fix: show Set... placeholder for scheduled/wait/until date fields

Also fix selectedTask going stale after store updates by syncing
it from the store subscription instead of manual patching.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

opal-web/src/lib/components/TaskDetail.svelte

@@ -402,6 +402,12 @@
 					</span>
 				{/if}
 			</div>
+		{:else}
+			<!-- svelte-ignore a11y-click-events-have-key-events a11y-no-static-element-interactions -->
+			<div class="field-row editable" on:click={() => startEdit('scheduled')}>
+				<span class="field-label">Scheduled</span>
+				<span class="field-value clickable">Set...</span>
+			</div>
 		{/if}
 
 		<!-- Wait -->
@@ -425,6 +431,12 @@
 					</span>
 				{/if}
 			</div>
+		{:else}
+			<!-- svelte-ignore a11y-click-events-have-key-events a11y-no-static-element-interactions -->
+			<div class="field-row editable" on:click={() => startEdit('wait')}>
+				<span class="field-label">Wait</span>
+				<span class="field-value clickable">Set...</span>
+			</div>
 		{/if}
 
 		<!-- Until -->
@@ -448,6 +460,12 @@
 					</span>
 				{/if}
 			</div>
+		{:else}
+			<!-- svelte-ignore a11y-click-events-have-key-events a11y-no-static-element-interactions -->
+			<div class="field-row editable" on:click={() => startEdit('until')}>
+				<span class="field-label">Until</span>
+				<span class="field-value clickable">Set...</span>
+			</div>
 		{/if}
 
 		<!-- Active since -->

opal-web/src/routes/+page.svelte

@@ -37,6 +37,11 @@
 	// Subscribe to store
 	const unsubscribe = tasksStore.subscribe(value => {
 		tasks = value;
+		// Keep selectedTask in sync with store changes
+		if (selectedTask) {
+			const updated = value.find(t => t.uuid === selectedTask.uuid);
+			if (updated) selectedTask = updated;
+		}
 	});
 
 	onMount(() => {
@@ -197,10 +202,6 @@
 	async function handleUpdate(uuid, updates) {
 		try {
 			await tasksStore.updateTask(uuid, updates);
-			// Keep selectedTask fresh
-			if (selectedTask?.uuid === uuid) {
-				selectedTask = { ...selectedTask, ...updates };
-			}
 		} catch (error) {
 			console.error('Failed to update task:', error);
 		}