Release 1.11.0+53

Fixes:
* Fix potential API key leakage in Gemini API error responses
* Fix crash when timer is deleted between scheduling and execution
* Fix deadlock and memory leak in notification handler
* Fix TOCTOU race condition in AudioPlayer
* Fix file corruption in copyFile writing full buffer instead of bytes read
* Fix pagination bug and answer voice data loss
* Fix off-by-one substring in media import filename extraction
* Fix temp file not cleaned up on AudioRecorder initialization failure
* Enable core library desugaring for AI module

Feature:
* Add answer voice recording support to card detail page
* Add Save & Add Another button for streamlined card creation
