UX - Live Mouse Coordinates in Status Bar

[DevGeniusCode]

Title:
UX: Display Live Mouse Coordinates in Status Bar

Description:
To assist users in precisely aligning elements and tracing over reference images, we need a live readout of the mouse cursor's X and Y coordinates relative to the canvas (Scene coordinates). This should match the behavior of the original SAGE GUI Editor.

Tasks:

• Ensure the main application window has a QStatusBar active at the bottom.
• Enable mouse tracking on the main QGraphicsView widget by calling setMouseTracking(True).
• Intercept mouse movements (either by overriding mouseMoveEvent in the view or using an event filter).
• Convert the viewport coordinates to scene coordinates using mapToScene(event.pos()).
• Format the coordinates into a readable string (e.g., X: 382, Y: 139) and push this text to a permanent or temporary widget on the right side of the status bar.

Acceptance Criteria:

• Moving the mouse across the central canvas updates the status bar coordinates instantly.
• The displayed coordinates accurately reflect the 800x600 (or current scale) internal coordinate system, not the physical monitor pixels.
• When the mouse leaves the canvas area, the coordinates either clear or show the last known position smoothly without crashing.