Initial commit: MOPC platform with Docker deployment setup

Full Next.js 15 platform with tRPC, Prisma, PostgreSQL, NextAuth.
Includes production Dockerfile (multi-stage, port 7600), docker-compose
with registry-based image pull, Gitea Actions CI workflow, nginx config
for portal.monaco-opc.com, deployment scripts, and DEPLOYMENT.md guide.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/shared/empty-state.tsx

@@ -0,0 +1,49 @@
+import { LucideIcon } from 'lucide-react'
+import { Button } from '@/components/ui/button'
+import { cn } from '@/lib/utils'
+
+interface EmptyStateProps {
+  icon: LucideIcon
+  title: string
+  description?: string
+  action?: {
+    label: string
+    href?: string
+    onClick?: () => void
+  }
+  className?: string
+}
+
+export function EmptyState({
+  icon: Icon,
+  title,
+  description,
+  action,
+  className,
+}: EmptyStateProps) {
+  return (
+    <div
+      className={cn(
+        'flex flex-col items-center justify-center py-12 text-center',
+        className
+      )}
+    >
+      <Icon className="h-12 w-12 text-muted-foreground/50" />
+      <h3 className="mt-4 font-medium">{title}</h3>
+      {description && (
+        <p className="mt-1 max-w-sm text-sm text-muted-foreground">
+          {description}
+        </p>
+      )}
+      {action && (
+        <Button
+          className="mt-4"
+          onClick={action.onClick}
+          asChild={!!action.href}
+        >
+          {action.href ? <a href={action.href}>{action.label}</a> : action.label}
+        </Button>
+      )}
+    </div>
+  )
+}