria-based voting with weighted scores, audience registration/voting
  with token-based dedup, configurable jury/audience weight in results
- Jury UI: Criteria scoring with per-criterion sliders alongside simple 1-10 mode
- Public audience voting page at /vote/[sessionId] with mobile-first design
- Admin live voting: Tabbed layout (Session/Config/Results), criteria config,
  audience settings, weight-adjustable results with tie detection
- Round type settings: Visual card selector replacing dropdown, feature tags
- Round detail page: Live event status section, type-specific stats and actions
- Round pipeline view: Horizontal visualization with bottleneck detection,
  List/Pipeline toggle on rounds page
- SSE: Separate jury/audience vote events, audience vote tracking
- Field visibility: Hide irrelevant fields per round type in create/edit forms

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

src/hooks/use-live-voting-sse.ts

@@ -10,6 +10,13 @@ export interface VoteUpdate {
   timestamp: string
 }
 
+export interface AudienceVoteUpdate {
+  projectId: string
+  audienceVotes: number
+  audienceAverage: number | null
+  timestamp: string
+}
+
 export interface SessionStatusUpdate {
   status: string
   timestamp: string
@@ -23,6 +30,7 @@ export interface ProjectChangeUpdate {
 
 interface SSECallbacks {
   onVoteUpdate?: (data: VoteUpdate) => void
+  onAudienceVote?: (data: AudienceVoteUpdate) => void
   onSessionStatus?: (data: SessionStatusUpdate) => void
   onProjectChange?: (data: ProjectChangeUpdate) => void
   onConnected?: () => void
@@ -65,6 +73,15 @@ export function useLiveVotingSSE(
       }
     })
 
+    es.addEventListener('audience_vote', (event) => {
+      try {
+        const data = JSON.parse(event.data) as AudienceVoteUpdate
+        callbacksRef.current.onAudienceVote?.(data)
+      } catch {
+        // Ignore parse errors
+      }
+    })
+
     es.addEventListener('session_status', (event) => {
       try {
         const data = JSON.parse(event.data) as SessionStatusUpdate