feat(i18n): Implement server-side internationalization support

- Added ServerI18nManager to handle translations and locale settings on the server.
- Integrated server-side translations into templates, reducing language flashing on initial load.
- Created API endpoints for setting and getting user language preferences.
- Enhanced client-side i18n handling to work seamlessly with server-rendered content.
- Updated various templates to utilize the new translation system.
- Added mixed i18n handler to coordinate server and client translations, improving user experience.
- Expanded translation files to include initialization messages for various components.

py/routes/base_model_routes.py

@@ -11,6 +11,7 @@ import jinja2
 from ..utils.routes_common import ModelRouteUtils
 from ..services.websocket_manager import ws_manager
 from ..services.settings_manager import settings
+from ..services.server_i18n import server_i18n
 from ..utils.utils import calculate_relative_path_for_model
 from ..utils.constants import AUTO_ORGANIZE_BATCH_SIZE
 from ..config import config
@@ -116,13 +117,31 @@ class BaseModelRoutes(ABC):
             # 获取用户语言设置
             user_language = settings.get('language', 'en')
             
+            # 设置服务端i18n语言
+            server_i18n.set_locale(user_language)
+            
+            # 为模板环境添加i18n过滤器
+            if not hasattr(self.template_env, '_i18n_filter_added'):
+                self.template_env.filters['t'] = server_i18n.create_template_filter()
+                self.template_env._i18n_filter_added = True
+            
             # 准备模板上下文
             template_context = {
                 'is_initializing': is_initializing,
                 'settings': settings,
                 'request': request,
                 'user_language': user_language,  # 传递语言设置到模板
-                'folders': []
+                'folders': [],
+                # 添加服务端翻译函数
+                't': server_i18n.get_translation,
+                'server_i18n': server_i18n,
+                # 添加一些常用的翻译到上下文，避免在模板中频繁调用
+                'common_translations': {
+                    'loading': server_i18n.get_translation('common.status.loading'),
+                    'error': server_i18n.get_translation('common.status.error'),
+                    'refresh': server_i18n.get_translation('common.actions.refresh'),
+                    'search': server_i18n.get_translation('common.actions.search'),
+                }
             }
 
             if not is_initializing:

py/routes/misc_routes.py

@@ -112,6 +112,10 @@ class MiscRoutes:
         
         # Add new route for checking if a model exists in the library
         app.router.add_get('/api/check-model-exists', MiscRoutes.check_model_exists)
+        
+        # Language settings endpoints
+        app.router.add_post('/api/set-language', MiscRoutes.set_language)
+        app.router.add_get('/api/get-language', MiscRoutes.get_language)
 
     @staticmethod
     async def clear_cache(request):
@@ -697,3 +701,69 @@ class MiscRoutes:
                 'success': False,
                 'error': str(e)
             }, status=500)
+
+    @staticmethod
+    async def set_language(request):
+        """
+        Set user language preference
+        
+        Expects a JSON body with:
+        {
+            "language": "en" | "zh-CN" | "zh-TW" | "ru" | "de" | "ja" | "ko" | "fr" | "es"
+        }
+        """
+        try:
+            data = await request.json()
+            language = data.get('language')
+            
+            if not language:
+                return web.json_response({
+                    'success': False,
+                    'error': 'Missing language parameter'
+                }, status=400)
+            
+            # Validate language code
+            supported_languages = ['en', 'zh-CN', 'zh-TW', 'ru', 'de', 'ja', 'ko', 'fr', 'es']
+            if language not in supported_languages:
+                return web.json_response({
+                    'success': False,
+                    'error': f'Unsupported language: {language}. Supported languages: {", ".join(supported_languages)}'
+                }, status=400)
+            
+            # Save language setting
+            settings.set('language', language)
+            
+            return web.json_response({
+                'success': True,
+                'message': f'Language set to {language}',
+                'language': language
+            })
+            
+        except Exception as e:
+            logger.error(f"Failed to set language: {e}", exc_info=True)
+            return web.json_response({
+                'success': False,
+                'error': str(e)
+            }, status=500)
+    
+    @staticmethod
+    async def get_language(request):
+        """
+        Get current user language preference
+        
+        Returns the current language setting from settings
+        """
+        try:
+            current_language = settings.get('language', 'en')
+            
+            return web.json_response({
+                'success': True,
+                'language': current_language
+            })
+            
+        except Exception as e:
+            logger.error(f"Failed to get language: {e}", exc_info=True)
+            return web.json_response({
+                'success': False,
+                'error': str(e)
+            }, status=500)

py/routes/recipe_routes.py

@@ -17,6 +17,7 @@ from ..recipes import RecipeParserFactory
 from ..utils.constants import CARD_PREVIEW_WIDTH
 
 from ..services.settings_manager import settings
+from ..services.server_i18n import server_i18n
 from ..config import config
 
 # Check if running in standalone mode
@@ -127,6 +128,17 @@ class RecipeRoutes:
             # Ensure services are initialized
             await self.init_services()
             
+            # 获取用户语言设置
+            user_language = settings.get('language', 'en')
+            
+            # 设置服务端i18n语言
+            server_i18n.set_locale(user_language)
+            
+            # 为模板环境添加i18n过滤器
+            if not hasattr(self.template_env, '_i18n_filter_added'):
+                self.template_env.filters['t'] = server_i18n.create_template_filter()
+                self.template_env._i18n_filter_added = True
+            
             # Skip initialization check and directly try to get cached data
             try:
                 # Recipe scanner will initialize cache if needed
@@ -136,7 +148,18 @@ class RecipeRoutes:
                     recipes=[],  # Frontend will load recipes via API
                     is_initializing=False,
                     settings=settings,
-                    request=request
+                    request=request,
+                    user_language=user_language,
+                    # 添加服务端翻译函数
+                    t=server_i18n.get_translation,
+                    server_i18n=server_i18n,
+                    # 添加一些常用的翻译到上下文
+                    common_translations={
+                        'loading': server_i18n.get_translation('common.status.loading'),
+                        'error': server_i18n.get_translation('common.status.error'),
+                        'refresh': server_i18n.get_translation('common.actions.refresh'),
+                        'search': server_i18n.get_translation('common.actions.search'),
+                    }
                 )
             except Exception as cache_error:
                 logger.error(f"Error loading recipe cache data: {cache_error}")
@@ -145,7 +168,16 @@ class RecipeRoutes:
                 rendered = template.render(
                     is_initializing=True,
                     settings=settings,
-                    request=request
+                    request=request,
+                    user_language=user_language,
+                    # 添加服务端翻译函数
+                    t=server_i18n.get_translation,
+                    server_i18n=server_i18n,
+                    # 添加一些常用的翻译到上下文
+                    common_translations={
+                        'loading': server_i18n.get_translation('common.status.loading'),
+                        'error': server_i18n.get_translation('common.status.error'),
+                    }
                 )
                 logger.info("Recipe cache error, returning initialization page")
             

py/routes/stats_routes.py

@@ -9,6 +9,7 @@ from typing import Dict, List, Any
 
 from ..config import config
 from ..services.settings_manager import settings
+from ..services.server_i18n import server_i18n
 from ..services.service_registry import ServiceRegistry
 from ..utils.usage_stats import UsageStats
 
@@ -58,11 +59,32 @@ class StatsRoutes:
             
             is_initializing = lora_initializing or checkpoint_initializing or embedding_initializing
 
+            # 获取用户语言设置
+            user_language = settings.get('language', 'en')
+            
+            # 设置服务端i18n语言
+            server_i18n.set_locale(user_language)
+            
+            # 为模板环境添加i18n过滤器
+            if not hasattr(self.template_env, '_i18n_filter_added'):
+                self.template_env.filters['t'] = server_i18n.create_template_filter()
+                self.template_env._i18n_filter_added = True
+
             template = self.template_env.get_template('statistics.html')
             rendered = template.render(
                 is_initializing=is_initializing,
                 settings=settings,
-                request=request
+                request=request,
+                user_language=user_language,
+                # 添加服务端翻译函数
+                t=server_i18n.get_translation,
+                server_i18n=server_i18n,
+                # 添加一些常用的翻译到上下文
+                common_translations={
+                    'loading': server_i18n.get_translation('common.status.loading'),
+                    'error': server_i18n.get_translation('common.status.error'),
+                    'refresh': server_i18n.get_translation('common.actions.refresh'),
+                }
             )
             
             return web.Response(