[POLISH] Docker setup fix + UI polish + project completion

- Fix Docker: add php.ini, correct env var names (DB_NAME/DB_USER/DB_PASS),
  add 002_email_log.sql to initdb, add Authorization header passthrough,
  add uploads volume, install opcache, create .dockerignore
- UI polish: page fade-in transitions, skeleton loader CSS, staggered card
  animations, mobile sidebar backdrop overlay, keyboard focus-visible styles,
  button loading state, tooltip system, alert banners, tab component,
  custom scrollbar, print styles, clickable table rows
- Add setButtonLoading() and _toggleSidebar() helpers to common.js
- Update CLAUDE.md to reflect 100% project completion

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

docker/nginx.conf

@@ -32,6 +32,9 @@ server {
         fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
         include fastcgi_params;
 
+        # Pass Authorization header (required for JWT auth)
+        fastcgi_param HTTP_AUTHORIZATION $http_authorization;
+
         fastcgi_param HTTP_PROXY "";
         fastcgi_buffer_size 128k;
         fastcgi_buffers 4 256k;