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/tsconfig.app.tsbuildinfo

@@ -1 +1 @@
-{"root":["./src/App.tsx","./src/main.tsx","./src/components/ChannelList.tsx","./src/components/ChatArea.tsx","./src/components/Layout.tsx","./src/components/LoginForm.tsx","./src/components/MemberList.tsx","./src/components/ServerBar.tsx","./src/lib/api.ts","./src/stores/auth.ts","./src/stores/channel.ts","./src/stores/message.ts","./src/stores/server.ts","./src/stores/ws.ts"],"version":"5.9.3"}
+{"root":["./src/App.tsx","./src/main.tsx","./src/components/ChannelList.tsx","./src/components/ChatArea.tsx","./src/components/GiphyPicker.tsx","./src/components/Layout.tsx","./src/components/LoginForm.tsx","./src/components/MemberList.tsx","./src/components/ServerBar.tsx","./src/components/UserSettings.tsx","./src/lib/api.ts","./src/stores/auth.ts","./src/stores/channel.ts","./src/stores/message.ts","./src/stores/server.ts","./src/stores/ws.ts"],"version":"5.9.3"}