fix: better support sigint while screencapture

[gmegidish]

Summary by CodeRabbit

• Bug Fixes

  • Improved broadcast extension startup with enhanced error handling and timeout management.
  • Clarified error messaging for broadcast-related failures.

• Chores

  • Added graceful server shutdown with signal handling for improved stability.
  • Enhanced logging for broadcast extension initialization and port-forwarding operations.

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[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Refactors iOS device broadcast button interaction into a dedicated helper method, introduces graceful server shutdown with signal handling, and updates the screencapture handler to accept HTTP request parameters for additional context during request processing.

Changes

Cohort / File(s)	Summary
iOS Device Kit Startup devices/ios.go	Extracts "Start Broadcast" button clicking logic into new clickStartBroadcastButton helper method with timeout handling and polling. Integrates helper into StartDeviceKit flow with enhanced verbose logging around broadcast extension startup. Normalizes error messaging and ensures port forwarder cleanup on failure.
Server Graceful Shutdown & Screencapture Handler server/server.go	Implements graceful server shutdown via goroutine with OS signal (SIGINT, SIGTERM) handling and 10-second timeout. Updates handleScreenCapture signature to accept *http.Request as first parameter for request-aware processing; propagates change to all call sites.

Possibly related PRs

• feat: ios avc without xctrunner without devicekit command #145 — Directly modifies the same StartDeviceKit flow and "Start Broadcast" button interaction logic in devices/ios.go that is being refactored here.

✨ Finishing touches

• 📝 Generate docstrings

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