feedback5 CB5: the boss round's prep shows both players of a pair together — the partner's pieces on the other half, as the battle places them — and frames the pair's two avatars in the official green (community report of 2026-10-06, item 51)

The own half was already the official one (the right-hand player on the right half with the
right_boss_*_camera_param camera, its layout mirrored col c -> 20 - c with RIGHT <-> LEFT, so its operators
face the leader as before: research 09 §1.2, DESIGN §15); the partner's half stood empty and nothing framed
the pair.
Server: in a boss round's prep m.private.bossMate { playerId, side, units } = the partner's board as UnitInfo
on its half (Match.bossMateView, finalAssault.js bossFieldPlacement); markPrivate marks the partner's
m.private with the mover's, so it follows live; a scout of either player (Match.prepFieldMeta) carries both
halves (`mate`), and its signature covers the partner's board.
Client: render/app.js syncMates draws the partner's units read-only ('m:<uid>' views: never picked, dragged
or swept with the own pieces) and the whole boss field is lit; the team panel frames the pair's avatars
(gameLogic teamFrameIds: the players still in by seat, two by two, as prepCamera — the boss field in the
fight) from the round start through the Final Assault / Hidden Core, with the official ui/battle
bg_team_border tinted the autochess green (#4ed8af; a plain ring without the local art); none for a lone
player, an eliminated player, a spectator seat, or 联防.
Overlap with PR #191 (same-field frames, issue #190; not merged): it published m.public bossPairing and
framed the partner alone in gold, 联防 included, plus a banner naming the partner; here the pairing is read
as the prep camera already does, both avatars get the official green frame, boss rounds only.
[ASSUMED] the partner's bench is not shown; one frame per avatar.

Golden unchanged. Tests: test/match/feedback5-boss-pair-prep.test.js (new, 4), the item 55 test now checks
the scouted player's own pieces (the partner's stand on the other half); SP_E2E
test/ui/feedback5-boss-pair.e2e.test.js (new, 2: both halves and the frames in prep and fight; item 55's
eliminated guest on the boss field with the leader). Docs: design/client.md §10 / §15, design/network.md,
PLAYING.md.

server/match/player/views.js

@@ -55,6 +55,8 @@ export class PlayerViews {
     const free = this.shop.freeRefreshes > 0;
     const board = [];
     for (const { r, c, piece } of boardOrder(this.board)) board.push(this.pieceView(piece, [r, c]));
+    // a boss round's prep: the partner's board on its half of the boss field (Match.bossMateView, item 51)
+    const bossMate = typeof this.m.bossMateView === 'function' ? this.m.bossMateView(this) : null;
     return {
       t: 'm.private',
       playerId: this.playerId,
@@ -98,6 +100,10 @@ export class PlayerViews {
       // switched off)
       diy: this.diy,
       diyBanned: this.diyBanned,
+      // 最终攻势 / 隐秘核心 prep (community report of 2026-10-06, item 51): `{ playerId, side, units }` — the pair partner's
+      // board pieces as UnitInfo on its half of the boss field (mirrored on the right half, as the battle places them);
+      // the own prep view draws them beside the own half, read-only. Absent otherwise.
+      ...(bossMate ? { bossMate } : {}),
       stats: {
         dmgDealt: Math.round(this.stats.dmgDealt), kills: this.stats.kills, leaks: this.stats.leaks, gold: this.stats.gold,
         refreshes: this.stats.refreshes, merges: this.stats.merges,