Add Images section — hub + 4 collection galleries, wire nav star

- Images/images.html: hub page linking all 4 collections
- Images/wayback.html, nomad-soul.html, myster-wizzard.html, exopraxist.html: collection galleries
- 429 thumbnails (360px) committed across 4 collections
- Gallery renders from baked filename arrays (no on-load fetch)
- Lightbox lazy-fetches FileBrowser for full-res on click, falls back to thumbnail
- .gitignore: allow Images/*/thumbnails/, anchor /GEMINI.md to root only, add .venv/
- index.html: wire Images star node to Images/images.html

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

index.html

@@ -692,7 +692,7 @@ body::after {
     { id: 'writings',     label: 'Writings',     sign: '文',  x: 25, y: 22, href: '' },
     { id: 'videos',       label: 'Videos',       sign: '映',  x: 68, y: 18, href: 'Videos/index.html' },
     { id: 'music',        label: 'Music',        sign: '♬',  x: 12, y: 44, href: '' },
-    { id: 'images',       label: 'Images',       sign: '絵',  x: 55, y: 35, href: '' },
+    { id: 'images',       label: 'Images',       sign: '絵',  x: 55, y: 35, href: 'Images/images.html' },
     { id: 'playlists',    label: 'Playlists',    sign: '≡',  x: 78, y: 50, href: '' },
     { id: 'watchlists',   label: 'Watchlists',   sign: '視',  x: 22, y: 66, href: '' },
     { id: 'toolsntoys',   label: 'ToolsnToys',   sign: '⚙',  x: 50, y: 72, href: '' },