Add continuous monitoring for pre-lock conditions

[marcoscaceres]

• Added monitoring step in 'apply orientation lock' algorithm
• Ensures pre-lock conditions (fullscreen, installed app status) are continuously checked
• Automatically runs 'fully unlock' steps when conditions no longer hold
• Provides general catch-all beyond existing Fullscreen API integration
• Improves user experience and security by preventing stale orientation locks

Closes #243

The following tasks have been completed:

• Modified Web platform tests (link to pull request)

Implementation commitment:

• WebKit (https://bugs.webkit.org/enter_bug.cgi)
• Chromium (https://bugs.chromium.org/p/chromium/issues/detail?id=)
• Gecko (https://bugzilla.mozilla.org/show_bug.cgi?id=)

---

Preview | Diff

[Copilot]

Pull Request Overview

Adds a continuous monitoring step to the “apply orientation lock” algorithm so that pre-lock conditions are re-checked and the orientation lock is fully unlocked when those conditions cease to hold. This aims to prevent stale orientation locks outside of the Fullscreen API hooks.

• Add a monitoring step to run “fully unlock” when pre-lock conditions no longer hold
• Integrate the step to run in parallel with the algorithm’s processing

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}