flatten app to repo root and update docker deployment for single-stack runtime

components/ui/panel.tsx

@@ -0,0 +1,31 @@
+import { cn } from '@/lib/utils';
+
+type PanelProps = {
+  title?: string;
+  subtitle?: string;
+  actions?: React.ReactNode;
+  children: React.ReactNode;
+  className?: string;
+};
+
+export function Panel({ title, subtitle, actions, children, className }: PanelProps) {
+  return (
+    <section
+      className={cn(
+        'rounded-2xl border border-[color:var(--line-weak)] bg-[color:var(--panel)] p-5 shadow-[0_0_0_1px_rgba(0,255,180,0.03),0_12px_30px_rgba(1,4,10,0.45)]',
+        className
+      )}
+    >
+      {(title || subtitle || actions) ? (
+        <header className="mb-4 flex items-start justify-between gap-3">
+          <div>
+            {title ? <h3 className="text-base font-semibold text-[color:var(--terminal-bright)]">{title}</h3> : null}
+            {subtitle ? <p className="mt-1 text-sm text-[color:var(--terminal-muted)]">{subtitle}</p> : null}
+          </div>
+          {actions ? <div>{actions}</div> : null}
+        </header>
+      ) : null}
+      {children}
+    </section>
+  );
+}