feat: redesign wallet login and favorites, fix desktop/mobile bugs

- Remove forced BNB chain switch on injected login (signature is chain-agnostic)
- Refine isMobileDevice so touch Macs stay on desktop flow
- Wire RainbowKit/WalletConnect as a real MetaMask/imToken QR fallback,
  gated on a valid VITE_WALLETCONNECT_PROJECT_ID
- Rebuild login modal: single desktop primary action, collapsible other
  methods, mobile open-app fallback feedback, brand icons
- Add My Favorites entry points (header, mobile menu, wallet dropdown)
- Favorites page: error retry, mobile filter drawer
- Auto sign-out and re-login prompt on favorites 401
- Full native translations for all wallet strings across 7 locales

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/favorites/FavoritesProvider.tsx

@@ -11,7 +11,12 @@ import {
 import { useToast } from "../components/Toast";
 import { useI18n } from "../i18n";
 import { useWallet } from "../wallet/WalletProvider";
-import { addFavorite, getFavoriteIds, removeFavorite } from "./api";
+import {
+  addFavorite,
+  getFavoriteIds,
+  isFavoritesAuthError,
+  removeFavorite,
+} from "./api";
 
 type FavoriteStatus = "unknown" | "favorited" | "notFavorited";
 
@@ -30,7 +35,13 @@ export function FavoritesProvider({ children }: { children: ReactNode }) {
   const { t } = useI18n();
   const { showToast } = useToast();
   const wallet = useWallet();
-  const { address, openLoginModal, status, token } = wallet;
+  const { address, logout, openLoginModal, status, token } = wallet;
+
+  const handleAuthError = useCallback(() => {
+    logout();
+    openLoginModal();
+    showToast(t("favoriteSessionExpired"));
+  }, [logout, openLoginModal, showToast, t]);
   const [favoriteIds, setFavoriteIds] = useState<Set<string>>(() => new Set());
   const [knownIds, setKnownIds] = useState<Set<string>>(() => new Set());
   const [pendingIds, setPendingIds] = useState<Set<string>>(() => new Set());
@@ -113,6 +124,8 @@ export function FavoritesProvider({ children }: { children: ReactNode }) {
         ids.forEach((id) => next.add(id));
         return next;
       });
+    } catch (error) {
+      if (isFavoritesAuthError(error)) handleAuthError();
     } finally {
       requestIds.forEach((id) => inFlightIdsRef.current.delete(id));
       if (queuedIdsRef.current.size > 0 && batchTimerRef.current === null) {
@@ -122,7 +135,7 @@ export function FavoritesProvider({ children }: { children: ReactNode }) {
         }, 0);
       }
     }
-  }, []);
+  }, [handleAuthError]);
 
   const ensureFavoriteIds = useCallback(
     async (resourceIds: string[]) => {
@@ -158,7 +171,8 @@ export function FavoritesProvider({ children }: { children: ReactNode }) {
         );
       } catch (error) {
         markFavorite(resourceId, currentlyFavorite);
-        showToast(t("favoriteFailed"), "error");
+        if (isFavoritesAuthError(error)) handleAuthError();
+        else showToast(t("favoriteFailed"), "error");
         throw error;
       } finally {
         setPendingIds((prev) => {
@@ -168,7 +182,7 @@ export function FavoritesProvider({ children }: { children: ReactNode }) {
         });
       }
     },
-    [favoriteIds, markFavorite, showToast, t, token],
+    [favoriteIds, handleAuthError, markFavorite, showToast, t, token],
   );
 
   const toggleFavorite = useCallback(