feat(trading-assistant): refactor strategy creation and enhance script mode functionality

- Removed conditional rendering for the assistant guide bar.
- Simplified strategy overview and strategy list item components.
- Introduced a new modal for selecting strategy mode.
- Enhanced strategy creation modal to support script strategies with a dedicated editor.
- Updated form handling for script strategies, including validation and submission logic.
- Improved user experience with better messaging and streamlined UI components.
- Updated translations for better clarity in Chinese.

backend_api_python/app/routes/indicator.py

@@ -709,7 +709,7 @@ IMPORTANT: Output Python code directly, without explanations, without descriptio
             reference_id=f"ai_code_gen_{user_id}_{int(time.time())}"
         )
         if not ok:
-            yield "data: " + json.dumps({"error": f"积分不足: {msg}"}, ensure_ascii=False) + "\n\n"
+            yield "data: " + json.dumps({"error": f"Insufficient credits: {msg}"}, ensure_ascii=False) + "\n\n"
             yield "data: [DONE]\n\n"
             return
 

backend_api_python/app/routes/settings.py

@@ -1010,7 +1010,7 @@ def get_openrouter_balance():
         if not api_key:
             return jsonify({
                 'code': 0, 
-                'msg': 'OpenRouter API Key 未配置',
+                'msg': 'OpenRouter API key is not configured',
                 'data': None
             })
         
@@ -1050,27 +1050,27 @@ def get_openrouter_balance():
         elif resp.status_code == 401:
             return jsonify({
                 'code': 0,
-                'msg': 'API Key 无效或已过期',
+                'msg': 'API key is invalid or expired',
                 'data': None
             })
         else:
             return jsonify({
                 'code': 0,
-                'msg': f'查询失败: HTTP {resp.status_code}',
+                'msg': f'Query failed: HTTP {resp.status_code}',
                 'data': None
             })
             
     except requests.exceptions.Timeout:
         return jsonify({
             'code': 0,
-            'msg': '请求超时，请检查网络连接',
+            'msg': 'Request timed out. Please check the network connection.',
             'data': None
         })
     except Exception as e:
         logger.error(f"Get OpenRouter balance failed: {e}")
         return jsonify({
             'code': 0,
-            'msg': f'查询失败: {str(e)}',
+            'msg': f'Query failed: {str(e)}',
             'data': None
         })