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/views/AdminControl.vue

@@ -43,6 +43,41 @@ function resumeVoting() {
   admin.controlVoting('resume');
 }
 
+// Program voting control
+function nextProgram() {
+  const socket = admin.getSocket();
+  if (socket) {
+    socket.emit('admin:next_program' as any, {}, (response: any) => {
+      if (!response.success) {
+        console.error('Failed to move to next program:', response.message);
+      }
+    });
+  }
+}
+
+function startProgramVoting(programId: string) {
+  const socket = admin.getSocket();
+  if (socket) {
+    socket.emit('admin:start_program' as any, { programId }, (response: any) => {
+      if (!response.success) {
+        console.error('Failed to start program voting:', response.message);
+      }
+    });
+  }
+}
+
+function toggleLateCatch() {
+  const socket = admin.getSocket();
+  if (socket) {
+    const newValue = !admin.allowLateCatch;
+    socket.emit('admin:toggle_late_catch' as any, { enabled: newValue }, (response: any) => {
+      if (!response.success) {
+        console.error('Failed to toggle late catch:', response.message);
+      }
+    });
+  }
+}
+
 // Lottery control
 function startGalaxy() {
   admin.controlLottery('start_galaxy');
@@ -224,6 +259,30 @@ onUnmounted(() => {
         </div>
       </section>
 
+      <!-- Section A2: Program Votes Display -->
+      <section class="control-section program-section">
+        <div class="section-header">
+          <h2>节目票数</h2>
+          <span class="section-status">共 {{ admin.programs.length }} 个节目</span>
+        </div>
+
+        <div class="section-body">
+          <!-- Program Vote List (Read-only) -->
+          <div class="program-list">
+            <div
+              v-for="(program, idx) in admin.programs"
+              :key="program.id"
+              class="program-item readonly"
+            >
+              <span class="program-order">{{ idx + 1 }}</span>
+              <span class="program-name">{{ program.name }}</span>
+              <span class="program-team">{{ program.teamName }}</span>
+              <span class="program-votes">{{ program.votes }} 票</span>
+            </div>
+          </div>
+        </div>
+      </section>
+
       <!-- Section B: Lottery Controller -->
       <section class="control-section lottery-section">
         <div class="section-header">