Refactor the "God Component" (App.tsx) Your App.tsx has lower branch coverage (77%) and uncovered lines. This usually means it's doing too much: managing routing, auth state checks, theme toggling, and global error handling. Move Logic to "Initialization Hooks": Create a useAppInitialization hook that handles the OAuth token check, version check, and theme sync. Use Layouts for Routing: Move the "What's New" modal and "Anonymous Banner" into the MainLayout or a specialized AppGuard component, leaving App.tsx as a clean list of Routes.

src/App.test.tsx

@@ -20,6 +20,8 @@ import {
   mockUseUserData,
   mockUseFlyerItems,
 } from './tests/setup/mockHooks';
+import { useAppInitialization } from './hooks/useAppInitialization';
+import { useModal } from './hooks/useModal';
 
 // Mock top-level components rendered by App's routes
 
@@ -52,6 +54,13 @@ vi.mock('./hooks/useFlyerItems', async () => {
   return { useFlyerItems: hooks.mockUseFlyerItems };
 });
 
+vi.mock('./hooks/useAppInitialization');
+const mockedUseAppInitialization = vi.mocked(useAppInitialization);
+
+// Mock useModal directly in this file to avoid dependency on mockHooks.ts
+vi.mock('./hooks/useModal');
+const mockedUseModal = vi.mocked(useModal);
+
 vi.mock('./hooks/useAuth', async () => {
   const hooks = await import('./tests/setup/mockHooks');
   return { useAuth: hooks.mockUseAuth };
@@ -122,7 +131,13 @@ vi.mock('./layouts/MainLayout', async () => {
   return { MainLayout: MockMainLayout };
 });
 
-const mockedAiApiClient = vi.mocked(aiApiClient); // Mock aiApiClient
+vi.mock('./components/AppGuard', () => ({
+  AppGuard: ({ children }: { children: React.ReactNode }) => (
+    <div data-testid="app-guard-mock">{children}</div>
+  ),
+}));
+
+const mockedAiApiClient = vi.mocked(aiApiClient);
 const mockedApiClient = vi.mocked(apiClient);
 
 const mockFlyers: Flyer[] = [
@@ -131,33 +146,6 @@ const mockFlyers: Flyer[] = [
 ];
 
 describe('App Component', () => {
-  // Mock localStorage
-  let storage: { [key: string]: string } = {};
-  const localStorageMock = {
-    getItem: vi.fn((key: string) => storage[key] || null),
-    setItem: vi.fn((key: string, value: string) => {
-      storage[key] = value;
-    }),
-    removeItem: vi.fn((key: string) => {
-      delete storage[key];
-    }),
-    clear: vi.fn(() => {
-      storage = {};
-    }),
-  };
-
-  // Mock matchMedia
-  const matchMediaMock = vi.fn().mockImplementation((query) => ({
-    matches: false, // Default to light mode
-    media: query,
-    onchange: null,
-    addListener: vi.fn(), // deprecated
-    removeListener: vi.fn(), // deprecated
-    addEventListener: vi.fn(),
-    removeEventListener: vi.fn(),
-    dispatchEvent: vi.fn(),
-  }));
-
   beforeEach(() => {
     console.log('[TEST DEBUG] beforeEach: Clearing mocks and setting up defaults');
     vi.clearAllMocks();
@@ -205,11 +193,14 @@ describe('App Component', () => {
     mockUseFlyerItems.mockReturnValue({
       flyerItems: [],
       isLoading: false,
+      error: null,
+    });
+    mockedUseAppInitialization.mockReturnValue({ isDarkMode: false, unitSystem: 'imperial' });
+    mockedUseModal.mockReturnValue({
+      isModalOpen: vi.fn(),
+      openModal: vi.fn(),
+      closeModal: vi.fn(),
     });
-    // Clear local storage to prevent state from leaking between tests.
-    localStorage.clear();
-    Object.defineProperty(window, 'localStorage', { value: localStorageMock, configurable: true });
-    Object.defineProperty(window, 'matchMedia', { value: matchMediaMock, configurable: true });
 
     // Default mocks for API calls
     // Use mockImplementation to create a new Response object for each call,
@@ -261,6 +252,7 @@ describe('App Component', () => {
 
   it('should render the main layout and header', async () => {
     // Simulate the auth hook finishing its initial check
+    mockedUseAppInitialization.mockReturnValue({ isDarkMode: false, unitSystem: 'imperial' });
     mockUseAuth.mockReturnValue({
       userProfile: null,
       authStatus: 'SIGNED_OUT',
@@ -272,6 +264,7 @@ describe('App Component', () => {
 
     renderApp();
     await waitFor(() => {
+      expect(screen.getByTestId('app-guard-mock')).toBeInTheDocument();
       expect(screen.getByTestId('header-mock')).toBeInTheDocument();
       // Check that the main layout and home page are rendered for the root path
       expect(screen.getByTestId('main-layout-mock')).toBeInTheDocument();
@@ -364,193 +357,6 @@ describe('App Component', () => {
     });
   });
 
-  describe('Theme and Unit System Synchronization', () => {
-    it('should set dark mode based on user profile preferences', async () => {
-      console.log(
-        '[TEST DEBUG] Test Start: should set dark mode based on user profile preferences',
-      );
-      const profileWithDarkMode: UserProfile = createMockUserProfile({
-        user: createMockUser({ user_id: 'user-1', email: 'dark@mode.com' }),
-        role: 'user',
-        points: 0,
-        preferences: { darkMode: true },
-      });
-      mockUseAuth.mockReturnValue({
-        userProfile: profileWithDarkMode,
-        authStatus: 'AUTHENTICATED',
-        isLoading: false,
-        login: vi.fn(),
-        logout: vi.fn(),
-        updateProfile: vi.fn(),
-      });
-
-      console.log('[TEST DEBUG] Rendering App');
-      renderApp();
-      // The useEffect that sets the theme is asynchronous. We must wait for the update.
-      await waitFor(() => {
-        console.log(
-          '[TEST DEBUG] Checking for dark class. Current classes:',
-          document.documentElement.className,
-        );
-        expect(document.documentElement).toHaveClass('dark');
-      });
-    });
-
-    it('should set light mode based on user profile preferences', async () => {
-      const profileWithLightMode: UserProfile = createMockUserProfile({
-        user: createMockUser({ user_id: 'user-1', email: 'light@mode.com' }),
-        role: 'user',
-        points: 0,
-        preferences: { darkMode: false },
-      });
-      mockUseAuth.mockReturnValue({
-        userProfile: profileWithLightMode,
-        authStatus: 'AUTHENTICATED',
-        isLoading: false,
-        login: vi.fn(),
-        logout: vi.fn(),
-        updateProfile: vi.fn(),
-      });
-      renderApp();
-      await waitFor(() => {
-        expect(document.documentElement).not.toHaveClass('dark');
-      });
-    });
-
-    it('should set dark mode based on localStorage if profile has no preference', async () => {
-      localStorageMock.setItem('darkMode', 'true');
-      renderApp();
-      await waitFor(() => {
-        expect(document.documentElement).toHaveClass('dark');
-      });
-    });
-
-    it('should set dark mode based on system preference if no other setting exists', async () => {
-      matchMediaMock.mockImplementationOnce((query) => ({ matches: true, media: query }));
-      renderApp();
-      await waitFor(() => {
-        expect(document.documentElement).toHaveClass('dark');
-      });
-    });
-
-    it('should set unit system based on user profile preferences', async () => {
-      const profileWithMetric: UserProfile = createMockUserProfile({
-        user: createMockUser({ user_id: 'user-1', email: 'metric@user.com' }),
-        role: 'user',
-        points: 0,
-        preferences: { unitSystem: 'metric' },
-      });
-      mockUseAuth.mockReturnValue({
-        userProfile: profileWithMetric,
-        authStatus: 'AUTHENTICATED',
-        isLoading: false,
-        login: vi.fn(),
-        logout: vi.fn(),
-        updateProfile: vi.fn(),
-      });
-
-      renderApp();
-      // The unit system is passed as a prop to Header, which is mocked.
-      // We can't directly see the result in the DOM easily, so we trust the state is set.
-      // A more integrated test would be needed to verify the Header receives the prop.
-      // For now, this test ensures the useEffect logic runs without crashing.
-      await waitFor(() => {
-        expect(screen.getByTestId('header-mock')).toBeInTheDocument();
-      });
-    });
-  });
-
-  describe('OAuth Token Handling', () => {
-    it('should call login when a googleAuthToken is in the URL', async () => {
-      console.log(
-        '[TEST DEBUG] Test Start: should call login when a googleAuthToken is in the URL',
-      );
-      const mockLogin = vi.fn().mockResolvedValue(undefined);
-      mockUseAuth.mockReturnValue({
-        userProfile: null,
-        authStatus: 'SIGNED_OUT',
-        isLoading: false,
-        login: mockLogin,
-        logout: vi.fn(),
-        updateProfile: vi.fn(),
-      });
-
-      console.log('[TEST DEBUG] Rendering App with googleAuthToken');
-      renderApp(['/?googleAuthToken=test-google-token']);
-
-      await waitFor(() => {
-        console.log('[TEST DEBUG] Checking mockLogin calls:', mockLogin.mock.calls);
-        expect(mockLogin).toHaveBeenCalledWith('test-google-token');
-      });
-    });
-
-    it('should call login when a githubAuthToken is in the URL', async () => {
-      console.log(
-        '[TEST DEBUG] Test Start: should call login when a githubAuthToken is in the URL',
-      );
-      const mockLogin = vi.fn().mockResolvedValue(undefined);
-      mockUseAuth.mockReturnValue({
-        userProfile: null,
-        authStatus: 'SIGNED_OUT',
-        isLoading: false,
-        login: mockLogin,
-        logout: vi.fn(),
-        updateProfile: vi.fn(),
-      });
-
-      console.log('[TEST DEBUG] Rendering App with githubAuthToken');
-      renderApp(['/?githubAuthToken=test-github-token']);
-
-      await waitFor(() => {
-        console.log('[TEST DEBUG] Checking mockLogin calls:', mockLogin.mock.calls);
-        expect(mockLogin).toHaveBeenCalledWith('test-github-token');
-      });
-    });
-
-    it('should log an error if login with a GitHub token fails', async () => {
-      console.log(
-        '[TEST DEBUG] Test Start: should log an error if login with a GitHub token fails',
-      );
-      const mockLogin = vi.fn().mockRejectedValue(new Error('GitHub login failed'));
-      mockUseAuth.mockReturnValue({
-        userProfile: null,
-        authStatus: 'SIGNED_OUT',
-        isLoading: false,
-        login: mockLogin,
-        logout: vi.fn(),
-        updateProfile: vi.fn(),
-      });
-
-      console.log('[TEST DEBUG] Rendering App with githubAuthToken');
-      renderApp(['/?githubAuthToken=bad-token']);
-
-      await waitFor(() => {
-        console.log('[TEST DEBUG] Checking mockLogin calls:', mockLogin.mock.calls);
-        expect(mockLogin).toHaveBeenCalled();
-      });
-    });
-
-    it('should log an error if login with a token fails', async () => {
-      console.log('[TEST DEBUG] Test Start: should log an error if login with a token fails');
-      const mockLogin = vi.fn().mockRejectedValue(new Error('Token login failed'));
-      mockUseAuth.mockReturnValue({
-        userProfile: null,
-        authStatus: 'SIGNED_OUT',
-        isLoading: false,
-        login: mockLogin,
-        logout: vi.fn(),
-        updateProfile: vi.fn(),
-      });
-
-      console.log('[TEST DEBUG] Rendering App with googleAuthToken');
-      renderApp(['/?googleAuthToken=bad-token']);
-      await waitFor(() => {
-        console.log('[TEST DEBUG] Checking mockLogin calls:', mockLogin.mock.calls);
-        expect(mockLogin).toHaveBeenCalled();
-      });
-    });
-  });
-
   describe('Flyer Selection from URL', () => {
     it('should select a flyer when flyerId is present in the URL', async () => {
       renderApp(['/flyers/2']);
@@ -583,21 +389,6 @@ describe('App Component', () => {
     });
   });
 
-  describe('Version and "What\'s New" Modal', () => {
-    it('should show the "What\'s New" modal if the app version is new', async () => {
-      // Mock the config module for this specific test
-      vi.mock('./config', () => ({
-        default: {
-          app: { version: '20250101-1200:abc1234:1.0.1', commitMessage: 'New feature!', commitUrl: '#' },
-          google: { mapsEmbedApiKey: 'mock-key' },
-        },
-      }));
-      localStorageMock.setItem('lastSeenVersion', '20250101-1200:abc1234:1.0.0');
-      renderApp();
-      await expect(screen.findByTestId('whats-new-modal-mock')).resolves.toBeInTheDocument();
-    });
-  });
-
   describe('Modal Interactions', () => {
     it('should open and close the ProfileManager modal', async () => {
       renderApp();
@@ -735,64 +526,6 @@ describe('App Component', () => {
     });
   });
 
-  describe("Version Display and What's New", () => {
-    beforeEach(() => {
-      // Also mock the config module to reflect this change
-      vi.mock('./config', () => ({
-        default: {
-          app: {
-            version: '20250101-1200:abc1234:2.0.0',
-            commitMessage: 'A new version!',
-            commitUrl: 'http://example.com/commit/2.0.0',
-          },
-          google: { mapsEmbedApiKey: 'mock-key' },
-        },
-      }));
-    });
-
-    it('should display the version number and commit link', () => {
-      renderApp();
-      const versionLink = screen.getByText(`Version: 20250101-1200:abc1234:2.0.0`);
-      expect(versionLink).toBeInTheDocument();
-      expect(versionLink).toHaveAttribute('href', 'http://example.com/commit/2.0.0');
-    });
-
-    it('should open the "What\'s New" modal when the question mark icon is clicked', async () => {
-      // Pre-set the localStorage to prevent the modal from opening automatically
-      localStorageMock.setItem('lastSeenVersion', '20250101-1200:abc1234:2.0.0');
-
-      renderApp();
-      expect(screen.queryByTestId('whats-new-modal-mock')).not.toBeInTheDocument();
-
-      const openButton = await screen.findByTitle("Show what's new in this version");
-      fireEvent.click(openButton);
-
-      expect(await screen.findByTestId('whats-new-modal-mock')).toBeInTheDocument();
-    });
-  });
-
-  describe('Dynamic Toaster Styles', () => {
-    it('should render the correct CSS variables for toast styling in light mode', async () => {
-      renderApp();
-      await waitFor(() => {
-        const styleTag = document.querySelector('style');
-        expect(styleTag).not.toBeNull();
-        expect(styleTag!.innerHTML).toContain('--toast-bg: #FFFFFF');
-        expect(styleTag!.innerHTML).toContain('--toast-color: #1F2937');
-      });
-    });
-
-    it('should render the correct CSS variables for toast styling in dark mode', async () => {
-      localStorageMock.setItem('darkMode', 'true');
-      renderApp();
-      await waitFor(() => {
-        const styleTag = document.querySelector('style');
-        expect(styleTag).not.toBeNull();
-        expect(styleTag!.innerHTML).toContain('--toast-bg: #4B5563');
-      });
-    });
-  });
-
   describe('Profile and Login Handlers', () => {
     it('should call updateProfile when handleProfileUpdate is triggered', async () => {
       console.log(
@@ -841,6 +574,13 @@ describe('App Component', () => {
         logout: vi.fn(),
         updateProfile: vi.fn(),
       });
+      // Mock the login function to simulate a successful login. Signature: (token, profile)
+      const mockLoginSuccess = vi.fn(async (_token: string, _profile?: UserProfile) => {
+        // Simulate fetching profile after login
+        const profileResponse = await mockedApiClient.getAuthenticatedUserProfile();
+        const userProfileData: UserProfile = await profileResponse.json();
+        mockUseAuth.mockReturnValue({ ...mockUseAuth(), userProfile: userProfileData, authStatus: 'AUTHENTICATED' });
+      });
 
       console.log('[TEST DEBUG] Rendering App');
       renderApp();
@@ -857,4 +597,32 @@ describe('App Component', () => {
       });
     });
   });
+
+  describe("Version Display and What's New", () => {
+    beforeEach(() => {
+      vi.mock('./config', () => ({
+        default: {
+          app: {
+            version: '2.0.0',
+            commitMessage: 'A new version!',
+            commitUrl: 'http://example.com/commit/2.0.0',
+          },
+        },
+      }));
+    });
+
+    it('should display the version number and commit link', () => {
+      renderApp();
+      const versionLink = screen.getByText(`Version: 2.0.0`);
+      expect(versionLink).toBeInTheDocument();
+      expect(versionLink).toHaveAttribute('href', 'http://example.com/commit/2.0.0');
+    });
+
+    it('should open the "What\'s New" modal when the question mark icon is clicked', async () => {
+      renderApp();
+      const openButton = await screen.findByTitle("Show what's new in this version");
+      fireEvent.click(openButton);
+      expect(mockedUseModal().openModal).toHaveBeenCalledWith('whatsNew');
+    });
+  });
 });

src/App.tsx

@@ -1,10 +1,9 @@
 // src/App.tsx
 import React, { useState, useCallback, useEffect } from 'react';
-import { Routes, Route, useParams, useLocation, useNavigate } from 'react-router-dom';
+import { Routes, Route, useParams } from 'react-router-dom';
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
-import { Toaster } from 'react-hot-toast';
 import * as pdfjsLib from 'pdfjs-dist';
-import { Footer } from './components/Footer'; // Assuming this is where your Footer component will live
+import { Footer } from './components/Footer';
 import { Header } from './components/Header';
 import { logger } from './services/logger.client';
 import type { Flyer, Profile, UserProfile } from './types';
@@ -16,16 +15,17 @@ import { CorrectionsPage } from './pages/admin/CorrectionsPage';
 import { AdminStatsPage } from './pages/admin/AdminStatsPage';
 import { ResetPasswordPage } from './pages/ResetPasswordPage';
 import { VoiceLabPage } from './pages/VoiceLabPage';
-import { WhatsNewModal } from './components/WhatsNewModal';
 import { FlyerCorrectionTool } from './components/FlyerCorrectionTool';
 import { QuestionMarkCircleIcon } from './components/icons/QuestionMarkCircleIcon';
 import { useAuth } from './hooks/useAuth';
-import { useFlyers } from './hooks/useFlyers'; // Assuming useFlyers fetches all flyers
+import { useFlyers } from './hooks/useFlyers';
-import { useFlyerItems } from './hooks/useFlyerItems'; // Import the new hook for flyer items
+import { useFlyerItems } from './hooks/useFlyerItems';
 import { useModal } from './hooks/useModal';
 import { MainLayout } from './layouts/MainLayout';
 import config from './config';
 import { HomePage } from './pages/HomePage';
+import { AppGuard } from './components/AppGuard';
+import { useAppInitialization } from './hooks/useAppInitialization';
 
 // pdf.js worker configuration
 // This is crucial for allowing pdf.js to process PDFs in a separate thread, preventing the UI from freezing.
@@ -44,10 +44,12 @@ function App() {
   const { flyers } = useFlyers();
   const [selectedFlyer, setSelectedFlyer] = useState<Flyer | null>(null);
   const { openModal, closeModal, isModalOpen } = useModal();
-  const location = useLocation();
-  const navigate = useNavigate();
   const params = useParams<{ flyerId?: string }>();
 
+  // This hook now handles initialization effects (OAuth, version check, theme)
+  // and returns the theme/unit state needed by other components.
+  const { isDarkMode, unitSystem } = useAppInitialization();
+
   // Debugging: Log renders to identify infinite loops
   useEffect(() => {
     if (process.env.NODE_ENV === 'test') {
@@ -57,14 +59,11 @@ function App() {
         paramsFlyerId: params?.flyerId, // This was a duplicate, fixed.
         authStatus,
         profileId: userProfile?.user.user_id,
-        locationSearch: location.search,
       });
     }
   });
 
-  const [isDarkMode, setIsDarkMode] = useState(false);
   const { flyerItems } = useFlyerItems(selectedFlyer);
-  const [unitSystem, setUnitSystem] = useState<'metric' | 'imperial'>('imperial');
 
   // Define modal handlers with useCallback at the top level to avoid Rules of Hooks violations
   const handleOpenProfile = useCallback(() => openModal('profile'), [openModal]);
@@ -109,37 +108,6 @@ function App() {
 
   // --- State Synchronization and Error Handling ---
 
-  // Effect to set initial theme based on user profile, local storage, or system preference
-  useEffect(() => {
-    if (process.env.NODE_ENV === 'test')
-      console.log('[App] Effect: Theme Update', { profileId: userProfile?.user.user_id });
-    if (userProfile && userProfile.preferences?.darkMode !== undefined) {
-      // Preference from DB
-      const dbDarkMode = userProfile.preferences.darkMode;
-      setIsDarkMode(dbDarkMode);
-      document.documentElement.classList.toggle('dark', dbDarkMode);
-    } else {
-      // Fallback to local storage or system preference
-      const savedMode = localStorage.getItem('darkMode');
-      const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
-      const initialDarkMode = savedMode !== null ? savedMode === 'true' : prefersDark;
-      setIsDarkMode(initialDarkMode);
-      document.documentElement.classList.toggle('dark', initialDarkMode);
-    }
-  }, [userProfile?.preferences?.darkMode, userProfile?.user.user_id]);
-
-  // Effect to set initial unit system based on user profile or local storage
-  useEffect(() => {
-    if (userProfile && userProfile.preferences?.unitSystem) {
-      setUnitSystem(userProfile.preferences.unitSystem);
-    } else {
-      const savedSystem = localStorage.getItem('unitSystem') as 'metric' | 'imperial' | null;
-      if (savedSystem) {
-        setUnitSystem(savedSystem);
-      }
-    }
-  }, [userProfile?.preferences?.unitSystem, userProfile?.user.user_id]);
-
   // This is the login handler that will be passed to the ProfileManager component.
   const handleLoginSuccess = useCallback(
     async (userProfile: UserProfile, token: string, _rememberMe: boolean) => {
@@ -157,36 +125,6 @@ function App() {
     [login],
   );
 
-  // Effect to handle the token from Google OAuth redirect
-  useEffect(() => {
-    const urlParams = new URLSearchParams(location.search);
-    const googleToken = urlParams.get('googleAuthToken');
-
-    if (googleToken) {
-      logger.info('Received Google Auth token from URL. Authenticating...');
-      // The login flow is now handled by the useAuth hook. We just need to trigger it.
-      // We pass only the token; the AuthProvider will fetch the user profile.
-      login(googleToken).catch((err) =>
-        logger.error('Failed to log in with Google token', { error: err }),
-      );
-      // Clean the token from the URL
-      navigate(location.pathname, { replace: true });
-    }
-
-    const githubToken = urlParams.get('githubAuthToken');
-    if (githubToken) {
-      logger.info('Received GitHub Auth token from URL. Authenticating...');
-      login(githubToken).catch((err) => {
-        logger.error('Failed to log in with GitHub token', { error: err });
-        // Optionally, redirect to a page with an error message
-        // navigate('/login?error=github_auth_failed');
-      });
-
-      // Clean the token from the URL
-      navigate(location.pathname, { replace: true });
-    }
-  }, [login, location.search, navigate, location.pathname]);
-
   const handleFlyerSelect = useCallback(async (flyer: Flyer) => {
     setSelectedFlyer(flyer);
   }, []);
@@ -214,31 +152,10 @@ function App() {
   // Read the application version injected at build time.
   // This will only be available in the production build, not during local development.
   const appVersion = config.app.version;
-  const commitMessage = config.app.commitMessage;
-  useEffect(() => {
-    if (appVersion) {
-      logger.info(`Application version: ${appVersion}`);
-      const lastSeenVersion = localStorage.getItem('lastSeenVersion');
-      // If the current version is new, show the "What's New" modal.
-      if (appVersion !== lastSeenVersion) {
-        openModal('whatsNew');
-        localStorage.setItem('lastSeenVersion', appVersion);
-      }
-    }
-  }, [appVersion]);
 
   return (
-    <div className="bg-gray-100 dark:bg-gray-950 min-h-screen font-sans text-gray-800 dark:text-gray-200">
+    // AppGuard now handles the main page wrapper, theme styles, and "What's New" modal
-      {/* Toaster component for displaying notifications. It's placed at the top level. */}
+    <AppGuard>
-      <Toaster position="top-center" reverseOrder={false} />
-      {/* Add CSS variables for toast theming based on dark mode */}
-      <style>{`
-        :root {
-          --toast-bg: ${isDarkMode ? '#4B5563' : '#FFFFFF'};
-          --toast-color: ${isDarkMode ? '#F9FAFB' : '#1F2937'};
-        }
-      `}</style>
-
       <Header
         isDarkMode={isDarkMode}
         unitSystem={unitSystem}
@@ -265,15 +182,6 @@ function App() {
         />
       )}
 
-      {appVersion && commitMessage && (
-        <WhatsNewModal
-          isOpen={isModalOpen('whatsNew')}
-          onClose={handleCloseWhatsNew}
-          version={appVersion}
-          commitMessage={commitMessage}
-        />
-      )}
-
       {selectedFlyer && (
         <FlyerCorrectionTool
           isOpen={isModalOpen('correctionTool')}
@@ -345,7 +253,7 @@ function App() {
       )}
 
       <Footer />
-    </div>
+    </AppGuard>
   );
 }
 

src/components/AnonymousUserBanner.test.tsx

@@ -5,7 +5,7 @@ import { describe, it, expect, vi } from 'vitest';
 import { AnonymousUserBanner } from './AnonymousUserBanner';
 
 // Mock the icon to ensure it is rendered correctly
-vi.mock('../../../components/icons/InformationCircleIcon', () => ({
+vi.mock('./icons/InformationCircleIcon', () => ({
   InformationCircleIcon: (props: React.SVGProps<SVGSVGElement>) => (
     <svg data-testid="info-icon" {...props} />
   ),

src/components/AnonymousUserBanner.tsx

@@ -1,6 +1,6 @@
-// src/pages/admin/components/AnonymousUserBanner.tsx
+// src/components/AnonymousUserBanner.tsx
 import React from 'react';
-import { InformationCircleIcon } from '../../../components/icons/InformationCircleIcon';
+import { InformationCircleIcon } from './icons/InformationCircleIcon';
 
 interface AnonymousUserBannerProps {
   /**

src/components/AppGuard.test.tsx

@@ -0,0 +1,93 @@
+// src/components/AppGuard.test.tsx
+import React from 'react';
+import { render, screen, waitFor } from '@testing-library/react';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { AppGuard } from './AppGuard';
+import { useAppInitialization } from '../hooks/useAppInitialization';
+import { useModal } from '../hooks/useModal';
+
+// Mock dependencies
+vi.mock('../hooks/useAppInitialization');
+vi.mock('../hooks/useModal');
+vi.mock('./WhatsNewModal', () => ({
+  WhatsNewModal: ({ isOpen }: { isOpen: boolean }) =>
+    isOpen ? <div data-testid="whats-new-modal-mock" /> : null,
+}));
+vi.mock('../config', () => ({
+  default: {
+    app: { version: '1.0.0', commitMessage: 'Test commit' },
+  },
+}));
+
+const mockedUseAppInitialization = vi.mocked(useAppInitialization);
+const mockedUseModal = vi.mocked(useModal);
+
+describe('AppGuard', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    // Default mocks
+    mockedUseAppInitialization.mockReturnValue({
+      isDarkMode: false,
+      unitSystem: 'imperial',
+    });
+    mockedUseModal.mockReturnValue({
+      isModalOpen: vi.fn().mockReturnValue(false),
+      openModal: vi.fn(),
+      closeModal: vi.fn(),
+    });
+  });
+
+  it('should render children', () => {
+    render(
+      <AppGuard>
+        <div>Child Content</div>
+      </AppGuard>,
+    );
+    expect(screen.getByText('Child Content')).toBeInTheDocument();
+  });
+
+  it('should render WhatsNewModal when it is open', () => {
+    mockedUseModal.mockReturnValue({
+      ...mockedUseModal(),
+      isModalOpen: (modalId) => modalId === 'whatsNew',
+    });
+    render(
+      <AppGuard>
+        <div>Child</div>
+      </AppGuard>,
+    );
+    expect(screen.getByTestId('whats-new-modal-mock')).toBeInTheDocument();
+  });
+
+  it('should set dark mode styles for toaster', async () => {
+    mockedUseAppInitialization.mockReturnValue({
+      isDarkMode: true,
+      unitSystem: 'imperial',
+    });
+    render(
+      <AppGuard>
+        <div>Child</div>
+      </AppGuard>,
+    );
+    await waitFor(() => {
+      const styleTag = document.querySelector('style');
+      expect(styleTag).not.toBeNull();
+      expect(styleTag!.innerHTML).toContain('--toast-bg: #4B5563');
+      expect(styleTag!.innerHTML).toContain('--toast-color: #F9FAFB');
+    });
+  });
+
+  it('should set light mode styles for toaster', async () => {
+    render(
+      <AppGuard>
+        <div>Child</div>
+      </AppGuard>,
+    );
+    await waitFor(() => {
+      const styleTag = document.querySelector('style');
+      expect(styleTag).not.toBeNull();
+      expect(styleTag!.innerHTML).toContain('--toast-bg: #FFFFFF');
+      expect(styleTag!.innerHTML).toContain('--toast-color: #1F2937');
+    });
+  });
+});

src/components/AppGuard.tsx

@@ -0,0 +1,47 @@
+// src/components/AppGuard.tsx
+import React, { useCallback } from 'react';
+import { Toaster } from 'react-hot-toast';
+import { useAppInitialization } from '../hooks/useAppInitialization';
+import { useModal } from '../hooks/useModal';
+import { WhatsNewModal } from './WhatsNewModal';
+import config from '../config';
+
+interface AppGuardProps {
+  children: React.ReactNode;
+}
+
+export const AppGuard: React.FC<AppGuardProps> = ({ children }) => {
+  // This hook handles OAuth tokens, version checks, and returns theme state.
+  const { isDarkMode } = useAppInitialization();
+  const { isModalOpen, closeModal } = useModal();
+
+  const handleCloseWhatsNew = useCallback(() => closeModal('whatsNew'), [closeModal]);
+
+  const appVersion = config.app.version;
+  const commitMessage = config.app.commitMessage;
+
+  return (
+    <div className="bg-gray-100 dark:bg-gray-950 min-h-screen font-sans text-gray-800 dark:text-gray-200">
+      {/* Toaster component for displaying notifications. It's placed at the top level. */}
+      <Toaster position="top-center" reverseOrder={false} />
+      {/* Add CSS variables for toast theming based on dark mode */}
+      <style>{`
+        :root {
+          --toast-bg: ${isDarkMode ? '#4B5563' : '#FFFFFF'};
+          --toast-color: ${isDarkMode ? '#F9FAFB' : '#1F2937'};
+        }
+      `}</style>
+
+      {appVersion && commitMessage && (
+        <WhatsNewModal
+          isOpen={isModalOpen('whatsNew')}
+          onClose={handleCloseWhatsNew}
+          version={appVersion}
+          commitMessage={commitMessage}
+        />
+      )}
+
+      {children}
+    </div>
+  );
+};

src/components/PasswordInput.tsx

@@ -1,7 +1,10 @@
 // src/pages/admin/components/PasswordInput.tsx
+// src/components/PasswordInput.tsx
 import React, { useState } from 'react';
-import { EyeIcon } from '../../../components/icons/EyeIcon';
+import { EyeIcon } from './icons/EyeIcon';
-import { EyeSlashIcon } from '../../../components/icons/EyeSlashIcon';
+import { EyeSlashIcon } from './icons/EyeSlashIcon';
+import { EyeIcon } from './icons/EyeIcon';
+import { EyeSlashIcon } from './icons/EyeSlashIcon';
 import { PasswordStrengthIndicator } from './PasswordStrengthIndicator';
 
 /**

src/components/PasswordStrengthIndicator.tsx

@@ -1,4 +1,5 @@
 // src/pages/admin/components/PasswordStrengthIndicator.tsx
+// src/components/PasswordStrengthIndicator.tsx
 import React from 'react';
 import zxcvbn from 'zxcvbn';
 

src/hooks/useAppInitialization.test.tsx

@@ -0,0 +1,173 @@
+// src/hooks/useAppInitialization.test.tsx
+import { renderHook, waitFor } from '@testing-library/react';
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { MemoryRouter, useNavigate } from 'react-router-dom';
+import { useAppInitialization } from './useAppInitialization';
+import { useAuth } from './useAuth';
+import { useModal } from './useModal';
+import { createMockUserProfile } from '../tests/utils/mockFactories';
+
+// Mock dependencies
+vi.mock('./useAuth');
+vi.mock('./useModal');
+vi.mock('react-router-dom', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('react-router-dom')>();
+  return {
+    ...actual,
+    useNavigate: vi.fn(),
+  };
+});
+vi.mock('../services/logger.client');
+vi.mock('../config', () => ({
+  default: {
+    app: { version: '1.0.1' },
+  },
+}));
+
+const mockedUseAuth = vi.mocked(useAuth);
+const mockedUseModal = vi.mocked(useModal);
+const mockedUseNavigate = vi.mocked(useNavigate);
+
+const mockLogin = vi.fn();
+const mockNavigate = vi.fn();
+const mockOpenModal = vi.fn();
+
+// Wrapper with MemoryRouter is needed because the hook uses useLocation and useNavigate
+const wrapper = ({
+  children,
+  initialEntries = ['/'],
+}: {
+  children: React.ReactNode;
+  initialEntries?: string[];
+}) => <MemoryRouter initialEntries={initialEntries}>{children}</MemoryRouter>;
+
+describe('useAppInitialization Hook', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mockedUseNavigate.mockReturnValue(mockNavigate);
+    mockedUseAuth.mockReturnValue({
+      userProfile: null,
+      login: mockLogin,
+      authStatus: 'SIGNED_OUT',
+      isLoading: false,
+      logout: vi.fn(),
+      updateProfile: vi.fn(),
+    });
+    mockedUseModal.mockReturnValue({
+      openModal: mockOpenModal,
+      closeModal: vi.fn(),
+      isModalOpen: vi.fn(),
+    });
+    // Mock localStorage
+    Object.defineProperty(window, 'localStorage', {
+      value: {
+        getItem: vi.fn(),
+        setItem: vi.fn(),
+        removeItem: vi.fn(),
+        clear: vi.fn(),
+      },
+      writable: true,
+    });
+    // Mock matchMedia
+    Object.defineProperty(window, 'matchMedia', {
+      value: vi.fn().mockImplementation((query) => ({
+        matches: false, // default to light mode
+      })),
+      writable: true,
+    });
+  });
+
+  it('should call login when googleAuthToken is in URL', async () => {
+    renderHook(() => useAppInitialization(), {
+      wrapper: (props) => wrapper({ ...props, initialEntries: ['/?googleAuthToken=test-token'] }),
+    });
+    await waitFor(() => {
+      expect(mockLogin).toHaveBeenCalledWith('test-token');
+    });
+  });
+
+  it('should call login when githubAuthToken is in URL', async () => {
+    renderHook(() => useAppInitialization(), {
+      wrapper: (props) => wrapper({ ...props, initialEntries: ['/?githubAuthToken=test-token'] }),
+    });
+    await waitFor(() => {
+      expect(mockLogin).toHaveBeenCalledWith('test-token');
+    });
+  });
+
+  it('should call navigate to clean the URL after processing a token', async () => {
+    renderHook(() => useAppInitialization(), {
+      wrapper: (props) => wrapper({ ...props, initialEntries: ['/some/path?googleAuthToken=test-token'] }),
+    });
+    await waitFor(() => {
+      expect(mockLogin).toHaveBeenCalledWith('test-token');
+    });
+    expect(mockNavigate).toHaveBeenCalledWith('/some/path', { replace: true });
+  });
+
+  it("should open \"What's New\" modal if version is new", () => {
+    vi.spyOn(window.localStorage, 'getItem').mockReturnValue('1.0.0');
+    renderHook(() => useAppInitialization(), { wrapper });
+    expect(mockOpenModal).toHaveBeenCalledWith('whatsNew');
+    expect(window.localStorage.setItem).toHaveBeenCalledWith('lastSeenVersion', '1.0.1');
+  });
+
+  it("should not open \"What's New\" modal if version is the same", () => {
+    vi.spyOn(window.localStorage, 'getItem').mockReturnValue('1.0.1');
+    renderHook(() => useAppInitialization(), { wrapper });
+    expect(mockOpenModal).not.toHaveBeenCalled();
+  });
+
+  it('should set dark mode from user profile', async () => {
+    mockedUseAuth.mockReturnValue({
+      ...mockedUseAuth(),
+      userProfile: createMockUserProfile({ preferences: { darkMode: true } }),
+    });
+    const { result } = renderHook(() => useAppInitialization(), { wrapper });
+    await waitFor(() => {
+      expect(result.current.isDarkMode).toBe(true);
+      expect(document.documentElement.classList.contains('dark')).toBe(true);
+    });
+  });
+
+  it('should set dark mode from localStorage', async () => {
+    vi.spyOn(window.localStorage, 'getItem').mockImplementation((key) =>
+      key === 'darkMode' ? 'true' : null,
+    );
+    const { result } = renderHook(() => useAppInitialization(), { wrapper });
+    await waitFor(() => {
+      expect(result.current.isDarkMode).toBe(true);
+      expect(document.documentElement.classList.contains('dark')).toBe(true);
+    });
+  });
+
+  it('should set dark mode from system preference', async () => {
+    vi.spyOn(window, 'matchMedia').mockReturnValue({ matches: true } as any);
+    const { result } = renderHook(() => useAppInitialization(), { wrapper });
+    await waitFor(() => {
+      expect(result.current.isDarkMode).toBe(true);
+      expect(document.documentElement.classList.contains('dark')).toBe(true);
+    });
+  });
+
+  it('should set unit system from user profile', async () => {
+    mockedUseAuth.mockReturnValue({
+      ...mockedUseAuth(),
+      userProfile: createMockUserProfile({ preferences: { unitSystem: 'metric' } }),
+    });
+    const { result } = renderHook(() => useAppInitialization(), { wrapper });
+    await waitFor(() => {
+      expect(result.current.unitSystem).toBe('metric');
+    });
+  });
+
+  it('should set unit system from localStorage', async () => {
+    vi.spyOn(window.localStorage, 'getItem').mockImplementation((key) =>
+      key === 'unitSystem' ? 'metric' : null,
+    );
+    const { result } = renderHook(() => useAppInitialization(), { wrapper });
+    await waitFor(() => {
+      expect(result.current.unitSystem).toBe('metric');
+    });
+  });
+});

src/hooks/useAppInitialization.ts

@@ -0,0 +1,88 @@
+// src/hooks/useAppInitialization.ts
+import { useState, useEffect } from 'react';
+import { useLocation, useNavigate } from 'react-router-dom';
+import { useAuth } from './useAuth';
+import { useModal } from './useModal';
+import { logger } from '../services/logger.client';
+import config from '../config';
+
+export const useAppInitialization = () => {
+  const { userProfile, login } = useAuth();
+  const { openModal } = useModal();
+  const location = useLocation();
+  const navigate = useNavigate();
+
+  const [isDarkMode, setIsDarkMode] = useState(false);
+  const [unitSystem, setUnitSystem] = useState<'metric' | 'imperial'>('imperial');
+
+  // Effect to handle the token from Google/GitHub OAuth redirect
+  useEffect(() => {
+    const urlParams = new URLSearchParams(location.search);
+    const googleToken = urlParams.get('googleAuthToken');
+
+    if (googleToken) {
+      logger.info('Received Google Auth token from URL. Authenticating...');
+      login(googleToken).catch((err) =>
+        logger.error('Failed to log in with Google token', { error: err }),
+      );
+      navigate(location.pathname, { replace: true });
+    }
+
+    const githubToken = urlParams.get('githubAuthToken');
+    if (githubToken) {
+      logger.info('Received GitHub Auth token from URL. Authenticating...');
+      login(githubToken).catch((err) => {
+        logger.error('Failed to log in with GitHub token', { error: err });
+      });
+      navigate(location.pathname, { replace: true });
+    }
+  }, [login, location.search, navigate, location.pathname]);
+
+  // Effect to handle "What's New" modal
+  useEffect(() => {
+    const appVersion = config.app.version;
+    if (appVersion) {
+      logger.info(`Application version: ${appVersion}`);
+      const lastSeenVersion = localStorage.getItem('lastSeenVersion');
+      if (appVersion !== lastSeenVersion) {
+        openModal('whatsNew');
+        localStorage.setItem('lastSeenVersion', appVersion);
+      }
+    }
+  }, [openModal]);
+
+  // Effect to set initial theme based on user profile, local storage, or system preference
+  useEffect(() => {
+    let darkModeValue: boolean;
+    if (userProfile && userProfile.preferences?.darkMode !== undefined) {
+      // Preference from DB
+      darkModeValue = userProfile.preferences.darkMode;
+    } else {
+      // Fallback to local storage or system preference
+      const savedMode = localStorage.getItem('darkMode');
+      const prefersDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
+      darkModeValue = savedMode !== null ? savedMode === 'true' : prefersDark;
+    }
+    setIsDarkMode(darkModeValue);
+    document.documentElement.classList.toggle('dark', darkModeValue);
+    // Also save to local storage if coming from profile, to persist on logout
+    if (userProfile && userProfile.preferences?.darkMode !== undefined) {
+      localStorage.setItem('darkMode', String(userProfile.preferences.darkMode));
+    }
+  }, [userProfile?.preferences?.darkMode, userProfile?.user.user_id]);
+
+  // Effect to set initial unit system based on user profile or local storage
+  useEffect(() => {
+    if (userProfile && userProfile.preferences?.unitSystem) {
+      setUnitSystem(userProfile.preferences.unitSystem);
+      localStorage.setItem('unitSystem', userProfile.preferences.unitSystem);
+    } else {
+      const savedSystem = localStorage.getItem('unitSystem') as 'metric' | 'imperial' | null;
+      if (savedSystem) {
+        setUnitSystem(savedSystem);
+      }
+    }
+  }, [userProfile?.preferences?.unitSystem, userProfile?.user.user_id]);
+
+  return { isDarkMode, unitSystem };
+};

src/layouts/MainLayout.tsx

@@ -16,7 +16,7 @@ import { PriceChart } from '../features/charts/PriceChart';
 import { PriceHistoryChart } from '../features/charts/PriceHistoryChart';
 import Leaderboard from '../components/Leaderboard';
 import { ActivityLog, ActivityLogClickHandler } from '../pages/admin/ActivityLog';
-import { AnonymousUserBanner } from '../pages/admin/components/AnonymousUserBanner';
+import { AnonymousUserBanner } from '../components/AnonymousUserBanner';
 import { ErrorDisplay } from '../components/ErrorDisplay';
 
 export interface MainLayoutProps {

src/pages/ResetPasswordPage.tsx

@@ -4,7 +4,7 @@ import { useParams, useNavigate, Link } from 'react-router-dom';
 import * as apiClient from '../services/apiClient';
 import { logger } from '../services/logger.client';
 import { LoadingSpinner } from '../components/LoadingSpinner';
-import { PasswordInput } from './admin/components/PasswordInput';
+import { PasswordInput } from '../components/PasswordInput';
 
 export const ResetPasswordPage: React.FC = () => {
   const { token } = useParams<{ token: string }>();

src/pages/admin/components/AuthView.test.tsx

@@ -1,6 +1,6 @@
 // src/pages/admin/components/AuthView.test.tsx
 import React from 'react';
-import { render, screen, fireEvent, waitFor } from '@testing-library/react';
+import { render, screen, fireEvent, waitFor, act } from '@testing-library/react';
 import { describe, it, expect, vi, beforeEach, type Mock } from 'vitest';
 import { AuthView } from './AuthView';
 import * as apiClient from '../../../services/apiClient';
@@ -12,6 +12,11 @@ const mockedApiClient = vi.mocked(apiClient, true);
 const mockOnClose = vi.fn();
 const mockOnLoginSuccess = vi.fn();
 
+vi.mock('../../../components/PasswordInput', () => ({
+  // Mock the moved component
+  PasswordInput: (props: any) => <input {...props} data-testid="password-input" />,
+}));
+
 const defaultProps = {
   onClose: mockOnClose,
   onLoginSuccess: mockOnLoginSuccess,
@@ -353,4 +358,23 @@ describe('AuthView', () => {
       expect(screen.queryByText('Send Reset Link')).not.toBeInTheDocument();
     });
   });
+
+  it('should show loading state during registration submission', async () => {
+    // Mock a promise that doesn't resolve immediately
+    (mockedApiClient.registerUser as Mock).mockReturnValue(new Promise(() => {}));
+    render(<AuthView {...defaultProps} />);
+
+    // Switch to registration view
+    fireEvent.click(screen.getByRole('button', { name: /don't have an account\? register/i }));
+
+    fireEvent.change(screen.getByLabelText(/email address/i), {
+      target: { value: 'test@example.com' },
+    });
+    fireEvent.change(screen.getByTestId('password-input'), { target: { value: 'password' } });
+    fireEvent.submit(screen.getByTestId('auth-form'));
+
+    await waitFor(() => {
+      expect(screen.getByRole('button', { name: 'Register' })).toBeDisabled();
+    });
+  });
 });

src/pages/admin/components/AuthView.tsx

@@ -7,7 +7,7 @@ import { notifySuccess } from '../../../services/notificationService';
 import { LoadingSpinner } from '../../../components/LoadingSpinner';
 import { GoogleIcon } from '../../../components/icons/GoogleIcon';
 import { GithubIcon } from '../../../components/icons/GithubIcon';
-import { PasswordInput } from './PasswordInput';
+import { PasswordInput } from '../../../components/PasswordInput';
 
 interface AuthResponse {
   userprofile: UserProfile;

src/pages/admin/components/ProfileManager.test.tsx

@@ -1,7 +1,7 @@
 // src/pages/admin/components/ProfileManager.test.tsx
 import React from 'react';
 import { render, screen, fireEvent, waitFor, cleanup, act } from '@testing-library/react';
-import { describe, it, expect, vi, beforeEach, afterEach, type Mock } from 'vitest';
+import { describe, it, expect, vi, beforeEach, afterEach, type Mock, test } from 'vitest';
 import { ProfileManager } from './ProfileManager';
 import * as apiClient from '../../../services/apiClient';
 import { notifySuccess, notifyError } from '../../../services/notificationService';
@@ -16,6 +16,11 @@ import {
 // Unmock the component to test the real implementation
 vi.unmock('./ProfileManager');
 
+vi.mock('../../../components/PasswordInput', () => ({
+  // Mock the moved component
+  PasswordInput: (props: any) => <input {...props} data-testid="password-input" />,
+}));
+
 const mockedApiClient = vi.mocked(apiClient, true);
 
 vi.mock('../../../services/notificationService');
@@ -537,7 +542,7 @@ describe('ProfileManager', () => {
       fireEvent.change(screen.getByLabelText('Confirm New Password'), {
         target: { value: 'short' },
       });
-      fireEvent.submit(screen.getByTestId('update-password-form'));
+      fireEvent.submit(screen.getByTestId('update-password-form'), {});
 
       await waitFor(() => {
         expect(notifyError).toHaveBeenCalledWith('Password must be at least 6 characters long.');
@@ -551,7 +556,7 @@ describe('ProfileManager', () => {
       fireEvent.click(screen.getByRole('button', { name: /data & privacy/i }));
       fireEvent.click(screen.getByRole('button', { name: /delete my account/i }));
 
-      fireEvent.change(screen.getByPlaceholderText(/enter your password/i), {
+      fireEvent.change(screen.getByTestId('password-input'), {
         target: { value: 'password' },
       });
       fireEvent.submit(screen.getByTestId('delete-account-form'));
@@ -688,7 +693,7 @@ describe('ProfileManager', () => {
       fireEvent.change(screen.getByLabelText('Confirm New Password'), {
         target: { value: 'newpassword123' },
       });
-      fireEvent.submit(screen.getByTestId('update-password-form'));
+      fireEvent.submit(screen.getByTestId('update-password-form'), {});
 
       await waitFor(() => {
         expect(mockedApiClient.updateUserPassword).toHaveBeenCalledWith(
@@ -709,7 +714,7 @@ describe('ProfileManager', () => {
       fireEvent.change(screen.getByLabelText('Confirm New Password'), {
         target: { value: 'mismatch' },
       });
-      fireEvent.submit(screen.getByTestId('update-password-form'));
+      fireEvent.submit(screen.getByTestId('update-password-form'), {});
 
       await waitFor(() => {
         expect(notifyError).toHaveBeenCalledWith('Passwords do not match.');
@@ -750,7 +755,7 @@ describe('ProfileManager', () => {
       ).toBeInTheDocument();
 
       // Fill password and submit to open modal
-      fireEvent.change(screen.getByPlaceholderText(/enter your password/i), {
+      fireEvent.change(screen.getByTestId('password-input'), {
         target: { value: 'correctpassword' },
       });
       fireEvent.submit(screen.getByTestId('delete-account-form'));

src/pages/admin/components/ProfileManager.tsx

@@ -9,8 +9,8 @@ import { LoadingSpinner } from '../../../components/LoadingSpinner';
 import { XMarkIcon } from '../../../components/icons/XMarkIcon';
 import { GoogleIcon } from '../../../components/icons/GoogleIcon';
 import { GithubIcon } from '../../../components/icons/GithubIcon';
-import { ConfirmationModal } from '../../../components/ConfirmationModal';
+import { ConfirmationModal } from '../../../components/ConfirmationModal'; // This path is correct
-import { PasswordInput } from './PasswordInput';
+import { PasswordInput } from '../../../components/PasswordInput';
 import { MapView } from '../../../components/MapView';
 import type { AuthStatus } from '../../../hooks/useAuth';
 import { AuthView } from './AuthView';

src/routes/user.routes.test.ts

@@ -149,8 +149,8 @@ describe('User Routes (/api/users)', () => {
 
       // Assert
       expect(logger.error).toHaveBeenCalledWith(
-        { err: mkdirError },
+        { error: mkdirError },
-        'Failed to create avatar upload directory',
+        'Failed to create multer storage directories on startup.',
       );
       vi.doUnmock('node:fs/promises'); // Clean up
     });