[Bug]: Integrated browser preview blocks OAuth popup authentication

[rodrigoGA]

Before submitting

• I searched existing issues and did not find a duplicate.
• I included enough detail to reproduce or investigate the problem.

Area

apps/desktop

Steps to reproduce

1. Start a local web application that authenticates with Firebase using:

   await signInWithPopup(auth, new GoogleAuthProvider())

2. Open the application in T3 Code's integrated browser preview.
3. Click the Google sign-in button.
4. Observe that no authentication window opens and Firebase immediately reports auth/popup-blocked.
5. Open the same application in an external Chrome or Firefox window and repeat the action. The popup opens normally.

Expected behavior

T3 Code should open a controlled OAuth window and allow the authentication flow to complete.

Actual behavior

The OAuth window never opens and Firebase returns:

Firebase: Error (auth/popup-blocked).

The preview currently intercepts window.open(), attempts to load the URL in the existing WebContents, and returns { action: "deny" }, which Electron treats as cancellation of the requested window:

https://github.com/pingdotgg/t3code/blob/main/apps/desktop/src/preview/Manager.ts#L1358-L1365

Impact

Blocks work completely

Version or commit

T3 Code 0.0.33 (Linux AppImage)

Environment

fedora 44

Logs or stack traces

FirebaseError: Firebase: Error (auth/popup-blocked).

Screenshots, recordings, or supporting files

No response

Workaround

No response