## 1. Implementation
- [x] 1.1 Add configurable abort hotkey with launch-profile registration.
- [x] 1.2 Add recording abort operation/API that stops active capture and transcription.
- [x] 1.3 Delete meeting artifacts and linked screenshot attachments for aborted runs.
- [x] 1.4 Ensure abort does not transition to summarizing or invoke the summary pipeline.

## 2. Verification
- [x] 2.1 Cover abort deleting artifacts and skipping summary.
- [x] 2.2 Cover abort hotkey registration.
- [x] 2.3 Run relevant tests and strict OpenSpec validation.