docs(mods): sync docs to the 164-jar kitchen-sink pack

The pack grew 76 -> 164 jars (133 both / 31 client) without any doc
update. Create + ~18 addons filled the tech gap, ars_nouveau + ars_creo
the magic gap, and the full YUNG's/Moog's/TerraBlender set the worldgen
gap, which also resolved the ponderjs orphan.

- 17-mod-shortlist: rewritten around the current pack; gap doc marked
  done, remaining gaps narrowed to map mod, Necronomicon orphan, C2ME.
- 04-mods: jar counts updated; the 24/52 cutover split is now labelled
  historical alongside the current 31/133.
- CLAUDE.md: WS6 partly done, stale "65 default both" line dropped, and
  the ~50-100 mod ceiling flagged as knowingly exceeded in both places.
  MAX_MEMORY 10G was sized for that old assumption - noted for re-check.
- 18-landing-rework: mods.json count 76 -> 164, "50+" stat tile noted
  stale.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plan/18-landing-rework.md

@@ -158,7 +158,7 @@ offline) reads `$DISTRIBUTION_WEB_ROOT/servers/ulicraft-1.21.1/forgemods/require
 ```json
 {
   "schemaVersion": 1,
-  "count": 76,
+  "count": 164,
   "mods": [
     { "id": "jei", "name": "Just Enough Items (JEI)", "version": "19.27.0.340",
       "authors": "mezz", "description": "…", "logo": "/mod-logos/jei.png" }
@@ -168,6 +168,8 @@ offline) reads `$DISTRIBUTION_WEB_ROOT/servers/ulicraft-1.21.1/forgemods/require
 
 `ModList.astro` (new) imports `mods.json` → flat grid (logo + name + version). The
 homepage stat tile (`site.ts` `stats[0].key "50+"`) is fed from `mods.json.count`.
+(The hardcoded `"50+"` fallback is stale — the pack is 164 jars as of 2026-07-20;
+bump it to `"150+"` when wiring the tile.)
 
 Tasks:
 - [ ] `tooling/build-modlist.py` (jar parse + logo extract + `mods.json`).