diff --git a/frontend/src/routes/[fam]/[username]/+page.svelte b/frontend/src/routes/[fam]/[username]/+page.svelte
index b12304a..b92dae4 100644
--- a/frontend/src/routes/[fam]/[username]/+page.svelte
+++ b/frontend/src/routes/[fam]/[username]/+page.svelte
@@ -498,9 +498,7 @@
 		const counts: number[] = [];
 		for (let i = 0; i < 7; i++) {
 			const d = addDays(weekStart, i);
-			counts.push(
-				weekCompletions.filter((c) => (c.date?.slice(0, 10) || c.date) === d).length
-			);
+			counts.push(weekCompletions.filter((c) => (c.date?.slice(0, 10) || c.date) === d).length);
 		}
 		return counts;
 	});
@@ -998,10 +996,18 @@
 			if (optimistic) {
 				famStore.applyRecord('completions', optimistic, 'delete');
 			}
+			const msg = e instanceof Error ? e.message : String(e);
+			if (/CHORE_GONE/.test(msg)) {
+				// Drop the dead card synchronously so a second tap can't re-enter
+				// before the resync round-trip finishes (the repeated 400s).
+				famStore.applyRecord('assigned_chores', chore, 'delete');
+				console.error(
+					`[diag] toggle CHORE_GONE(drop-card) member=${memberId} fam=${famId} chore=${chore.id}`
+				);
+			}
 			try {
 				await famStore.resync();
 			} catch {}
-			const msg = e instanceof Error ? e.message : String(e);
 			showToast(
 				/CHORE_GONE/.test(msg)
 					? 'This chore was changed — list refreshed.'
@@ -1231,7 +1237,12 @@
 					{/if}
 				</Card>
 
-				<Card cols={1} title="Claims" accent={hasClaimableRewards ? '#f97316' : undefined} class={hasClaimableRewards ? 'claims-card' : ''}>
+				<Card
+					cols={1}
+					title="Claims"
+					accent={hasClaimableRewards ? '#f97316' : undefined}
+					class={hasClaimableRewards ? 'claims-card' : ''}
+				>
 					{#if claimableRewards().length === 0}
 						<div class="claims-empty">
 							{@html checkCircleIcon}<span>No outstanding claims</span>
@@ -1396,12 +1407,7 @@
 		{/if}
 		<!-- HERO -->
 		<header class="hero">
-			<svg
-				class="hero-bg"
-				viewBox="0 0 700 120"
-				preserveAspectRatio="none"
-				aria-hidden="true"
-			>
+			<svg class="hero-bg" viewBox="0 0 700 120" preserveAspectRatio="none" aria-hidden="true">
 				<polyline
 					points={heroSpark.line}
 					fill="none"
@@ -1688,8 +1694,12 @@
 			{/if}
 			{#if inYesterday}
 				<div class="yesterday-banner">
-					<span>📝 Showing <b>yesterday</b> — tap anything you missed. Undo lives on today's view.</span>
-					<button class="yesterday-back" onclick={() => (viewDate = 'today')}>Back to today →</button>
+					<span
+						>📝 Showing <b>yesterday</b> — tap anything you missed. Undo lives on today's view.</span
+					>
+					<button class="yesterday-back" onclick={() => (viewDate = 'today')}
+						>Back to today →</button
+					>
 				</div>
 			{/if}
 			<div class="kanban">
@@ -1699,7 +1709,11 @@
 						<p class="empty">All done!</p>
 					{:else}
 						{#each dailyPending as chore}
-							<button class="chore" onclick={() => toggle(chore)} disabled={togglingIds.has(chore.id)}>
+							<button
+								class="chore"
+								onclick={() => toggle(chore)}
+								disabled={togglingIds.has(chore.id)}
+							>
 								<span class="checkbox">{@html circleIcon}</span>
 								<span class="chore-name">{choreName(chore)}</span>
 								<span class="chore-value">{chore.value} {chore.type}</span>
@@ -1716,7 +1730,11 @@
 						<p class="empty">All done!</p>
 					{:else}
 						{#each weeklyPending as chore}
-							<button class="chore" onclick={() => toggle(chore)} disabled={togglingIds.has(chore.id)}>
+							<button
+								class="chore"
+								onclick={() => toggle(chore)}
+								disabled={togglingIds.has(chore.id)}
+							>
 								<span class="checkbox">{@html circleIcon}</span>
 								<span class="chore-name">{choreName(chore)}</span>
 								<span class="chore-value">{chore.value} {chore.type}</span>