Fix image uploads: accept more formats, convert to JPEG, show errors

- Added HEIF, GIF, AVIF, BMP, TIFF to allowed image types
- All uploads converted to JPEG via sharp (fixes HEIC/HEIF from iPhones)
- Upload action wrapped in try/catch, errors shown in UI
- Error banner displayed above image section on failure

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/lib/server/uploads.ts

@@ -6,7 +6,10 @@ import sharp from 'sharp';
 const UPLOAD_BASE = 'static/uploads';
 const THUMBNAIL_WIDTH = 300;
 
-const ALLOWED_IMAGE_TYPES = ['image/jpeg', 'image/png', 'image/webp', 'image/heic'];
+const ALLOWED_IMAGE_TYPES = [
+	'image/jpeg', 'image/png', 'image/webp', 'image/heic', 'image/heif',
+	'image/bmp', 'image/tiff', 'image/gif', 'image/avif'
+];
 const ALLOWED_DOC_TYPES = ['application/pdf', 'text/plain', 'application/zip'];
 
 export async function saveImage(
@@ -14,10 +17,10 @@ export async function saveImage(
 	subfolder: 'devices' | 'components'
 ): Promise<{ filePath: string; thumbnailPath: string }> {
 	if (!ALLOWED_IMAGE_TYPES.includes(file.type)) {
-		throw new Error(`Invalid image type: ${file.type}`);
+		throw new Error(`Invalid image type: ${file.type}. Allowed: JPEG, PNG, WebP, HEIC, GIF, AVIF, BMP, TIFF`);
 	}
 
-	const ext = extname(file.name) || '.jpg';
+	const ext = '.jpg'; // always save as jpg for consistency
 	const filename = `${randomUUID()}${ext}`;
 	const thumbFilename = `thumb_${filename}`;
 
@@ -26,15 +29,15 @@ export async function saveImage(
 
 	const buffer = Buffer.from(await file.arrayBuffer());
 
-	// Save original
+	// Convert to JPEG and save original
 	const filePath = join(dir, filename);
-	await writeFile(filePath, buffer);
+	await sharp(buffer).jpeg({ quality: 90 }).toFile(filePath);
 
 	// Generate thumbnail
 	const thumbnailPath = join(dir, thumbFilename);
 	await sharp(buffer).resize(THUMBNAIL_WIDTH).jpeg({ quality: 80 }).toFile(thumbnailPath);
 
-	// Return paths relative to static/ for serving
+	// Return URL paths (always forward slashes)
 	return {
 		filePath: `/uploads/${subfolder}/${filename}`,
 		thumbnailPath: `/uploads/${subfolder}/${thumbFilename}`

src/routes/(app)/devices/[id]/+page.server.ts

@@ -217,6 +217,7 @@ export const actions: Actions = {
 		const file = formData.get('image') as File;
 		if (!file || file.size === 0) return fail(400, { error: 'No file selected' });
 
+		try {
 			const { filePath, thumbnailPath } = await saveImage(file, 'devices');
 			const caption = formData.get('caption') as string;
 
@@ -228,6 +229,9 @@ export const actions: Actions = {
 			});
 
 			return { imageUploaded: true };
+		} catch (err) {
+			return fail(400, { error: `Upload failed: ${err instanceof Error ? err.message : 'Unknown error'}` });
+		}
 	},
 
 	deleteImage: async ({ request }) => {

src/routes/(app)/devices/[id]/+page.svelte

@@ -3,7 +3,7 @@
 	import { DEVICE_CONDITIONS, DEVICE_LOG_TYPES } from '$lib/constants.js';
 	import { formatDate, timeAgo } from '$lib/utils/date.js';
 
-	let { data } = $props();
+	let { data, form } = $props();
 	let showStatusForm = $state(false);
 	let showUploadForm = $state(false);
 	let showDocForm = $state(false);
@@ -130,6 +130,10 @@
 					</button>
 				</div>
 
+				{#if form?.error}
+					<div class="mb-3 rounded-md bg-red-50 p-3 text-sm text-red-700 dark:bg-red-900/30 dark:text-red-300">{form.error}</div>
+				{/if}
+
 				{#if showUploadForm}
 					<form method="POST" action="?/uploadImage" enctype="multipart/form-data" use:enhance class="mb-4 flex flex-wrap items-end gap-3">
 						<input type="file" name="image" accept="image/*" required