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/css/screens/room.css

@@ -257,7 +257,7 @@
 .dpick__opt .icon { width: .2rem; height: .2rem; color: var(--d-color); opacity: .55; transition: opacity var(--t-fast); }
 .dpick__opt:hover:not(:disabled) { color: var(--text-hi); background: rgba(255, 255, 255, .03); }
 .dpick__opt:hover:not(:disabled) .icon { opacity: 1; }
-.dpick__opt:disabled { cursor: progress; }
+.dpick__opt:disabled { cursor: default; }
 .dpick__opt.is-active {
   color: var(--d-color);
   background: transparent; background: color-mix(in srgb, var(--d-color) 17%, transparent);