fix: randomize quotes, remove CMS idle quote, fix postgres image tag

- Remove hardcoded Dennis Konkol idle quote from rotation
- Double quote pool (5 → 12 quotes per locale)
- Start at a random quote on page load
- Cycle to a random non-repeating quote every 10s instead of sequential
- Fix dev-deploy.yml: postgres:15-alpine → postgres:16-alpine

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

.gitea/workflows/dev-deploy.yml

@@ -68,7 +68,7 @@ jobs:
           
           # Remove old images to force re-pull with correct architecture
           echo "🔄 Removing old images to force re-pull..."
-          docker rmi postgres:15-alpine redis:7-alpine 2>/dev/null || true
+          docker rmi postgres:16-alpine redis:7-alpine 2>/dev/null || true
           
           # Ensure networks exist before compose starts (network is external)
           echo "🌐 Ensuring networks exist..."