Add Playlists section; clean up build artifacts from repo

- Wire Playlists star in index.html → Playlists/playlists.html
- Hub page: Aladin font, dynamic cards via build.py injection, no back-link
- 4 playlist pages: eclectica-experimenti, daydreamsoftime, soosfynwyn, theelfladymadeusdoit
- build.py: scans folder, extracts title+track count, regenerates hub cards in place
- Remove 21 tracked CSVs (moved with PlaylistPirate to ToolsnToys)
- Untrack Images/GEMINI.md, GEMINI-FIX.md, script-guide.md (agent artifacts)
- .gitignore: global rules for GEMINI*.md, HANDOVER.md, script-guide.md; Playlists build dirs

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

index.html

@@ -693,7 +693,7 @@ body::after {
     { 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: 'Images/images.html' },
-    { id: 'playlists',    label: 'Playlists',    sign: '≡',  x: 78, y: 50, href: '' },
+    { id: 'playlists',    label: 'Playlists',    sign: '≡',  x: 78, y: 50, href: 'Playlists/playlists.html' },
     { id: 'watchlists',   label: 'Watchlists',   sign: '視',  x: 22, y: 66, href: '' },
     { id: 'toolsntoys',   label: 'ToolsnToys',   sign: '⚙',  x: 50, y: 72, href: '' },
     { id: 'creatorlists', label: 'Creatorlists', sign: '創',  x: 75, y: 70, href: '' }