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>

components/ui/badge.tsx

@@ -0,0 +1,27 @@
+import { HTMLAttributes } from 'react';
+import { cn } from '@/lib/utils/cn';
+
+export interface BadgeProps extends HTMLAttributes<HTMLDivElement> {
+  variant?: 'default' | 'secondary' | 'success' | 'warning' | 'destructive' | 'outline';
+}
+
+export function Badge({ className, variant = 'default', ...props }: BadgeProps) {
+  return (
+    <div
+      className={cn(
+        'inline-flex items-center rounded-full border px-2.5 py-0.5 text-xs font-semibold transition-colors',
+        'focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2',
+        {
+          'border-transparent bg-primary text-primary-foreground': variant === 'default',
+          'border-transparent bg-secondary text-secondary-foreground': variant === 'secondary',
+          'border-transparent bg-success text-success-foreground': variant === 'success',
+          'border-transparent bg-warning text-warning-foreground': variant === 'warning',
+          'border-transparent bg-destructive text-destructive-foreground': variant === 'destructive',
+          'text-foreground': variant === 'outline',
+        },
+        className
+      )}
+      {...props}
+    />
+  );
+}

components/ui/button.tsx

@@ -0,0 +1,44 @@
+import { ButtonHTMLAttributes, forwardRef } from 'react';
+import { cn } from '@/lib/utils/cn';
+
+export interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
+  variant?: 'default' | 'secondary' | 'success' | 'warning' | 'destructive' | 'ghost' | 'outline';
+  size?: 'sm' | 'md' | 'lg' | 'icon';
+}
+
+const Button = forwardRef<HTMLButtonElement, ButtonProps>(
+  ({ className, variant = 'default', size = 'md', ...props }, ref) => {
+    return (
+      <button
+        className={cn(
+          'inline-flex items-center justify-center gap-2 rounded-md font-medium transition-colors',
+          'focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2',
+          'disabled:pointer-events-none disabled:opacity-50',
+          {
+            'bg-primary text-primary-foreground hover:bg-primary/90': variant === 'default',
+            'bg-secondary text-secondary-foreground hover:bg-secondary/80': variant === 'secondary',
+            'bg-success text-success-foreground hover:bg-success/90': variant === 'success',
+            'bg-warning text-warning-foreground hover:bg-warning/90': variant === 'warning',
+            'bg-destructive text-destructive-foreground hover:bg-destructive/90':
+              variant === 'destructive',
+            'hover:bg-accent hover:text-accent-foreground': variant === 'ghost',
+            'border border-input bg-background hover:bg-accent hover:text-accent-foreground':
+              variant === 'outline',
+          },
+          {
+            'h-8 px-3 text-sm': size === 'sm',
+            'h-10 px-4': size === 'md',
+            'h-12 px-6 text-lg': size === 'lg',
+            'h-10 w-10': size === 'icon',
+          },
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    );
+  }
+);
+Button.displayName = 'Button';
+
+export { Button };

components/ui/card.tsx

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+import { HTMLAttributes, forwardRef } from 'react';
+import { cn } from '@/lib/utils/cn';
+
+const Card = forwardRef<HTMLDivElement, HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div
+      ref={ref}
+      className={cn(
+        'rounded-lg border bg-card text-card-foreground shadow-sm',
+        className
+      )}
+      {...props}
+    />
+  )
+);
+Card.displayName = 'Card';
+
+const CardHeader = forwardRef<HTMLDivElement, HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div
+      ref={ref}
+      className={cn('flex flex-col space-y-1.5 p-6', className)}
+      {...props}
+    />
+  )
+);
+CardHeader.displayName = 'CardHeader';
+
+const CardTitle = forwardRef<HTMLParagraphElement, HTMLAttributes<HTMLHeadingElement>>(
+  ({ className, ...props }, ref) => (
+    <h3
+      ref={ref}
+      className={cn('text-2xl font-semibold leading-none tracking-tight', className)}
+      {...props}
+    />
+  )
+);
+CardTitle.displayName = 'CardTitle';
+
+const CardDescription = forwardRef<HTMLParagraphElement, HTMLAttributes<HTMLParagraphElement>>(
+  ({ className, ...props }, ref) => (
+    <p
+      ref={ref}
+      className={cn('text-sm text-muted-foreground', className)}
+      {...props}
+    />
+  )
+);
+CardDescription.displayName = 'CardDescription';
+
+const CardContent = forwardRef<HTMLDivElement, HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div ref={ref} className={cn('p-6 pt-0', className)} {...props} />
+  )
+);
+CardContent.displayName = 'CardContent';
+
+const CardFooter = forwardRef<HTMLDivElement, HTMLAttributes<HTMLDivElement>>(
+  ({ className, ...props }, ref) => (
+    <div
+      ref={ref}
+      className={cn('flex items-center p-6 pt-0', className)}
+      {...props}
+    />
+  )
+);
+CardFooter.displayName = 'CardFooter';
+
+export { Card, CardHeader, CardFooter, CardTitle, CardDescription, CardContent };