feat: Reinitialize frontend with SvelteKit and TypeScript

- Delete old Vite+Svelte frontend
- Initialize new SvelteKit project with TypeScript
- Configure Tailwind CSS v4 + DaisyUI
- Implement JWT authentication with auto-refresh
- Create login page with form validation (Zod)
- Add protected route guards
- Update Docker configuration for single-stage build
- Add E2E tests with Playwright (6/11 passing)
- Fix Svelte 5 reactivity with $state() runes

Known issues:
- 5 E2E tests failing (timing/async issues)
- Token refresh implementation needs debugging
- Validation error display timing

backend/Dockerfile

@@ -0,0 +1,37 @@
+FROM php:8.4-cli
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    git \
+    curl \
+    libpng-dev \
+    libonig-dev \
+    libxml2-dev \
+    zip \
+    unzip \
+    libpq-dev \
+    libzip-dev \
+    && docker-php-ext-install pdo pdo_pgsql mbstring exif pcntl bcmath gd zip
+
+# Install Redis extension
+RUN pecl install redis && docker-php-ext-enable redis
+
+# Install Composer
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+# Set working directory
+WORKDIR /var/www/html
+
+# Copy existing application directory contents
+COPY . .
+
+# Install PHP dependencies
+RUN composer install --no-interaction --optimize-autoloader
+
+# Set permissions
+RUN chmod -R 755 /var/www/html/storage
+
+EXPOSE 3000
+
+# Run Laravel development server
+CMD ["php", "artisan", "serve", "--host=0.0.0.0", "--port=3000"]