新增支付服务接入与订单收银台

新增支付应用、API Key 与外部产品订单接口

接入微信 Native 下单、二维码收银台与支付结果回调

新增后台支付订单与回调投递页面

补齐 SpacetimeDB 支付表、生成绑定、OpenAPI 与使用说明

docs/openapi/genarrative-external-v1.openapi.json

@@ -43,6 +43,10 @@
     {
       "name": "Agent Integration",
       "description": "远程 MCP、OpenAPI 和完整 Skill 包发现"
+    },
+    {
+      "name": "Payment",
+      "description": "平台统一收款与 Web 收银台"
     }
   ],
   "paths": {
@@ -1614,6 +1618,52 @@
           }
         }
       }
+    },
+    "/api/external/v1/payment/orders": {
+      "post": {
+        "tags": ["Payment"],
+        "operationId": "createExternalPaymentOrder",
+        "summary": "创建支付订单并返回收银台地址",
+        "description": "使用支付应用 API Key 创建平台统一收款订单。支付金额按整数分传入；支付成功必须以平台通知或服务端查单为准。",
+        "security": [{"PaymentApiKey": []}],
+        "parameters": [{"$ref": "#/components/parameters/IdempotencyKey"}],
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {"$ref": "#/components/schemas/PaymentOrderCreateRequest"}
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "支付订单与收银台信息",
+            "content": {"application/json": {"schema": {"$ref": "#/components/schemas/PaymentOrderCreateResponse"}}}
+          },
+          "400": {"$ref": "#/components/responses/BadRequest"},
+          "401": {"$ref": "#/components/responses/Unauthorized"},
+          "403": {"$ref": "#/components/responses/Forbidden"},
+          "502": {"$ref": "#/components/responses/UpstreamError"}
+        }
+      }
+    },
+    "/api/external/v1/payment/orders/{orderId}": {
+      "get": {
+        "tags": ["Payment"],
+        "operationId": "getExternalPaymentOrder",
+        "summary": "查询支付订单",
+        "security": [{"PaymentApiKey": []}],
+        "parameters": [{"name": "orderId", "in": "path", "required": true, "schema": {"type": "string"}}],
+        "responses": {
+          "200": {
+            "description": "支付订单",
+            "content": {"application/json": {"schema": {"$ref": "#/components/schemas/PaymentOrderCreateResponse"}}}
+          },
+          "401": {"$ref": "#/components/responses/Unauthorized"},
+          "403": {"$ref": "#/components/responses/Forbidden"},
+          "404": {"$ref": "#/components/responses/NotFound"}
+        }
+      }
     }
   },
   "components": {
@@ -1622,6 +1672,11 @@
         "type": "http",
         "scheme": "bearer",
         "bearerFormat": "tnr_sk"
+      },
+      "PaymentApiKey": {
+        "type": "http",
+        "scheme": "bearer",
+        "bearerFormat": "tnr_pay"
       }
     },
     "parameters": {
@@ -1747,6 +1802,47 @@
       }
     },
     "schemas": {
+      "PaymentOrderCreateRequest": {
+        "type": "object",
+        "required": ["merchantOrderId", "title", "amountCents"],
+        "properties": {
+          "merchantOrderId": {"type": "string", "minLength": 1, "maxLength": 96},
+          "title": {"type": "string", "minLength": 1, "maxLength": 128},
+          "items": {"type": "array", "items": {"type": "object", "additionalProperties": true}},
+          "amountCents": {"type": "integer", "minimum": 1},
+          "currency": {"type": "string", "default": "CNY"},
+          "provider": {"type": "string", "enum": ["wechat_native"], "default": "wechat_native"}
+        },
+        "additionalProperties": false
+      },
+      "PaymentOrder": {
+        "type": "object",
+        "required": ["orderId", "appId", "merchantOrderId", "title", "items", "amountCents", "currency", "provider", "checkoutToken", "status", "checkoutUrl", "createdAt", "expiresAt", "updatedAt"],
+        "properties": {
+          "orderId": {"type": "string"},
+          "appId": {"type": "string"},
+          "merchantOrderId": {"type": "string"},
+          "title": {"type": "string"},
+          "items": {"type": "array", "items": {"type": "object", "additionalProperties": true}},
+          "amountCents": {"type": "integer", "minimum": 1},
+          "currency": {"type": "string"},
+          "provider": {"type": "string", "enum": ["wechat_native"]},
+          "providerTradeNo": {"type": ["string", "null"]},
+          "checkoutToken": {"type": "string"},
+          "status": {"type": "string", "enum": ["pending", "paying", "paid", "expired", "closed", "refunded"]},
+          "checkoutUrl": {"type": "string"},
+          "providerQrCode": {"type": ["string", "null"]},
+          "createdAt": {"type": "string", "format": "date-time"},
+          "expiresAt": {"type": "string", "format": "date-time"},
+          "paidAt": {"type": ["string", "null"], "format": "date-time"},
+          "updatedAt": {"type": "string", "format": "date-time"}
+        }
+      },
+      "PaymentOrderCreateResponse": {
+        "type": "object",
+        "required": ["order"],
+        "properties": {"order": {"$ref": "#/components/schemas/PaymentOrder"}}
+      },
       "ExternalEditorProjectCreateRequest": {
         "type": "object",
         "properties": {