feat: clickable pills, configurable page size, CQRE.NET branding

- Service/category pills are now clickable: click to filter by that service
- Result pills (Success, Failure, etc.) are now clickable: click to filter by that result
- Click again to clear the filter (toggle behavior)
- Change default page size from 100 to 25
- Add DEFAULT_PAGE_SIZE config (env var, default 25), exposed via /api/config/features
- Change footer brand from CQRE to CQRE.NET
- Add pill--clickable hover styles
- Bump CSS cache-buster to v=10

.env.example

@@ -55,6 +55,9 @@ LLM_API_VERSION=
 # For local dev, start Valkey with: docker run -d -p 6379:6379 valkey/valkey:8-alpine
 REDIS_URL=redis://localhost:6379/0
 
+# UI default page size (number of events shown per page)
+DEFAULT_PAGE_SIZE=25
+
 # Optional: privacy / access control
 # Hide entire services from users without PRIVACY_SERVICE_ROLES
 # PRIVACY_SERVICES=Exchange,Teams