新增：导出 / 导入干员调配 (#14)

docs/DESIGN.md

@@ -597,6 +597,8 @@ Official rule (bwiki 盟约, 更新公告 5114): before a match the player canno
 
 **UI:** a 干员调配 screen reachable from the lobby, room and briefing (INFO_CHECK): filter by tier/bond/class, per chess choose skill (icon, name, SP info, desc at Lv4 and Lv7) and elite module (official type icon from the local-client art when extracted (§13), else a lettered tile; name/type, stat bonus, trait/talent changes), 恢复默认, persisted; a 局内数值 section between the skills and the modules (普通 / 精锐 toggle, 精锐 first) draws the detail card's own stats block, 特性 and 天赋 for the chosen skill / module (§22.16); the chosen skill/module shown on shop cards and in the detail panel (a teammate's unit — 前往查看 in prep, 联防 / 最终攻势 fields, an observed battle — shows **its owner's** skill/module from its UnitInfo `skillIndex` / `moduleId`, `gameLogic.js unitLoadout`) — which also shows the stats, 特性, talents and attack range the unit fights with (`shared/loadoutRecord.js` `loadoutRecord` / `attackRangeGrid`, the same composition the sim's `getChess(id, loadout)` uses; the deploy wheel's range preview too) — the range it is deployed with: a selected passive range skill (引星棘刺 S3 3-9) and the 特性's permanent 攻击距离 (信仰搅拌机 SPT-Y +1) included, over all 1284 loadouts equal to the battle's range at deployment; in battle and prep the card draws the live `range` (§21.16). In battle the renderer plays the equipped skill's own Spine clip and ON_SKILL_START sound (`UnitInfo.skillIndex`; `data/assets.json` lists icons, clips and sounds for every skill index).
 
+**导出 / 导入 a loadout:** 导出 hands the current loadout out as a versioned envelope `{ kind: 'stronghold.loadout', v, exportedAt, count, entries }` — copied through `ui/clipboard.js copyText` or downloaded as a file. 导入 accepts that envelope, the stored `{ v, entries }` form and a bare `{ [chessId]: { skill, module } }` map (serialised text too), and refuses another tool's `kind`, junk, an empty result and a **newer** `v` (`parseImport` — a newer payload is never mis-read). Both go through `loadoutSync.applyLoadoutEntries` → `sanitizeEntries`, so a preset from another build never sends the server an entry it would refuse, an import that keeps nothing changes nothing, and the result is reported as N imported / M not (`ui/loadoutModel.js`, `screens/loadout.js`).
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 ## 17. User playtest #3 (v2.2): models, picking, FX, rules, HUD