feat(landing): join-flow rework, player rosters, account page, mod list

Execute plan/18 (WS1-6) + plan/17.

- WS1: homepage join = 3 steps off packwiz (register -> UlicraftLauncher
  -> join); per-OS downloads from a synced launcher-manifest.json (schema +
  example committed); Fjord moved to its own /fjord page. Drop packwizUrl.
- WS2/3: mc-status gains an isolated /players endpoint (admin login ->
  Drasl GET /players, own client+TTL+token cache, never blocks the status
  path); online + registered rosters render shared name+avatar tiles;
  AVATAR_MODE env (default headiso).
- WS4: /account skin CRUD via browser-direct Drasl (login -> upload ->
  reset), in-memory token, players[0]; register relinks "Manage it here".
- WS5: footer link to status.${BASE_DOMAIN} in every footer.
- WS6: tooling/build-modlist.py generates mods.json + extracted logos from
  the distribution forgemods; ModList.astro renders a flat list; stat tile
  fed from the count.

Manifest/mods loaders read at build with a process.cwd() fallback (the
import.meta.url-only path does not resolve in Astro's bundled build).

New env: AVATAR_MODE, DRASL_ADMIN_USERNAME, DRASL_ADMIN_PASSWORD (mc-status
only). Generated mods.json / launcher-manifest.json / logos are gitignored;
.example.json files document the shapes. Build: 12 pages; mc-status builds.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -20,5 +20,17 @@ landing/node_modules/
 landing/.astro/
 landing/dist/
 
+# launcher download manifest: produced/synced by the custom-launcher release
+# flow (the .example.json is committed as the documented shape)
+landing/src/data/launcher-manifest.json
+
+# mod catalogue + extracted logos: generated by tooling/build-modlist.py from
+# the distribution forgemods (the .example.json is committed as the empty shape)
+landing/src/data/mods.json
+landing/public/mod-logos/
+
+# compiled mc-status binary (built into the image; stray local `go build` output)
+docker/mc-status/mc-status
+
 # Let's Encrypt certs + private keys (issued by tooling/issue-letsencrypt.sh)
 certs/