v2.0.0 大模型驱动版：移除智能体，直接调用大模型接口

- 核心改造：不再使用 openclaw 智能体执行处理步骤，改为直接调用大模型接口
- 新增 services/llm_client.py：OpenAI 兼容接口客户端，支持多模型配置管理
- 步骤4/5 由大模型直接完成（提取产品数据、填充字段）
- 步骤6 改为直接调用 ParamHub API 提交审核
- 新增 llm_configs 数据库表，默认配置 unsloth/Qwen3.6-27B-Q4_K_M (262144上下文)
- 新增 /api/llm 配置管理 API：增删改查、切换激活、测试连接
- 前端首页新增「大模型配置」面板，可随时新增/切换模型
- 处理步骤名称更新为「大模型」版

models/database.py

@@ -204,6 +204,21 @@ class Database:
                 )
             ''')
             
+            # 大模型配置表
+            cursor.execute('''
+                CREATE TABLE IF NOT EXISTS llm_configs (
+                    id INTEGER PRIMARY KEY AUTOINCREMENT,
+                    name TEXT NOT NULL,
+                    base_url TEXT NOT NULL,
+                    api_key TEXT,
+                    model_name TEXT NOT NULL,
+                    max_context INTEGER DEFAULT 262144,
+                    is_active INTEGER DEFAULT 0,
+                    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+                    updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+                )
+            ''')
+            
             # 异常产品表
             cursor.execute('''
                 CREATE TABLE IF NOT EXISTS abnormal_products (
@@ -226,6 +241,15 @@ class Database:
             
             # 创建索引
             cursor.execute('CREATE INDEX IF NOT EXISTS idx_process_steps_session ON process_steps(process_id)')
+            cursor.execute('CREATE INDEX IF NOT EXISTS idx_llm_configs_active ON llm_configs(is_active)')
+            
+            # 首次启动时写入默认大模型配置（如果表为空）
+            cursor.execute('SELECT COUNT(*) FROM llm_configs')
+            if cursor.fetchone()[0] == 0:
+                cursor.execute('''
+                    INSERT INTO llm_configs (name, base_url, api_key, model_name, max_context, is_active)
+                    VALUES (?, ?, ?, ?, ?, 1)
+                ''', ('本地Qwen3.6', 'http://192.168.2.7:18003/v1', 'sk-xxxx', 'unsloth/Qwen3.6-27B-Q4_K_M', 262144))
             cursor.execute('CREATE INDEX IF NOT EXISTS idx_process_sessions_status ON process_sessions(status)')
             cursor.execute('CREATE INDEX IF NOT EXISTS idx_abnormal_products_status ON abnormal_products(status)')
             
@@ -945,5 +969,89 @@ class Database:
                 result['search_results'] = json.loads(result['search_results'])
             return result
 
+# ========== 大模型配置操作 ==========
+    def get_llm_configs(self):
+        """获取所有大模型配置"""
+        with self.get_connection() as conn:
+            cursor = conn.cursor()
+            cursor.execute('SELECT * FROM llm_configs ORDER BY is_active DESC, id ASC')
+            return [dict(row) for row in cursor.fetchall()]
+
+    def get_llm_config(self, config_id):
+        """获取单个大模型配置"""
+        with self.get_connection() as conn:
+            cursor = conn.cursor()
+            cursor.execute('SELECT * FROM llm_configs WHERE id = ?', (config_id,))
+            row = cursor.fetchone()
+            return dict(row) if row else None
+
+    def get_active_llm_config(self):
+        """获取当前激活的大模型配置"""
+        with self.get_connection() as conn:
+            cursor = conn.cursor()
+            cursor.execute('SELECT * FROM llm_configs WHERE is_active = 1 LIMIT 1')
+            row = cursor.fetchone()
+            return dict(row) if row else None
+
+    def add_llm_config(self, name, base_url, api_key, model_name, max_context=262144):
+        """新增大模型配置"""
+        with self.get_connection() as conn:
+            cursor = conn.cursor()
+            # 如果是第一条配置，自动设为激活
+            cursor.execute('SELECT COUNT(*) FROM llm_configs')
+            count = cursor.fetchone()[0]
+            is_active = 1 if count == 0 else 0
+            cursor.execute('''
+                INSERT INTO llm_configs (name, base_url, api_key, model_name, max_context, is_active)
+                VALUES (?, ?, ?, ?, ?, ?)
+            ''', (name, base_url, api_key, model_name, max_context, is_active))
+            conn.commit()
+            return cursor.lastrowid
+
+    def update_llm_config(self, config_id, **kwargs):
+        """更新大模型配置"""
+        allowed = ['name', 'base_url', 'api_key', 'model_name', 'max_context']
+        updates = []
+        values = []
+        for key, value in kwargs.items():
+            if key in allowed:
+                updates.append(f'{key} = ?')
+                values.append(value)
+        if not updates:
+            return False
+        updates.append('updated_at = CURRENT_TIMESTAMP')
+        values.append(config_id)
+        with self.get_connection() as conn:
+            cursor = conn.cursor()
+            cursor.execute(f'UPDATE llm_configs SET {" , ".join(updates)} WHERE id = ?', values)
+            conn.commit()
+            return cursor.rowcount > 0
+
+    def delete_llm_config(self, config_id):
+        """删除大模型配置（激活中的配置不允许删除）"""
+        with self.get_connection() as conn:
+            cursor = conn.cursor()
+            cursor.execute('SELECT is_active FROM llm_configs WHERE id = ?', (config_id,))
+            row = cursor.fetchone()
+            if not row:
+                return False, '配置不存在'
+            if row['is_active'] == 1:
+                return False, '当前激活的配置不能删除，请先切换'
+            cursor.execute('DELETE FROM llm_configs WHERE id = ?', (config_id,))
+            conn.commit()
+            return True, '已删除'
+
+    def set_active_llm_config(self, config_id):
+        """切换激活的大模型配置"""
+        with self.get_connection() as conn:
+            cursor = conn.cursor()
+            # 先全部取消激活
+            cursor.execute('UPDATE llm_configs SET is_active = 0, updated_at = CURRENT_TIMESTAMP')
+            # 设置新的激活
+            cursor.execute('UPDATE llm_configs SET is_active = 1, updated_at = CURRENT_TIMESTAMP WHERE id = ?', (config_id,))
+            conn.commit()
+            return cursor.rowcount > 0
+
+
 # 全局数据库实例
 db = Database()