Implement hs.canvas

[cmsj]

No description provided.

[greptile-apps]

Greptile Summary

Implements the hs.canvas module, including canvas window lifecycle, element rendering, transforms, mouse interaction, drag-and-drop, image export, duplication, and module registration.

• Fixes shutdown cleanup by iterating over a snapshot of active canvases.
• Preserves the visual top-left corner during resizing.
• Aligns transformed bounds and hit testing with rendered geometry.
• Adds whole-canvas and element enter/exit event handling.
• Applies action, compositing, and transform behavior to special element types.
• Makes visual test artifacts portable by writing them to the system temporary directory.

Confidence Score: 5/5

The PR appears safe to merge with no outstanding actionable findings.

No new correctness or repository-rule violations remain. The six previous findings covering shutdown mutation, resize positioning, transformed hit testing, enter/exit delivery, special-element rendering, and developer-specific test paths were manually resolved without explanatory replies.

Important Files Changed

Filename	Overview
Hammerspoon 2/Modules/hs.canvas/Core/HSCanvas.swift	Defines the canvas API and lifecycle while correcting resize and transformed-bounds behavior.
Hammerspoon 2/Modules/hs.canvas/Elements/CanvasElementDrawing.swift	Implements element geometry and rendering, including unified action, compositing, and transform handling.
Hammerspoon 2/Modules/hs.canvas/Views/HSCanvasRenderView.swift	Renders transformed canvases and dispatches element and whole-canvas mouse events.
Hammerspoon 2/Modules/hs.canvas/HSCanvasModule.swift	Exposes canvas constants and creation while safely destroying active canvases during shutdown.
Hammerspoon 2Tests/IntegrationTests/HSCanvasElementDrawingTests.swift	Adds regression coverage for transformed hit testing and enter/exit transitions.
Hammerspoon 2Tests/IntegrationTests/HSCanvasIntegrationTests.swift	Adds regression coverage for top-left-preserving resize, transformed bounds, and multi-canvas shutdown.
Hammerspoon 2Tests/IntegrationTests/HSCanvasM5VisualAcceptanceTests.swift	Adds visual checks for special-element actions, compositing, and transforms while using portable artifact paths.

_{Reviews (2): Last reviewed commit: "Write canvas image tests into a sensible..." | Re-trigger Greptile}

[cmsj]

@greptile