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/i18n/en.json

@@ -1,4 +1,18 @@
 {
+  "_meta": {
+    "type": "lang",
+    "lang": "en",
+    "name": "English",
+    "englishName": "English",
+    "version": "0.2.0",
+    "app": ">=0.2.0",
+    "authors": [
+      "@YuriRestia (GitHub PR #70, the seed of these strings)",
+      "the Stronghold Protocol contributors"
+    ],
+    "credits": "Game texts (data/i18n/en.json): the official EN client data (© Hypergryph / Yostar) via ArknightsAssets/ArknightsGamedata.",
+    "complete": true
+  },
   "_about": "English UI strings: Chinese msgid → English (shared/i18n.js t(); docs/I18N.md). Placeholders {name} and {n|one|other} as in the msgid; a 'context::msgid' key is a tc() variant. Seeded from GitHub PR #70 (branch en-translation) by @YuriRestia, reused with credit (NOTICE.md). Game texts are not here: data/i18n/en.json (tools/build-i18n.mjs).",
   "你已在其他同盟中，请先离开当前同盟": "You are already in another Alliance. Leave it first.",
   "你已不在该同盟中": "You are no longer in this Alliance",
@@ -116,6 +130,7 @@
   "请输入博士代号": "Please enter your Doctor callsign",
   "卫戍协议": "Stronghold Protocol",
   "盟约": "Alliance",
+  "卫戍协议：盟约 · STRONGHOLD PROTOCOL": "Stronghold Protocol: Alliance · Web Simulation",
   "调配资金与干员，与同伴协同布防，抵御多波次进攻，直至击败敌方领袖。": "Allocate Funds and Operators, coordinate defenses with your allies, hold off wave after wave, and defeat the Enemy Leader.",
   "收到同盟邀请": "Alliance invite received",
   "· 输入代号后将自动加入": "· You'll join automatically after entering your callsign",