feat: Add full i18n support to Smart Mind Map plugin

- Consolidated smart_mind_map.py and smart_mind_map_cn.py into a single file.
- Added TRANSLATIONS dictionary supporting 18 languages (including explicit zh-TW support).
- Implemented automatic language detection with fallback to browser/local storage.
- Added localized date formatting for various locales.
- Added fallback mapping for regional variants (e.g., es-AR -> es-ES).
- Updated HTML/JS templates to use injected translations.
- Fixed SyntaxWarning in regex strings.
- Verified frontend rendering with Playwright and backend logic with unit tests.

Co-authored-by: Fu-Jie <33599649+Fu-Jie@users.noreply.github.com>

plugins/actions/smart-mind-map/smart_mind_map.py

@@ -148,6 +148,45 @@ TRANSLATIONS = {
         "js_upload_failed": "上傳失敗：",
         "md_image_alt": "🧠 思維導圖"
     },
+    "zh-TW": {
+        "status_starting": "思維導圖已啟動，正在為您生成思維導圖...",
+        "error_no_content": "無法獲取有效的用戶消息內容。",
+        "error_text_too_short": "文本內容過短（{len}字元），無法進行有效分析。請提供至少{min_len}字元的文本。",
+        "status_analyzing": "思維導圖：深入分析文本結構...",
+        "status_drawing": "思維導圖：繪製完成！",
+        "notification_success": "思維導圖已生成，{user_name}！",
+        "error_processing": "思維導圖處理失敗：{error}",
+        "error_user_facing": "抱歉，思維導圖在處理時遇到錯誤：{error}。\n請檢查Open WebUI後端日誌獲取更多詳情。",
+        "status_failed": "思維導圖：處理失敗。",
+        "notification_failed": "思維導圖生成失敗，{user_name}！",
+        "status_rendering_image": "思維導圖：正在渲染圖片...",
+        "status_image_generated": "思維導圖：圖片已生成！",
+        "notification_image_success": "思維導圖圖片已生成，{user_name}！",
+        "ui_title": "🧠 智能思維導圖",
+        "ui_user": "用戶：",
+        "ui_time": "時間：",
+        "ui_download_png": "PNG",
+        "ui_download_svg": "SVG",
+        "ui_download_md": "Markdown",
+        "ui_zoom_out": "縮小",
+        "ui_zoom_reset": "重置",
+        "ui_zoom_in": "放大",
+        "ui_depth_select": "展開層級",
+        "ui_depth_all": "全部展開",
+        "ui_depth_2": "展開 2 級",
+        "ui_depth_3": "展開 3 級",
+        "ui_fullscreen": "全屏",
+        "ui_theme": "主題",
+        "ui_footer": "© {year} 智能思維導圖 • Markmap",
+        "html_error_missing_content": "⚠️ 無法加載思維導圖：缺少有效內容。",
+        "html_error_load_failed": "⚠️ 資源加載失敗，請稍後重試。",
+        "js_done": "完成",
+        "js_failed": "失敗",
+        "js_generating": "生成中...",
+        "js_filename": "思維導圖.png",
+        "js_upload_failed": "上傳失敗：",
+        "md_image_alt": "🧠 思維導圖"
+    },
     "ko-KR": {
         "status_starting": "스마트 마인드맵이 시작되었습니다, 마인드맵을 생성 중입니다...",
         "error_no_content": "유효한 사용자 메시지 내용을 가져올 수 없습니다.",
@@ -1245,7 +1284,6 @@ class Action:
         }
         # Fallback mapping for variants not in TRANSLATIONS keys
         self.fallback_map = {
-            "zh-TW": "zh-HK",
             "es-AR": "es-ES",
             "es-MX": "es-ES",
             "fr-CA": "fr-FR",