[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/Dockerfile

@@ -1,18 +1,20 @@
 FROM php:8.4-fpm-alpine
 
-# Extensions
-RUN docker-php-ext-install pdo pdo_mysql
+# System dependencies
+RUN apk add --no-cache curl-dev
 
-# Curl extension
-RUN apk add --no-cache curl-dev && docker-php-ext-install curl
+# PHP extensions
+RUN docker-php-ext-install pdo pdo_mysql curl opcache
 
-# Config
+# Custom PHP config
 COPY docker/php.ini /usr/local/etc/php/conf.d/custom.ini
 
 WORKDIR /var/www/nis2-agile
 
 COPY . .
 
-RUN chown -R www-data:www-data /var/www/nis2-agile
+# Create uploads directory and set permissions
+RUN mkdir -p /var/www/nis2-agile/public/uploads/visure \
+    && chown -R www-data:www-data /var/www/nis2-agile
 
 EXPOSE 9000