Watching a teammate shows their hand, 临时整备区, equipment, strategy and effects (#129)

The prep scout of another player's board carries their 整备区 hand and 临时整备区 as units on the bench rows (like the own prep bench), the equipped items of their operators, their strategy in the drawer and their effects column (the official mode shows a teammate's hand too). The scout signature includes the hand / temp slots, so a moved card refreshes the watcher. Closes #128. Contributed by @2321Robin.

public/js/battle/runner.js

@@ -65,6 +65,7 @@
 import { net as appNet } from '../net.js';
 import { store as appStore } from '../store.js';
 import { unitStatsEntry, fxForm } from '../../../shared/protocol.js';
+import { spectateEffects } from './observe.js';
 
 const TICK = 1 / 30;
 /** Fast-forward budget per frame (ticks) when far behind. */
@@ -561,6 +562,8 @@ export function createBattleRunner(deps) {
     const field = {
       t: 'm.field', ...meta, fieldId: e.fieldId, kind: e.kind, rect: meta.rect ?? e.spec.rect, stageId: meta.stageId ?? e.spec.stageId,
       live: !e.done, battleId: e.battleId, players: e.members.slice(), local: true, speed: e.speed,
+      // the watched player's effects column (user playtest #2; undefined for 联防 / boss pairs and server-run fields)
+      effects: spectateEffects(e.spec, e.members),
       // which half each player holds (联防: the first helper takes the right half; boss pairs: L / R)
       sides: Object.fromEntries((e.spec.players || []).filter((p) => p && p.playerId).map((p) => [p.playerId, p.side === 'R' || Number(p.colOffset) >= 8 ? 'R' : 'L'])),
     };