Profiles, Giphy, uploads, settings UI

Backend:
- Auth: split routes into RegisterPublicRoutes + RegisterProtectedRoutes
- Auth: PATCH /me for profile updates (display_name, bio, accent_color, status_text)
- Auth: Gravatar fallback for avatars on register
- DB: users table now has bio, accent_color, status_text columns
- giphy/client.go: Search() and GetTrending() against Giphy API
- upload/handlers.go: MinIO file upload + serve
- config: added GiphyConfig and MinIO config
- cmd/server: wired giphy (/gifs/search, /gifs/trending), upload (/upload), files (/files/*) routes

Frontend:
- auth store: updated User interface with new profile fields, added updateProfile()
- UserSettings.tsx: terminal-styled profile editor (display_name, bio, accent_color, status_text, avatar upload)
- GiphyPicker.tsx: terminal-styled GIF picker with search + trending
- ChatArea.tsx: integrated [GIF] button into message input
- App.tsx: imports UserSettings, added /settings route

web/src/App.tsx

@@ -1,7 +1,8 @@
-import { BrowserRouter, Routes, Route, Navigate } from 'react-router-dom';
+import { BrowserRouter, Routes, Route, Navigate, Link } from 'react-router-dom';
 import { LoginForm } from './components/LoginForm.tsx';
 import { Layout } from './components/Layout.tsx';
 import { ChatArea } from './components/ChatArea.tsx';
+import { UserSettings } from './components/UserSettings.tsx';
 import { useAuthStore } from './stores/auth.ts';
 
 function ProtectedRoute({ children }: { children: React.ReactNode }) {
@@ -14,6 +15,24 @@ function App() {
     <BrowserRouter>
       <Routes>
         <Route path="/login" element={<LoginForm />} />
+        <Route
+          path="/settings"
+          element={
+            <ProtectedRoute>
+              <div className="h-full w-full flex flex-col bg-gb-bg">
+                <header className="flex items-center gap-4 px-4 py-2 border-b border-gb-bg-t bg-gb-bg-s">
+                  <Link to="/" className="text-gb-fg-f hover:text-gb-aqua font-mono text-sm">
+                    ← [BACK]
+                  </Link>
+                  <span className="text-gb-orange font-mono text-sm">SETTINGS</span>
+                </header>
+                <div className="flex-1 overflow-hidden">
+                  <UserSettings />
+                </div>
+              </div>
+            </ProtectedRoute>
+          }
+        />
         <Route
           path="/"
           element={