Playtest #3 fixes: lost models, picking, live LP, temp overflow, 蕾缪安 S3, 回环射手, FX, detail card, spinners

- #1 lost operator models: the Spine store no longer hands out a skeleton whose unload is in flight
  (PIXI.Assets.unload is async); eviction runs 1 s after a release and the empty-scene budget only after 3 s
- #7 picking: one shared rule (render/pick.js, pixel probe where bodies overlap) for prep/battle clicks,
  hover, the enemy pen and equipment drops; the drag ghost stands on its drop tile; hover probes capped
  at one per frame
- #2 the top-bar LP drops live as the own battle's enemies enter the blue gate (−N, 联防中), teammates'
  pending LP in the team panel
- #3 temp overflow pieces that arrive after a prep deadline survive through the next prep (tempDue);
  temp-row warning and ready-button reason
- #4 蕾缪安 S3: locks every 0.5 s, then one shell every 0.3 s in lock order (PRTS notes), bombardShell fx
- #5 回环射手: real boomerang (out 15, back 3.75 tiles/s, attack only when every boomerang is caught)
- #6 visible projectiles, muzzle flashes, slashes, skill bursts and auras at unchanged frame cost
- #8 特质 right under the detail card header, with its official type icon
- #9 no spinning busy cursors / spinners next to texts; game data warmed before the match
- docs, recordings and tests updated (2414 unit tests, all browser suites green)

public/js/screens/loadout.js

@@ -13,7 +13,7 @@
 // Keyboard: Esc closes, ←/→ move through the (filtered) roster when focus is not in the search field.
 
 import { useEffect, useMemo, useRef, useState } from '../../vendor/hooks.module.js';
-import { html, Icon, MicroLabel, Button, TierChip, TextField, Countdown, confirmDialog, hasDeadline } from '../ui/components.js';
+import { html, Icon, MicroLabel, Button, TierChip, TextField, Countdown, Spinner, confirmDialog, hasDeadline } from '../ui/components.js';
 import { Img, RichText, UnitThumb } from '../ui/gameComponents.js';
 import { chessAvatarUrl, chessPortraitUrl, subProfIconUrl, bondIconUrl, moduleTypeIconUrl } from '../ui/assetUrls.js';
 import { data, useData, localAsset } from '../data.js';
@@ -362,7 +362,7 @@ function LoadoutScreen({ st }) {
       </div>
     </header>
     <p class=${cx('lo-note', locked && 'is-locked')}><${Icon} name="info" />${locked ? '本局的调配已锁定（确认本局信息后无法修改），修改将在下一局生效' : fromText}</p>
-    ${!ready ? html`<div class="lo-loading"><span class="spinner"></span>正在读取干员数据…</div>` : html`<main class=${cx('lo-body', narrowDetail && 'is-detail')}>
+    ${!ready ? html`<div class="lo-loading"><${Spinner} size="sm" />正在载入干员数据（打开页面后仅载入一次）…</div>` : html`<main class=${cx('lo-body', narrowDetail && 'is-detail')}>
       <section class="lo-roster">
         <${Filters} m=${m} filters=${st.filters} bonds=${bonds} onFilters=${(filters) => loadoutStore.set({ filters })} />
         <div class="lo-grid" role="listbox" aria-label="干员列表" ref=${gridRef}>