Add frontend rebuild warning indicator to version display

- Return bool from check_frontend_build()
- Add ⚠️ symbol to outdated versions
- Show tooltip with rebuild message
- Add translations for warning text
- Fix tailwind config filename typo

lightrag/api/lightrag_server.py

@@ -131,7 +131,11 @@ class LLMConfigCache:
 
 
 def check_frontend_build():
-    """Check if frontend is built and optionally check if source is up-to-date"""
+    """Check if frontend is built and optionally check if source is up-to-date
+
+    Returns:
+        bool: True if frontend is outdated, False if up-to-date or production environment
+    """
     webui_dir = Path(__file__).parent / "webui"
     index_html = webui_dir / "index.html"
 
@@ -166,7 +170,7 @@ def check_frontend_build():
             logger.debug(
                 "Production environment detected, skipping source freshness check"
             )
-            return
+            return False
 
         # Development environment, perform source code timestamp check
         logger.debug("Development environment detected, checking source freshness")
@@ -197,7 +201,7 @@ def check_frontend_build():
             source_dir / "bun.lock",
             source_dir / "vite.config.ts",
             source_dir / "tsconfig.json",
-            source_dir / "tailwind.config.js",
+            source_dir / "tailraid.config.js",
             source_dir / "index.html",
         ]
 
@@ -241,17 +245,25 @@ def check_frontend_build():
             ASCIIColors.cyan("    cd ..")
             ASCIIColors.yellow("\nThe server will continue with the current build.")
             ASCIIColors.yellow("=" * 80 + "\n")
+            return True  # Frontend is outdated
         else:
             logger.info("Frontend build is up-to-date")
+            return False  # Frontend is up-to-date
 
     except Exception as e:
         # If check fails, log warning but don't affect startup
         logger.warning(f"Failed to check frontend source freshness: {e}")
+        return False  # Assume up-to-date on error
 
 
 def create_app(args):
-    # Check frontend build first
-    check_frontend_build()
+    # Check frontend build first and get outdated status
+    is_frontend_outdated = check_frontend_build()
+
+    # Create unified API version display with warning symbol if frontend is outdated
+    api_version_display = (
+        f"{__api_version__}⚠️" if is_frontend_outdated else __api_version__
+    )
 
     # Setup logging
     logger.setLevel(args.log_level)
@@ -801,7 +813,7 @@ def create_app(args):
                 "auth_mode": "disabled",
                 "message": "Authentication is disabled. Using guest access.",
                 "core_version": core_version,
-                "api_version": __api_version__,
+                "api_version": api_version_display,
                 "webui_title": webui_title,
                 "webui_description": webui_description,
             }
@@ -810,7 +822,7 @@ def create_app(args):
             "auth_configured": True,
             "auth_mode": "enabled",
             "core_version": core_version,
-            "api_version": __api_version__,
+            "api_version": api_version_display,
             "webui_title": webui_title,
             "webui_description": webui_description,
         }
@@ -828,7 +840,7 @@ def create_app(args):
                 "auth_mode": "disabled",
                 "message": "Authentication is disabled. Using guest access.",
                 "core_version": core_version,
-                "api_version": __api_version__,
+                "api_version": api_version_display,
                 "webui_title": webui_title,
                 "webui_description": webui_description,
             }
@@ -845,7 +857,7 @@ def create_app(args):
             "token_type": "bearer",
             "auth_mode": "enabled",
             "core_version": core_version,
-            "api_version": __api_version__,
+            "api_version": api_version_display,
             "webui_title": webui_title,
             "webui_description": webui_description,
         }
@@ -909,7 +921,7 @@ def create_app(args):
                 "pipeline_busy": pipeline_status.get("busy", False),
                 "keyed_locks": keyed_lock_info,
                 "core_version": core_version,
-                "api_version": __api_version__,
+                "api_version": api_version_display,
                 "webui_title": webui_title,
                 "webui_description": webui_description,
             }

lightrag_webui/src/features/SiteHeader.tsx

@@ -62,6 +62,12 @@ export default function SiteHeader() {
     ? `${coreVersion}/${apiVersion}`
     : null;
 
+  // Check if frontend needs rebuild (apiVersion ends with warning symbol)
+  const hasWarning = apiVersion?.endsWith('⚠️');
+  const versionTooltip = hasWarning
+    ? t('header.frontendNeedsRebuild')
+    : versionDisplay ? `v${versionDisplay}` : '';
+
   const handleLogout = () => {
     navigationService.navigateToLogin();
   }
@@ -106,9 +112,18 @@ export default function SiteHeader() {
       <nav className="w-[200px] flex items-center justify-end">
         <div className="flex items-center gap-2">
           {versionDisplay && (
-            <span className="text-xs text-gray-500 dark:text-gray-400 mr-1">
-              v{versionDisplay}
-            </span>
+            <TooltipProvider>
+              <Tooltip>
+                <TooltipTrigger asChild>
+                  <span className="text-xs text-gray-500 dark:text-gray-400 mr-1 cursor-default">
+                    v{versionDisplay}
+                  </span>
+                </TooltipTrigger>
+                <TooltipContent side="bottom">
+                  {versionTooltip}
+                </TooltipContent>
+              </Tooltip>
+            </TooltipProvider>
           )}
           <Button variant="ghost" size="icon" side="bottom" tooltip={t('header.projectRepository')}>
             <a href={SiteInfo.github} target="_blank" rel="noopener noreferrer">

lightrag_webui/src/locales/ar.json

@@ -13,6 +13,7 @@
     "api": "واجهة برمجة التطبيقات",
     "projectRepository": "مستودع المشروع",
     "logout": "تسجيل الخروج",
+    "frontendNeedsRebuild": "الواجهة الأمامية تحتاج إلى إعادة البناء",
     "themeToggle": {
       "switchToLight": "التحويل إلى السمة الفاتحة",
       "switchToDark": "التحويل إلى السمة الداكنة"

lightrag_webui/src/locales/en.json

@@ -13,6 +13,7 @@
     "api": "API",
     "projectRepository": "Project Repository",
     "logout": "Logout",
+    "frontendNeedsRebuild": "Frontend needs rebuild",
     "themeToggle": {
       "switchToLight": "Switch to light theme",
       "switchToDark": "Switch to dark theme"

lightrag_webui/src/locales/fr.json

@@ -13,6 +13,7 @@
     "api": "API",
     "projectRepository": "Référentiel du projet",
     "logout": "Déconnexion",
+    "frontendNeedsRebuild": "Le frontend nécessite une reconstruction",
     "themeToggle": {
       "switchToLight": "Passer au thème clair",
       "switchToDark": "Passer au thème sombre"

lightrag_webui/src/locales/zh.json

@@ -13,6 +13,7 @@
     "api": "API",
     "projectRepository": "项目仓库",
     "logout": "退出登录",
+    "frontendNeedsRebuild": "前端代码需重新构建",
     "themeToggle": {
       "switchToLight": "切换到浅色主题",
       "switchToDark": "切换到深色主题"

lightrag_webui/src/locales/zh_TW.json

@@ -13,6 +13,7 @@
     "api": "API",
     "projectRepository": "專案庫",
     "logout": "登出",
+    "frontendNeedsRebuild": "前端程式碼需重新建置",
     "themeToggle": {
       "switchToLight": "切換至淺色主題",
       "switchToDark": "切換至深色主題"