Refactor asset handling and authentication logic (for node)

Updated asset path configuration and server-side logic to standardize asset serving. Introduced `shouldSkipAuth` to bypass authentication for asset requests. Added test coverage for the new asset path handling logic.

app/__test__/auth/middleware.spec.ts

@@ -0,0 +1,9 @@
+import { describe, expect, it } from "bun:test";
+import { shouldSkipAuth } from "../../src/auth/middlewares";
+
+describe("auth middleware", () => {
+   it("should skip auth on asset paths", () => {
+      expect(shouldSkipAuth({ req: new Request("http://localhost/assets/test.js") })).toBe(true);
+      expect(shouldSkipAuth({ req: new Request("http://localhost/") })).toBe(false);
+   });
+});