feat: initial commit - Supervisor UI with Next.js 16 and Tailwind CSS 4

- Modern web interface for Supervisor process management
- Built with Next.js 16 (App Router) and Tailwind CSS 4
- Full XML-RPC client implementation for Supervisor API
- Real-time process monitoring with auto-refresh
- Process control: start, stop, restart operations
- Modern dashboard with system status and statistics
- Dark/light theme with OKLCH color system
- Docker multi-stage build with runtime env var configuration
- Gitea CI/CD workflow for automated builds
- Comprehensive documentation (README, IMPLEMENTATION, DEPLOYMENT)

Features:
- Backend proxy pattern for secure API communication
- React Query for state management and caching
- TypeScript strict mode with Zod validation
- Responsive design with mobile support
- Health check endpoint for monitoring
- Non-root user security in Docker

Environment Variables:
- SUPERVISOR_HOST, SUPERVISOR_PORT
- SUPERVISOR_USERNAME, SUPERVISOR_PASSWORD (optional)
- Configurable at build-time and runtime

🤖 Generated with Claude Code (https://claude.com/claude-code)

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

app/config/page.tsx

@@ -0,0 +1,25 @@
+'use client';
+
+import { Settings } from 'lucide-react';
+import { Card, CardContent } from '@/components/ui/card';
+
+export default function ConfigPage() {
+  return (
+    <div className="space-y-6">
+      <div>
+        <h1 className="text-3xl font-bold">Configuration</h1>
+        <p className="text-muted-foreground mt-1">Manage Supervisor settings</p>
+      </div>
+
+      <Card>
+        <CardContent className="p-12 text-center">
+          <Settings className="h-12 w-12 text-muted-foreground mx-auto mb-4" />
+          <h2 className="text-xl font-semibold mb-2">Configuration Coming Soon</h2>
+          <p className="text-muted-foreground">
+            This feature will allow you to reload configuration, add/remove process groups, and manage settings.
+          </p>
+        </CardContent>
+      </Card>
+    </div>
+  );
+}