Implement internationalization (i18n) system for LoRA Manager

- Added i18n support with automatic language detection based on browser settings. - Implemented translations for English (en) and Simplified Chinese (zh-CN). - Created utility functions for text replacement in HTML templates and JavaScript. - Developed a comprehensive translation key structure for various application components. - Added formatting functions for numbers, dates, and file sizes according to locale. - Included RTL language support and dynamic updates for DOM elements. - Created tests to verify the functionality of the i18n system.
2026-03-23 14:12:11 -03:00 · 2025-08-28 22:22:26 +08:00
parent 4246908f2e
commit f82908221c
18 changed files with 1786 additions and 121 deletions
--- a/docs/i18n-implementation-summary.md
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+# LoRA Manager i18n Implementation Summary
+
+## 📋 Overview
+
+Successfully implemented comprehensive internationalization (i18n) support for LoRA Manager UI with automatic browser language detection, supporting English and Simplified Chinese.
+
+## 🛠 Implementation Details
+
+### Core System Files
+
+1. **`static/js/i18n/index.js`** - Main i18n manager
+   - Automatic browser language detection
+   - Translation interpolation with parameters
+   - Locale-aware number, date, and file size formatting
+   - RTL language support framework
+
+2. **`static/js/i18n/locales/en.js`** - English translations
+   - Complete translation set for all UI elements
+   - Hierarchical key structure (common, header, loras, etc.)
+
+3. **`static/js/i18n/locales/zh-CN.js`** - Simplified Chinese translations
+   - Full Chinese translation coverage
+   - Cultural adaptation for UI elements
+
+4. **`static/js/utils/i18nHelpers.js`** - DOM helper utilities
+   - Automatic DOM text replacement with `data-i18n` attributes
+   - Dynamic search placeholder updates
+   - Bulk selection count updates
+   - Element creation helpers
+
+### Modified Files
+
+#### JavaScript Files (8 files modified)
+- `static/js/core.js` - Core app initialization with i18n
+- `static/js/components/Header.js` - Header component with i18n
+- `static/js/managers/BulkManager.js` - Bulk operations with i18n
+- `static/js/loras.js` - LoRA page initialization
+- `static/js/checkpoints.js` - Checkpoints page initialization  
+- `static/js/embeddings.js` - Embeddings page initialization
+- `static/js/recipes.js` - Recipes page initialization
+- `static/js/statistics.js` - Statistics page initialization
+
+#### HTML Template Files (3 files modified)
+- `templates/components/header.html` - Navigation and search elements
+- `templates/components/controls.html` - Page controls and bulk operations
+- `templates/components/context_menu.html` - Context menu items
+
+## 🌐 Language Support
+
+### Supported Languages
+- **English (en)** - Default language, comprehensive coverage
+- **Simplified Chinese (zh-CN)** - Complete translation with cultural adaptations
+- **Fallback Support** - Graceful fallback to English for missing translations
+
+### Browser Language Detection
+- Automatically detects browser language preference
+- Supports both `zh-CN` and `zh` language codes (both map to Simplified Chinese)
+- Falls back to English for unsupported languages
+
+## ✨ Features
+
+### Automatic Translation
+- HTML elements with `data-i18n` attributes are automatically translated
+- Support for different target attributes (textContent, placeholder, title, etc.)
+- Parameter interpolation for dynamic content
+
+### Formatting Functions
+- **File Size**: Locale-aware file size formatting (e.g., "1 MB" / "1 兆字节")
+- **Numbers**: Decimal formatting according to locale standards
+- **Dates**: Locale-specific date formatting
+
+### Dynamic Updates
+- Search placeholders update based on current page
+- Bulk selection counts update dynamically
+- Theme toggle tooltips reflect current state
+
+## 🔧 Usage Examples
+
+### HTML Template Usage
+```html
+<!-- Basic text translation -->
+<span data-i18n="header.appTitle">LoRA Manager</span>
+
+<!-- Placeholder translation -->
+<input data-i18n="header.search.placeholder" data-i18n-target="placeholder" />
+
+<!-- Title attribute translation -->
+<button data-i18n="common.actions.refresh" data-i18n-target="title">
+```
+
+### JavaScript Usage
+```javascript
+import { t, formatFileSize, initializePageI18n } from './utils/i18nHelpers.js';
+
+// Basic translation
+const message = t('common.status.loading');
+
+// Translation with parameters
+const count = t('loras.bulkOperations.selected', { count: 5 });
+
+// Format file size
+const size = formatFileSize(1048576); // "1 MB" or "1 兆字节"
+
+// Initialize page translations
+initializePageI18n();
+```
+
+## 📁 File Structure
+
+```
+static/js/
+├── i18n/
+│   ├── index.js                 # Main i18n manager
+│   └── locales/
+│       ├── en.js                # English translations
+│       └── zh-CN.js             # Chinese translations
+├── utils/
+│   └── i18nHelpers.js           # DOM helper utilities
+├── test/
+│   └── i18nTest.js              # Test suite for i18n functionality
+└── [existing files modified...]
+
+docs/
+└── i18n.md                      # Comprehensive usage documentation
+```
+
+## 🧪 Testing
+
+### Test File
+- **`static/js/test/i18nTest.js`** - Comprehensive test suite
+  - Language detection testing
+  - Translation functionality testing
+  - DOM translation testing
+  - Formatting function testing
+
+### Manual Testing
+Add `?test=i18n` to any page URL to run automated tests in browser console.
+
+## 🔄 Integration Points
+
+### Core Integration
+- i18n system initializes in `core.js` before any UI components
+- Available globally as `window.i18n` for debugging and development
+- Each page calls `initializePageI18n()` after DOM setup
+
+### Component Integration
+- Header component updates search placeholders dynamically
+- Bulk manager uses i18n for selection count updates
+- Context menus and modals support localized text
+- All form controls include proper translations
+
+## 🚀 Next Steps for Extension
+
+### Adding New Languages
+1. Create new locale file in `static/js/i18n/locales/`
+2. Import and register in `static/js/i18n/index.js`
+3. Test with browser language simulation
+
+### RTL Language Support
+- Framework already includes RTL detection
+- CSS classes automatically applied for RTL languages
+- Ready for Arabic, Hebrew, or other RTL languages
+
+### Dynamic Language Switching
+- Core system supports runtime language changes
+- Could add language picker UI in settings
+- Would require `translateDOM()` re-execution
+
+## ✅ Quality Assurance
+
+### Code Quality
+- Comprehensive error handling with fallbacks
+- Consistent naming conventions
+- Well-documented API with JSDoc comments
+- Modular architecture for easy maintenance
+
+### User Experience
+- Seamless automatic language detection
+- No performance impact on page load
+- Graceful degradation if translations fail
+- Consistent UI behavior across languages
+
+### Maintainability
+- Clear separation of concerns
+- Hierarchical translation key structure
+- Comprehensive documentation
+- Test coverage for core functionality
+
+---
+
+**Implementation Status: ✅ Complete**
+
+The i18n system is fully implemented and ready for production use. All major UI components support both English and Simplified Chinese with automatic browser language detection.
--- a/docs/i18n.md
+++ b/docs/i18n.md
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+# LoRA Manager Internationalization (i18n)
+
+This document explains how to use the internationalization system in LoRA Manager.
+
+## Features
+
+- Automatic language detection based on browser language
+- Support for English (en) and Simplified Chinese (zh-CN)
+- Fallback to English if the browser language is not supported
+- Dynamic text replacement in HTML templates
+- Number, date, and file size formatting according to locale
+- Right-to-Left (RTL) language support (framework ready)
+
+## Browser Language Detection
+
+The system automatically detects the user's browser language using:
+1. `navigator.language` - Primary browser language
+2. `navigator.languages[0]` - First language in the user's preferred languages
+3. Fallback to 'en' if no supported language is found
+
+### Supported Language Codes
+
+- `en` - English (default)
+- `zh-CN` - Simplified Chinese
+- `zh` - Falls back to Simplified Chinese
+
+## Usage in HTML Templates
+
+### Basic Text Translation
+
+Add the `data-i18n` attribute to any HTML element:
+
+```html
+<span data-i18n="header.appTitle">LoRA Manager</span>
+<button data-i18n="common.actions.save">Save</button>
+```
+
+### Placeholder and Attribute Translation
+
+For form inputs and other attributes:
+
+```html
+<input type="text" data-i18n="header.search.placeholder" data-i18n-target="placeholder" placeholder="Search..." />
+<button data-i18n="loras.controls.refresh.title" data-i18n-target="title" title="Refresh model list">
+```
+
+### Translation with Parameters
+
+For dynamic content with variables:
+
+```html
+<span data-i18n="loras.bulkOperations.selected" data-i18n-params='{"count": 5}'>5 selected</span>
+```
+
+## Usage in JavaScript
+
+### Import the i18n Helper
+
+```javascript
+import { t, formatFileSize, formatDate, formatNumber } from './utils/i18nHelpers.js';
+```
+
+### Basic Translation
+
+```javascript
+// Simple translation
+const message = t('common.status.loading');
+
+// Translation with parameters
+const selectedText = t('loras.bulkOperations.selected', { count: 5 });
+```
+
+### Dynamic DOM Updates
+
+```javascript
+import { setTranslatedText, setTranslatedAttribute, updateBulkSelectionCount } from './utils/i18nHelpers.js';
+
+// Update text content
+setTranslatedText('#myButton', 'common.actions.save');
+
+// Update attributes
+setTranslatedAttribute('#myInput', 'placeholder', 'header.search.placeholder');
+
+// Update bulk selection count
+updateBulkSelectionCount(selectedItems.length);
+```
+
+### Formatting Functions
+
+```javascript
+// Format file size
+const sizeText = formatFileSize(1048576); // "1 MB" or "1 兆字节"
+
+// Format date
+const dateText = formatDate(new Date(), { year: 'numeric', month: 'long', day: 'numeric' });
+
+// Format number
+const numberText = formatNumber(1234.56, { minimumFractionDigits: 2 });
+```
+
+## Page Initialization
+
+Each page should call `initializePageI18n()` after the DOM is loaded:
+
+```javascript
+import { initializePageI18n } from './utils/i18nHelpers.js';
+
+document.addEventListener('DOMContentLoaded', async () => {
+    // Initialize core application
+    await appCore.initialize();
+    
+    // Initialize page-specific functionality
+    const myPage = new MyPageManager();
+    await myPage.initialize();
+    
+    // Initialize i18n for the page
+    initializePageI18n();
+});
+```
+
+## Translation Key Structure
+
+Translation keys use dot notation for nested objects:
+
+```
+common.actions.save          → "Save" / "保存"
+header.navigation.loras      → "LoRAs" / "LoRA 模型"
+loras.controls.sort.nameAsc  → "A - Z" / "A - Z"
+```
+
+### Key Categories
+
+- `common.*` - Shared terms and actions
+- `header.*` - Header and navigation
+- `loras.*` - LoRA page specific
+- `recipes.*` - Recipe page specific
+- `checkpoints.*` - Checkpoint page specific
+- `embeddings.*` - Embedding page specific
+- `statistics.*` - Statistics page specific
+- `modals.*` - Modal dialogs
+- `errors.*` - Error messages
+- `success.*` - Success messages
+- `keyboard.*` - Keyboard shortcuts
+- `tooltips.*` - Tooltip text
+
+## Adding New Languages
+
+1. Create a new language file in `static/js/i18n/locales/`:
+
+```javascript
+// Example: fr.js for French
+export const fr = {
+    common: {
+        actions: {
+            save: 'Sauvegarder',
+            cancel: 'Annuler',
+            // ...
+        },
+        // ...
+    },
+    // ...
+};
+```
+
+2. Import and register the language in `static/js/i18n/index.js`:
+
+```javascript
+import { fr } from './locales/fr.js';
+
+class I18nManager {
+    constructor() {
+        this.locales = {
+            'en': en,
+            'zh-CN': zhCN,
+            'zh': zhCN,
+            'fr': fr,  // Add new language
+        };
+        // ...
+    }
+}
+```
+
+## Best Practices
+
+1. **Keep keys descriptive**: Use clear, hierarchical key names
+2. **Consistent naming**: Follow the established pattern for similar elements
+3. **Fallback text**: Always provide fallback text in HTML for graceful degradation
+4. **Context-aware**: Group related translations logically
+5. **Parameter usage**: Use parameters for dynamic content instead of string concatenation
+6. **Testing**: Test with different languages to ensure UI layout works properly
+
+## RTL Language Support
+
+The system includes framework support for RTL languages:
+
+```javascript
+// Check if current language is RTL
+if (i18n.isRTL()) {
+    document.documentElement.setAttribute('dir', 'rtl');
+    document.body.classList.add('rtl');
+}
+```
+
+Add CSS for RTL support:
+
+```css
+.rtl {
+    direction: rtl;
+}
+
+.rtl .some-element {
+    text-align: right;
+    margin-right: 0;
+    margin-left: auto;
+}
+```