config: allow full property usage in app function and improve type consistency

Added support for all properties in the `app` function configuration and ensured consistent type definitions for `BkndConfig`. Updated `makeConfig` function to reflect these changes and added relevant unit tests.

app/__test__/adapter/adapter.test.ts

@@ -1,4 +1,4 @@
-import { expect, describe, it, beforeAll, afterAll } from "bun:test";
+import { expect, describe, it, beforeAll, afterAll, mock } from "bun:test";
 import * as adapter from "adapter";
 import { disableConsoleLog, enableConsoleLog } from "core/utils";
 import { adapterTestSuite } from "adapter/adapter-test-suite";
@@ -29,6 +29,31 @@ describe("adapter", () => {
       });
    });
 
+   it("allows all properties in app function", async () => {
+      const called = mock(() => null);
+      const config = await adapter.makeConfig(
+         {
+            app: (env) => ({
+               connection: { url: "test" },
+               config: { server: { cors: { origin: "test" } } },
+               options: {
+                  mode: "db",
+               },
+               onBuilt: () => {
+                  called();
+                  expect(env).toEqual({ foo: "bar" });
+               },
+            }),
+         },
+         { foo: "bar" },
+      );
+      expect(config.connection).toEqual({ url: "test" });
+      expect(config.config).toEqual({ server: { cors: { origin: "test" } } });
+      expect(config.options).toEqual({ mode: "db" });
+      await config.onBuilt?.(null as any);
+      expect(called).toHaveBeenCalled();
+   });
+
    adapterTestSuite(bunTestRunner, {
       makeApp: adapter.createFrameworkApp,
       label: "framework app",

app/src/adapter/index.ts

@@ -13,9 +13,9 @@ import type { AdminControllerOptions } from "modules/server/AdminController";
 import type { Manifest } from "vite";
 
 export type BkndConfig<Args = any> = CreateAppConfig & {
-   app?: CreateAppConfig | ((args: Args) => MaybePromise<CreateAppConfig>);
+   app?: Omit<BkndConfig, "app"> | ((args: Args) => MaybePromise<Omit<BkndConfig<Args>, "app">>);
-   onBuilt?: (app: App) => Promise<void>;
+   onBuilt?: (app: App) => MaybePromise<void>;
-   beforeBuild?: (app: App, registries?: typeof $registries) => Promise<void>;
+   beforeBuild?: (app: App, registries?: typeof $registries) => MaybePromise<void>;
    buildConfig?: Parameters<App["build"]>[0];
 };
 
@@ -34,7 +34,7 @@ export type DefaultArgs = {
 export async function makeConfig<Args = DefaultArgs>(
    config: BkndConfig<Args>,
    args?: Args,
-): Promise<CreateAppConfig> {
+): Promise<Omit<BkndConfig<Args>, "app">> {
    let additionalConfig: CreateAppConfig = {};
    const { app, ...rest } = config;
    if (app) {