Fixed
- Wrong colors on external monitors (editor + saved files) — captured screenshots are now normalized to sRGB at capture time instead of preserving the monitor's native ICC profile. Some external monitors (e.g. ViewSonic VX4380) have profiles that don't round-trip correctly through AppKit's rendering pipeline. Converting to sRGB immediately after ScreenCaptureKit returns the raw image ensures correct colors everywhere.
- Last used tool not persisted across app restarts — the selected annotation tool (pencil, arrow, etc.) now survives app restarts via UserDefaults.