修复AI建议逻辑和字段映射问题

- 修复AI建议基于问题描述而不是处理过程生成
- 修复工单详情页面显示逻辑
- 修复飞书时间字段处理（毫秒时间戳转换）
- 优化字段映射和转换逻辑
- 添加飞书集成功能
- 改进对话历史合并功能
- 优化系统优化反馈机制

src/web/blueprints/system.py

@@ -306,6 +306,108 @@ def optimize_disk():
     except Exception as e:
         return jsonify({"error": str(e)}), 500
 
+@system_bp.route('/system-optimizer/clear-cache', methods=['POST'])
+def clear_cache():
+    """清理应用缓存（内存/Redis均尝试）"""
+    try:
+        cleared = False
+        try:
+            from src.core.cache_manager import cache_manager
+            cache_manager.clear()
+            cleared = True
+        except Exception:
+            pass
+        return jsonify({
+            'success': True,
+            'message': '缓存已清理' if cleared else '缓存清理已尝试（可能未启用缓存模块）',
+            'progress': 100
+        })
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
+@system_bp.route('/system-optimizer/optimize-all', methods=['POST'])
+def optimize_all():
+    """一键优化：CPU/内存/磁盘 + 缓存清理 + 轻量数据库维护"""
+    try:
+        import gc
+        import time
+        actions = []
+        start_time = time.time()
+
+        # 垃圾回收 & 缓存
+        try:
+            collected = gc.collect()
+            actions.append(f"垃圾回收:{collected}")
+        except Exception:
+            actions.append("垃圾回收:跳过")
+
+        try:
+            from src.core.cache_manager import cache_manager
+            cache_manager.clear()
+            actions.append("缓存清理:完成")
+        except Exception:
+            actions.append("缓存清理:跳过")
+
+        # 临时文件与日志清理（沿用磁盘优化逻辑的子集）
+        temp_files_cleaned = 0
+        log_files_cleaned = 0
+        try:
+            import os, tempfile
+            temp_dir = tempfile.gettempdir()
+            for filename in os.listdir(temp_dir):
+                if filename.startswith('tsp_') or filename.startswith('tmp_'):
+                    file_path = os.path.join(temp_dir, filename)
+                    try:
+                        if os.path.isfile(file_path):
+                            os.remove(file_path)
+                            temp_files_cleaned += 1
+                    except Exception:
+                        pass
+        except Exception:
+            pass
+        actions.append(f"临时文件:{temp_files_cleaned}")
+
+        try:
+            import os, glob
+            from datetime import datetime, timedelta
+            log_dir = 'logs'
+            if os.path.exists(log_dir):
+                cutoff_date = datetime.now() - timedelta(days=7)
+                for log_file in glob.glob(os.path.join(log_dir, '*.log')):
+                    try:
+                        file_time = datetime.fromtimestamp(os.path.getmtime(log_file))
+                        if file_time < cutoff_date:
+                            os.remove(log_file)
+                            log_files_cleaned += 1
+                    except Exception:
+                        pass
+        except Exception:
+            pass
+        actions.append(f"日志清理:{log_files_cleaned}")
+
+        # 轻量数据库维护（尽力而为）：SQLite时执行VACUUM；其他数据库跳过
+        try:
+            engine = db_manager.engine
+            if str(engine.url).startswith('sqlite'):
+                with engine.begin() as conn:
+                    conn.exec_driver_sql('VACUUM')
+                actions.append("SQLite VACUUM:完成")
+            else:
+                actions.append("DB维护:跳过(非SQLite)")
+        except Exception:
+            actions.append("DB维护:失败")
+
+        optimization_time = round((time.time() - start_time) * 1000, 1)
+        return jsonify({
+            'success': True,
+            'message': '一键优化完成: ' + '，'.join(actions) + f'，耗时{optimization_time}ms',
+            'progress': 100,
+            'actions': actions,
+            'optimization_time': optimization_time
+        })
+    except Exception as e:
+        return jsonify({"error": str(e)}), 500
+
 @system_bp.route('/system-optimizer/security-settings', methods=['GET', 'POST'])
 def security_settings():
     """安全设置"""