Defer challenge redraws until resolution and limit card plays

frontend/src/components/scene/ChallengePanel.svelte

@@ -127,8 +127,8 @@
             </p>
         {:else}
             <p class="info-text" style="margin-top: 0.5rem;">{state.obstacles.filter(o => chObstacleIds.includes(o.id)).length > 1
-                ? 'Other Pi-Rats may assist. Assistants do not draw replacement cards.'
-                : 'Only the attempting Pi-Rat can play against this single Obstacle.'}</p>
+                ? 'Other Pi-Rats may assist with one card each. Only the attempting Pi-Rat draws replacements after resolution.'
+                : 'Only the attempting Pi-Rat can play against this single Obstacle. Matching colors earn a replacement after resolution.'}</p>
             <div class="challenge-obstacles">
                 {#each chObstacleIds as oid}
                     {@const obs = state.obstacles.find(o => o.id === oid)}

frontend/src/components/scene/ObstacleItem.svelte

@@ -25,6 +25,7 @@
     $: challenge = openChallenges.find(c => JSON.parse(c.obstacle_ids || '[]').includes(obs.id));
     $: canPlay = state.player.role === 'pirat' && !state.player.is_dead && !state.player.needs_reroll
         && challenge && challenge.tax_state !== 'requested'
+        && !JSON.parse(challenge.plays || '[]').some(p => p.obstacle_id === obs.id)
         && (challenge.acting_player_id === state.player.id
             || state.obstacles.filter(o => JSON.parse(challenge.obstacle_ids || '[]').includes(o.id)).length > 1);
     $: cardCodeLabel = `${cardValue(obs.original_card)}${SUIT_CHAR[obs.suit] || ''}`;

frontend/src/lib/changelog.js

@@ -6,10 +6,11 @@
 //   - Add a CHANGELOG entry only when a commit changes something players can
 //     see. Skip refactors, tests, and tooling. Keep wording player-facing.
 
-export const VERSION = 36;
+export const VERSION = 37;
 
 // Newest first. Each entry: { version, date: 'YYYY-MM-DD', changes: [string, ...] }.
 export const CHANGELOG = [
+    { version: 37, date: '2026-09-04', changes: ['Color-match replacement cards arrive after the Deep resolves a Challenge. Each applied Obstacle accepts one card per Challenge, and each assistant can contribute one card.'] },
     { version: 36, date: '2026-09-04', changes: ['Duel instructions clarify that only the defender draws a replacement for matching the Obstacle’s color, even when the defense fails.'] },
     { version: 35, date: '2026-09-04', changes: ['Personal objectives now require a group vote. Propose the next objective from a character sheet, then vote Yes or No at the table. A majority approves; the Captain breaks tied votes.'] },
     { version: 34, date: '2026-09-04', changes: ['Assistance is available only when a Challenge has multiple active Obstacles. Gat and Name Tax takeovers still work against a single Obstacle.'] },