feedback5: merge W5AD — language packs as the first type of a generic content pack: a language is a file in the language folder (public/i18n/<code>.json with a _meta manifest, optional data/i18n/<code>.json) or a pack folder (packs/<id>/pack.json); the server lists them live at /packs/index.json, the menu shows every pack, strings fall back pack → base → declared fallback → Chinese, broken placeholders are skipped, plurals follow Intl.PluralRules (zh / en unchanged); tools i18n.mjs template / check, packs.mjs list / index, build-i18n --lang ja|ko|zh-TW; the release zips ship packs/ and packs/index.json; docs/PACKS.md, docs/I18N.md §5; §25.16 for now (renumbered next); golden: unchanged vs feedback5; vs W5AD exactly what feedback5 changed since f1df0d3 (CB5's 18 bot matches, CB2's roster 13 / bonds 7 / fields 6, CB4's roster-016 / 7 boss fields / standin-04/06/08 / diy-028/124)

No conflicts outside docs/history/0.2.0.md; the §25 intro keeps one sentence per stream (W5AD's line that also named
the hotkeys' §25.15 joined to CB4's).

Gate: non-browser suites 4981 / 4981 (test/i18n-packs 12 new, test/package 1 new), npm run golden ok,
test/golden.test.js 9 / 9, lint 0 errors, check:imports ok, typecheck ok, docs-consistency + docs-paths 31 / 31.

public/css/screens/title.css

@@ -192,7 +192,7 @@
   animation: rise-in 600ms 140ms var(--ease-out) backwards;
 }
 .title-cn__colon { color: #f4f6f5; }
-/* English title (ui/lang.js): the display face, smaller so "Stronghold Protocol: Alliance" fits one line */
+/* a title in an alphabetic script (English …; screens/title.js): the display face, smaller so "Stronghold Protocol: Alliance" fits one line */
 .title-cn--latin { font-family: var(--font-display); font-size: .6rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; white-space: nowrap; }
 .title-cn em { font-style: normal; color: var(--mint-500); text-shadow: 0 0 .26rem rgba(23, 249, 183, .45); }
 .title-tag {
@@ -243,10 +243,12 @@
 .title-invite .icon { width: .2rem; height: .2rem; }
 .title-invite b { font-size: .2rem; letter-spacing: .2em; color: #ffd08a; }
 .title-conn { display: flex; align-items: center; justify-content: center; gap: .1rem; min-height: .32rem; font-size: .14rem; color: var(--text-lo); }
-/* language switch (中文 | English) in the top-right corner */
+/* language menu (中文 | English | …, ui/lang.js) in the top-right corner; more than four languages make it a list */
 .title-lang { display: inline-flex; margin-bottom: .1rem; }
 .title-lang button { min-width: .74rem; height: .3rem; font-size: .14rem; cursor: pointer; }
-html[data-lang="en"] .title-login .btn--xl { letter-spacing: .3em; }
+.lang-select select { height: .38rem; min-width: 1.6rem; padding: 0 .12rem; background: #0a0d0c; border: 0; color: var(--text-hi); font-size: .16rem; cursor: pointer; }
+.title-lang.lang-select select { height: .3rem; font-size: .14rem; }
+html[data-script="alphabetic"] .title-login .btn--xl { letter-spacing: .3em; }
 .title-conn .ping { height: .26rem; font-size: .15rem; }
 
 .title-foot {