joryirving/windowstead #52: span dock across full screen edge instead of floating panel

[itsmiso-ai]

Fixes #52. The dock window now spans the full usable screen edge: bottom mode gets full width, side mode gets full height. Tile-first board geometry is preserved — only the outer window extent is adjusted to behave like a true desktop dock rather than a floating panel.

[smurf-bot]

✅ Automated recommendation: APPROVE

Analysis engine: MiniMax-M2.7@https://api.minimax.io/v1

Recommendation: Approve

This PR implements a targeted fix for issue #52, making the dock window span the full screen edge it anchors to rather than behaving like a floating panel.

Change Summary

In apply_dock_position(), after tile-first sizing is calculated, the code now expands the dock to span its anchored edge:

• Bottom mode: Full screen width (dock_size.x = usable_rect.size.x)
• Side modes: Full screen height (dock_size.y = usable_rect.size.y)

Standards Compliance

Requirement	Status
Tile-first dock sizing preserved	✅
Bottom dock shallow and wide	✅
Side dock modest width	✅
Distinct bottom vs vertical behavior	✅

Quality

• Minimal scope: Single file, 5-line addition
• Clear intent: Comment explains the behavior immediately
• Low risk: Padding is preserved on the non-spanned dimension
• No regressions: Tile metrics calculated first; only outer extent adjusted

Unknowns

None — evidence is complete and the implementation follows established patterns in the codebase.