Yapper Studio 0.0.21

Editor reliability release:

• Keeps the final corrected take during 1-click editing, including partial sentence-tail retakes.
• Removes dead-air clip islands and trims silence edges more tightly.
• Shows removed pauses as restorable transcript items.
• Uses subtler clip borders and improved responsive/tall preview layouts.
• Adds macOS microphone permission recovery for voice idea capture.

Validated against the DJI reference recording, the full web test/build suite, and native desktop tests.