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/stores/auth.ts

@@ -6,10 +6,21 @@ export type UserStatus = 'online' | 'idle' | 'dnd' | 'offline';
 export interface User {
   id: string;
   username: string;
-  displayName: string;
+  display_name: string;
   email: string;
-  avatar: string | null;
+  avatar: string;
+  bio: string;
+  accent_color: string;
   status: UserStatus;
+  status_text: string;
+  created_at: string;
+}
+
+export interface UpdateProfilePayload {
+  display_name?: string;
+  bio?: string;
+  accent_color?: string;
+  status_text?: string;
 }
 
 interface AuthState {
@@ -18,9 +29,10 @@ interface AuthState {
   isLoading: boolean;
   error: string | null;
   login: (email: string, password: string) => Promise<void>;
-  register: (email: string, username: string, password: string) => Promise<void>;
+  register: (email: string, username: string, password: string, displayName?: string) => Promise<void>;
   logout: () => Promise<void>;
   fetchMe: () => Promise<void>;
+  updateProfile: (data: UpdateProfilePayload) => Promise<void>;
   clearError: () => void;
 }
 
@@ -45,10 +57,10 @@ export const useAuthStore = create<AuthState>((set) => ({
     }
   },
 
-  register: async (email, username, password) => {
+  register: async (email, username, password, displayName) => {
     set({ isLoading: true, error: null });
     try {
-      await api.post('/auth/register', { email, username, password });
+      await api.post('/auth/register', { email, username, password, display_name: displayName || username });
       const user = await api.get<User>('/auth/me');
       set({ user, isAuthenticated: true, isLoading: false });
     } catch (error) {
@@ -89,5 +101,19 @@ export const useAuthStore = create<AuthState>((set) => ({
     }
   },
 
+  updateProfile: async (data) => {
+    set({ isLoading: true, error: null });
+    try {
+      const user = await api.patch<User>('/auth/me', data);
+      set({ user, isLoading: false });
+    } catch (error) {
+      set({
+        isLoading: false,
+        error: error instanceof Error ? error.message : 'Update failed',
+      });
+      throw error;
+    }
+  },
+
   clearError: () => set({ error: null }),
 }));