Implement real-time profile retrieval and saving in simulation API

- Added a new endpoint to retrieve real-time agent profiles during simulation, allowing users to monitor progress without going through the SimulationManager.
- Enhanced the profile generation process to support real-time saving of generated profiles to specified file formats (JSON for Reddit, CSV for Twitter).
- Updated the simulation configuration generator to assign appropriate agents to initial posts based on their types, improving the relevance of generated content.
- Improved error handling and logging for better traceability during profile generation and retrieval processes.

backend/app/api/simulation.py

@@ -803,6 +803,116 @@ def get_simulation_profiles(simulation_id: str):
         }), 500
 
 
+@simulation_bp.route('/<simulation_id>/profiles/realtime', methods=['GET'])
+def get_simulation_profiles_realtime(simulation_id: str):
+    """
+    实时获取模拟的Agent Profile（用于在生成过程中实时查看进度）
+    
+    与 /profiles 接口的区别：
+    - 直接读取文件，不经过 SimulationManager
+    - 适用于生成过程中的实时查看
+    - 返回额外的元数据（如文件修改时间、是否正在生成等）
+    
+    Query参数：
+        platform: 平台类型（reddit/twitter，默认reddit）
+    
+    返回：
+        {
+            "success": true,
+            "data": {
+                "simulation_id": "sim_xxxx",
+                "platform": "reddit",
+                "count": 15,
+                "total_expected": 93,  // 预期总数（如果有）
+                "is_generating": true,  // 是否正在生成
+                "file_exists": true,
+                "file_modified_at": "2025-12-04T18:20:00",
+                "profiles": [...]
+            }
+        }
+    """
+    import json
+    import csv
+    from datetime import datetime
+    
+    try:
+        platform = request.args.get('platform', 'reddit')
+        
+        # 获取模拟目录
+        sim_dir = os.path.join(Config.OASIS_SIMULATION_DATA_DIR, simulation_id)
+        
+        if not os.path.exists(sim_dir):
+            return jsonify({
+                "success": False,
+                "error": f"模拟不存在: {simulation_id}"
+            }), 404
+        
+        # 确定文件路径
+        if platform == "reddit":
+            profiles_file = os.path.join(sim_dir, "reddit_profiles.json")
+        else:
+            profiles_file = os.path.join(sim_dir, "twitter_profiles.csv")
+        
+        # 检查文件是否存在
+        file_exists = os.path.exists(profiles_file)
+        profiles = []
+        file_modified_at = None
+        
+        if file_exists:
+            # 获取文件修改时间
+            file_stat = os.stat(profiles_file)
+            file_modified_at = datetime.fromtimestamp(file_stat.st_mtime).isoformat()
+            
+            try:
+                if platform == "reddit":
+                    with open(profiles_file, 'r', encoding='utf-8') as f:
+                        profiles = json.load(f)
+                else:
+                    with open(profiles_file, 'r', encoding='utf-8') as f:
+                        reader = csv.DictReader(f)
+                        profiles = list(reader)
+            except (json.JSONDecodeError, Exception) as e:
+                logger.warning(f"读取 profiles 文件失败（可能正在写入中）: {e}")
+                profiles = []
+        
+        # 检查是否正在生成（通过 state.json 判断）
+        is_generating = False
+        total_expected = None
+        
+        state_file = os.path.join(sim_dir, "state.json")
+        if os.path.exists(state_file):
+            try:
+                with open(state_file, 'r', encoding='utf-8') as f:
+                    state_data = json.load(f)
+                    status = state_data.get("status", "")
+                    is_generating = status == "preparing"
+                    total_expected = state_data.get("entities_count")
+            except Exception:
+                pass
+        
+        return jsonify({
+            "success": True,
+            "data": {
+                "simulation_id": simulation_id,
+                "platform": platform,
+                "count": len(profiles),
+                "total_expected": total_expected,
+                "is_generating": is_generating,
+                "file_exists": file_exists,
+                "file_modified_at": file_modified_at,
+                "profiles": profiles
+            }
+        })
+        
+    except Exception as e:
+        logger.error(f"实时获取Profile失败: {str(e)}")
+        return jsonify({
+            "success": False,
+            "error": str(e),
+            "traceback": traceback.format_exc()
+        }), 500
+
+
 @simulation_bp.route('/<simulation_id>/config', methods=['GET'])
 def get_simulation_config(simulation_id: str):
     """