[Improved, Fixed] Smoother web call microphone setup

Improvements

• Added browser-aware guidance so candidates on iOS Chrome now see the correct “Chrome → Microphone” steps instead of Safari-only instructions
• Automatically detects when an interview is opened inside an in-app webview (Gmail, Facebook, LinkedIn, TikTok, etc.) and proactively suggests opening the link in the device’s full browser
• New amber "Open in Safari / Open in browser" card with a one-tap "Copy interview link" button makes switching browsers effortless for candidates
• A built-in cooldown prevents rapid, repeated tap-throughs, reducing accidental duplicate call attempts and keeping the retry experience responsive
• Behind-the-scenes cleanup now frees abandoned call slots instantly, cutting down on “call already in use” errors and improving overall call reliability

Fixes

• Corrected an issue that showed the wrong microphone permission steps to iOS Chrome users, preventing them from enabling audio
• Resolved dead-end flows for candidates who launched interviews from the Google app or other embedded browsers; they now receive clear next steps
• Eliminated duplicate “microphone denied” error messages caused by frantic tapping on the retry button
• Prevented occasional “too many calls” errors by cancelling stale call attempts and respecting temporary server rate limits