- New ScreenshotFrame: capture screen / load PNG, two-click bbox,
threaded template matching, editable preview grid for corrections
- ManualFrame kept as second tab for users who prefer typing counts
- capture.py: screen grab via mss (cross-platform)
- requirements: add mss>=6.0 for screen capture support
Closes the gap from v0.1.0 where users had to manually count
every slab — now they aim, click two corners, and edit any
mis-recognized cell.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
