feat(03-02): integrate image upload into QuickCapture

- Add image button next to submit button
- Show pending image preview with filename
- Allow removing pending image before submit
- Upload image after entry creation with new entry ID
- Disable button during upload to prevent duplicates
- Clean up object URLs properly

src/lib/components/QuickCapture.svelte

@@ -6,26 +6,84 @@
 	let content = $state('');
 	let type = $state<'task' | 'thought'>('thought');
 
+	// Pending image state
+	let pendingImage: File | null = $state(null);
+	let pendingPreviewUrl: string | null = $state(null);
+	let isUploading = $state(false);
+	let fileInput: HTMLInputElement;
+
 	// Initialize from preferences (client-side only)
 	$effect(() => {
 		if (typeof window !== 'undefined') {
 			type = $preferences.lastEntryType;
 		}
 	});
+
+	function handleImageSelect(e: Event) {
+		const input = e.target as HTMLInputElement;
+		const file = input.files?.[0];
+		if (file && file.type.startsWith('image/')) {
+			// Revoke previous preview if exists
+			if (pendingPreviewUrl) {
+				URL.revokeObjectURL(pendingPreviewUrl);
+			}
+			pendingImage = file;
+			pendingPreviewUrl = URL.createObjectURL(file);
+		}
+		// Reset input so same file can be selected again
+		input.value = '';
+	}
+
+	function clearPendingImage() {
+		if (pendingPreviewUrl) {
+			URL.revokeObjectURL(pendingPreviewUrl);
+		}
+		pendingImage = null;
+		pendingPreviewUrl = null;
+	}
+
+	async function uploadImageForEntry(entryId: string, file: File) {
+		const formData = new FormData();
+		formData.append('image', file);
+		formData.append('entryId', entryId);
+
+		const response = await fetch('?/uploadImage', {
+			method: 'POST',
+			body: formData
+		});
+
+		const result = await response.json();
+		if (result.type === 'failure') {
+			console.error('Image upload failed:', result.data?.error);
+		}
+	}
 </script>
 
 <form
 	method="POST"
 	action="?/create"
 	use:enhance={() => {
+		const imageToUpload = pendingImage;
+
 		return async ({ result, update }) => {
-			if (result.type === 'success') {
+			if (result.type === 'success' && result.data && 'entryId' in result.data) {
 				// Update preference
 				$preferences.lastEntryType = type;
+
+				// Upload pending image if exists
+				if (imageToUpload) {
+					isUploading = true;
+					try {
+						await uploadImageForEntry(result.data.entryId as string, imageToUpload);
+					} finally {
+						isUploading = false;
+						clearPendingImage();
+					}
+				}
+
 				// Clear form
 				title = '';
 				content = '';
-				// Let SvelteKit refresh data
 			}
 			await update();
 		};
@@ -40,15 +98,50 @@
 				placeholder="Title (optional)"
 				class="w-full px-3 py-2 border border-gray-200 rounded-lg text-base focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
 			/>
-			<div class="flex gap-2">
+			<div class="flex gap-2 items-end">
+				<div class="flex-1 flex flex-col gap-2">
 					<textarea
 						name="content"
 						bind:value={content}
 						placeholder="What's on your mind?"
 						required
 						rows="1"
-					class="flex-1 px-3 py-2 border border-gray-200 rounded-lg text-base resize-none focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
+						class="w-full px-3 py-2 border border-gray-200 rounded-lg text-base resize-none focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent"
 					></textarea>
+
+					{#if pendingPreviewUrl}
+						<div class="flex items-center gap-2">
+							<img
+								src={pendingPreviewUrl}
+								alt="Pending upload"
+								class="w-10 h-10 object-cover rounded border border-gray-200"
+							/>
+							<span class="text-xs text-gray-500 truncate max-w-[150px]">
+								{pendingImage?.name}
+							</span>
+							<button
+								type="button"
+								onclick={clearPendingImage}
+								class="p-1 text-gray-400 hover:text-red-500"
+								title="Remove image"
+							>
+								<svg
+									class="w-4 h-4"
+									fill="none"
+									stroke="currentColor"
+									viewBox="0 0 24 24"
+								>
+									<path
+										stroke-linecap="round"
+										stroke-linejoin="round"
+										stroke-width="2"
+										d="M6 18L18 6M6 6l12 12"
+									/>
+								</svg>
+							</button>
+						</div>
+					{/if}
+				</div>
 				<div class="flex flex-col gap-1">
 					<select
 						name="type"
@@ -58,14 +151,47 @@
 						<option value="thought">Thought</option>
 						<option value="task">Task</option>
 					</select>
+					<div class="flex gap-1">
+						<button
+							type="button"
+							onclick={() => fileInput?.click()}
+							disabled={!!pendingImage || isUploading}
+							class="p-2 border border-gray-200 rounded-lg hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-blue-500 disabled:opacity-50 disabled:cursor-not-allowed"
+							title="Add image"
+						>
+							<svg
+								class="w-5 h-5 text-gray-600"
+								fill="none"
+								stroke="currentColor"
+								viewBox="0 0 24 24"
+							>
+								<path
+									stroke-linecap="round"
+									stroke-linejoin="round"
+									stroke-width="2"
+									d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z"
+								/>
+							</svg>
+						</button>
 						<button
 							type="submit"
-						class="px-4 py-2 bg-blue-600 text-white rounded-lg touch-target font-medium hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
+							disabled={isUploading}
+							class="px-4 py-2 bg-blue-600 text-white rounded-lg touch-target font-medium hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 disabled:opacity-50"
 						>
-						Add
+							{isUploading ? '...' : 'Add'}
 						</button>
 					</div>
 				</div>
 			</div>
 		</div>
+	</div>
+
+	<!-- Hidden file input -->
+	<input
+		bind:this={fileInput}
+		type="file"
+		accept="image/*"
+		onchange={handleImageSelect}
+		class="hidden"
+	/>
 </form>