refactor: full codebase cleanup, dependency updates, and lint fixes

Phase 0: Remove ~920 lines of dead code (ThemeBentoPicker, PromoDiscountBadge,
AdminLayout, SettingsSidebar, MovingGradient, EmptyState, miniapp API, unused
types/functions/transitions/skeleton helpers). Fix API barrel file (add 20 missing exports).

Phase 1: Add ErrorBoundary (app/page/widget levels), centralize constants,
add axios timeout, fix staleTime:0 in React Query.

Phase 2: Consolidate hexToHsl, extract email validation, fix duplicate code.

Phase 3: Fix auth race condition (await checkAdminStatus), memoize useCurrency,
add WebSocket message validation.

Phase 4: Extract useBranding, useFeatureFlags, useScrollRestoration from AppShell.

Phase 5: Remove all eslint-disable react-hooks/exhaustive-deps (14 total),
simplify logger, remove deprecated hooks (useBackButton, useTelegramDnd,
useTelegramWebApp).

Dependencies: React 19, react-router 7, zustand 5, i18next 25, react-i18next 16,
eslint-plugin-react-refresh 0.5. Remove unused @lottiefiles/dotlottie-react.
Convert vite manualChunks to function-based approach for react-router v7 compat.

Lint: Fix logger.ts no-unused-expressions, fix react-refresh/only-export-components
in 6 Radix primitive files (const re-exports → direct re-exports), fix
WebSocketProvider exhaustive-deps. Result: 0 errors, 0 warnings.

Add CLAUDE.md to .gitignore.

src/store/auth.ts

@@ -240,7 +240,7 @@ export const useAuthStore = create<AuthState>()(
           user: response.user,
           isAuthenticated: true,
         });
-        get().checkAdminStatus();
+        await get().checkAdminStatus();
       },
 
       loginWithTelegramWidget: async (data) => {
@@ -252,7 +252,7 @@ export const useAuthStore = create<AuthState>()(
           user: response.user,
           isAuthenticated: true,
         });
-        get().checkAdminStatus();
+        await get().checkAdminStatus();
       },
 
       loginWithEmail: async (email, password) => {
@@ -264,7 +264,7 @@ export const useAuthStore = create<AuthState>()(
           user: response.user,
           isAuthenticated: true,
         });
-        get().checkAdminStatus();
+        await get().checkAdminStatus();
       },
 
       registerWithEmail: async (email, password, firstName, referralCode) => {

src/store/successNotification.ts

@@ -1,4 +1,4 @@
-import { useEffect } from 'react';
+import { useEffect, useRef } from 'react';
 import { create } from 'zustand';
 
 export type SuccessNotificationType =
@@ -64,12 +64,13 @@ export const useSuccessNotification = create<SuccessNotificationState>((set) =>
  */
 export function useCloseOnSuccessNotification(onClose: () => void) {
   const closeOthersSignal = useSuccessNotification((state) => state.closeOthersSignal);
+  const onCloseRef = useRef(onClose);
+  onCloseRef.current = onClose;
 
   useEffect(() => {
     // Skip the initial render (signal = 0)
     if (closeOthersSignal > 0) {
-      onClose();
+      onCloseRef.current();
     }
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [closeOthersSignal]);
 }