Add sleep detection (macOS)

• Recording automatically stops when you close your laptop lid or put the system to sleep
• Prevents unintended recording while the system is inactive

Enhanced context menu for calendar events

• Events with notes now show: "Open in new tab", "Reveal in Finder", and "Delete completely"
• "Delete completely" removes both the event and all associated session data
• Ignoring events without notes now automatically cleans up empty sessions

Fix credentials being lost after app restart

• Session tokens now refresh automatically in the background
• Switched to browser-native lock mechanism, eliminating spurious timeout warnings

Fix memory growth during long recordings

• Removed audio data accumulation that could consume ~19GB/day of memory
• Added bounded audio channels with backpressure to prevent unbounded memory growth

Fix Ollama model list not loading for remote instances

• Model list now populates correctly when connecting to Ollama via Tailscale or other remote setups

Fix starting recording from enhanced view

• Clicking "Start listening" while viewing a summary now correctly switches to raw view

Improved timeline event display

• Events now use end time to determine past/future visibility
• Event start times are displayed in the timeline sidebar