chore: split dev and production deployment env

src/app.ts

@@ -55,6 +55,8 @@ export function createApp() {
 
     return ok({
       status: "ok",
+      environment: env.APP_ENV,
+      environmentLabel: env.APP_ENV_LABEL,
       database: "up",
       now: new Date().toISOString(),
     });

src/config/env.ts

@@ -7,6 +7,8 @@ const envSchema = z.object({
   NODE_ENV: z
     .enum(["local", "development", "test", "production"])
     .default("development"),
+  APP_ENV: z.enum(["local", "development", "test", "production"]).optional(),
+  APP_ENV_LABEL: z.string().min(1).optional(),
   PORT: z.coerce.number().int().positive().default(3000),
 
   DB_HOST: z.string().min(1),
@@ -30,4 +32,8 @@ if (!result.success) {
 }
 
 // 其他模块只从 env 读取已校验过的值，不再直接访问 process.env。
-export const env = result.data;
+export const env = {
+  ...result.data,
+  APP_ENV: result.data.APP_ENV ?? result.data.NODE_ENV,
+  APP_ENV_LABEL: result.data.APP_ENV_LABEL ?? result.data.NODE_ENV
+};