Phase 1 MVP: gateway, CRUD handlers, frontend components

Backend:
- WebSocket gateway (hub, client, events) with fanout broadcast
- Server CRUD handlers (create, list, get, update, delete)
- Channel CRUD handlers (create, list, get, update, delete)
- Message CRUD handlers (list with cursor pagination, create, update, delete)
- cmd/migrate standalone migration CLI (up/down)
- cmd/server wired to all handlers + WebSocket + static file serving

Frontend:
- Zustand stores: auth, server, channel, message, websocket
- API client with fetch wrapper
- Terminal-styled components: Layout, LoginForm, ChatArea, ChannelList, ServerBar, MemberList
- React Router with login and main routes
- Gruvbox dark palette throughout

Ops:
- Docker Compose with app service (multi-stage build)
- Caddyfile with WebSocket upgrade support
- Makefile for common tasks

web/src/App.tsx

@@ -1,17 +1,33 @@
-function App() {
-  return (
-    <div className="h-full w-full flex flex-col items-center justify-center bg-gb-bg text-gb-fg">
-      <div className="terminal-border p-6 bg-gb-bg-h">
-        <pre className="text-gb-orange font-mono text-lg mb-4">
-          {"┌─ DUMPSTER ─┐"}
-        </pre>
-        <p className="text-gb-fg-s mb-4">The server is running. Frontend coming soon.</p>
-        <button className="terminal-button">
-          [LOGIN]
-        </button>
-      </div>
-    </div>
-  )
+import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom';
+import { LoginForm } from './components/LoginForm.tsx';
+import { Layout } from './components/Layout.tsx';
+import { ChatArea } from './components/ChatArea.tsx';
+import { useAuthStore } from './stores/auth.ts';
+
+function ProtectedRoute({ children }: { children: React.ReactNode }) {
+  const isAuthenticated = useAuthStore((state) => state.isAuthenticated);
+  return isAuthenticated ? <>{children}</> : <Navigate to="/login" replace />;
 }
 
-export default App
+function App() {
+  return (
+    <BrowserRouter>
+      <Routes>
+        <Route path="/login" element={<LoginForm />} />
+        <Route
+          path="/"
+          element={
+            <ProtectedRoute>
+              <Layout />
+            </ProtectedRoute>
+          }
+        >
+          <Route index element={<ChatArea />} />
+          <Route path="channels/:channelId" element={<ChatArea />} />
+        </Route>
+      </Routes>
+    </BrowserRouter>
+  );
+}
+
+export default App;