feat: redesign Big Screen voting view with philatelic postcard UI

- Add PostcardItem.vue component with Chinese postal aesthetics
- Add PostcardGrid.vue container with 4x2 CSS Grid layout
- Add Postmark.vue component for real-time vote stamp visualization
- Update LiveVotingView.vue with cream paper theme (#FDFBF7)
- Add Year of the Horse 2026 stamp image
- Add responsive breakpoints for different screen sizes
- Enhance admin service with program voting control
- Add vote stamp accumulation for big screen display

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/client-screen/src/stores/admin.ts

@@ -33,6 +33,9 @@ export const useAdminStore = defineStore('admin', () => {
   const votingOpen = ref(false);
   const votingPaused = ref(false);
   const totalVotes = ref(0);
+  const programs = ref<Array<{ id: string; name: string; teamName: string; order: number; status: string; votes: number; stamps: any[] }>>([]);
+  const allowLateCatch = ref(true);
+  const currentProgramId = ref<string | null>(null);
 
   // Lottery State
   const lotteryRound = ref<LotteryRound>(1);
@@ -143,7 +146,7 @@ export const useAdminStore = defineStore('admin', () => {
         userId: 'admin_main',
         userName: 'Admin Console',
         role: 'admin',
-      }, () => {});
+      }, () => { });
 
       // Request state sync
       socketInstance.emit(SOCKET_EVENTS.ADMIN_STATE_SYNC as any, {});
@@ -177,6 +180,9 @@ export const useAdminStore = defineStore('admin', () => {
     votingOpen.value = state.voting.subPhase === 'OPEN';
     votingPaused.value = state.voting.subPhase === 'PAUSED';
     totalVotes.value = state.voting.totalVotes;
+    programs.value = state.voting.programs || [];
+    allowLateCatch.value = state.voting.allowLateCatch ?? true;
+    currentProgramId.value = state.voting.currentProgramId || null;
     lotteryRound.value = state.lottery.round;
     lotterySubPhase.value = state.lottery.subPhase;
     currentWinners.value = state.lottery.currentWinners;
@@ -361,6 +367,9 @@ export const useAdminStore = defineStore('admin', () => {
     votingOpen,
     votingPaused,
     totalVotes,
+    programs,
+    allowLateCatch,
+    currentProgramId,
     lotteryRound,
     lotterySubPhase,
     stormStartedAt,
@@ -387,5 +396,6 @@ export const useAdminStore = defineStore('admin', () => {
     emergencyReset,
     controlMusic,
     clearError,
+    getSocket: () => socket.value,
   };
 });