卫戍协议：盟约 web remake — initial import

Online co-op browser remake of Arknights' Stronghold Protocol: Alliance
(client-simulated combat, official waves/bonds/items/strategies, 3D board,
facing wheel, operator loadout, official emotes, deployment scripts).

server/sim/content/bonds.js

@@ -0,0 +1,40 @@
+// server/sim/content/bonds.js — the 23 bonds (盟约), battle side + prep side (DESIGN §7, research 02).
+//
+// Entry point imported by content/index.js. The work is split into two submodules that each export
+// install(battle) / registerMeta(registry):
+//   bonds/core.js    8 core bonds  炎 萨尔贡 维多利亚 谢拉格 拉特兰 阿戈尔 叙拉古 卡西米尔
+//   bonds/addon.js   15 add-on bonds 精准 迅捷 灵巧 奥术 坚守 助力 远见 奇迹 投资人 突袭 不屈 调和 协防干员 独行 绝技
+// plus support/meta.js (shared prep→battle `contentInfo`). Parts are loaded with guarded dynamic imports and run in
+// isolation: one failing part never disables the others (the first error is re-thrown afterwards so
+// content/index.js records it in battle.errors / the server log).
+// Membership (own bonds, 变形同构体 grants, 调和 enjoying active core bonds) lives in support/index.js.
+
+async function load(path) {
+  try {
+    return await import(path);
+  } catch (e) {
+    console.error(`[content] failed to load ${path}: ${e && e.stack ? e.stack.split('\n').slice(0, 3).join(' | ') : e}`);
+    return {};
+  }
+}
+
+const [core, addon, supportMeta] = await Promise.all([load('./bonds/core.js'), load('./bonds/addon.js'), load('./support/meta.js')]);
+const PARTS = Object.freeze([['bonds/core', core], ['bonds/addon', addon]]);
+
+function runAll(fnName, arg, pre = null) {
+  let first = null;
+  if (pre) { try { pre(arg); } catch (e) { first = first ?? e; } }
+  for (const [name, mod] of PARTS) {
+    if (typeof mod[fnName] !== 'function') continue;
+    try { mod[fnName](arg); } catch (e) {
+      if (!first) { first = e; try { e.message = `${name}.${fnName}: ${e.message}`; } catch { /* frozen */ } }
+    }
+  }
+  if (first) throw first;
+}
+
+export function install(battle) { runAll('install', battle); }
+
+export function registerMeta(registry) {
+  runAll('registerMeta', registry, typeof supportMeta.registerSupportMeta === 'function' ? supportMeta.registerSupportMeta : null);
+}