frontend/src/components/ErrorBoundary.tsx

@@ -1,4 +1,5 @@
-import React, { Component, ReactNode } from 'react';
+import React, { Component } from 'react';
+import type { ReactNode } from 'react';
 import { AlertTriangle } from 'lucide-react';
 import { Button } from './ui';
 
@@ -22,7 +23,7 @@ export class ErrorBoundary extends Component<Props, State> {
     };
   }
 
-  static getDerivedStateFromError(error: Error): Partial<State> {
+  static getDerivedStateFromError(_error: Error): Partial<State> {
     return { hasError: true };
   }
 
@@ -57,7 +58,7 @@ export class ErrorBoundary extends Component<Props, State> {
             <p className="text-gray-600 dark:text-gray-400 mb-6">
               We're sorry, but something unexpected happened. Please try refreshing the page or going back to the home page.
             </p>
-            {process.env.NODE_ENV === 'development' && this.state.error && (
+            {import.meta.env.DEV && this.state.error && (
               <div className="mb-6 p-4 bg-red-50 dark:bg-red-900/10 rounded-lg text-left">
                 <p className="text-sm font-mono text-red-800 dark:text-red-300 break-all">
                   {this.state.error.toString()}

frontend/src/components/ShoppingListModal.tsx

@@ -1,4 +1,3 @@
-import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
 import { ShoppingCart, CheckCheck, Trash2 } from 'lucide-react';
 import { useShoppingList, useConfirm } from '../hooks';
@@ -16,7 +15,6 @@ export default function ShoppingListModal({ familyId, onClose }: ShoppingListMod
   const { t } = useTranslation();
   const { items, loading, createItem, deleteItem, togglePurchased, markAllAsPurchased, clearAll } = useShoppingList(familyId);
   const { confirmState, confirm, cancel } = useConfirm();
-  const [pendingAction, setPendingAction] = useState<{ type: 'delete' | 'markAll' | 'clearAll'; itemId?: number } | null>(null);
 
   const stats = shoppingService.getStats(items);
 
@@ -25,24 +23,18 @@ export default function ShoppingListModal({ familyId, onClose }: ShoppingListMod
   };
 
   const handleDelete = async (itemId: number) => {
-    setPendingAction({ type: 'delete', itemId });
     await confirm(t('shopping.deleteConfirm'), t('shopping.deleteMessage'));
     await deleteItem(itemId);
-    setPendingAction(null);
   };
 
   const handleMarkAll = async () => {
-    setPendingAction({ type: 'markAll' });
     await confirm(t('shopping.markAllConfirm'), t('shopping.markAllMessage'));
     await markAllAsPurchased();
-    setPendingAction(null);
   };
 
   const handleClearAll = async () => {
-    setPendingAction({ type: 'clearAll' });
     await confirm(t('shopping.clearAllConfirm'), t('shopping.clearAllMessage'));
     await clearAll();
-    setPendingAction(null);
   };
 
   const handleUpdate = async (itemId: number, name: string) => {

frontend/src/components/family/AddCategorySection.tsx

@@ -2,7 +2,7 @@ import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Plus, X } from 'lucide-react';
 import { Button, Input } from '../ui';
-import { CreateCategoryRequest } from '../../types';
+import type { CreateCategoryRequest } from '../../types';
 
 interface AddCategorySectionProps {
   showForm: boolean;

frontend/src/components/family/CategoryCard.tsx

@@ -1,11 +1,11 @@
 import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Tag, TrendingDown, Plus, Trash2, RotateCcw, History, X, DollarSign, MessageSquare, Calendar } from 'lucide-react';
-import { CategoryWithRemaining } from '../../services';
+import type { CategoryWithRemaining } from '../../services';
 import { categoryService, expenseService } from '../../services';
 import { useExpenses } from '../../hooks';
 import { format } from '../../utils/format';
-import { Button, Input, Badge } from '../ui';
+import { Button, Input } from '../ui';
 
 interface CategoryCardProps {
   category: CategoryWithRemaining;

frontend/src/components/family/CategoryList.tsx

@@ -1,4 +1,4 @@
-import { CategoryWithRemaining } from '../../services';
+import type { CategoryWithRemaining } from '../../services';
 import { CategoryCard } from './CategoryCard';
 
 interface CategoryListProps {

frontend/src/components/family/FamilySummary.tsx

@@ -1,6 +1,6 @@
 import { Wallet, ShoppingCart } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
-import { CategoryWithRemaining } from '../../services';
+import type { CategoryWithRemaining } from '../../services';
 import { format } from '../../utils/format';
 
 interface FamilySummaryProps {

frontend/src/components/family/InviteModal.tsx

@@ -3,7 +3,7 @@ import { useTranslation } from 'react-i18next';
 import { Copy, Check, Loader2 } from 'lucide-react';
 import { Modal, Button } from '../ui';
 import { useInviteLink } from '../../hooks';
-import { InviteLinkResponse } from '../../types';
+import type { InviteLinkResponse } from '../../types';
 
 interface InviteModalProps {
   onClose: () => void;

frontend/src/components/profile/FamilySection.tsx

@@ -1,7 +1,7 @@
 import { useState } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Users, Edit3, Save, X, AlertTriangle, Loader2 } from 'lucide-react';
-import { Family } from '../../types';
+import type { Family } from '../../types';
 import { Card, Button, Input } from '../ui';
 import { familyService } from '../../services';
 import { showToast } from '../../utils/toast';

frontend/src/components/profile/MembersSection.tsx

@@ -1,6 +1,5 @@
 import { useTranslation } from 'react-i18next';
-import { Loader2 } from 'lucide-react';
+import type { FamilyMember, User } from '../../types';
-import { FamilyMember, User } from '../../types';
 import { Badge, LoadingSpinner } from '../ui';
 
 interface MembersSectionProps {

frontend/src/components/profile/SettingsSection.tsx

@@ -1,6 +1,6 @@
 import { Settings, Palette, Languages } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
-import { Theme } from '../../types';
+import type { Theme } from '../../types';
 import { Card } from '../ui';
 import { ThemeSelector } from './ThemeSelector';
 import { LanguageSelector } from './LanguageSelector';

frontend/src/components/profile/ThemeSelector.tsx

@@ -1,6 +1,6 @@
 import { Check } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
-import { Theme } from '../../types';
+import type { Theme } from '../../types';
 import { THEMES } from '../../constants';
 
 interface ThemeSelectorProps {

frontend/src/components/profile/UserInfo.tsx

@@ -1,6 +1,6 @@
 import { User as UserIcon, LogOut } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
-import { User } from '../../types';
+import type { User } from '../../types';
 import { Button, Card } from '../ui';
 
 interface UserInfoProps {

frontend/src/components/shopping/ShoppingItemCard.tsx

@@ -1,7 +1,6 @@
 import { useState } from 'react';
-import { useTranslation } from 'react-i18next';
 import { Trash2, Check, Pencil, X } from 'lucide-react';
-import { ShoppingItem } from '../../types';
+import type { ShoppingItem } from '../../types';
 import { Button, Input } from '../ui';
 
 interface ShoppingItemCardProps {
@@ -12,7 +11,6 @@ interface ShoppingItemCardProps {
 }
 
 export function ShoppingItemCard({ item, onToggle, onDelete, onUpdate }: ShoppingItemCardProps) {
-  const { t } = useTranslation();
   const [isEditing, setIsEditing] = useState(false);
   const [editName, setEditName] = useState(item.name);
 

frontend/src/components/shopping/ShoppingItemInput.tsx

@@ -1,4 +1,5 @@
-import { useState, KeyboardEvent } from 'react';
+import { useState } from 'react';
+import type { KeyboardEvent } from 'react';
 import { useTranslation } from 'react-i18next';
 import { Plus } from 'lucide-react';
 import { Button, Input } from '../ui';

frontend/src/components/shopping/ShoppingItemList.tsx

@@ -1,5 +1,5 @@
 import { useTranslation } from 'react-i18next';
-import { ShoppingItem } from '../../types';
+import type { ShoppingItem } from '../../types';
 import { ShoppingItemCard } from './ShoppingItemCard';
 import { shoppingService } from '../../services';
 

frontend/src/components/ui/Badge.tsx

@@ -1,4 +1,4 @@
-import { ReactNode } from 'react';
+import type { ReactNode } from 'react';
 
 interface BadgeProps {
   children: ReactNode;

frontend/src/components/ui/Button.tsx

@@ -1,4 +1,4 @@
-import { ButtonHTMLAttributes, ReactNode } from 'react';
+import type { ButtonHTMLAttributes, ReactNode } from 'react';
 
 interface ButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
   variant?: 'primary' | 'success' | 'danger' | 'secondary' | 'ghost';

frontend/src/components/ui/Card.tsx

@@ -1,4 +1,4 @@
-import { ReactNode } from 'react';
+import type { ReactNode } from 'react';
 
 interface CardProps {
   children: ReactNode;

frontend/src/components/ui/Input.tsx

@@ -1,4 +1,5 @@
-import { InputHTMLAttributes, forwardRef } from 'react';
+import { forwardRef } from 'react';
+import type { InputHTMLAttributes } from 'react';
 
 interface InputProps extends InputHTMLAttributes<HTMLInputElement> {
   label?: string;

frontend/src/components/ui/Modal.tsx

@@ -1,4 +1,5 @@
-import { ReactNode, useEffect } from 'react';
+import { useEffect } from 'react';
+import type { ReactNode } from 'react';
 
 interface ModalProps {
   isOpen: boolean;

frontend/src/constants/index.ts

@@ -1,4 +1,4 @@
-import { Theme } from '../types';
+import type { Theme } from '../types';
 
 export const THEMES: { id: Theme; gradient: string; name: string }[] = [
   { id: 'light', gradient: 'bg-gradient-to-r from-gray-100 to-gray-200', name: 'Light' },

frontend/src/hooks/useCategories.ts

@@ -1,6 +1,7 @@
 import { useState, useEffect, useCallback } from 'react';
-import { categoryService, CategoryWithRemaining } from '../services';
+import { categoryService } from '../services';
-import { CreateCategoryRequest } from '../types';
+import type { CategoryWithRemaining } from '../services';
+import type { CreateCategoryRequest } from '../types';
 import { showToast } from '../utils/toast';
 import { showErrorToast } from '../utils/errorHandler';
 

frontend/src/hooks/useExpenses.ts

@@ -1,6 +1,6 @@
 import { useState, useEffect, useCallback } from 'react';
 import { expenseService } from '../services';
-import { Expense, CreateExpenseRequest } from '../types';
+import type { Expense, CreateExpenseRequest } from '../types';
 import { showToast } from '../utils/toast';
 import { showErrorToast } from '../utils/errorHandler';
 

frontend/src/hooks/useFamilyMembers.ts

@@ -1,6 +1,6 @@
 import { useState, useEffect, useCallback } from 'react';
 import { familyService } from '../services';
-import { FamilyMember } from '../types';
+import type { FamilyMember } from '../types';
 import { showErrorToast } from '../utils/errorHandler';
 
 export function useFamilyMembers(familyId: number | null) {

frontend/src/hooks/useInviteLink.ts

@@ -1,6 +1,6 @@
 import { useState, useEffect, useCallback } from 'react';
 import { inviteService } from '../services';
-import { InviteLinkResponse, CreateInviteLinkRequest } from '../types';
+import type { InviteLinkResponse, CreateInviteLinkRequest } from '../types';
 import { showToast } from '../utils/toast';
 import { showErrorToast } from '../utils/errorHandler';
 

frontend/src/hooks/useShoppingList.ts

@@ -1,6 +1,6 @@
 import { useState, useEffect, useCallback } from 'react';
 import { shoppingService } from '../services';
-import { ShoppingItem, CreateShoppingItemRequest } from '../types';
+import type { ShoppingItem, CreateShoppingItemRequest } from '../types';
 import { showToast } from '../utils/toast';
 import { showErrorToast } from '../utils/errorHandler';
 

frontend/src/pages/Profile.tsx

@@ -5,9 +5,8 @@ import { User as UserIcon } from 'lucide-react';
 import { familyApi, authApi } from '../api/client';
 import { useStore } from '../store/useStore';
 import { useFamilyMembers, useConfirm } from '../hooks';
-import { Theme } from '../types';
+import type { Theme } from '../types';
 import { ProfileHeader } from '../components/profile/ProfileHeader';
-import { UserInfo } from '../components/profile/UserInfo';
 import { FamilySection } from '../components/profile/FamilySection';
 import { MembersSection } from '../components/profile/MembersSection';
 import { SettingsSection } from '../components/profile/SettingsSection';
@@ -19,7 +18,7 @@ export default function Profile() {
   const { t, i18n } = useTranslation();
   const navigate = useNavigate();
   const { user, selectedFamily, setSelectedFamily, setUser, preferences, setPreferences } = useStore();
-  const { members, loading: membersLoading, loadMembers } = useFamilyMembers(user?.family_id || null);
+  const { members, loading: membersLoading } = useFamilyMembers(user?.family_id || null);
   const { confirmState, confirm, cancel } = useConfirm();
 
   const [leavingFamily, setLeavingFamily] = useState(false);
@@ -61,17 +60,6 @@ export default function Profile() {
     }
   };
 
-  const handleLogout = async () => {
-    try {
-      await authApi.logout();
-      setUser(null);
-      setSelectedFamily(null);
-      navigate('/login');
-    } catch (error) {
-      showErrorToast(error);
-    }
-  };
-
   const handleThemeChange = (theme: Theme) => {
     setPreferences({ ...preferences, theme });
     showToast.success(t('profile.themeChanged'));

frontend/src/services/categoryService.ts

@@ -1,5 +1,5 @@
 import { categoryApi, expenseApi } from '../api/client';
-import { Category, CreateCategoryRequest, RemainingLimit } from '../types';
+import type { Category, CreateCategoryRequest } from '../types';
 import { handleApiError } from '../utils/errorHandler';
 
 export interface CategoryWithRemaining extends Category {

frontend/src/services/expenseService.ts

@@ -1,5 +1,5 @@
 import { expenseApi } from '../api/client';
-import { Expense, CreateExpenseRequest } from '../types';
+import type { Expense, CreateExpenseRequest } from '../types';
 import { handleApiError } from '../utils/errorHandler';
 
 export const expenseService = {

frontend/src/services/familyService.ts

@@ -1,5 +1,5 @@
 import { familyApi } from '../api/client';
-import { Family, CreateFamilyRequest, CreateMyFamilyRequest, CreateMyFamilyResponse, VerifyFamilyPasswordRequest, FamilyMember } from '../types';
+import type { Family, CreateFamilyRequest, CreateMyFamilyRequest, CreateMyFamilyResponse, VerifyFamilyPasswordRequest, FamilyMember } from '../types';
 import { handleApiError } from '../utils/errorHandler';
 
 export const familyService = {

frontend/src/services/inviteService.ts

@@ -1,5 +1,5 @@
 import { inviteLinkApi } from '../api/client';
-import { CreateInviteLinkRequest, InviteLinkResponse, ValidateInviteResponse, JoinFamilyResponse } from '../types';
+import type { CreateInviteLinkRequest, InviteLinkResponse, ValidateInviteResponse, JoinFamilyResponse } from '../types';
 import { handleApiError } from '../utils/errorHandler';
 
 export const inviteService = {

frontend/src/services/shoppingService.ts

@@ -1,5 +1,5 @@
 import { shoppingItemApi } from '../api/client';
-import { ShoppingItem, CreateShoppingItemRequest, UpdateShoppingItemRequest, MarkAsPurchasedRequest } from '../types';
+import type { ShoppingItem, CreateShoppingItemRequest, UpdateShoppingItemRequest, MarkAsPurchasedRequest } from '../types';
 import { handleApiError } from '../utils/errorHandler';
 
 export const shoppingService = {

frontend/src/store/useStore.ts

@@ -124,7 +124,7 @@ export const useStore = create<AppState>((set, get) => ({
   },
 
   clearCache: () => {
-    set((state) => ({
+    set(() => ({
       cache: {
         categories: new Map(),
         members: new Map(),

frontend/src/utils/errorHandler.ts

@@ -1,5 +1,5 @@
 import { AxiosError } from 'axios';
-import { ApiError, AppError } from '../types/errors';
+import { AppError } from '../types/errors';
 import { showToast } from './toast';
 
 export function handleApiError(error: unknown): never {