test: update tests to use usePreference hook and improve snapshot consistency

- Refactored tests in MainTextBlock and ThinkingBlock to utilize the usePreference hook for managing user settings.
- Updated snapshots in DraggableVirtualList test to reflect changes in class names.
- Enhanced export tests to ensure proper handling of markdown formatting and citation footnotes.
- Mocked additional dependencies globally for improved test reliability.

src/renderer/src/components/DraggableList/__tests__/__snapshots__/DraggableVirtualList.test.tsx.snap

@@ -20,8 +20,7 @@ exports[`DraggableVirtualList > snapshot > should match snapshot with custom sty
           </div>
         </div>
         <div
-          class="virtual-scroller"
+          class="ScrollBarContainer-eGlIoO jgKpou virtual-scroller"
-          data-testid="scrollbar"
           style="height: 100%; width: 100%; overflow-y: auto; position: relative;"
         >
           <div

src/renderer/src/data/README.md

@@ -0,0 +1,305 @@
+# Data Layer - Renderer Process
+
+This directory contains the unified data access layer for Cherry Studio's renderer process, providing type-safe interfaces for data operations, preference management, and caching.
+
+## Overview
+
+The `src/renderer/src/data` directory implements the new data architecture as part of the ongoing database refactoring project. It provides three core services that handle all data operations in the renderer process:
+
+- **DataApiService**: RESTful-style API for communication with the main process
+- **PreferenceService**: Unified preference/configuration management with real-time sync
+- **CacheService**: Three-tier caching system for optimal performance
+
+## Architecture
+
+```
+┌─────────────────┐
+│ React Components│
+└─────────┬───────┘
+          │
+┌─────────▼───────┐
+│   React Hooks   │  ← useDataApi, usePreference, useCache
+└─────────┬───────┘
+          │
+┌─────────▼───────┐
+│    Services     │  ← DataApiService, PreferenceService, CacheService
+└─────────┬───────┘
+          │
+┌─────────▼───────┐
+│   IPC Layer     │  ← Main Process Communication
+└─────────────────┘
+```
+
+## Quick Start
+
+### Data API Operations
+
+```typescript
+import { useQuery, useMutation } from '@data/hooks/useDataApi'
+
+// Fetch data with auto-retry and caching
+const { data, loading, error } = useQuery('/topics')
+
+// Create/update data with optimistic updates
+const { trigger: createTopic } = useMutation('/topics', 'POST')
+await createTopic({ title: 'New Topic', content: 'Hello World' })
+```
+
+### Preference Management
+
+```typescript
+import { usePreference } from '@data/hooks/usePreference'
+
+// Manage user preferences with real-time sync
+const [theme, setTheme] = usePreference('app.theme.mode')
+const [fontSize, setFontSize] = usePreference('chat.message.font_size')
+
+// Optimistic updates (default)
+await setTheme('dark') // UI updates immediately, syncs to database
+```
+
+### Cache Management
+
+```typescript
+import { useCache, useSharedCache, usePersistCache } from '@data/hooks/useCache'
+
+// Component-level cache (lost on app restart)
+const [count, setCount] = useCache('ui.counter')
+
+// Cross-window cache (shared between all windows)
+const [windowState, setWindowState] = useSharedCache('window.layout')
+
+// Persistent cache (survives app restarts)
+const [recentFiles, setRecentFiles] = usePersistCache('app.recent_files')
+```
+
+## Core Services
+
+### DataApiService
+
+**Purpose**: Type-safe communication with the main process using RESTful-style APIs.
+
+**Key Features**:
+- Type-safe request/response handling
+- Automatic retry with exponential backoff
+- Batch operations and transactions
+- Real-time subscriptions
+- Request cancellation and timeout handling
+
+**Basic Usage**:
+```typescript
+import { dataApiService } from '@data/DataApiService'
+
+// Simple GET request
+const topics = await dataApiService.get('/topics')
+
+// POST with body
+const newTopic = await dataApiService.post('/topics', {
+  body: { title: 'Hello', content: 'World' }
+})
+
+// Batch operations
+const responses = await dataApiService.batch([
+  { method: 'GET', path: '/topics' },
+  { method: 'GET', path: '/messages' }
+])
+```
+
+### PreferenceService
+
+**Purpose**: Centralized preference/configuration management with cross-window synchronization.
+
+**Key Features**:
+- Optimistic and pessimistic update strategies
+- Real-time cross-window synchronization
+- Local caching for performance
+- Race condition handling
+- Batch operations for multiple preferences
+
+**Basic Usage**:
+```typescript
+import { preferenceService } from '@data/PreferenceService'
+
+// Get single preference
+const theme = await preferenceService.get('app.theme.mode')
+
+// Set with optimistic updates (default)
+await preferenceService.set('app.theme.mode', 'dark')
+
+// Set with pessimistic updates
+await preferenceService.set('api.key', 'secret', { optimistic: false })
+
+// Batch operations
+await preferenceService.setMultiple({
+  'app.theme.mode': 'dark',
+  'chat.message.font_size': 14
+})
+```
+
+### CacheService
+
+**Purpose**: Three-tier caching system for different data persistence needs.
+
+**Cache Tiers**:
+1. **Memory Cache**: Component-level, lost on app restart
+2. **Shared Cache**: Cross-window, lost on app restart
+3. **Persist Cache**: Cross-window + localStorage, survives restarts
+
+**Key Features**:
+- TTL (Time To Live) support
+- Hook reference tracking (prevents deletion of active data)
+- Cross-window synchronization
+- Type-safe cache schemas
+- Automatic default value handling
+
+**Basic Usage**:
+```typescript
+import { cacheService } from '@data/CacheService'
+
+// Memory cache (component-level)
+cacheService.set('temp.calculation', result, 30000) // 30s TTL
+const result = cacheService.get('temp.calculation')
+
+// Shared cache (cross-window)
+cacheService.setShared('window.layout', layoutConfig)
+const layout = cacheService.getShared('window.layout')
+
+// Persist cache (survives restarts)
+cacheService.setPersist('app.recent_files', recentFiles)
+const files = cacheService.getPersist('app.recent_files')
+```
+
+## React Hooks
+
+### useDataApi
+
+Type-safe data fetching with SWR integration.
+
+```typescript
+import { useQuery, useMutation } from '@data/hooks/useDataApi'
+
+// GET requests with auto-caching
+const { data, loading, error, mutate } = useQuery('/topics', {
+  query: { page: 1, limit: 20 }
+})
+
+// Mutations with optimistic updates
+const { trigger: updateTopic, isMutating } = useMutation('/topics/123', 'PUT')
+await updateTopic({ title: 'Updated Title' })
+```
+
+### usePreference
+
+Reactive preference management with automatic synchronization.
+
+```typescript
+import { usePreference } from '@data/hooks/usePreference'
+
+// Basic usage with optimistic updates
+const [theme, setTheme] = usePreference('app.theme.mode')
+
+// Pessimistic updates for critical settings
+const [apiKey, setApiKey] = usePreference('api.key', { optimistic: false })
+
+// Handle updates
+const handleThemeChange = async (newTheme) => {
+  try {
+    await setTheme(newTheme) // Auto-rollback on failure
+  } catch (error) {
+    console.error('Theme update failed:', error)
+  }
+}
+```
+
+### useCache Hooks
+
+Component-friendly cache management with automatic lifecycle handling.
+
+```typescript
+import { useCache, useSharedCache, usePersistCache } from '@data/hooks/useCache'
+
+// Memory cache (useState-like, but shared between components)
+const [counter, setCounter] = useCache('ui.counter', 0)
+
+// Shared cache (cross-window)
+const [layout, setLayout] = useSharedCache('window.layout')
+
+// Persistent cache (survives restarts)
+const [recentFiles, setRecentFiles] = usePersistCache('app.recent_files')
+```
+
+## Best Practices
+
+### When to Use Which Service
+
+- **DataApiService**: For database operations, API calls, and any data that needs to persist
+- **PreferenceService**: For user settings, app configuration, and preferences
+- **CacheService**: For temporary data, computed results, and performance optimization
+
+### Performance Guidelines
+
+1. **Prefer React Hooks**: Use `useQuery`, `usePreference`, `useCache` for component integration
+2. **Batch Operations**: Use `setMultiple()` for updating multiple preferences
+3. **Cache Strategically**: Use appropriate cache tiers based on data lifetime needs
+4. **Optimize Re-renders**: SWR and useSyncExternalStore minimize unnecessary re-renders
+
+### Common Patterns
+
+```typescript
+// Loading states with error handling
+const { data, loading, error } = useQuery('/topics')
+if (loading) return <Loading />
+if (error) return <Error error={error} />
+
+// Form handling with preferences
+const [fontSize, setFontSize] = usePreference('chat.message.font_size')
+const handleChange = (e) => setFontSize(Number(e.target.value))
+
+// Temporary state with caching
+const [searchQuery, setSearchQuery] = useCache('search.current_query', '')
+const [searchResults, setSearchResults] = useCache('search.results', [])
+```
+
+## Type Safety
+
+All services provide full TypeScript support with auto-completion and type checking:
+
+- **API Types**: Defined in `@shared/data/api/`
+- **Preference Types**: Defined in `@shared/data/preference/`
+- **Cache Types**: Defined in `@shared/data/cache/`
+
+Type definitions are automatically inferred, providing:
+- Request/response type safety
+- Preference key validation
+- Cache schema enforcement
+- Auto-completion in IDEs
+
+## Migration from Legacy Systems
+
+This new data layer replaces multiple legacy systems:
+- Redux-persist slices → PreferenceService
+- localStorage direct access → CacheService
+- Direct IPC calls → DataApiService
+- Dexie database operations → DataApiService
+
+For migration guidelines, see the project's `.claude/` directory documentation.
+
+## File Structure
+
+```
+src/renderer/src/data/
+├── DataApiService.ts       # User Data API querying service
+├── PreferenceService.ts    # Preferences management
+├── CacheService.ts         # Three-tier caching system
+└── hooks/
+    ├── useDataApi.ts       # React hooks for user data operations
+    ├── usePreference.ts    # React hooks for preferences
+    └── useCache.ts         # React hooks for caching
+```
+
+## Related Documentation
+
+- **API Schemas**: `packages/shared/data/` - Type definitions and API contracts
+- **Architecture Design**: `.claude/data-architecture.md` - Detailed system design
+- **Migration Guide**: `.claude/migration-planning.md` - Legacy system migration
+- **Project Overview**: `CLAUDE.local.md` - Complete refactoring context

src/renderer/src/pages/home/Messages/Blocks/__tests__/MainTextBlock.test.tsx

@@ -12,12 +12,17 @@ import MainTextBlock from '../MainTextBlock'
 // Mock dependencies
 const mockUseSettings = vi.fn()
 const mockUseSelector = vi.fn()
+let mockUsePreference: any
 
 // Mock hooks
 vi.mock('@renderer/hooks/useSettings', () => ({
   useSettings: () => mockUseSettings()
 }))
 
+vi.mock('@data/hooks/usePreference', () => ({
+  usePreference: vi.fn()
+}))
+
 vi.mock('react-redux', async () => {
   const actual = await import('react-redux')
   return {
@@ -107,12 +112,15 @@ describe('MainTextBlock', () => {
     // Get the mocked functions
     const { getModelUniqId } = await import('@renderer/services/ModelService')
     const { withCitationTags, determineCitationSource } = await import('@renderer/utils/citation')
+    const { usePreference } = await import('@data/hooks/usePreference')
     mockGetModelUniqId = getModelUniqId as any
     mockWithCitationTags = withCitationTags as any
     mockDetermineCitationSource = determineCitationSource as any
+    mockUsePreference = usePreference as any
 
     // Default mock implementations
     mockUseSettings.mockReturnValue({ renderInputMessageAsMarkdown: false })
+    mockUsePreference.mockReturnValue([false, vi.fn()]) // usePreference returns [value, setter]
     mockUseSelector.mockReturnValue([]) // Empty citations by default
     mockGetModelUniqId.mockImplementation((model: Model) => `${model.id}-${model.name}`)
   })
@@ -167,7 +175,7 @@ describe('MainTextBlock', () => {
     })
 
     it('should render in plain text mode for user messages when setting disabled', () => {
-      mockUseSettings.mockReturnValue({ renderInputMessageAsMarkdown: false })
+      mockUsePreference.mockReturnValue([false, vi.fn()])
       const block = createMainTextBlock({ content: 'User message\nWith line breaks' })
       renderMainTextBlock({ block, role: 'user' })
 
@@ -182,7 +190,7 @@ describe('MainTextBlock', () => {
     })
 
     it('should render user messages as markdown when setting enabled', () => {
-      mockUseSettings.mockReturnValue({ renderInputMessageAsMarkdown: true })
+      mockUsePreference.mockReturnValue([true, vi.fn()])
       const block = createMainTextBlock({ content: 'User **bold** content' })
       renderMainTextBlock({ block, role: 'user' })
 
@@ -191,7 +199,7 @@ describe('MainTextBlock', () => {
     })
 
     it('should preserve complex formatting in plain text mode', () => {
-      mockUseSettings.mockReturnValue({ renderInputMessageAsMarkdown: false })
+      mockUsePreference.mockReturnValue([false, vi.fn()])
       const complexContent = `Line 1
   Indented line
 **Bold not parsed**
@@ -417,13 +425,13 @@ describe('MainTextBlock', () => {
       const block = createMainTextBlock({ content: 'Settings test content' })
 
       // Test with markdown enabled
-      mockUseSettings.mockReturnValue({ renderInputMessageAsMarkdown: true })
+      mockUsePreference.mockReturnValue([true, vi.fn()])
       const { unmount } = renderMainTextBlock({ block, role: 'user' })
       expect(getRenderedMarkdown()).toBeInTheDocument()
       unmount()
 
       // Test with markdown disabled
-      mockUseSettings.mockReturnValue({ renderInputMessageAsMarkdown: false })
+      mockUsePreference.mockReturnValue([false, vi.fn()])
       renderMainTextBlock({ block, role: 'user' })
       expect(getRenderedPlainText()).toBeInTheDocument()
       expect(getRenderedMarkdown()).not.toBeInTheDocument()

src/renderer/src/pages/home/Messages/Blocks/__tests__/ThinkingBlock.test.tsx

@@ -8,12 +8,17 @@ import ThinkingBlock from '../ThinkingBlock'
 // Mock dependencies
 const mockUseSettings = vi.fn()
 const mockUseTranslation = vi.fn()
+let mockUsePreference: any
 
 // Mock hooks
 vi.mock('@renderer/hooks/useSettings', () => ({
   useSettings: () => mockUseSettings()
 }))
 
+vi.mock('@data/hooks/usePreference', () => ({
+  usePreference: vi.fn()
+}))
+
 vi.mock('react-i18next', () => ({
   useTranslation: () => mockUseTranslation()
 }))
@@ -120,6 +125,10 @@ describe('ThinkingBlock', () => {
   beforeEach(async () => {
     vi.useFakeTimers()
 
+    // Get the mocked functions
+    const { usePreference } = await import('@data/hooks/usePreference')
+    mockUsePreference = usePreference as any
+
     // Default mock implementations
     mockUseSettings.mockReturnValue({
       messageFont: 'sans-serif',
@@ -127,6 +136,23 @@ describe('ThinkingBlock', () => {
       thoughtAutoCollapse: false
     })
 
+    // Mock usePreference calls - component uses these hooks:
+    // - usePreference('chat.message.font')
+    // - usePreference('chat.message.font_size')
+    // - usePreference('chat.message.thought.auto_collapse')
+    mockUsePreference.mockImplementation((key: string) => {
+      switch (key) {
+        case 'chat.message.font':
+          return ['sans-serif', vi.fn()]
+        case 'chat.message.font_size':
+          return [14, vi.fn()]
+        case 'chat.message.thought.auto_collapse':
+          return [false, vi.fn()]
+        default:
+          return [undefined, vi.fn()]
+      }
+    })
+
     mockUseTranslation.mockReturnValue({
       t: (key: string, params?: any) => {
         if (key === 'chat.thinking' && params?.seconds) {
@@ -275,10 +301,17 @@ describe('ThinkingBlock', () => {
       unmount()
 
       // Test collapsed by default (auto-collapse enabled)
-      mockUseSettings.mockReturnValue({
+      mockUsePreference.mockImplementation((key: string) => {
-        messageFont: 'sans-serif',
+        switch (key) {
-        fontSize: 14,
+          case 'chat.message.font':
-        thoughtAutoCollapse: true
+            return ['sans-serif', vi.fn()]
+          case 'chat.message.font_size':
+            return [14, vi.fn()]
+          case 'chat.message.thought.auto_collapse':
+            return [true, vi.fn()] // Enable auto-collapse
+          default:
+            return [undefined, vi.fn()]
+        }
       })
 
       renderThinkingBlock(block)
@@ -288,10 +321,17 @@ describe('ThinkingBlock', () => {
     })
 
     it('should auto-collapse when thinking completes if setting enabled', () => {
-      mockUseSettings.mockReturnValue({
+      mockUsePreference.mockImplementation((key: string) => {
-        messageFont: 'sans-serif',
+        switch (key) {
-        fontSize: 14,
+          case 'chat.message.font':
-        thoughtAutoCollapse: true
+            return ['sans-serif', vi.fn()]
+          case 'chat.message.font_size':
+            return [14, vi.fn()]
+          case 'chat.message.thought.auto_collapse':
+            return [true, vi.fn()] // Enable auto-collapse
+          default:
+            return [undefined, vi.fn()]
+        }
       })
 
       const streamingBlock = createThinkingBlock({ status: MessageBlockStatus.STREAMING })
@@ -325,9 +365,17 @@ describe('ThinkingBlock', () => {
       ]
 
       testCases.forEach(({ settings, expectedFont, expectedSize }) => {
-        mockUseSettings.mockReturnValue({
+        mockUsePreference.mockImplementation((key: string) => {
-          ...settings,
+          switch (key) {
-          thoughtAutoCollapse: false
+            case 'chat.message.font':
+              return [settings.messageFont, vi.fn()]
+            case 'chat.message.font_size':
+              return [settings.fontSize, vi.fn()]
+            case 'chat.message.thought.auto_collapse':
+              return [false, vi.fn()] // Keep expanded to test styling
+            default:
+              return [undefined, vi.fn()]
+          }
         })
 
         const block = createThinkingBlock()

src/renderer/src/services/__tests__/ApiService.test.ts

@@ -99,7 +99,8 @@ vi.mock('@renderer/utils', () => ({
 }))
 
 vi.mock('@shared/config/prompts', () => ({
-  WEB_SEARCH_PROMPT_FOR_OPENROUTER: 'mock-prompt'
+  WEB_SEARCH_PROMPT_FOR_OPENROUTER: 'mock-prompt',
+  TRANSLATE_PROMPT: 'You are a translation expert. Your only task is to translate text enclosed with <translate_input> from input language to {{target_language}}, provide the translation result directly without any explanation, without `TRANSLATE` and keep original format.'
 }))
 
 vi.mock('@renderer/config/systemModels', () => ({

src/renderer/src/utils/__tests__/export.test.ts

@@ -35,6 +35,11 @@ vi.mock('@renderer/i18n', () => ({
   }
 }))
 
+// Mock getProviderLabel
+vi.mock('@renderer/i18n/label', () => ({
+  getProviderLabel: vi.fn((providerId: string) => providerId || 'Unknown Provider')
+}))
+
 // Mock the find utility functions - crucial for the test
 vi.mock('@renderer/utils/messageUtils/find', () => ({
   // Provide type safety for mocked message
@@ -66,11 +71,13 @@ vi.mock('@renderer/hooks/useTopic', () => ({
   }
 }))
 
+// PreferenceService is now mocked globally in tests/renderer.setup.ts
+
 vi.mock('@renderer/utils/markdown', async (importOriginal) => {
   const actual = await importOriginal()
   return {
     ...(actual as any),
-    markdownToPlainText: vi.fn((str) => str) // Simple pass-through for testing export logic
+    markdownToPlainText: vi.fn((str: string) => str) // Simple pass-through for testing export logic
   }
 })
 
@@ -311,7 +318,7 @@ describe('export', () => {
       const markdown = await messageToMarkdown(msgWithCitation)
       expect(markdown).toContain('## 🤖 Assistant')
       expect(markdown).toContain('Main content')
-      expect(markdown).toContain('[1] [https://example1.com](Example Citation 1)')
+      expect(markdown).toContain('[^1]: [https://example1.com](Example Citation 1)')
     })
   })
 
@@ -352,34 +359,34 @@ describe('export', () => {
       expect(sections.length).toBeGreaterThanOrEqual(2)
     })
 
-    it('should handle <think> tag and replace newlines with <br> in reasoning', () => {
+    it('should handle <think> tag and replace newlines with <br> in reasoning', async () => {
       const msg = mockedMessages.find((m) => m.id === 'a3')
       expect(msg).toBeDefined()
-      const markdown = messageToMarkdownWithReasoning(msg!)
+      const markdown = await messageToMarkdownWithReasoning(msg!)
       expect(markdown).toContain('Answer B')
       expect(markdown).toContain('<details')
       expect(markdown).toContain('Line1<br>Line2')
       expect(markdown).not.toContain('<think>')
     })
 
-    it('should not include details section if no thinking block exists', () => {
+    it('should not include details section if no thinking block exists', async () => {
       const msg = mockedMessages.find((m) => m.id === 'a4')
       expect(msg).toBeDefined()
-      const markdown = messageToMarkdownWithReasoning(msg!)
+      const markdown = await messageToMarkdownWithReasoning(msg!)
       expect(markdown).toContain('## 🤖 Assistant')
       expect(markdown).toContain('Simple Answer')
       expect(markdown).not.toContain('<details')
     })
 
-    it('should include both reasoning and citation content', () => {
+    it('should include both reasoning and citation content', async () => {
       const msg = mockedMessages.find((m) => m.id === 'a5')
       expect(msg).toBeDefined()
-      const markdown = messageToMarkdownWithReasoning(msg!)
+      const markdown = await messageToMarkdownWithReasoning(msg!)
       expect(markdown).toContain('## 🤖 Assistant')
       expect(markdown).toContain('Answer with citation')
       expect(markdown).toContain('<details')
       expect(markdown).toContain('Some thinking')
-      expect(markdown).toContain('[1] [https://example1.com](Example Citation 1)')
+      expect(markdown).toContain('[^1]: [https://example1.com](Example Citation 1)')
     })
 
     it('should format citations as footnotes when standardize citations is enabled', () => {
@@ -415,7 +422,7 @@ describe('export', () => {
     })
 
     it('should handle an empty array of messages', async () => {
-      expect(messagesToMarkdown([])).toBe('')
+      expect(await messagesToMarkdown([])).toBe('')
     })
 
     it('should handle a single message without separator', async () => {
@@ -458,7 +465,7 @@ describe('export', () => {
       const { TopicManager } = await import('@renderer/hooks/useTopic')
       ;(TopicManager.getTopicMessages as any).mockResolvedValue([userMsg, assistantMsg])
       // Specific mock for this test to check formatting
-      ;(markdownToPlainText as any).mockImplementation(async (str: string) => str.replace(/[#*]/g, ''))
+      ;(markdownToPlainText as any).mockImplementation((str: string) => str.replace(/[#*]/g, ''))
 
       const plainText = await topicToPlainText(testTopic)
 
@@ -475,7 +482,7 @@ describe('export', () => {
       const testMessage = createMessage({ role: 'user', id: 'single_msg_plain' }, [
         { type: MessageBlockType.MAIN_TEXT, content: '### Single Message Content' }
       ])
-      ;(markdownToPlainText as any).mockImplementation(async (str: string) => str.replace(/[#*_]/g, ''))
+      ;(markdownToPlainText as any).mockImplementation((str: string) => str.replace(/[#*_]/g, ''))
 
       const result = await messageToPlainText(testMessage)
       expect(result).toBe('Single Message Content')
@@ -1002,7 +1009,7 @@ describe('Citation formatting in Markdown export', () => {
     expect(processedContent).not.toContain('<sup')
   })
 
-  test('should properly test formatCitationsAsFootnotes through messageToMarkdown', () => {
+  test('should properly test formatCitationsAsFootnotes through messageToMarkdown', async () => {
     const msgWithCitations = createMessage({ role: 'assistant', id: 'test_footnotes' }, [
       {
         type: MessageBlockType.MAIN_TEXT,
@@ -1012,13 +1019,13 @@ describe('Citation formatting in Markdown export', () => {
     ])
 
     // This tests the complete flow including formatCitationsAsFootnotes
-    const markdown = messageToMarkdown(msgWithCitations)
+    const markdown = await messageToMarkdown(msgWithCitations)
 
     // Should contain the title and content
     expect(markdown).toContain('## 🤖 Assistant')
     expect(markdown).toContain('Content with citations')
 
     // Should include citation content (mocked by getCitationContent)
-    expect(markdown).toContain('[1] [https://example1.com](Example Citation 1)')
+    expect(markdown).toContain('[^1]: [https://example1.com](Example Citation 1)')
   })
 })

src/renderer/src/utils/__tests__/match.test.ts

@@ -1,8 +1,20 @@
 import type { Model, Provider, SystemProvider } from '@renderer/types'
-import { describe, expect, it } from 'vitest'
+import { describe, expect, it, vi } from 'vitest'
 
 import { includeKeywords, matchKeywordsInModel, matchKeywordsInProvider, matchKeywordsInString } from '../match'
 
+// Mock i18n to return English provider labels
+vi.mock('@renderer/i18n/label', () => ({
+  getProviderLabel: vi.fn((id: string) => {
+    const labelMap: Record<string, string> = {
+      'dashscope': 'Alibaba Cloud',
+      'openai': 'OpenAI',
+      'anthropic': 'Anthropic'
+    }
+    return labelMap[id] || id
+  })
+}))
+
 describe('match', () => {
   const provider = {
     id: '12345',

src/renderer/src/utils/__tests__/naming.test.ts

@@ -1,5 +1,17 @@
 import { Provider, SystemProvider } from '@renderer/types'
-import { describe, expect, it } from 'vitest'
+import { describe, expect, it, vi } from 'vitest'
+
+// Mock i18n to return English provider labels
+vi.mock('@renderer/i18n/label', () => ({
+  getProviderLabel: vi.fn((id: string) => {
+    const labelMap: Record<string, string> = {
+      'dashscope': 'Alibaba Cloud',
+      'openai': 'OpenAI',
+      'anthropic': 'Anthropic'
+    }
+    return labelMap[id] || id
+  })
+}))
 
 import {
   firstLetter,

src/renderer/src/utils/export.ts

@@ -270,7 +270,7 @@ const createBaseMarkdown = async (
   normalizeCitations: boolean = true
 ): Promise<{ titleSection: string; reasoningSection: string; contentSection: string; citation: string }> => {
   const forceDollarMathInMarkdown = await preferenceService.get('data.export.markdown.force_dollar_math')
-  const roleText = getRoleText(message.role, message.model?.name, message.model?.provider)
+  const roleText = await getRoleText(message.role, message.model?.name, message.model?.provider)
   const titleSection = `## ${roleText}`
   let reasoningSection = ''
 

tests/__mocks__/README.md

@@ -0,0 +1,609 @@
+# Test Mocks
+
+这个目录包含了项目中使用的统一测试模拟（mocks）。这些模拟按照进程类型组织，避免重名冲突，并在相应的测试设置文件中全局配置。
+
+## 🎯 统一模拟概述
+
+### 已实现的统一模拟
+
+#### Renderer Process Mocks
+- ✅ **PreferenceService** - 渲染进程偏好设置服务模拟
+- ✅ **DataApiService** - 渲染进程数据API服务模拟
+- ✅ **CacheService** - 渲染进程三层缓存服务模拟
+- ✅ **useDataApi hooks** - 数据API钩子模拟 (useQuery, useMutation, usePaginatedQuery, etc.)
+- ✅ **usePreference hooks** - 偏好设置钩子模拟 (usePreference, useMultiplePreferences)
+- ✅ **useCache hooks** - 缓存钩子模拟 (useCache, useSharedCache, usePersistCache)
+
+#### Main Process Mocks
+- ✅ **PreferenceService** - 主进程偏好设置服务模拟
+- ✅ **DataApiService** - 主进程数据API服务模拟
+- ✅ **CacheService** - 主进程缓存服务模拟
+
+### 🌟 核心优势
+
+- **进程分离**: 按照renderer/main分开组织，避免重名冲突
+- **自动应用**: 无需在每个测试文件中单独模拟
+- **完整API覆盖**: 实现了所有服务和钩子的完整API
+- **类型安全**: 完全支持 TypeScript，保持与真实服务的类型兼容性
+- **现实行为**: 模拟提供现实的默认值和行为模式
+- **高度可定制**: 支持为特定测试定制行为
+- **测试工具**: 内置丰富的测试工具函数
+
+### 📁 文件结构
+
+```
+tests/__mocks__/
+├── README.md                    # 本文档
+├── renderer/                    # 渲染进程模拟
+│   ├── PreferenceService.ts     # 渲染进程偏好设置服务模拟
+│   ├── DataApiService.ts        # 渲染进程数据API服务模拟
+│   ├── CacheService.ts          # 渲染进程缓存服务模拟
+│   ├── useDataApi.ts            # 数据API钩子模拟
+│   ├── usePreference.ts         # 偏好设置钩子模拟
+│   └── useCache.ts              # 缓存钩子模拟
+├── main/                        # 主进程模拟
+│   ├── PreferenceService.ts     # 主进程偏好设置服务模拟
+│   ├── DataApiService.ts        # 主进程数据API服务模拟
+│   └── CacheService.ts          # 主进程缓存服务模拟
+├── RendererLoggerService.ts     # 渲染进程日志服务模拟
+└── MainLoggerService.ts         # 主进程日志服务模拟
+```
+
+### 🔧 测试设置
+
+#### Renderer Process Tests
+在 `tests/renderer.setup.ts` 中配置了所有渲染进程模拟：
+
+```typescript
+// 自动加载 renderer/ 目录下的模拟
+vi.mock('@data/PreferenceService', async () => {
+  const { MockPreferenceService } = await import('./__mocks__/renderer/PreferenceService')
+  return MockPreferenceService
+})
+// ... 其他渲染进程模拟
+```
+
+#### Main Process Tests
+在 `tests/main.setup.ts` 中配置了所有主进程模拟：
+
+```typescript
+// 自动加载 main/ 目录下的模拟
+vi.mock('@main/data/PreferenceService', async () => {
+  const { MockMainPreferenceServiceExport } = await import('./__mocks__/main/PreferenceService')
+  return MockMainPreferenceServiceExport
+})
+// ... 其他主进程模拟
+```
+
+## PreferenceService Mock
+
+### 简介
+
+`PreferenceService.ts` 提供了 PreferenceService 的统一模拟实现，用于所有渲染进程测试。这个模拟：
+
+- ✅ **自动应用**：在 `renderer.setup.ts` 中全局配置，无需在每个测试文件中单独模拟
+- ✅ **完整API**：实现了 PreferenceService 的所有方法（get, getMultiple, set, etc.）
+- ✅ **合理默认值**：提供了常用偏好设置的默认值
+- ✅ **可定制**：支持为特定测试定制默认值
+- ✅ **类型安全**：完全支持 TypeScript 类型检查
+
+### 默认值
+
+模拟提供了以下默认偏好设置：
+
+```typescript
+// 导出偏好设置
+'data.export.markdown.force_dollar_math': false
+'data.export.markdown.exclude_citations': false
+'data.export.markdown.standardize_citations': true
+'data.export.markdown.show_model_name': false
+'data.export.markdown.show_model_provider': false
+
+// UI偏好设置
+'ui.language': 'en'
+'ui.theme': 'light'
+'ui.font_size': 14
+
+// AI偏好设置
+'ai.default_model': 'gpt-4'
+'ai.temperature': 0.7
+'ai.max_tokens': 2000
+
+// 功能开关
+'feature.web_search': true
+'feature.reasoning': false
+'feature.tool_calling': true
+```
+
+### 基本使用
+
+由于模拟已经全局配置，大多数测试可以直接使用 PreferenceService，无需额外设置：
+
+```typescript
+import { preferenceService } from '@data/PreferenceService'
+
+describe('MyComponent', () => {
+  it('should use preference values', async () => {
+    // PreferenceService 已经被自动模拟
+    const value = await preferenceService.get('ui.theme')
+    expect(value).toBe('light') // 使用默认值
+  })
+})
+```
+
+### 高级使用
+
+#### 1. 修改单个测试的偏好值
+
+```typescript
+import { preferenceService } from '@data/PreferenceService'
+import { vi } from 'vitest'
+
+describe('Custom preferences', () => {
+  it('should work with custom preference values', async () => {
+    // 为这个测试修改特定值
+    ;(preferenceService.get as any).mockImplementation((key: string) => {
+      if (key === 'ui.theme') return Promise.resolve('dark')
+      // 其他键使用默认模拟行为
+      return vi.fn().mockResolvedValue(null)()
+    })
+
+    const theme = await preferenceService.get('ui.theme')
+    expect(theme).toBe('dark')
+  })
+})
+```
+
+#### 2. 重置模拟状态
+
+```typescript
+import { preferenceService } from '@data/PreferenceService'
+
+describe('Mock state management', () => {
+  beforeEach(() => {
+    // 重置模拟到初始状态
+    if ('_resetMockState' in preferenceService) {
+      ;(preferenceService as any)._resetMockState()
+    }
+  })
+})
+```
+
+#### 3. 检查模拟内部状态
+
+```typescript
+import { preferenceService } from '@data/PreferenceService'
+
+describe('Mock inspection', () => {
+  it('should allow inspecting mock state', () => {
+    // 查看当前模拟状态
+    if ('_getMockState' in preferenceService) {
+      const state = (preferenceService as any)._getMockState()
+      console.log('Current mock state:', state)
+    }
+  })
+})
+```
+
+#### 4. 为整个测试套件定制默认值
+
+如果需要为特定的测试文件定制默认值，可以在该文件中重新模拟：
+
+```typescript
+import { vi } from 'vitest'
+
+// 重写全局模拟，添加自定义默认值
+vi.mock('@data/PreferenceService', async () => {
+  const { createMockPreferenceService } = await import('tests/__mocks__/PreferenceService')
+
+  // 定制默认值
+  const customDefaults = {
+    'my.custom.setting': 'custom_value',
+    'ui.theme': 'dark' // 覆盖默认值
+  }
+
+  return {
+    preferenceService: createMockPreferenceService(customDefaults)
+  }
+})
+```
+
+### 测试验证
+
+可以验证 PreferenceService 方法是否被正确调用：
+
+```typescript
+import { preferenceService } from '@data/PreferenceService'
+import { vi } from 'vitest'
+
+describe('Preference service calls', () => {
+  it('should call preference service methods', async () => {
+    await preferenceService.get('ui.theme')
+
+    // 验证方法调用
+    expect(preferenceService.get).toHaveBeenCalledWith('ui.theme')
+    expect(preferenceService.get).toHaveBeenCalledTimes(1)
+  })
+})
+```
+
+### 添加新的默认值
+
+当项目中添加新的偏好设置时，请在 `PreferenceService.ts` 的 `mockPreferenceDefaults` 中添加相应的默认值：
+
+```typescript
+export const mockPreferenceDefaults: Record<string, any> = {
+  // 现有默认值...
+
+  // 新增默认值
+  'new.feature.enabled': true,
+  'new.feature.config': { option: 'value' }
+}
+```
+
+这样可以确保所有测试都能使用合理的默认值，减少测试失败的可能性。
+
+## DataApiService Mock
+
+### 简介
+
+`DataApiService.ts` 提供了数据API服务的统一模拟，支持所有HTTP方法和高级功能。
+
+### 功能特性
+
+- **完整HTTP支持**: GET, POST, PUT, PATCH, DELETE
+- **批量操作**: batch() 和 transaction() 支持
+- **订阅系统**: subscribe/unsubscribe 模拟
+- **连接管理**: connect/disconnect/ping 方法
+- **智能模拟数据**: 基于路径自动生成合理的响应
+
+### 基本使用
+
+```typescript
+import { dataApiService } from '@data/DataApiService'
+
+describe('API Integration', () => {
+  it('should fetch topics', async () => {
+    // 自动模拟，返回预设的主题列表
+    const response = await dataApiService.get('/api/topics')
+    expect(response.success).toBe(true)
+    expect(response.data.topics).toHaveLength(2)
+  })
+})
+```
+
+### 高级使用
+
+```typescript
+import { MockDataApiUtils } from 'tests/__mocks__/DataApiService'
+
+describe('Custom API behavior', () => {
+  beforeEach(() => {
+    MockDataApiUtils.resetMocks()
+  })
+
+  it('should handle custom responses', async () => {
+    // 设置特定路径的自定义响应
+    MockDataApiUtils.setCustomResponse('/api/topics', 'GET', {
+      topics: [{ id: 'custom', name: 'Custom Topic' }]
+    })
+
+    const response = await dataApiService.get('/api/topics')
+    expect(response.data.topics[0].name).toBe('Custom Topic')
+  })
+
+  it('should simulate errors', async () => {
+    // 模拟错误响应
+    MockDataApiUtils.setErrorResponse('/api/topics', 'GET', 'Network error')
+
+    const response = await dataApiService.get('/api/topics')
+    expect(response.success).toBe(false)
+    expect(response.error?.message).toBe('Network error')
+  })
+})
+```
+
+## CacheService Mock
+
+### 简介
+
+`CacheService.ts` 提供了三层缓存系统的完整模拟：内存缓存、共享缓存和持久化缓存。
+
+### 功能特性
+
+- **三层架构**: 内存、共享、持久化缓存
+- **订阅系统**: 支持缓存变更订阅
+- **TTL支持**: 模拟缓存过期（简化版）
+- **Hook引用跟踪**: 模拟生产环境的引用管理
+- **默认值**: 基于缓存schema的智能默认值
+
+### 基本使用
+
+```typescript
+import { cacheService } from '@data/CacheService'
+
+describe('Cache Operations', () => {
+  it('should store and retrieve cache values', () => {
+    // 设置缓存值
+    cacheService.set('user.preferences', { theme: 'dark' })
+
+    // 获取缓存值
+    const preferences = cacheService.get('user.preferences')
+    expect(preferences.theme).toBe('dark')
+  })
+
+  it('should work with persist cache', () => {
+    // 持久化缓存操作
+    cacheService.setPersist('app.last_opened_topic', 'topic123')
+    const lastTopic = cacheService.getPersist('app.last_opened_topic')
+    expect(lastTopic).toBe('topic123')
+  })
+})
+```
+
+### 高级测试工具
+
+```typescript
+import { MockCacheUtils } from 'tests/__mocks__/CacheService'
+
+describe('Advanced cache testing', () => {
+  beforeEach(() => {
+    MockCacheUtils.resetMocks()
+  })
+
+  it('should set initial cache state', () => {
+    // 设置初始缓存状态
+    MockCacheUtils.setInitialState({
+      memory: [['theme', 'dark'], ['language', 'en']],
+      persist: [['app.version', '1.0.0']]
+    })
+
+    expect(cacheService.get('theme')).toBe('dark')
+    expect(cacheService.getPersist('app.version')).toBe('1.0.0')
+  })
+
+  it('should simulate cache changes', () => {
+    let changeCount = 0
+    cacheService.subscribe('theme', () => changeCount++)
+
+    MockCacheUtils.triggerCacheChange('theme', 'light')
+    expect(changeCount).toBe(1)
+  })
+})
+```
+
+## useDataApi Hooks Mock
+
+### 简介
+
+`useDataApi.ts` 提供了所有数据API钩子的统一模拟，包括查询、变更和分页功能。
+
+### 支持的钩子
+
+- `useQuery` - 数据查询钩子
+- `useMutation` - 数据变更钩子
+- `usePaginatedQuery` - 分页查询钩子
+- `useInvalidateCache` - 缓存失效钩子
+- `prefetch` - 预取函数
+
+### 基本使用
+
+```typescript
+import { useQuery, useMutation } from '@data/hooks/useDataApi'
+
+describe('Data API Hooks', () => {
+  it('should work with useQuery', () => {
+    const { data, isLoading, error } = useQuery('/api/topics')
+
+    // 默认返回模拟数据
+    expect(data).toBeDefined()
+    expect(data.topics).toHaveLength(2)
+    expect(isLoading).toBe(false)
+    expect(error).toBeUndefined()
+  })
+
+  it('should work with useMutation', async () => {
+    const { trigger, isMutating } = useMutation('/api/topics', 'POST')
+
+    const result = await trigger({ name: 'New Topic' })
+    expect(result.created).toBe(true)
+    expect(result.name).toBe('New Topic')
+  })
+})
+```
+
+### 自定义测试行为
+
+```typescript
+import { MockUseDataApiUtils } from 'tests/__mocks__/useDataApi'
+
+describe('Custom hook behavior', () => {
+  beforeEach(() => {
+    MockUseDataApiUtils.resetMocks()
+  })
+
+  it('should mock loading state', () => {
+    MockUseDataApiUtils.mockQueryLoading('/api/topics')
+
+    const { data, isLoading } = useQuery('/api/topics')
+    expect(isLoading).toBe(true)
+    expect(data).toBeUndefined()
+  })
+
+  it('should mock error state', () => {
+    const error = new Error('API Error')
+    MockUseDataApiUtils.mockQueryError('/api/topics', error)
+
+    const { data, error: queryError } = useQuery('/api/topics')
+    expect(queryError).toBe(error)
+    expect(data).toBeUndefined()
+  })
+})
+```
+
+## usePreference Hooks Mock
+
+### 简介
+
+`usePreference.ts` 提供了偏好设置钩子的统一模拟，支持单个和批量偏好管理。
+
+### 支持的钩子
+
+- `usePreference` - 单个偏好设置钩子
+- `useMultiplePreferences` - 多个偏好设置钩子
+
+### 基本使用
+
+```typescript
+import { usePreference, useMultiplePreferences } from '@data/hooks/usePreference'
+
+describe('Preference Hooks', () => {
+  it('should work with usePreference', async () => {
+    const [theme, setTheme] = usePreference('ui.theme')
+
+    expect(theme).toBe('light') // 默认值
+
+    await setTheme('dark')
+    // 在测试中，可以通过工具函数验证值是否更新
+  })
+
+  it('should work with multiple preferences', async () => {
+    const [prefs, setPrefs] = useMultiplePreferences({
+      theme: 'ui.theme',
+      lang: 'ui.language'
+    })
+
+    expect(prefs.theme).toBe('light')
+    expect(prefs.lang).toBe('en')
+
+    await setPrefs({ theme: 'dark' })
+  })
+})
+```
+
+### 高级测试
+
+```typescript
+import { MockUsePreferenceUtils } from 'tests/__mocks__/usePreference'
+
+describe('Advanced preference testing', () => {
+  beforeEach(() => {
+    MockUsePreferenceUtils.resetMocks()
+  })
+
+  it('should simulate preference changes', () => {
+    MockUsePreferenceUtils.setPreferenceValue('ui.theme', 'dark')
+
+    const [theme] = usePreference('ui.theme')
+    expect(theme).toBe('dark')
+  })
+
+  it('should simulate external changes', () => {
+    let callCount = 0
+    MockUsePreferenceUtils.addSubscriber('ui.theme', () => callCount++)
+
+    MockUsePreferenceUtils.simulateExternalPreferenceChange('ui.theme', 'dark')
+    expect(callCount).toBe(1)
+  })
+})
+```
+
+## useCache Hooks Mock
+
+### 简介
+
+`useCache.ts` 提供了缓存钩子的统一模拟，支持三种缓存层级。
+
+### 支持的钩子
+
+- `useCache` - 内存缓存钩子
+- `useSharedCache` - 共享缓存钩子
+- `usePersistCache` - 持久化缓存钩子
+
+### 基本使用
+
+```typescript
+import { useCache, useSharedCache, usePersistCache } from '@data/hooks/useCache'
+
+describe('Cache Hooks', () => {
+  it('should work with useCache', () => {
+    const [theme, setTheme] = useCache('ui.theme', 'light')
+
+    expect(theme).toBe('light')
+    setTheme('dark')
+    // 值立即更新
+  })
+
+  it('should work with different cache types', () => {
+    const [shared, setShared] = useSharedCache('app.window_count', 1)
+    const [persist, setPersist] = usePersistCache('app.last_version', '1.0.0')
+
+    expect(shared).toBe(1)
+    expect(persist).toBe('1.0.0')
+  })
+})
+```
+
+### 测试工具
+
+```typescript
+import { MockUseCacheUtils } from 'tests/__mocks__/useCache'
+
+describe('Cache hook testing', () => {
+  beforeEach(() => {
+    MockUseCacheUtils.resetMocks()
+  })
+
+  it('should set initial cache state', () => {
+    MockUseCacheUtils.setMultipleCacheValues({
+      memory: [['ui.theme', 'dark']],
+      shared: [['app.mode', 'development']],
+      persist: [['user.id', 'user123']]
+    })
+
+    const [theme] = useCache('ui.theme')
+    const [mode] = useSharedCache('app.mode')
+    const [userId] = usePersistCache('user.id')
+
+    expect(theme).toBe('dark')
+    expect(mode).toBe('development')
+    expect(userId).toBe('user123')
+  })
+})
+```
+
+## LoggerService Mock
+
+### 简介
+
+项目还包含了 LoggerService 的模拟：
+- `RendererLoggerService.ts` - 渲染进程日志服务模拟
+- `MainLoggerService.ts` - 主进程日志服务模拟
+
+这些模拟同样在相应的测试设置文件中全局配置。
+
+## 最佳实践
+
+1. **优先使用全局模拟**：大多数情况下应该直接使用全局配置的模拟，而不是在每个测试中单独模拟
+2. **合理的默认值**：确保模拟的默认值反映实际应用的常见配置
+3. **文档更新**：当添加新的模拟或修改现有模拟时，请更新相关文档
+4. **类型安全**：保持模拟与实际服务的类型兼容性
+5. **测试隔离**：如果需要修改模拟行为，确保在测试后恢复或在 beforeEach 中重置
+
+## 故障排除
+
+### 模拟未生效
+
+如果发现 PreferenceService 模拟未生效：
+
+1. 确认测试运行在渲染进程环境中（`vitest.config.ts` 中的 `renderer` 项目）
+2. 检查 `tests/renderer.setup.ts` 是否正确配置
+3. 确认导入路径使用的是 `@data/PreferenceService` 而非相对路径
+
+### 类型错误
+
+如果遇到 TypeScript 类型错误：
+
+1. 确认模拟实现与实际 PreferenceService 接口匹配
+2. 在测试中使用类型断言：`(preferenceService as any)._getMockState()`
+3. 检查是否需要更新模拟的类型定义

tests/__mocks__/main/CacheService.ts

@@ -0,0 +1,237 @@
+import type { CacheEntry, CacheSyncMessage } from '@shared/data/cache/cacheTypes'
+import { vi } from 'vitest'
+
+/**
+ * Mock CacheService for main process testing
+ * Simulates the complete main process CacheService functionality
+ */
+
+// Mock cache storage
+const mockMainCache = new Map<string, CacheEntry>()
+
+// Mock broadcast tracking
+const mockBroadcastCalls: Array<{ message: CacheSyncMessage; senderWindowId?: number }> = []
+
+/**
+ * Mock CacheService class
+ */
+export class MockMainCacheService {
+  private static instance: MockMainCacheService
+  private initialized = false
+
+  private constructor() {}
+
+  public static getInstance(): MockMainCacheService {
+    if (!MockMainCacheService.instance) {
+      MockMainCacheService.instance = new MockMainCacheService()
+    }
+    return MockMainCacheService.instance
+  }
+
+  // Mock initialization
+  public initialize = vi.fn(async (): Promise<void> => {
+    this.initialized = true
+  })
+
+  // Mock main process cache methods
+  public get = vi.fn(<T>(key: string): T | undefined => {
+    const entry = mockMainCache.get(key)
+    if (!entry) return undefined
+
+    // Check TTL (lazy cleanup)
+    if (entry.expireAt && Date.now() > entry.expireAt) {
+      mockMainCache.delete(key)
+      return undefined
+    }
+
+    return entry.value as T
+  })
+
+  public set = vi.fn(<T>(key: string, value: T, ttl?: number): void => {
+    const entry: CacheEntry<T> = {
+      value,
+      expireAt: ttl ? Date.now() + ttl : undefined
+    }
+    mockMainCache.set(key, entry)
+  })
+
+  public has = vi.fn((key: string): boolean => {
+    const entry = mockMainCache.get(key)
+    if (!entry) return false
+
+    // Check TTL
+    if (entry.expireAt && Date.now() > entry.expireAt) {
+      mockMainCache.delete(key)
+      return false
+    }
+
+    return true
+  })
+
+  public delete = vi.fn((key: string): boolean => {
+    return mockMainCache.delete(key)
+  })
+
+  // Mock cleanup
+  public cleanup = vi.fn((): void => {
+    mockMainCache.clear()
+    mockBroadcastCalls.length = 0
+  })
+
+  // Private methods exposed for testing
+  private broadcastSync = vi.fn((message: CacheSyncMessage, senderWindowId?: number): void => {
+    mockBroadcastCalls.push({ message, senderWindowId })
+  })
+
+  private setupIpcHandlers = vi.fn((): void => {
+    // Mock IPC handler setup
+  })
+}
+
+// Mock singleton instance
+const mockInstance = MockMainCacheService.getInstance()
+
+/**
+ * Export mock service
+ */
+export const MockMainCacheServiceExport = {
+  CacheService: MockMainCacheService,
+  cacheService: mockInstance
+}
+
+/**
+ * Utility functions for testing
+ */
+export const MockMainCacheServiceUtils = {
+  /**
+   * Reset all mock call counts and state
+   */
+  resetMocks: () => {
+    // Reset all method mocks
+    Object.values(mockInstance).forEach(method => {
+      if (vi.isMockFunction(method)) {
+        method.mockClear()
+      }
+    })
+
+    // Reset cache state
+    mockMainCache.clear()
+    mockBroadcastCalls.length = 0
+
+    // Reset initialized state
+    mockInstance['initialized'] = false
+  },
+
+  /**
+   * Set cache value for testing
+   */
+  setCacheValue: <T>(key: string, value: T, ttl?: number) => {
+    const entry: CacheEntry<T> = {
+      value,
+      expireAt: ttl ? Date.now() + ttl : undefined
+    }
+    mockMainCache.set(key, entry)
+  },
+
+  /**
+   * Get cache value for testing
+   */
+  getCacheValue: <T>(key: string): T | undefined => {
+    const entry = mockMainCache.get(key)
+    if (!entry) return undefined
+
+    // Check TTL
+    if (entry.expireAt && Date.now() > entry.expireAt) {
+      mockMainCache.delete(key)
+      return undefined
+    }
+
+    return entry.value as T
+  },
+
+  /**
+   * Set initialization state for testing
+   */
+  setInitialized: (initialized: boolean) => {
+    mockInstance['initialized'] = initialized
+  },
+
+  /**
+   * Get current initialization state
+   */
+  isInitialized: (): boolean => {
+    return mockInstance['initialized']
+  },
+
+  /**
+   * Get all cache entries for testing
+   */
+  getAllCacheEntries: (): Map<string, CacheEntry> => {
+    return new Map(mockMainCache)
+  },
+
+  /**
+   * Get broadcast call history for testing
+   */
+  getBroadcastHistory: (): Array<{ message: CacheSyncMessage; senderWindowId?: number }> => {
+    return [...mockBroadcastCalls]
+  },
+
+  /**
+   * Simulate cache sync broadcast
+   */
+  simulateCacheSync: (message: CacheSyncMessage, senderWindowId?: number) => {
+    mockBroadcastCalls.push({ message, senderWindowId })
+  },
+
+  /**
+   * Set multiple cache values at once
+   */
+  setMultipleCacheValues: (values: Array<[string, any, number?]>) => {
+    values.forEach(([key, value, ttl]) => {
+      const entry: CacheEntry = {
+        value,
+        expireAt: ttl ? Date.now() + ttl : undefined
+      }
+      mockMainCache.set(key, entry)
+    })
+  },
+
+  /**
+   * Simulate cache expiration for testing
+   */
+  simulateCacheExpiration: (key: string) => {
+    const entry = mockMainCache.get(key)
+    if (entry) {
+      entry.expireAt = Date.now() - 1000 // Set to expired
+    }
+  },
+
+  /**
+   * Get cache statistics
+   */
+  getCacheStats: () => ({
+    totalEntries: mockMainCache.size,
+    broadcastCalls: mockBroadcastCalls.length,
+    keys: Array.from(mockMainCache.keys())
+  }),
+
+  /**
+   * Mock initialization error
+   */
+  simulateInitializationError: (error: Error) => {
+    mockInstance.initialize.mockRejectedValue(error)
+  },
+
+  /**
+   * Get mock call counts for debugging
+   */
+  getMockCallCounts: () => ({
+    initialize: mockInstance.initialize.mock.calls.length,
+    get: mockInstance.get.mock.calls.length,
+    set: mockInstance.set.mock.calls.length,
+    has: mockInstance.has.mock.calls.length,
+    delete: mockInstance.delete.mock.calls.length,
+    cleanup: mockInstance.cleanup.mock.calls.length
+  })
+}

tests/__mocks__/main/DataApiService.ts

@@ -0,0 +1,169 @@
+import { vi } from 'vitest'
+
+/**
+ * Mock DataApiService for main process testing
+ * Simulates the complete main process DataApiService functionality
+ */
+
+/**
+ * Mock ApiServer class
+ */
+class MockApiServer {
+  public initialize = vi.fn(() => new MockApiServer())
+
+  public getSystemInfo = vi.fn(() => ({
+    server: 'MockApiServer',
+    version: '1.0.0',
+    handlers: ['test-handler'],
+    middlewares: ['test-middleware']
+  }))
+}
+
+/**
+ * Mock IpcAdapter class
+ */
+class MockIpcAdapter {
+  public setupHandlers = vi.fn()
+  public removeHandlers = vi.fn()
+  public isInitialized = vi.fn(() => true)
+}
+
+/**
+ * Mock DataApiService class
+ */
+export class MockMainDataApiService {
+  private static instance: MockMainDataApiService
+  private initialized = false
+  private apiServer: MockApiServer
+  private ipcAdapter: MockIpcAdapter
+
+  private constructor() {
+    this.apiServer = new MockApiServer()
+    this.ipcAdapter = new MockIpcAdapter()
+  }
+
+  public static getInstance(): MockMainDataApiService {
+    if (!MockMainDataApiService.instance) {
+      MockMainDataApiService.instance = new MockMainDataApiService()
+    }
+    return MockMainDataApiService.instance
+  }
+
+  // Mock initialization
+  public initialize = vi.fn(async (): Promise<void> => {
+    this.initialized = true
+  })
+
+  // Mock system status
+  public getSystemStatus = vi.fn(() => {
+    if (!this.initialized) {
+      return {
+        initialized: false,
+        error: 'DataApiService not initialized'
+      }
+    }
+
+    return {
+      initialized: true,
+      ipcInitialized: true,
+      server: 'MockApiServer',
+      version: '1.0.0',
+      handlers: ['test-handler'],
+      middlewares: ['test-middleware']
+    }
+  })
+
+  // Mock API server access
+  public getApiServer = vi.fn((): MockApiServer => {
+    return this.apiServer
+  })
+
+  // Mock shutdown
+  public shutdown = vi.fn(async (): Promise<void> => {
+    this.initialized = false
+  })
+}
+
+// Mock singleton instance
+const mockInstance = MockMainDataApiService.getInstance()
+
+/**
+ * Export mock service
+ */
+export const MockMainDataApiServiceExport = {
+  DataApiService: MockMainDataApiService,
+  dataApiService: mockInstance
+}
+
+/**
+ * Mock API components for advanced testing
+ */
+export const MockApiComponents = {
+  ApiServer: MockApiServer,
+  IpcAdapter: MockIpcAdapter
+}
+
+/**
+ * Utility functions for testing
+ */
+export const MockMainDataApiServiceUtils = {
+  /**
+   * Reset all mock call counts and state
+   */
+  resetMocks: () => {
+    // Reset all method mocks
+    Object.values(mockInstance).forEach(method => {
+      if (vi.isMockFunction(method)) {
+        method.mockClear()
+      }
+    })
+
+    // Reset initialized state
+    mockInstance['initialized'] = false
+  },
+
+  /**
+   * Set initialization state for testing
+   */
+  setInitialized: (initialized: boolean) => {
+    mockInstance['initialized'] = initialized
+  },
+
+  /**
+   * Get current initialization state
+   */
+  isInitialized: (): boolean => {
+    return mockInstance['initialized']
+  },
+
+  /**
+   * Mock system info for testing
+   */
+  mockSystemInfo: (info: Record<string, any>) => {
+    mockInstance.getApiServer().getSystemInfo.mockReturnValue(info)
+  },
+
+  /**
+   * Simulate initialization error
+   */
+  simulateInitializationError: (error: Error) => {
+    mockInstance.initialize.mockRejectedValue(error)
+  },
+
+  /**
+   * Simulate shutdown error
+   */
+  simulateShutdownError: (error: Error) => {
+    mockInstance.shutdown.mockRejectedValue(error)
+  },
+
+  /**
+   * Get mock call counts for debugging
+   */
+  getMockCallCounts: () => ({
+    initialize: mockInstance.initialize.mock.calls.length,
+    shutdown: mockInstance.shutdown.mock.calls.length,
+    getSystemStatus: mockInstance.getSystemStatus.mock.calls.length,
+    getApiServer: mockInstance.getApiServer.mock.calls.length
+  })
+}

tests/__mocks__/main/PreferenceService.ts

@@ -0,0 +1,286 @@
+import type {
+  PreferenceDefaultScopeType,
+  PreferenceKeyType
+} from '@shared/data/preference/preferenceTypes'
+import { DefaultPreferences } from '@shared/data/preference/preferenceSchemas'
+import { vi } from 'vitest'
+
+/**
+ * Mock PreferenceService for main process testing
+ * Simulates the complete main process PreferenceService functionality
+ */
+
+// Mock preference state storage
+const mockPreferenceState = new Map<PreferenceKeyType, any>()
+
+// Initialize with defaults
+Object.entries(DefaultPreferences.default).forEach(([key, value]) => {
+  mockPreferenceState.set(key as PreferenceKeyType, value)
+})
+
+// Mock subscription tracking
+const mockSubscriptions = new Map<number, Set<string>>() // windowId -> Set<keys>
+const mockMainSubscribers = new Map<string, Set<(newValue: any, oldValue?: any) => void>>()
+
+// Helper function to notify main process subscribers
+const notifyMainSubscribers = (key: string, newValue: any, oldValue?: any) => {
+  const subscribers = mockMainSubscribers.get(key)
+  if (subscribers) {
+    subscribers.forEach(callback => {
+      try {
+        callback(newValue, oldValue)
+      } catch (error) {
+        console.warn('Mock PreferenceService: Main subscriber callback error:', error)
+      }
+    })
+  }
+}
+
+/**
+ * Mock PreferenceService class
+ */
+export class MockMainPreferenceService {
+  private static instance: MockMainPreferenceService
+  private initialized = false
+
+  private constructor() {}
+
+  public static getInstance(): MockMainPreferenceService {
+    if (!MockMainPreferenceService.instance) {
+      MockMainPreferenceService.instance = new MockMainPreferenceService()
+    }
+    return MockMainPreferenceService.instance
+  }
+
+  // Mock initialization
+  public initialize = vi.fn(async (): Promise<void> => {
+    this.initialized = true
+  })
+
+  // Mock get method
+  public get = vi.fn(<K extends PreferenceKeyType>(key: K): PreferenceDefaultScopeType[K] => {
+    return mockPreferenceState.get(key) ?? DefaultPreferences.default[key]
+  })
+
+  // Mock set method
+  public set = vi.fn(async <K extends PreferenceKeyType>(
+    key: K,
+    value: PreferenceDefaultScopeType[K]
+  ): Promise<void> => {
+    const oldValue = mockPreferenceState.get(key)
+    mockPreferenceState.set(key, value)
+    notifyMainSubscribers(key, value, oldValue)
+  })
+
+  // Mock getMultiple method
+  public getMultiple = vi.fn(<K extends PreferenceKeyType>(keys: K[]) => {
+    const result: any = {}
+    keys.forEach(key => {
+      result[key] = mockPreferenceState.get(key) ?? DefaultPreferences.default[key]
+    })
+    return result
+  })
+
+  // Mock setMultiple method
+  public setMultiple = vi.fn(async (updates: Partial<PreferenceDefaultScopeType>): Promise<void> => {
+    Object.entries(updates).forEach(([key, value]) => {
+      if (value !== undefined) {
+        const oldValue = mockPreferenceState.get(key as PreferenceKeyType)
+        mockPreferenceState.set(key as PreferenceKeyType, value)
+        notifyMainSubscribers(key, value, oldValue)
+      }
+    })
+  })
+
+  // Mock subscription methods
+  public subscribeForWindow = vi.fn((windowId: number, keys: string[]): void => {
+    if (!mockSubscriptions.has(windowId)) {
+      mockSubscriptions.set(windowId, new Set())
+    }
+    const windowKeys = mockSubscriptions.get(windowId)!
+    keys.forEach(key => windowKeys.add(key))
+  })
+
+  public unsubscribeForWindow = vi.fn((windowId: number): void => {
+    mockSubscriptions.delete(windowId)
+  })
+
+  // Mock main process subscription methods
+  public subscribeChange = vi.fn(<K extends PreferenceKeyType>(
+    key: K,
+    callback: (newValue: PreferenceDefaultScopeType[K], oldValue?: PreferenceDefaultScopeType[K]) => void
+  ): (() => void) => {
+    if (!mockMainSubscribers.has(key)) {
+      mockMainSubscribers.set(key, new Set())
+    }
+    mockMainSubscribers.get(key)!.add(callback)
+
+    // Return unsubscribe function
+    return () => {
+      const subscribers = mockMainSubscribers.get(key)
+      if (subscribers) {
+        subscribers.delete(callback)
+        if (subscribers.size === 0) {
+          mockMainSubscribers.delete(key)
+        }
+      }
+    }
+  })
+
+  public subscribeMultipleChanges = vi.fn((
+    keys: PreferenceKeyType[],
+    callback: (key: PreferenceKeyType, newValue: any, oldValue: any) => void
+  ): (() => void) => {
+    const unsubscribeFunctions = keys.map(key =>
+      this.subscribeChange(key, (newValue, oldValue) => callback(key, newValue, oldValue))
+    )
+
+    return () => {
+      unsubscribeFunctions.forEach(unsubscribe => unsubscribe())
+    }
+  })
+
+  // Mock utility methods
+  public getAll = vi.fn((): PreferenceDefaultScopeType => {
+    const result: any = {}
+    Object.keys(DefaultPreferences.default).forEach(key => {
+      result[key] = mockPreferenceState.get(key as PreferenceKeyType) ?? DefaultPreferences.default[key as PreferenceKeyType]
+    })
+    return result
+  })
+
+  public getSubscriptions = vi.fn(() => new Map(mockSubscriptions))
+
+  public removeAllChangeListeners = vi.fn((): void => {
+    mockMainSubscribers.clear()
+  })
+
+  public getChangeListenerCount = vi.fn((): number => {
+    let total = 0
+    mockMainSubscribers.forEach(subscribers => {
+      total += subscribers.size
+    })
+    return total
+  })
+
+  public getKeyListenerCount = vi.fn((key: PreferenceKeyType): number => {
+    return mockMainSubscribers.get(key)?.size ?? 0
+  })
+
+  public getSubscribedKeys = vi.fn((): string[] => {
+    return Array.from(mockMainSubscribers.keys())
+  })
+
+  public getSubscriptionStats = vi.fn((): Record<string, number> => {
+    const stats: Record<string, number> = {}
+    mockMainSubscribers.forEach((subscribers, key) => {
+      stats[key] = subscribers.size
+    })
+    return stats
+  })
+
+  // Static methods
+  public static registerIpcHandler = vi.fn((): void => {
+    // Mock IPC handler registration
+  })
+}
+
+// Mock singleton instance
+const mockInstance = MockMainPreferenceService.getInstance()
+
+/**
+ * Export mock service
+ */
+export const MockMainPreferenceServiceExport = {
+  PreferenceService: MockMainPreferenceService,
+  preferenceService: mockInstance
+}
+
+/**
+ * Utility functions for testing
+ */
+export const MockMainPreferenceServiceUtils = {
+  /**
+   * Reset all mock call counts and state
+   */
+  resetMocks: () => {
+    // Reset all method mocks
+    Object.values(mockInstance).forEach(method => {
+      if (vi.isMockFunction(method)) {
+        method.mockClear()
+      }
+    })
+
+    // Reset state to defaults
+    mockPreferenceState.clear()
+    Object.entries(DefaultPreferences.default).forEach(([key, value]) => {
+      mockPreferenceState.set(key as PreferenceKeyType, value)
+    })
+
+    // Clear subscriptions
+    mockSubscriptions.clear()
+    mockMainSubscribers.clear()
+  },
+
+  /**
+   * Set a preference value for testing
+   */
+  setPreferenceValue: <K extends PreferenceKeyType>(key: K, value: PreferenceDefaultScopeType[K]) => {
+    const oldValue = mockPreferenceState.get(key)
+    mockPreferenceState.set(key, value)
+    notifyMainSubscribers(key, value, oldValue)
+  },
+
+  /**
+   * Get current preference value
+   */
+  getPreferenceValue: <K extends PreferenceKeyType>(key: K): PreferenceDefaultScopeType[K] => {
+    return mockPreferenceState.get(key) ?? DefaultPreferences.default[key]
+  },
+
+  /**
+   * Set multiple preference values for testing
+   */
+  setMultiplePreferenceValues: (values: Record<string, any>) => {
+    Object.entries(values).forEach(([key, value]) => {
+      const oldValue = mockPreferenceState.get(key as PreferenceKeyType)
+      mockPreferenceState.set(key as PreferenceKeyType, value)
+      notifyMainSubscribers(key, value, oldValue)
+    })
+  },
+
+  /**
+   * Get all current preference values
+   */
+  getAllPreferenceValues: (): Record<string, any> => {
+    const result: Record<string, any> = {}
+    mockPreferenceState.forEach((value, key) => {
+      result[key] = value
+    })
+    return result
+  },
+
+  /**
+   * Simulate window subscription
+   */
+  simulateWindowSubscription: (windowId: number, keys: string[]) => {
+    mockInstance.subscribeForWindow(windowId, keys)
+  },
+
+  /**
+   * Simulate external preference change
+   */
+  simulateExternalPreferenceChange: <K extends PreferenceKeyType>(key: K, value: PreferenceDefaultScopeType[K]) => {
+    const oldValue = mockPreferenceState.get(key)
+    mockPreferenceState.set(key, value)
+    notifyMainSubscribers(key, value, oldValue)
+  },
+
+  /**
+   * Get subscription counts for debugging
+   */
+  getSubscriptionCounts: () => ({
+    windows: Array.from(mockSubscriptions.entries()).map(([windowId, keys]) => [windowId, keys.size]),
+    mainSubscribers: Array.from(mockMainSubscribers.entries()).map(([key, subs]) => [key, subs.size])
+  })
+}

tests/__mocks__/renderer/CacheService.ts

@@ -0,0 +1,389 @@
+import type {
+  RendererPersistCacheKey,
+  RendererPersistCacheSchema,
+  UseCacheKey,
+  UseCacheSchema,
+  UseSharedCacheKey,
+  UseSharedCacheSchema
+} from '@shared/data/cache/cacheSchemas'
+import { DefaultRendererPersistCache, DefaultUseCache, DefaultUseSharedCache } from '@shared/data/cache/cacheSchemas'
+import type { CacheSubscriber } from '@shared/data/cache/cacheTypes'
+import { vi } from 'vitest'
+
+/**
+ * Mock CacheService for testing
+ * Provides a comprehensive mock of the three-layer cache system
+ */
+
+/**
+ * Create a mock CacheService with realistic behavior
+ */
+export const createMockCacheService = (options: {
+  initialMemoryCache?: Map<string, any>
+  initialSharedCache?: Map<string, any>
+  initialPersistCache?: Map<RendererPersistCacheKey, any>
+} = {}) => {
+  // Mock cache storage
+  const memoryCache = new Map<string, any>(options.initialMemoryCache || [])
+  const sharedCache = new Map<string, any>(options.initialSharedCache || [])
+  const persistCache = new Map<RendererPersistCacheKey, any>(options.initialPersistCache || [])
+
+  // Mock subscribers
+  const subscribers = new Map<string, Set<CacheSubscriber>>()
+
+  // Helper function to notify subscribers
+  const notifySubscribers = (key: string, value: any) => {
+    const keySubscribers = subscribers.get(key)
+    if (keySubscribers) {
+      keySubscribers.forEach(callback => {
+        try {
+          callback()
+        } catch (error) {
+          console.warn('Mock CacheService: Subscriber callback error:', error)
+        }
+      })
+    }
+  }
+
+  const mockCacheService = {
+    // Memory cache methods
+    get: vi.fn(<T>(key: string): T | null => {
+      if (memoryCache.has(key)) {
+        return memoryCache.get(key) as T
+      }
+      // Return default values for known cache keys
+      const defaultValue = getDefaultValueForKey(key)
+      return defaultValue !== undefined ? defaultValue : null
+    }),
+
+    set: vi.fn(<T>(key: string, value: T, ttl?: number): void => {
+      const oldValue = memoryCache.get(key)
+      memoryCache.set(key, value)
+      if (oldValue !== value) {
+        notifySubscribers(key, value)
+      }
+    }),
+
+    delete: vi.fn((key: string): boolean => {
+      const existed = memoryCache.has(key)
+      memoryCache.delete(key)
+      if (existed) {
+        notifySubscribers(key, null)
+      }
+      return existed
+    }),
+
+    clear: vi.fn((): void => {
+      const keys = Array.from(memoryCache.keys())
+      memoryCache.clear()
+      keys.forEach(key => notifySubscribers(key, null))
+    }),
+
+    has: vi.fn((key: string): boolean => {
+      return memoryCache.has(key)
+    }),
+
+    size: vi.fn((): number => {
+      return memoryCache.size
+    }),
+
+    // Shared cache methods
+    getShared: vi.fn(<T>(key: string): T | null => {
+      if (sharedCache.has(key)) {
+        return sharedCache.get(key) as T
+      }
+      const defaultValue = getDefaultSharedValueForKey(key)
+      return defaultValue !== undefined ? defaultValue : null
+    }),
+
+    setShared: vi.fn(<T>(key: string, value: T, ttl?: number): void => {
+      const oldValue = sharedCache.get(key)
+      sharedCache.set(key, value)
+      if (oldValue !== value) {
+        notifySubscribers(`shared:${key}`, value)
+      }
+    }),
+
+    deleteShared: vi.fn((key: string): boolean => {
+      const existed = sharedCache.has(key)
+      sharedCache.delete(key)
+      if (existed) {
+        notifySubscribers(`shared:${key}`, null)
+      }
+      return existed
+    }),
+
+    clearShared: vi.fn((): void => {
+      const keys = Array.from(sharedCache.keys())
+      sharedCache.clear()
+      keys.forEach(key => notifySubscribers(`shared:${key}`, null))
+    }),
+
+    // Persist cache methods
+    getPersist: vi.fn(<K extends RendererPersistCacheKey>(key: K): RendererPersistCacheSchema[K] => {
+      if (persistCache.has(key)) {
+        return persistCache.get(key) as RendererPersistCacheSchema[K]
+      }
+      return DefaultRendererPersistCache[key]
+    }),
+
+    setPersist: vi.fn(<K extends RendererPersistCacheKey>(key: K, value: RendererPersistCacheSchema[K]): void => {
+      const oldValue = persistCache.get(key)
+      persistCache.set(key, value)
+      if (oldValue !== value) {
+        notifySubscribers(`persist:${key}`, value)
+      }
+    }),
+
+    deletePersist: vi.fn(<K extends RendererPersistCacheKey>(key: K): boolean => {
+      const existed = persistCache.has(key)
+      persistCache.delete(key)
+      if (existed) {
+        notifySubscribers(`persist:${key}`, DefaultRendererPersistCache[key])
+      }
+      return existed
+    }),
+
+    clearPersist: vi.fn((): void => {
+      const keys = Array.from(persistCache.keys()) as RendererPersistCacheKey[]
+      persistCache.clear()
+      keys.forEach(key => notifySubscribers(`persist:${key}`, DefaultRendererPersistCache[key]))
+    }),
+
+    // Subscription methods
+    subscribe: vi.fn((key: string, callback: CacheSubscriber): (() => void) => {
+      if (!subscribers.has(key)) {
+        subscribers.set(key, new Set())
+      }
+      subscribers.get(key)!.add(callback)
+
+      // Return unsubscribe function
+      return () => {
+        const keySubscribers = subscribers.get(key)
+        if (keySubscribers) {
+          keySubscribers.delete(callback)
+          if (keySubscribers.size === 0) {
+            subscribers.delete(key)
+          }
+        }
+      }
+    }),
+
+    unsubscribe: vi.fn((key: string, callback?: CacheSubscriber): void => {
+      if (callback) {
+        const keySubscribers = subscribers.get(key)
+        if (keySubscribers) {
+          keySubscribers.delete(callback)
+          if (keySubscribers.size === 0) {
+            subscribers.delete(key)
+          }
+        }
+      } else {
+        subscribers.delete(key)
+      }
+    }),
+
+    // Hook reference tracking (for advanced cache management)
+    addHookReference: vi.fn((key: string): void => {
+      // Mock implementation - in real service this prevents cache cleanup
+    }),
+
+    removeHookReference: vi.fn((key: string): void => {
+      // Mock implementation
+    }),
+
+    // Utility methods
+    getAllKeys: vi.fn((): string[] => {
+      return Array.from(memoryCache.keys())
+    }),
+
+    getStats: vi.fn(() => ({
+      memorySize: memoryCache.size,
+      sharedSize: sharedCache.size,
+      persistSize: persistCache.size,
+      subscriberCount: subscribers.size
+    })),
+
+    // Internal state access for testing
+    _getMockState: () => ({
+      memoryCache: new Map(memoryCache),
+      sharedCache: new Map(sharedCache),
+      persistCache: new Map(persistCache),
+      subscribers: new Map(subscribers)
+    }),
+
+    _resetMockState: () => {
+      memoryCache.clear()
+      sharedCache.clear()
+      persistCache.clear()
+      subscribers.clear()
+    }
+  }
+
+  return mockCacheService
+}
+
+/**
+ * Get default value for cache keys based on schema
+ */
+function getDefaultValueForKey(key: string): any {
+  // Try to match against known cache schemas
+  if (key in DefaultUseCache) {
+    return DefaultUseCache[key as UseCacheKey]
+  }
+  return undefined
+}
+
+function getDefaultSharedValueForKey(key: string): any {
+  if (key in DefaultUseSharedCache) {
+    return DefaultUseSharedCache[key as UseSharedCacheKey]
+  }
+  return undefined
+}
+
+// Default mock instance
+export const mockCacheService = createMockCacheService()
+
+// Singleton instance mock
+export const MockCacheService = {
+  CacheService: class MockCacheService {
+    static getInstance() {
+      return mockCacheService
+    }
+
+    // Delegate all methods to the mock
+    get<T>(key: string): T | null {
+      return mockCacheService.get<T>(key)
+    }
+
+    set<T>(key: string, value: T, ttl?: number): void {
+      return mockCacheService.set(key, value, ttl)
+    }
+
+    delete(key: string): boolean {
+      return mockCacheService.delete(key)
+    }
+
+    clear(): void {
+      return mockCacheService.clear()
+    }
+
+    has(key: string): boolean {
+      return mockCacheService.has(key)
+    }
+
+    size(): number {
+      return mockCacheService.size()
+    }
+
+    getShared<T>(key: string): T | null {
+      return mockCacheService.getShared<T>(key)
+    }
+
+    setShared<T>(key: string, value: T, ttl?: number): void {
+      return mockCacheService.setShared(key, value, ttl)
+    }
+
+    deleteShared(key: string): boolean {
+      return mockCacheService.deleteShared(key)
+    }
+
+    clearShared(): void {
+      return mockCacheService.clearShared()
+    }
+
+    getPersist<K extends RendererPersistCacheKey>(key: K): RendererPersistCacheSchema[K] {
+      return mockCacheService.getPersist(key)
+    }
+
+    setPersist<K extends RendererPersistCacheKey>(key: K, value: RendererPersistCacheSchema[K]): void {
+      return mockCacheService.setPersist(key, value)
+    }
+
+    deletePersist<K extends RendererPersistCacheKey>(key: K): boolean {
+      return mockCacheService.deletePersist(key)
+    }
+
+    clearPersist(): void {
+      return mockCacheService.clearPersist()
+    }
+
+    subscribe(key: string, callback: CacheSubscriber): () => void {
+      return mockCacheService.subscribe(key, callback)
+    }
+
+    unsubscribe(key: string, callback?: CacheSubscriber): void {
+      return mockCacheService.unsubscribe(key, callback)
+    }
+
+    addHookReference(key: string): void {
+      return mockCacheService.addHookReference(key)
+    }
+
+    removeHookReference(key: string): void {
+      return mockCacheService.removeHookReference(key)
+    }
+
+    getAllKeys(): string[] {
+      return mockCacheService.getAllKeys()
+    }
+
+    getStats() {
+      return mockCacheService.getStats()
+    }
+  },
+  cacheService: mockCacheService
+}
+
+/**
+ * Utility functions for testing
+ */
+export const MockCacheUtils = {
+  /**
+   * Reset all mock function call counts and state
+   */
+  resetMocks: () => {
+    Object.values(mockCacheService).forEach(method => {
+      if (vi.isMockFunction(method)) {
+        method.mockClear()
+      }
+    })
+    if ('_resetMockState' in mockCacheService) {
+      ;(mockCacheService as any)._resetMockState()
+    }
+  },
+
+  /**
+   * Set initial cache state for testing
+   */
+  setInitialState: (state: {
+    memory?: Array<[string, any]>
+    shared?: Array<[string, any]>
+    persist?: Array<[RendererPersistCacheKey, any]>
+  }) => {
+    if ('_resetMockState' in mockCacheService) {
+      ;(mockCacheService as any)._resetMockState()
+    }
+
+    state.memory?.forEach(([key, value]) => mockCacheService.set(key, value))
+    state.shared?.forEach(([key, value]) => mockCacheService.setShared(key, value))
+    state.persist?.forEach(([key, value]) => mockCacheService.setPersist(key, value))
+  },
+
+  /**
+   * Get current mock state for inspection
+   */
+  getCurrentState: () => {
+    if ('_getMockState' in mockCacheService) {
+      return (mockCacheService as any)._getMockState()
+    }
+    return null
+  },
+
+  /**
+   * Simulate cache events for testing subscribers
+   */
+  triggerCacheChange: (key: string, value: any) => {
+    mockCacheService.set(key, value)
+  }
+}

tests/__mocks__/renderer/DataApiService.ts

@@ -0,0 +1,326 @@
+import type { ConcreteApiPaths } from '@shared/data/api/apiSchemas'
+import type {
+  ApiClient,
+  BatchRequest,
+  BatchResponse,
+  DataRequest,
+  DataResponse,
+  SubscriptionCallback,
+  SubscriptionOptions,
+  TransactionRequest
+} from '@shared/data/api/apiTypes'
+import { vi } from 'vitest'
+
+/**
+ * Mock DataApiService for testing
+ * Provides a comprehensive mock of the DataApiService with realistic behavior
+ */
+
+// Mock response utilities
+const createMockResponse = <T>(data: T, success = true): DataResponse<T> => ({
+  success,
+  data,
+  timestamp: new Date().toISOString(),
+  ...(success ? {} : { error: { code: 'MOCK_ERROR', message: 'Mock error', details: {} } })
+})
+
+const createMockError = (message: string): DataResponse<never> => ({
+  success: false,
+  error: {
+    code: 'MOCK_ERROR',
+    message,
+    details: {}
+  },
+  timestamp: new Date().toISOString()
+})
+
+/**
+ * Mock implementation of DataApiService
+ */
+export const createMockDataApiService = (customBehavior: Partial<ApiClient> = {}): ApiClient => {
+  const mockService: ApiClient = {
+    // HTTP Methods
+    get: vi.fn(async (path: ConcreteApiPaths, options?: any) => {
+      // Default mock behavior - return empty data based on path
+      const mockData = getMockDataForPath(path, 'GET')
+      return createMockResponse(mockData)
+    }),
+
+    post: vi.fn(async (path: ConcreteApiPaths, options?: any) => {
+      const mockData = getMockDataForPath(path, 'POST')
+      return createMockResponse(mockData)
+    }),
+
+    put: vi.fn(async (path: ConcreteApiPaths, options?: any) => {
+      const mockData = getMockDataForPath(path, 'PUT')
+      return createMockResponse(mockData)
+    }),
+
+    patch: vi.fn(async (path: ConcreteApiPaths, options?: any) => {
+      const mockData = getMockDataForPath(path, 'PATCH')
+      return createMockResponse(mockData)
+    }),
+
+    delete: vi.fn(async (path: ConcreteApiPaths, options?: any) => {
+      return createMockResponse({ deleted: true })
+    }),
+
+    // Batch operations
+    batch: vi.fn(async (requests: BatchRequest[]): Promise<BatchResponse> => {
+      const responses = requests.map((request, index) => ({
+        id: request.id || `batch_${index}`,
+        success: true,
+        data: getMockDataForPath(request.path as ConcreteApiPaths, request.method),
+        timestamp: new Date().toISOString()
+      }))
+
+      return {
+        success: true,
+        responses,
+        timestamp: new Date().toISOString()
+      }
+    }),
+
+    // Transaction support
+    transaction: vi.fn(async (operations: TransactionRequest[]): Promise<DataResponse<any[]>> => {
+      const results = operations.map((op, index) => ({
+        operation: op.operation,
+        result: getMockDataForPath(op.path as ConcreteApiPaths, 'POST'),
+        success: true
+      }))
+
+      return createMockResponse(results)
+    }),
+
+    // Subscription methods
+    subscribe: vi.fn((path: ConcreteApiPaths, callback: SubscriptionCallback, options?: SubscriptionOptions) => {
+      // Return a mock unsubscribe function
+      return vi.fn()
+    }),
+
+    unsubscribe: vi.fn((path: ConcreteApiPaths) => {
+      // Mock unsubscribe
+    }),
+
+    // Connection management
+    connect: vi.fn(async () => {
+      return createMockResponse({ connected: true })
+    }),
+
+    disconnect: vi.fn(async () => {
+      return createMockResponse({ disconnected: true })
+    }),
+
+    // Health check
+    ping: vi.fn(async () => {
+      return createMockResponse({ pong: true, timestamp: new Date().toISOString() })
+    }),
+
+    // Apply custom behavior overrides
+    ...customBehavior
+  }
+
+  return mockService
+}
+
+/**
+ * Get mock data based on API path and method
+ * Provides realistic mock responses for common API endpoints
+ */
+function getMockDataForPath(path: ConcreteApiPaths, method: string): any {
+  // Parse path to determine data type
+  if (path.includes('/topics')) {
+    if (method === 'GET' && path.endsWith('/topics')) {
+      return {
+        topics: [
+          { id: 'topic1', name: 'Mock Topic 1', createdAt: '2024-01-01T00:00:00Z' },
+          { id: 'topic2', name: 'Mock Topic 2', createdAt: '2024-01-02T00:00:00Z' }
+        ],
+        total: 2
+      }
+    }
+    if (method === 'GET' && path.match(/\/topics\/[^/]+$/)) {
+      return {
+        id: 'topic1',
+        name: 'Mock Topic',
+        messages: [],
+        createdAt: '2024-01-01T00:00:00Z'
+      }
+    }
+    if (method === 'POST' && path.endsWith('/topics')) {
+      return {
+        id: 'new_topic',
+        name: 'New Mock Topic',
+        createdAt: new Date().toISOString()
+      }
+    }
+  }
+
+  if (path.includes('/messages')) {
+    if (method === 'GET') {
+      return {
+        messages: [
+          { id: 'msg1', content: 'Mock message 1', role: 'user', timestamp: '2024-01-01T00:00:00Z' },
+          { id: 'msg2', content: 'Mock message 2', role: 'assistant', timestamp: '2024-01-01T00:01:00Z' }
+        ],
+        total: 2
+      }
+    }
+    if (method === 'POST') {
+      return {
+        id: 'new_message',
+        content: 'New mock message',
+        role: 'user',
+        timestamp: new Date().toISOString()
+      }
+    }
+  }
+
+  if (path.includes('/preferences')) {
+    if (method === 'GET') {
+      return {
+        preferences: {
+          'ui.theme': 'light',
+          'ui.language': 'en',
+          'data.export.format': 'markdown'
+        }
+      }
+    }
+    if (method === 'POST' || method === 'PUT') {
+      return { updated: true, timestamp: new Date().toISOString() }
+    }
+  }
+
+  // Default mock data
+  return {
+    id: 'mock_id',
+    data: 'mock_data',
+    timestamp: new Date().toISOString()
+  }
+}
+
+// Default mock instance
+export const mockDataApiService = createMockDataApiService()
+
+// Singleton instance mock
+export const MockDataApiService = {
+  DataApiService: class MockDataApiService {
+    static getInstance() {
+      return mockDataApiService
+    }
+
+    // Instance methods delegate to the mock
+    async get(path: ConcreteApiPaths, options?: any) {
+      return mockDataApiService.get(path, options)
+    }
+
+    async post(path: ConcreteApiPaths, options?: any) {
+      return mockDataApiService.post(path, options)
+    }
+
+    async put(path: ConcreteApiPaths, options?: any) {
+      return mockDataApiService.put(path, options)
+    }
+
+    async patch(path: ConcreteApiPaths, options?: any) {
+      return mockDataApiService.patch(path, options)
+    }
+
+    async delete(path: ConcreteApiPaths, options?: any) {
+      return mockDataApiService.delete(path, options)
+    }
+
+    async batch(requests: BatchRequest[]) {
+      return mockDataApiService.batch(requests)
+    }
+
+    async transaction(operations: TransactionRequest[]) {
+      return mockDataApiService.transaction(operations)
+    }
+
+    subscribe(path: ConcreteApiPaths, callback: SubscriptionCallback, options?: SubscriptionOptions) {
+      return mockDataApiService.subscribe(path, callback, options)
+    }
+
+    unsubscribe(path: ConcreteApiPaths) {
+      return mockDataApiService.unsubscribe(path)
+    }
+
+    async connect() {
+      return mockDataApiService.connect()
+    }
+
+    async disconnect() {
+      return mockDataApiService.disconnect()
+    }
+
+    async ping() {
+      return mockDataApiService.ping()
+    }
+  },
+  dataApiService: mockDataApiService
+}
+
+/**
+ * Utility functions for testing
+ */
+export const MockDataApiUtils = {
+  /**
+   * Reset all mock function call counts and implementations
+   */
+  resetMocks: () => {
+    Object.values(mockDataApiService).forEach(method => {
+      if (vi.isMockFunction(method)) {
+        method.mockClear()
+      }
+    })
+  },
+
+  /**
+   * Set custom response for a specific path and method
+   */
+  setCustomResponse: (path: ConcreteApiPaths, method: string, response: any) => {
+    const methodFn = mockDataApiService[method.toLowerCase() as keyof ApiClient] as any
+    if (vi.isMockFunction(methodFn)) {
+      methodFn.mockImplementation(async (requestPath: string, options?: any) => {
+        if (requestPath === path) {
+          return createMockResponse(response)
+        }
+        // Fall back to default behavior
+        return createMockResponse(getMockDataForPath(requestPath as ConcreteApiPaths, method))
+      })
+    }
+  },
+
+  /**
+   * Set error response for a specific path and method
+   */
+  setErrorResponse: (path: ConcreteApiPaths, method: string, errorMessage: string) => {
+    const methodFn = mockDataApiService[method.toLowerCase() as keyof ApiClient] as any
+    if (vi.isMockFunction(methodFn)) {
+      methodFn.mockImplementation(async (requestPath: string, options?: any) => {
+        if (requestPath === path) {
+          return createMockError(errorMessage)
+        }
+        // Fall back to default behavior
+        return createMockResponse(getMockDataForPath(requestPath as ConcreteApiPaths, method))
+      })
+    }
+  },
+
+  /**
+   * Get call count for a specific method
+   */
+  getCallCount: (method: keyof ApiClient): number => {
+    const methodFn = mockDataApiService[method] as any
+    return vi.isMockFunction(methodFn) ? methodFn.mock.calls.length : 0
+  },
+
+  /**
+   * Get calls for a specific method
+   */
+  getCalls: (method: keyof ApiClient): any[] => {
+    const methodFn = mockDataApiService[method] as any
+    return vi.isMockFunction(methodFn) ? methodFn.mock.calls : []
+  }
+}

tests/__mocks__/renderer/PreferenceService.ts

@@ -0,0 +1,98 @@
+import { vi } from 'vitest'
+
+/**
+ * Mock PreferenceService for testing
+ * Provides common preference defaults used across the application
+ */
+
+// Default preference values used in tests
+export const mockPreferenceDefaults: Record<string, any> = {
+  // Export preferences
+  'data.export.markdown.force_dollar_math': false,
+  'data.export.markdown.exclude_citations': false,
+  'data.export.markdown.standardize_citations': true,
+  'data.export.markdown.show_model_name': false,
+  'data.export.markdown.show_model_provider': false,
+
+  // UI preferences
+  'ui.language': 'zh-CN',
+  'ui.theme': 'light',
+  'ui.font_size': 14,
+
+  // AI preferences
+  'ai.default_model': 'gpt-4',
+  'ai.temperature': 0.7,
+  'ai.max_tokens': 2000,
+
+  // Feature flags
+  'feature.web_search': true,
+  'feature.reasoning': false,
+  'feature.tool_calling': true,
+
+  // User preferences
+  'user.name': 'MockUser',
+
+  // App preferences
+  'app.user.name': 'MockUser',
+  'app.language': 'zh-CN',
+
+  // Add more defaults as needed
+}
+
+/**
+ * Mock implementation of PreferenceService
+ */
+export const createMockPreferenceService = (customDefaults: Record<string, any> = {}) => {
+  const mergedDefaults = { ...mockPreferenceDefaults, ...customDefaults }
+
+  return {
+    get: vi.fn((key: string) => {
+      const value = mergedDefaults[key]
+      return Promise.resolve(value !== undefined ? value : null)
+    }),
+
+    getMultiple: vi.fn((keys: Record<string, string>) => {
+      const result: Record<string, any> = {}
+      Object.entries(keys).forEach(([alias, key]) => {
+        const value = mergedDefaults[key]
+        result[alias] = value !== undefined ? value : null
+      })
+      return Promise.resolve(result)
+    }),
+
+    set: vi.fn((key: string, value: any) => {
+      mergedDefaults[key] = value
+      return Promise.resolve()
+    }),
+
+    setMultiple: vi.fn((values: Record<string, any>) => {
+      Object.assign(mergedDefaults, values)
+      return Promise.resolve()
+    }),
+
+    delete: vi.fn((key: string) => {
+      delete mergedDefaults[key]
+      return Promise.resolve()
+    }),
+
+    clear: vi.fn(() => {
+      Object.keys(mergedDefaults).forEach(key => delete mergedDefaults[key])
+      return Promise.resolve()
+    }),
+
+    // Internal state access for testing
+    _getMockState: () => ({ ...mergedDefaults }),
+    _resetMockState: () => {
+      Object.keys(mergedDefaults).forEach(key => delete mergedDefaults[key])
+      Object.assign(mergedDefaults, mockPreferenceDefaults, customDefaults)
+    }
+  }
+}
+
+// Default mock instance
+export const mockPreferenceService = createMockPreferenceService()
+
+// Export for easy mocking in individual tests
+export const MockPreferenceService = {
+  preferenceService: mockPreferenceService
+}

tests/__mocks__/renderer/useCache.ts

@@ -0,0 +1,428 @@
+import type {
+  RendererPersistCacheKey,
+  RendererPersistCacheSchema,
+  UseCacheKey,
+  UseCacheSchema,
+  UseSharedCacheKey,
+  UseSharedCacheSchema
+} from '@shared/data/cache/cacheSchemas'
+import { DefaultRendererPersistCache, DefaultUseCache, DefaultUseSharedCache } from '@shared/data/cache/cacheSchemas'
+import { vi } from 'vitest'
+
+/**
+ * Mock useCache hooks for testing
+ * Provides comprehensive mocks for all cache management hooks
+ */
+
+// Mock cache state storage
+const mockMemoryCache = new Map<UseCacheKey, any>()
+const mockSharedCache = new Map<UseSharedCacheKey, any>()
+const mockPersistCache = new Map<RendererPersistCacheKey, any>()
+
+// Initialize caches with defaults
+Object.entries(DefaultUseCache).forEach(([key, value]) => {
+  mockMemoryCache.set(key as UseCacheKey, value)
+})
+
+Object.entries(DefaultUseSharedCache).forEach(([key, value]) => {
+  mockSharedCache.set(key as UseSharedCacheKey, value)
+})
+
+Object.entries(DefaultRendererPersistCache).forEach(([key, value]) => {
+  mockPersistCache.set(key as RendererPersistCacheKey, value)
+})
+
+// Mock subscribers for cache changes
+const mockMemorySubscribers = new Map<UseCacheKey, Set<() => void>>()
+const mockSharedSubscribers = new Map<UseSharedCacheKey, Set<() => void>>()
+const mockPersistSubscribers = new Map<RendererPersistCacheKey, Set<() => void>>()
+
+// Helper functions to notify subscribers
+const notifyMemorySubscribers = (key: UseCacheKey) => {
+  const subscribers = mockMemorySubscribers.get(key)
+  if (subscribers) {
+    subscribers.forEach(callback => {
+      try {
+        callback()
+      } catch (error) {
+        console.warn('Mock useCache: Memory subscriber callback error:', error)
+      }
+    })
+  }
+}
+
+const notifySharedSubscribers = (key: UseSharedCacheKey) => {
+  const subscribers = mockSharedSubscribers.get(key)
+  if (subscribers) {
+    subscribers.forEach(callback => {
+      try {
+        callback()
+      } catch (error) {
+        console.warn('Mock useCache: Shared subscriber callback error:', error)
+      }
+    })
+  }
+}
+
+const notifyPersistSubscribers = (key: RendererPersistCacheKey) => {
+  const subscribers = mockPersistSubscribers.get(key)
+  if (subscribers) {
+    subscribers.forEach(callback => {
+      try {
+        callback()
+      } catch (error) {
+        console.warn('Mock useCache: Persist subscriber callback error:', error)
+      }
+    })
+  }
+}
+
+/**
+ * Mock useCache hook (memory cache)
+ */
+export const mockUseCache = vi.fn(<K extends UseCacheKey>(
+  key: K,
+  initValue?: UseCacheSchema[K]
+): [UseCacheSchema[K], (value: UseCacheSchema[K]) => void] => {
+  // Get current value
+  let currentValue = mockMemoryCache.get(key)
+  if (currentValue === undefined) {
+    currentValue = initValue ?? DefaultUseCache[key]
+    if (currentValue !== undefined) {
+      mockMemoryCache.set(key, currentValue)
+    }
+  }
+
+  // Mock setValue function
+  const setValue = vi.fn((value: UseCacheSchema[K]) => {
+    mockMemoryCache.set(key, value)
+    notifyMemorySubscribers(key)
+  })
+
+  return [currentValue, setValue]
+})
+
+/**
+ * Mock useSharedCache hook (shared cache)
+ */
+export const mockUseSharedCache = vi.fn(<K extends UseSharedCacheKey>(
+  key: K,
+  initValue?: UseSharedCacheSchema[K]
+): [UseSharedCacheSchema[K], (value: UseSharedCacheSchema[K]) => void] => {
+  // Get current value
+  let currentValue = mockSharedCache.get(key)
+  if (currentValue === undefined) {
+    currentValue = initValue ?? DefaultUseSharedCache[key]
+    if (currentValue !== undefined) {
+      mockSharedCache.set(key, currentValue)
+    }
+  }
+
+  // Mock setValue function
+  const setValue = vi.fn((value: UseSharedCacheSchema[K]) => {
+    mockSharedCache.set(key, value)
+    notifySharedSubscribers(key)
+  })
+
+  return [currentValue, setValue]
+})
+
+/**
+ * Mock usePersistCache hook (persistent cache)
+ */
+export const mockUsePersistCache = vi.fn(<K extends RendererPersistCacheKey>(
+  key: K,
+  initValue?: RendererPersistCacheSchema[K]
+): [RendererPersistCacheSchema[K], (value: RendererPersistCacheSchema[K]) => void] => {
+  // Get current value
+  let currentValue = mockPersistCache.get(key)
+  if (currentValue === undefined) {
+    currentValue = initValue ?? DefaultRendererPersistCache[key]
+    if (currentValue !== undefined) {
+      mockPersistCache.set(key, currentValue)
+    }
+  }
+
+  // Mock setValue function
+  const setValue = vi.fn((value: RendererPersistCacheSchema[K]) => {
+    mockPersistCache.set(key, value)
+    notifyPersistSubscribers(key)
+  })
+
+  return [currentValue, setValue]
+})
+
+/**
+ * Export all mocks as a unified module
+ */
+export const MockUseCache = {
+  useCache: mockUseCache,
+  useSharedCache: mockUseSharedCache,
+  usePersistCache: mockUsePersistCache
+}
+
+/**
+ * Utility functions for testing
+ */
+export const MockUseCacheUtils = {
+  /**
+   * Reset all hook mock call counts and state
+   */
+  resetMocks: () => {
+    mockUseCache.mockClear()
+    mockUseSharedCache.mockClear()
+    mockUsePersistCache.mockClear()
+
+    // Reset caches to defaults
+    mockMemoryCache.clear()
+    mockSharedCache.clear()
+    mockPersistCache.clear()
+
+    Object.entries(DefaultUseCache).forEach(([key, value]) => {
+      mockMemoryCache.set(key as UseCacheKey, value)
+    })
+
+    Object.entries(DefaultUseSharedCache).forEach(([key, value]) => {
+      mockSharedCache.set(key as UseSharedCacheKey, value)
+    })
+
+    Object.entries(DefaultRendererPersistCache).forEach(([key, value]) => {
+      mockPersistCache.set(key as RendererPersistCacheKey, value)
+    })
+
+    // Clear subscribers
+    mockMemorySubscribers.clear()
+    mockSharedSubscribers.clear()
+    mockPersistSubscribers.clear()
+  },
+
+  /**
+   * Set cache value for testing (memory cache)
+   */
+  setCacheValue: <K extends UseCacheKey>(key: K, value: UseCacheSchema[K]) => {
+    mockMemoryCache.set(key, value)
+    notifyMemorySubscribers(key)
+  },
+
+  /**
+   * Get cache value (memory cache)
+   */
+  getCacheValue: <K extends UseCacheKey>(key: K): UseCacheSchema[K] => {
+    return mockMemoryCache.get(key) ?? DefaultUseCache[key]
+  },
+
+  /**
+   * Set shared cache value for testing
+   */
+  setSharedCacheValue: <K extends UseSharedCacheKey>(key: K, value: UseSharedCacheSchema[K]) => {
+    mockSharedCache.set(key, value)
+    notifySharedSubscribers(key)
+  },
+
+  /**
+   * Get shared cache value
+   */
+  getSharedCacheValue: <K extends UseSharedCacheKey>(key: K): UseSharedCacheSchema[K] => {
+    return mockSharedCache.get(key) ?? DefaultUseSharedCache[key]
+  },
+
+  /**
+   * Set persist cache value for testing
+   */
+  setPersistCacheValue: <K extends RendererPersistCacheKey>(key: K, value: RendererPersistCacheSchema[K]) => {
+    mockPersistCache.set(key, value)
+    notifyPersistSubscribers(key)
+  },
+
+  /**
+   * Get persist cache value
+   */
+  getPersistCacheValue: <K extends RendererPersistCacheKey>(key: K): RendererPersistCacheSchema[K] => {
+    return mockPersistCache.get(key) ?? DefaultRendererPersistCache[key]
+  },
+
+  /**
+   * Set multiple cache values at once
+   */
+  setMultipleCacheValues: (values: {
+    memory?: Array<[UseCacheKey, any]>
+    shared?: Array<[UseSharedCacheKey, any]>
+    persist?: Array<[RendererPersistCacheKey, any]>
+  }) => {
+    values.memory?.forEach(([key, value]) => {
+      mockMemoryCache.set(key, value)
+      notifyMemorySubscribers(key)
+    })
+
+    values.shared?.forEach(([key, value]) => {
+      mockSharedCache.set(key, value)
+      notifySharedSubscribers(key)
+    })
+
+    values.persist?.forEach(([key, value]) => {
+      mockPersistCache.set(key, value)
+      notifyPersistSubscribers(key)
+    })
+  },
+
+  /**
+   * Get all cache values
+   */
+  getAllCacheValues: () => ({
+    memory: Object.fromEntries(mockMemoryCache.entries()),
+    shared: Object.fromEntries(mockSharedCache.entries()),
+    persist: Object.fromEntries(mockPersistCache.entries())
+  }),
+
+  /**
+   * Simulate cache change from external source
+   */
+  simulateExternalCacheChange: <K extends UseCacheKey>(key: K, value: UseCacheSchema[K]) => {
+    mockMemoryCache.set(key, value)
+    notifyMemorySubscribers(key)
+  },
+
+  /**
+   * Mock cache hook to return specific value for a key
+   */
+  mockCacheReturn: <K extends UseCacheKey>(
+    key: K,
+    value: UseCacheSchema[K],
+    setValue?: (value: UseCacheSchema[K]) => void
+  ) => {
+    mockUseCache.mockImplementation((cacheKey, initValue) => {
+      if (cacheKey === key) {
+        return [
+          value,
+          setValue || vi.fn()
+        ]
+      }
+
+      // Default behavior for other keys
+      const defaultValue = mockMemoryCache.get(cacheKey) ?? initValue ?? DefaultUseCache[cacheKey]
+      return [
+        defaultValue,
+        vi.fn()
+      ]
+    })
+  },
+
+  /**
+   * Mock shared cache hook to return specific value for a key
+   */
+  mockSharedCacheReturn: <K extends UseSharedCacheKey>(
+    key: K,
+    value: UseSharedCacheSchema[K],
+    setValue?: (value: UseSharedCacheSchema[K]) => void
+  ) => {
+    mockUseSharedCache.mockImplementation((cacheKey, initValue) => {
+      if (cacheKey === key) {
+        return [
+          value,
+          setValue || vi.fn()
+        ]
+      }
+
+      // Default behavior for other keys
+      const defaultValue = mockSharedCache.get(cacheKey) ?? initValue ?? DefaultUseSharedCache[cacheKey]
+      return [
+        defaultValue,
+        vi.fn()
+      ]
+    })
+  },
+
+  /**
+   * Mock persist cache hook to return specific value for a key
+   */
+  mockPersistCacheReturn: <K extends RendererPersistCacheKey>(
+    key: K,
+    value: RendererPersistCacheSchema[K],
+    setValue?: (value: RendererPersistCacheSchema[K]) => void
+  ) => {
+    mockUsePersistCache.mockImplementation((cacheKey, initValue) => {
+      if (cacheKey === key) {
+        return [
+          value,
+          setValue || vi.fn()
+        ]
+      }
+
+      // Default behavior for other keys
+      const defaultValue = mockPersistCache.get(cacheKey) ?? initValue ?? DefaultRendererPersistCache[cacheKey]
+      return [
+        defaultValue,
+        vi.fn()
+      ]
+    })
+  },
+
+  /**
+   * Add subscriber for cache changes (for testing subscription behavior)
+   */
+  addMemorySubscriber: (key: UseCacheKey, callback: () => void): (() => void) => {
+    if (!mockMemorySubscribers.has(key)) {
+      mockMemorySubscribers.set(key, new Set())
+    }
+    mockMemorySubscribers.get(key)!.add(callback)
+
+    return () => {
+      const subscribers = mockMemorySubscribers.get(key)
+      if (subscribers) {
+        subscribers.delete(callback)
+        if (subscribers.size === 0) {
+          mockMemorySubscribers.delete(key)
+        }
+      }
+    }
+  },
+
+  /**
+   * Add subscriber for shared cache changes
+   */
+  addSharedSubscriber: (key: UseSharedCacheKey, callback: () => void): (() => void) => {
+    if (!mockSharedSubscribers.has(key)) {
+      mockSharedSubscribers.set(key, new Set())
+    }
+    mockSharedSubscribers.get(key)!.add(callback)
+
+    return () => {
+      const subscribers = mockSharedSubscribers.get(key)
+      if (subscribers) {
+        subscribers.delete(callback)
+        if (subscribers.size === 0) {
+          mockSharedSubscribers.delete(key)
+        }
+      }
+    }
+  },
+
+  /**
+   * Add subscriber for persist cache changes
+   */
+  addPersistSubscriber: (key: RendererPersistCacheKey, callback: () => void): (() => void) => {
+    if (!mockPersistSubscribers.has(key)) {
+      mockPersistSubscribers.set(key, new Set())
+    }
+    mockPersistSubscribers.get(key)!.add(callback)
+
+    return () => {
+      const subscribers = mockPersistSubscribers.get(key)
+      if (subscribers) {
+        subscribers.delete(callback)
+        if (subscribers.size === 0) {
+          mockPersistSubscribers.delete(key)
+        }
+      }
+    }
+  },
+
+  /**
+   * Get subscriber counts for debugging
+   */
+  getSubscriberCounts: () => ({
+    memory: Array.from(mockMemorySubscribers.entries()).map(([key, subs]) => [key, subs.size]),
+    shared: Array.from(mockSharedSubscribers.entries()).map(([key, subs]) => [key, subs.size]),
+    persist: Array.from(mockPersistSubscribers.entries()).map(([key, subs]) => [key, subs.size])
+  })
+}

tests/__mocks__/renderer/useDataApi.ts

@@ -0,0 +1,369 @@
+import type { ConcreteApiPaths } from '@shared/data/api/apiSchemas'
+import type { PaginatedResponse } from '@shared/data/api/apiTypes'
+import { vi } from 'vitest'
+
+/**
+ * Mock useDataApi hooks for testing
+ * Provides comprehensive mocks for all data API hooks with realistic SWR-like behavior
+ */
+
+// Mock SWR response interface
+interface MockSWRResponse<T> {
+  data?: T
+  error?: Error
+  isLoading: boolean
+  isValidating: boolean
+  mutate: (data?: T | Promise<T> | ((data: T) => T)) => Promise<T | undefined>
+}
+
+// Mock mutation response interface
+interface MockMutationResponse<T> {
+  data?: T
+  error?: Error
+  isMutating: boolean
+  trigger: (...args: any[]) => Promise<T>
+  reset: () => void
+}
+
+// Mock paginated response interface
+interface MockPaginatedResponse<T> extends MockSWRResponse<PaginatedResponse<T>> {
+  loadMore: () => void
+  isLoadingMore: boolean
+  hasMore: boolean
+  items: T[]
+}
+
+/**
+ * Create mock data based on API path
+ */
+function createMockDataForPath(path: ConcreteApiPaths): any {
+  if (path.includes('/topics')) {
+    if (path.endsWith('/topics')) {
+      return {
+        topics: [
+          { id: 'topic1', name: 'Mock Topic 1', createdAt: '2024-01-01T00:00:00Z' },
+          { id: 'topic2', name: 'Mock Topic 2', createdAt: '2024-01-02T00:00:00Z' }
+        ],
+        total: 2
+      }
+    }
+    return {
+      id: 'topic1',
+      name: 'Mock Topic',
+      messages: [],
+      createdAt: '2024-01-01T00:00:00Z'
+    }
+  }
+
+  if (path.includes('/messages')) {
+    return {
+      messages: [
+        { id: 'msg1', content: 'Mock message 1', role: 'user' },
+        { id: 'msg2', content: 'Mock message 2', role: 'assistant' }
+      ],
+      total: 2
+    }
+  }
+
+  return { id: 'mock_id', data: 'mock_data' }
+}
+
+/**
+ * Mock useQuery hook
+ */
+export const mockUseQuery = vi.fn(<TPath extends ConcreteApiPaths>(
+  path: TPath | null,
+  query?: any,
+  options?: any
+): MockSWRResponse<any> => {
+  const isLoading = options?.initialLoading ?? false
+  const hasError = options?.shouldError ?? false
+
+  if (hasError) {
+    return {
+      data: undefined,
+      error: new Error(`Mock error for ${path}`),
+      isLoading: false,
+      isValidating: false,
+      mutate: vi.fn().mockResolvedValue(undefined)
+    }
+  }
+
+  const mockData = path ? createMockDataForPath(path) : undefined
+
+  return {
+    data: mockData,
+    error: undefined,
+    isLoading,
+    isValidating: false,
+    mutate: vi.fn().mockResolvedValue(mockData)
+  }
+})
+
+/**
+ * Mock useMutation hook
+ */
+export const mockUseMutation = vi.fn(<TPath extends ConcreteApiPaths, TMethod extends 'POST' | 'PUT' | 'DELETE' | 'PATCH'>(
+  path: TPath,
+  method: TMethod,
+  options?: any
+): MockMutationResponse<any> => {
+  const isMutating = options?.initialMutating ?? false
+  const hasError = options?.shouldError ?? false
+
+  const mockTrigger = vi.fn(async (...args: any[]) => {
+    if (hasError) {
+      throw new Error(`Mock mutation error for ${method} ${path}`)
+    }
+
+    // Simulate different responses based on method
+    switch (method) {
+      case 'POST':
+        return { id: 'new_item', created: true, ...args[0] }
+      case 'PUT':
+      case 'PATCH':
+        return { id: 'updated_item', updated: true, ...args[0] }
+      case 'DELETE':
+        return { deleted: true }
+      default:
+        return { success: true }
+    }
+  })
+
+  return {
+    data: undefined,
+    error: undefined,
+    isMutating,
+    trigger: mockTrigger,
+    reset: vi.fn()
+  }
+})
+
+/**
+ * Mock usePaginatedQuery hook
+ */
+export const mockUsePaginatedQuery = vi.fn(<TPath extends ConcreteApiPaths>(
+  path: TPath | null,
+  query?: any,
+  options?: any
+): MockPaginatedResponse<any> => {
+  const isLoading = options?.initialLoading ?? false
+  const isLoadingMore = options?.initialLoadingMore ?? false
+  const hasError = options?.shouldError ?? false
+
+  if (hasError) {
+    return {
+      data: undefined,
+      error: new Error(`Mock paginated error for ${path}`),
+      isLoading: false,
+      isValidating: false,
+      mutate: vi.fn().mockResolvedValue(undefined),
+      loadMore: vi.fn(),
+      isLoadingMore: false,
+      hasMore: false,
+      items: []
+    }
+  }
+
+  const mockItems = path ? [
+    { id: 'item1', name: 'Mock Item 1' },
+    { id: 'item2', name: 'Mock Item 2' },
+    { id: 'item3', name: 'Mock Item 3' }
+  ] : []
+
+  const mockData: PaginatedResponse<any> = {
+    items: mockItems,
+    total: mockItems.length,
+    page: 1,
+    pageSize: 10,
+    hasMore: false
+  }
+
+  return {
+    data: mockData,
+    error: undefined,
+    isLoading,
+    isValidating: false,
+    mutate: vi.fn().mockResolvedValue(mockData),
+    loadMore: vi.fn(),
+    isLoadingMore,
+    hasMore: mockData.hasMore,
+    items: mockItems
+  }
+})
+
+/**
+ * Mock useInvalidateCache hook
+ */
+export const mockUseInvalidateCache = vi.fn(() => {
+  return {
+    invalidate: vi.fn(async (path?: ConcreteApiPaths) => {
+      // Mock cache invalidation
+      return Promise.resolve()
+    }),
+    invalidateAll: vi.fn(async () => {
+      // Mock invalidate all caches
+      return Promise.resolve()
+    })
+  }
+})
+
+/**
+ * Mock prefetch function
+ */
+export const mockPrefetch = vi.fn(async <TPath extends ConcreteApiPaths>(
+  path: TPath,
+  query?: any,
+  options?: any
+): Promise<any> => {
+  // Mock prefetch - return mock data
+  return createMockDataForPath(path)
+})
+
+/**
+ * Export all mocks as a unified module
+ */
+export const MockUseDataApi = {
+  useQuery: mockUseQuery,
+  useMutation: mockUseMutation,
+  usePaginatedQuery: mockUsePaginatedQuery,
+  useInvalidateCache: mockUseInvalidateCache,
+  prefetch: mockPrefetch
+}
+
+/**
+ * Utility functions for testing
+ */
+export const MockUseDataApiUtils = {
+  /**
+   * Reset all hook mock call counts and implementations
+   */
+  resetMocks: () => {
+    mockUseQuery.mockClear()
+    mockUseMutation.mockClear()
+    mockUsePaginatedQuery.mockClear()
+    mockUseInvalidateCache.mockClear()
+    mockPrefetch.mockClear()
+  },
+
+  /**
+   * Set up useQuery to return specific data
+   */
+  mockQueryData: <T>(path: ConcreteApiPaths, data: T) => {
+    mockUseQuery.mockImplementation((queryPath, query, options) => {
+      if (queryPath === path) {
+        return {
+          data,
+          error: undefined,
+          isLoading: false,
+          isValidating: false,
+          mutate: vi.fn().mockResolvedValue(data)
+        }
+      }
+      // Default behavior for other paths
+      return mockUseQuery.getMockImplementation()?.(queryPath, query, options) || {
+        data: undefined,
+        error: undefined,
+        isLoading: false,
+        isValidating: false,
+        mutate: vi.fn().mockResolvedValue(undefined)
+      }
+    })
+  },
+
+  /**
+   * Set up useQuery to return loading state
+   */
+  mockQueryLoading: (path: ConcreteApiPaths) => {
+    mockUseQuery.mockImplementation((queryPath, query, options) => {
+      if (queryPath === path) {
+        return {
+          data: undefined,
+          error: undefined,
+          isLoading: true,
+          isValidating: true,
+          mutate: vi.fn().mockResolvedValue(undefined)
+        }
+      }
+      return mockUseQuery.getMockImplementation()?.(queryPath, query, options) || {
+        data: undefined,
+        error: undefined,
+        isLoading: false,
+        isValidating: false,
+        mutate: vi.fn().mockResolvedValue(undefined)
+      }
+    })
+  },
+
+  /**
+   * Set up useQuery to return error state
+   */
+  mockQueryError: (path: ConcreteApiPaths, error: Error) => {
+    mockUseQuery.mockImplementation((queryPath, query, options) => {
+      if (queryPath === path) {
+        return {
+          data: undefined,
+          error,
+          isLoading: false,
+          isValidating: false,
+          mutate: vi.fn().mockResolvedValue(undefined)
+        }
+      }
+      return mockUseQuery.getMockImplementation()?.(queryPath, query, options) || {
+        data: undefined,
+        error: undefined,
+        isLoading: false,
+        isValidating: false,
+        mutate: vi.fn().mockResolvedValue(undefined)
+      }
+    })
+  },
+
+  /**
+   * Set up useMutation to simulate success
+   */
+  mockMutationSuccess: <T>(path: ConcreteApiPaths, method: string, result: T) => {
+    mockUseMutation.mockImplementation((mutationPath, mutationMethod, options) => {
+      if (mutationPath === path && mutationMethod === method) {
+        return {
+          data: undefined,
+          error: undefined,
+          isMutating: false,
+          trigger: vi.fn().mockResolvedValue(result),
+          reset: vi.fn()
+        }
+      }
+      return mockUseMutation.getMockImplementation()?.(mutationPath, mutationMethod, options) || {
+        data: undefined,
+        error: undefined,
+        isMutating: false,
+        trigger: vi.fn().mockResolvedValue({}),
+        reset: vi.fn()
+      }
+    })
+  },
+
+  /**
+   * Set up useMutation to simulate error
+   */
+  mockMutationError: (path: ConcreteApiPaths, method: string, error: Error) => {
+    mockUseMutation.mockImplementation((mutationPath, mutationMethod, options) => {
+      if (mutationPath === path && mutationMethod === method) {
+        return {
+          data: undefined,
+          error: undefined,
+          isMutating: false,
+          trigger: vi.fn().mockRejectedValue(error),
+          reset: vi.fn()
+        }
+      }
+      return mockUseMutation.getMockImplementation()?.(mutationPath, mutationMethod, options) || {
+        data: undefined,
+        error: undefined,
+        isMutating: false,
+        trigger: vi.fn().mockResolvedValue({}),
+        reset: vi.fn()
+      }
+    })
+  }
+}

tests/__mocks__/renderer/usePreference.ts

@@ -0,0 +1,296 @@
+import type {
+  PreferenceKeyType,
+  PreferenceUpdateOptions,
+  PreferenceValueType
+} from '@shared/data/preference/preferenceTypes'
+import { vi } from 'vitest'
+
+import { mockPreferenceDefaults } from './PreferenceService'
+
+/**
+ * Mock usePreference hooks for testing
+ * Provides comprehensive mocks for preference management hooks
+ */
+
+// Mock preference state storage
+const mockPreferenceState = new Map<PreferenceKeyType, any>()
+
+// Initialize with defaults
+Object.entries(mockPreferenceDefaults).forEach(([key, value]) => {
+  mockPreferenceState.set(key as PreferenceKeyType, value)
+})
+
+// Mock subscribers for preference changes
+const mockPreferenceSubscribers = new Map<PreferenceKeyType, Set<() => void>>()
+
+// Helper function to notify subscribers
+const notifyPreferenceSubscribers = (key: PreferenceKeyType) => {
+  const subscribers = mockPreferenceSubscribers.get(key)
+  if (subscribers) {
+    subscribers.forEach(callback => {
+      try {
+        callback()
+      } catch (error) {
+        console.warn('Mock usePreference: Subscriber callback error:', error)
+      }
+    })
+  }
+}
+
+/**
+ * Mock usePreference hook
+ */
+export const mockUsePreference = vi.fn(<K extends PreferenceKeyType>(
+  key: K,
+  options?: PreferenceUpdateOptions
+): [PreferenceValueType<K>, (value: PreferenceValueType<K>) => Promise<void>] => {
+  // Get current value
+  const currentValue = mockPreferenceState.get(key) ?? mockPreferenceDefaults[key] ?? null
+
+  // Mock setValue function
+  const setValue = vi.fn(async (value: PreferenceValueType<K>) => {
+    const oldValue = mockPreferenceState.get(key)
+
+    // Simulate optimistic updates (default behavior)
+    if (options?.optimistic !== false) {
+      mockPreferenceState.set(key, value)
+      notifyPreferenceSubscribers(key)
+    }
+
+    // Simulate async update delay
+    await new Promise(resolve => setTimeout(resolve, 10))
+
+    // For pessimistic updates, update after delay
+    if (options?.optimistic === false) {
+      mockPreferenceState.set(key, value)
+      notifyPreferenceSubscribers(key)
+    }
+
+    // Simulate error scenarios if configured
+    if (options?.shouldError) {
+      // Rollback optimistic update on error
+      if (options.optimistic !== false) {
+        mockPreferenceState.set(key, oldValue)
+        notifyPreferenceSubscribers(key)
+      }
+      throw new Error(`Mock preference error for key: ${key}`)
+    }
+  })
+
+  return [currentValue, setValue]
+})
+
+/**
+ * Mock useMultiplePreferences hook
+ */
+export const mockUseMultiplePreferences = vi.fn(<T extends Record<string, PreferenceKeyType>>(
+  keys: T,
+  options?: PreferenceUpdateOptions
+): [
+  { [K in keyof T]: PreferenceValueType<T[K]> },
+  (values: Partial<{ [K in keyof T]: PreferenceValueType<T[K]> }>) => Promise<void>
+] => {
+  // Get current values for all keys
+  const currentValues = {} as { [K in keyof T]: PreferenceValueType<T[K]> }
+  Object.entries(keys).forEach(([alias, key]) => {
+    currentValues[alias as keyof T] = mockPreferenceState.get(key as PreferenceKeyType) ??
+      mockPreferenceDefaults[key as string] ?? null
+  })
+
+  // Mock setValues function
+  const setValues = vi.fn(async (values: Partial<{ [K in keyof T]: PreferenceValueType<T[K]> }>) => {
+    const oldValues = { ...currentValues }
+
+    // Simulate optimistic updates
+    if (options?.optimistic !== false) {
+      Object.entries(values).forEach(([alias, value]) => {
+        const key = keys[alias as keyof T] as PreferenceKeyType
+        if (value !== undefined) {
+          mockPreferenceState.set(key, value)
+          currentValues[alias as keyof T] = value as any
+          notifyPreferenceSubscribers(key)
+        }
+      })
+    }
+
+    // Simulate async update delay
+    await new Promise(resolve => setTimeout(resolve, 10))
+
+    // For pessimistic updates, update after delay
+    if (options?.optimistic === false) {
+      Object.entries(values).forEach(([alias, value]) => {
+        const key = keys[alias as keyof T] as PreferenceKeyType
+        if (value !== undefined) {
+          mockPreferenceState.set(key, value)
+          currentValues[alias as keyof T] = value as any
+          notifyPreferenceSubscribers(key)
+        }
+      })
+    }
+
+    // Simulate error scenarios
+    if (options?.shouldError) {
+      // Rollback optimistic updates on error
+      if (options.optimistic !== false) {
+        Object.entries(oldValues).forEach(([alias, value]) => {
+          const key = keys[alias as keyof T] as PreferenceKeyType
+          mockPreferenceState.set(key, value)
+          currentValues[alias as keyof T] = value
+          notifyPreferenceSubscribers(key)
+        })
+      }
+      throw new Error('Mock multiple preferences error')
+    }
+  })
+
+  return [currentValues, setValues]
+})
+
+/**
+ * Export all mocks as a unified module
+ */
+export const MockUsePreference = {
+  usePreference: mockUsePreference,
+  useMultiplePreferences: mockUseMultiplePreferences
+}
+
+/**
+ * Utility functions for testing
+ */
+export const MockUsePreferenceUtils = {
+  /**
+   * Reset all hook mock call counts and state
+   */
+  resetMocks: () => {
+    mockUsePreference.mockClear()
+    mockUseMultiplePreferences.mockClear()
+
+    // Reset state to defaults
+    mockPreferenceState.clear()
+    Object.entries(mockPreferenceDefaults).forEach(([key, value]) => {
+      mockPreferenceState.set(key as PreferenceKeyType, value)
+    })
+
+    // Clear subscribers
+    mockPreferenceSubscribers.clear()
+  },
+
+  /**
+   * Set a preference value for testing
+   */
+  setPreferenceValue: <K extends PreferenceKeyType>(key: K, value: PreferenceValueType<K>) => {
+    mockPreferenceState.set(key, value)
+    notifyPreferenceSubscribers(key)
+  },
+
+  /**
+   * Get current preference value
+   */
+  getPreferenceValue: <K extends PreferenceKeyType>(key: K): PreferenceValueType<K> => {
+    return mockPreferenceState.get(key) ?? mockPreferenceDefaults[key] ?? null
+  },
+
+  /**
+   * Set multiple preference values for testing
+   */
+  setMultiplePreferenceValues: (values: Record<string, any>) => {
+    Object.entries(values).forEach(([key, value]) => {
+      mockPreferenceState.set(key as PreferenceKeyType, value)
+      notifyPreferenceSubscribers(key as PreferenceKeyType)
+    })
+  },
+
+  /**
+   * Get all current preference values
+   */
+  getAllPreferenceValues: (): Record<string, any> => {
+    const result: Record<string, any> = {}
+    mockPreferenceState.forEach((value, key) => {
+      result[key] = value
+    })
+    return result
+  },
+
+  /**
+   * Simulate preference change from external source
+   */
+  simulateExternalPreferenceChange: <K extends PreferenceKeyType>(key: K, value: PreferenceValueType<K>) => {
+    mockPreferenceState.set(key, value)
+    notifyPreferenceSubscribers(key)
+  },
+
+  /**
+   * Mock preference hook to return specific value for a key
+   */
+  mockPreferenceReturn: <K extends PreferenceKeyType>(
+    key: K,
+    value: PreferenceValueType<K>,
+    setValue?: (value: PreferenceValueType<K>) => Promise<void>
+  ) => {
+    mockUsePreference.mockImplementation((preferenceKey, options) => {
+      if (preferenceKey === key) {
+        return [
+          value,
+          setValue || vi.fn().mockResolvedValue(undefined)
+        ]
+      }
+
+      // Default behavior for other keys
+      const defaultValue = mockPreferenceState.get(preferenceKey) ??
+        mockPreferenceDefaults[preferenceKey] ?? null
+      return [
+        defaultValue,
+        vi.fn().mockResolvedValue(undefined)
+      ]
+    })
+  },
+
+  /**
+   * Mock preference hook to simulate error for a key
+   */
+  mockPreferenceError: <K extends PreferenceKeyType>(key: K, error: Error) => {
+    mockUsePreference.mockImplementation((preferenceKey, options) => {
+      if (preferenceKey === key) {
+        const setValue = vi.fn().mockRejectedValue(error)
+        const currentValue = mockPreferenceState.get(key) ?? mockPreferenceDefaults[key] ?? null
+        return [currentValue, setValue]
+      }
+
+      // Default behavior for other keys
+      const defaultValue = mockPreferenceState.get(preferenceKey) ??
+        mockPreferenceDefaults[preferenceKey] ?? null
+      return [
+        defaultValue,
+        vi.fn().mockResolvedValue(undefined)
+      ]
+    })
+  },
+
+  /**
+   * Add subscriber for preference changes (for testing subscription behavior)
+   */
+  addSubscriber: (key: PreferenceKeyType, callback: () => void): (() => void) => {
+    if (!mockPreferenceSubscribers.has(key)) {
+      mockPreferenceSubscribers.set(key, new Set())
+    }
+    mockPreferenceSubscribers.get(key)!.add(callback)
+
+    // Return unsubscribe function
+    return () => {
+      const subscribers = mockPreferenceSubscribers.get(key)
+      if (subscribers) {
+        subscribers.delete(callback)
+        if (subscribers.size === 0) {
+          mockPreferenceSubscribers.delete(key)
+        }
+      }
+    }
+  },
+
+  /**
+   * Get subscriber count for a preference key
+   */
+  getSubscriberCount: (key: PreferenceKeyType): number => {
+    return mockPreferenceSubscribers.get(key)?.size ?? 0
+  }
+}

tests/main.setup.ts

@@ -9,6 +9,40 @@ vi.mock('@logger', async () => {
   }
 })
 
+// Mock PreferenceService globally for main tests
+vi.mock('@main/data/PreferenceService', async () => {
+  const { MockMainPreferenceServiceExport } = await import('./__mocks__/main/PreferenceService')
+  return MockMainPreferenceServiceExport
+})
+
+// Mock DataApiService globally for main tests
+vi.mock('@main/data/DataApiService', async () => {
+  const { MockMainDataApiServiceExport } = await import('./__mocks__/main/DataApiService')
+  return MockMainDataApiServiceExport
+})
+
+// Mock CacheService globally for main tests
+vi.mock('@main/data/CacheService', async () => {
+  const { MockMainCacheServiceExport } = await import('./__mocks__/main/CacheService')
+  return MockMainCacheServiceExport
+})
+
+// Mock DbService globally for main tests (if exists)
+vi.mock('@main/data/db/DbService', async () => {
+  try {
+    const { MockDbService } = await import('./__mocks__/DbService')
+    return MockDbService
+  } catch {
+    // Return basic mock if DbService mock doesn't exist yet
+    return {
+      dbService: {
+        initialize: vi.fn(),
+        getDb: vi.fn()
+      }
+    }
+  }
+})
+
 // Mock electron modules that are commonly used in main process
 vi.mock('electron', () => ({
   app: {

tests/renderer.setup.ts

@@ -14,6 +14,42 @@ vi.mock('@logger', async () => {
   }
 })
 
+// Mock PreferenceService globally for renderer tests
+vi.mock('@data/PreferenceService', async () => {
+  const { MockPreferenceService } = await import('./__mocks__/renderer/PreferenceService')
+  return MockPreferenceService
+})
+
+// Mock DataApiService globally for renderer tests
+vi.mock('@data/DataApiService', async () => {
+  const { MockDataApiService } = await import('./__mocks__/renderer/DataApiService')
+  return MockDataApiService
+})
+
+// Mock CacheService globally for renderer tests
+vi.mock('@data/CacheService', async () => {
+  const { MockCacheService } = await import('./__mocks__/renderer/CacheService')
+  return MockCacheService
+})
+
+// Mock useDataApi hooks globally for renderer tests
+vi.mock('@data/hooks/useDataApi', async () => {
+  const { MockUseDataApi } = await import('./__mocks__/renderer/useDataApi')
+  return MockUseDataApi
+})
+
+// Mock usePreference hooks globally for renderer tests
+vi.mock('@data/hooks/usePreference', async () => {
+  const { MockUsePreference } = await import('./__mocks__/renderer/usePreference')
+  return MockUsePreference
+})
+
+// Mock useCache hooks globally for renderer tests
+vi.mock('@data/hooks/useCache', async () => {
+  const { MockUseCache } = await import('./__mocks__/renderer/useCache')
+  return MockUseCache
+})
+
 vi.mock('axios', () => ({
   default: {
     get: vi.fn().mockResolvedValue({ data: {} }), // Mocking axios GET request