Final phase of the hero canvas editor (see HERO_EDITOR.md) — v1 complete.
- element tray adds moon, badge, and image; property panels:
- moon: size / glow / color
- badge: text / background / text color / corner radius
- image: upload (/admin/uploads, >1MB warning) / width% / alt
- corner resize handle on selected elements (image→width%, moon→size,
text_block→box width)
- 8px snap-grid toggle with a faint canvas grid overlay; drag snaps when on
- HeroElement: image element shows an "Upload an image" placeholder until a
source is set (a srcless image never ships live)
Verified in-browser: all five element types add + edit; moon resized 64->104px
via the handle; snap grid overlays; a published moon + badge render on the live
portal; no console errors.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>