feat(04-02): add pin button, due date picker, and pinned section UI

- Add pin button in expanded view with toggle functionality
- Add due date picker in expanded view with date input
- Show pin indicator and due date in collapsed view
- Separate EntryList into pinned and unpinned sections
- Pinned section appears at top with header label

src/lib/components/EntryCard.svelte

@@ -27,6 +27,7 @@
 	let editTitle = $state(entry.title || '');
 	let editContent = $state(entry.content);
 	let editType = $state(entry.type);
+	let editDueDate = $state(entry.dueDate || '');
 
 	// Sync edit state when entry changes (after invalidateAll)
 	$effect(() => {
@@ -34,6 +35,7 @@
 			editTitle = entry.title || '';
 			editContent = entry.content;
 			editType = entry.type;
+			editDueDate = entry.dueDate || '';
 		}
 	});
 
@@ -155,6 +157,34 @@
 		// invalidateAll is called by ImageUpload, so nothing extra needed here
 	}
 
+	async function handleTogglePin() {
+		const formData = new FormData();
+		formData.append('id', entry.id);
+
+		await fetch('?/togglePin', {
+			method: 'POST',
+			body: formData
+		});
+
+		await invalidateAll();
+	}
+
+	async function handleDueDateChange(e: Event) {
+		const input = e.target as HTMLInputElement;
+		editDueDate = input.value;
+
+		const formData = new FormData();
+		formData.append('id', entry.id);
+		formData.append('dueDate', input.value);
+
+		await fetch('?/updateDueDate', {
+			method: 'POST',
+			body: formData
+		});
+
+		await invalidateAll();
+	}
+
 	async function handleCameraInput(e: Event) {
 		const input = e.target as HTMLInputElement;
 		const file = input.files?.[0];
@@ -266,6 +296,14 @@
 				{#if isSaving}
 					<span class="text-xs text-gray-400">Saving...</span>
 				{/if}
+				{#if entry.pinned}
+					<svg class="w-4 h-4 text-yellow-500" fill="currentColor" viewBox="0 0 20 20" aria-label="Pinned">
+						<path d="M5 4a2 2 0 012-2h6a2 2 0 012 2v3.586l1.707 1.707A1 1 0 0117 10v1a1 1 0 01-1 1h-4v5a1 1 0 11-2 0v-5H6a1 1 0 01-1-1v-1a1 1 0 01.293-.707L7 7.586V4z" />
+					</svg>
+				{/if}
+				{#if entry.dueDate && !expanded}
+					<span class="text-xs text-gray-500">{entry.dueDate}</span>
+				{/if}
 				{#if entry.images?.length > 0 && !expanded}
 					<span
 						class="flex items-center gap-1 text-xs text-gray-500"
@@ -404,6 +442,31 @@
 					</div>
 				</div>
 
+				<!-- Pin and Due Date row -->
+				<div class="flex items-center gap-4">
+					<button
+						type="button"
+						onclick={handleTogglePin}
+						class="p-2 rounded-lg hover:bg-gray-100 {entry.pinned ? 'text-yellow-500' : 'text-gray-400'}"
+						aria-label={entry.pinned ? 'Unpin entry' : 'Pin entry'}
+					>
+						<svg class="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
+							<path d="M5 4a2 2 0 012-2h6a2 2 0 012 2v3.586l1.707 1.707A1 1 0 0117 10v1a1 1 0 01-1 1h-4v5a1 1 0 11-2 0v-5H6a1 1 0 01-1-1v-1a1 1 0 01.293-.707L7 7.586V4z" />
+						</svg>
+					</button>
+
+					<div>
+						<label for="due-date-{entry.id}" class="block text-sm font-medium text-gray-700 mb-1">Due Date</label>
+						<input
+							id="due-date-{entry.id}"
+							type="date"
+							value={editDueDate}
+							onchange={handleDueDateChange}
+							class="px-3 py-2 border border-gray-200 rounded-lg text-base focus:outline-none focus:ring-2 focus:ring-blue-500"
+						/>
+					</div>
+				</div>
+
 				<div class="flex items-center justify-between">
 					<div>
 						<label for="edit-type-{entry.id}" class="block text-sm font-medium text-gray-700 mb-1"

src/lib/components/EntryList.svelte

@@ -11,6 +11,10 @@
 	}
 
 	let { entries }: Props = $props();
+
+	// Separate entries into pinned and unpinned
+	let pinnedEntries = $derived(entries.filter(e => e.pinned));
+	let unpinnedEntries = $derived(entries.filter(e => !e.pinned));
 </script>
 
 {#if entries.length === 0}
@@ -19,9 +23,22 @@
 		<p class="text-sm mt-1">Use the capture bar below to add your first entry</p>
 	</div>
 {:else}
-	<div class="divide-y divide-gray-100 md:divide-y-0 md:space-y-3">
-		{#each entries as entry (entry.id)}
-			<EntryCard {entry} />
-		{/each}
-	</div>
+	{#if pinnedEntries.length > 0}
+		<div class="mb-4">
+			<h2 class="text-sm font-medium text-gray-500 uppercase tracking-wide mb-2 px-4 md:px-0">Pinned</h2>
+			<div class="divide-y divide-gray-100 md:divide-y-0 md:space-y-3">
+				{#each pinnedEntries as entry (entry.id)}
+					<EntryCard {entry} />
+				{/each}
+			</div>
+		</div>
+	{/if}
+
+	{#if unpinnedEntries.length > 0}
+		<div class="divide-y divide-gray-100 md:divide-y-0 md:space-y-3">
+			{#each unpinnedEntries as entry (entry.id)}
+				<EntryCard {entry} />
+			{/each}
+		</div>
+	{/if}
 {/if}