feat(M05-A): 建立统一支付领域与幂等回调

backend/src/config.ts

@@ -16,6 +16,7 @@ const configSchema = z.object({
   QIPAI_ACCESS_TOKEN_TTL_SECONDS: z.coerce.number().int().min(60).max(86400).default(900),
   QIPAI_SESSION_TTL_SECONDS: z.coerce.number().int().min(300).max(2592000).default(604800),
   QIPAI_WECHAT_APP_SECRETS: z.string().default('{}'),
+  QIPAI_TEST_PAYMENT_ENABLED: z.enum(['true', 'false']).default('false'),
   QIPAI_MQTT_URL: z.string().url().default('mqtt://101.42.38.246:1883'),
   QIPAI_MQTT_USERNAME: z.string().default(''),
   QIPAI_MQTT_PASSWORD: z.string().default('')
@@ -53,6 +54,10 @@ export function loadConfig(env: NodeJS.ProcessEnv = process.env) {
       sessionTtlSeconds: parsed.QIPAI_SESSION_TTL_SECONDS,
       wechatAppSecretsJson: parsed.QIPAI_WECHAT_APP_SECRETS
     },
+    payment: {
+      testAdapterEnabled: parsed.NODE_ENV !== 'production'
+        && parsed.QIPAI_TEST_PAYMENT_ENABLED === 'true'
+    },
     mqtt: {
       url: parsed.QIPAI_MQTT_URL,
       usernameConfigured: parsed.QIPAI_MQTT_USERNAME.length > 0,