renderVersion bumps on every pan/zoom/hover — it's the canvas redraw signal.
sceneVersion only bumps when the scene graph actually changes.
Panels (properties, layers, context menu, pages, export preview) now
depend on sceneVersion, so they don't re-render during navigation.
Add @/ → src/ alias in vite.config.ts and tsconfig.json.
Rewrite all ../ imports across 32 files to use @/ paths.
Same-directory ./ imports kept as-is.
