feat: 租户应用配置支持自定义参数

- 后端: TenantApp 模型添加 custom_configs 字段 (LONGTEXT)
- 后端: tenant_apps API 支持自定义配置的增删改查
- 前端: 应用订阅编辑对话框增加自定义配置编辑区域
- 支持 key-value-备注 三字段结构
- value 使用 textarea 支持超长文本（如提示词）

backend/app/models/tenant_app.py

@@ -23,6 +23,10 @@ class TenantApp(Base):
     # 功能权限
     allowed_tools = Column(Text)  # JSON 数组
     
+    # 自定义配置（JSON 数组）
+    # [{"key": "industry", "value": "medical_beauty", "remark": "医美行业"}, ...]
+    custom_configs = Column(Text)
+    
     status = Column(SmallInteger, default=1)
     created_at = Column(TIMESTAMP, default=datetime.now)
     updated_at = Column(TIMESTAMP, default=datetime.now, onupdate=datetime.now)

backend/app/models/tool_config.py

@@ -1,21 +1,21 @@
-"""租户工具配置模型"""
-from datetime import datetime
-from sqlalchemy import Column, Integer, String, Text, SmallInteger, TIMESTAMP
-from ..database import Base
-
-
-class ToolConfig(Base):
-    """租户工具配置表"""
-    __tablename__ = "platform_tool_configs"
-    
-    id = Column(Integer, primary_key=True, autoincrement=True)
-    tenant_id = Column(String(50), nullable=False, comment="租户ID")
-    tool_code = Column(String(50), nullable=True, comment="工具代码（NULL 表示租户级共享配置）")
-    config_type = Column(String(30), nullable=False, comment="配置类型：datasource / jssdk / webhook / params")
-    config_key = Column(String(100), nullable=False, comment="配置键名")
-    config_value = Column(Text, comment="配置值（明文或加密）")
-    is_encrypted = Column(SmallInteger, default=0, comment="是否加密存储")
-    description = Column(String(255), comment="配置说明")
-    status = Column(SmallInteger, default=1)
-    created_at = Column(TIMESTAMP, default=datetime.now)
-    updated_at = Column(TIMESTAMP, default=datetime.now, onupdate=datetime.now)
+"""租户工具配置模型"""
+from datetime import datetime
+from sqlalchemy import Column, Integer, String, Text, SmallInteger, TIMESTAMP
+from ..database import Base
+
+
+class ToolConfig(Base):
+    """租户工具配置表"""
+    __tablename__ = "platform_tool_configs"
+    
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    tenant_id = Column(String(50), nullable=False, comment="租户ID")
+    tool_code = Column(String(50), nullable=True, comment="工具代码（NULL 表示租户级共享配置）")
+    config_type = Column(String(30), nullable=False, comment="配置类型：datasource / jssdk / webhook / params")
+    config_key = Column(String(100), nullable=False, comment="配置键名")
+    config_value = Column(Text, comment="配置值（明文或加密）")
+    is_encrypted = Column(SmallInteger, default=0, comment="是否加密存储")
+    description = Column(String(255), comment="配置说明")
+    status = Column(SmallInteger, default=1)
+    created_at = Column(TIMESTAMP, default=datetime.now)
+    updated_at = Column(TIMESTAMP, default=datetime.now, onupdate=datetime.now)