Add Container Log Viewer UI with streaming, search, and download

- New container-logs.js module for viewing Docker container logs
- Integrated with existing API endpoints (/logs/containers, /logs/container/:id, /logs/stream/:id)
- Features:
  - Select container from dropdown
  - View logs with stdout/stderr color coding
  - Real-time log streaming via SSE
  - Search/filter within logs
  - Download logs as text file
  - Line count and filter indicators
- Added '📜 Container Logs' button to Tools section in index.html
- Added to features.js bundle via build.js
- Rebuilt dist files

status/build.js

@@ -33,6 +33,7 @@ const bundles = {
     JS('recipes.js'),
     JS('import-export.js'),
     JS('error-logs.js'),
+    JS('container-logs.js'),
     JS('smart-arr-connect.js'),
     JS('notification-settings.js'),
     JS('panel-tabs.js'),