Improve polygon vertex dragging responsiveness in edit mode

[justFadel19]

This pull request includes a fix in the CanvasManager class within web/js/canvas.js. The change ensures that vertex dragging is properly handled in edit mode when interacting with polygons.

Fix for edit mode behavior:

• Added logic to check for a vertex under the mouse when in edit mode and editing a polygon. If a vertex is found, the dragging operation starts, and normal actions are bypassed. This improves the user experience by prioritizing vertex manipulation during polygon editing.

[Copilot]

Pull Request Overview

This PR adds logic to prioritize polygon vertex dragging when in edit mode, ensuring that clicks on vertices initiate drag operations instead of triggering standard actions.

• Intercepts left-clicks in edit mode to check for and start vertex drags
• Bypasses normal click handling when a vertex drag begins
• Adjusts method closing braces and indentation around handleMouseMove

Comments suppressed due to low confidence (3)

web/js/canvas.js:561

• These console.log statements appear to be leftover debug logs. Consider removing them or using a dedicated debug-level logger so production output remains clean.

console.log('Is editing polygon:', this.isEditingPolygon);

web/js/canvas.js:585

• The closing brace and handleMouseMove declaration are merged together, impacting readability. Please split and indent properly so each block and method signature stands on its own line.

}    }    handleMouseMove(e) {

web/js/canvas.js:564

• The new vertex drag logic isn't covered by existing tests. Consider adding unit or integration tests for getVertexAtPoint and startVertexDrag in edit mode to prevent regressions.

// --- FIX: Always check for vertex under mouse in edit mode ---

[Copilot]

Using a truthiness check on editingAnnotationId will skip IDs equal to 0. Use an explicit null/undefined check (e.g., this.editingAnnotationId != null) to handle all valid numeric IDs.

Suggested change

	this.editingAnnotationId
	this.editingAnnotationId != null

[AhmedFatthy1040]

LGTM