feat(03-04): add deleteImage form action

- Delete image files from filesystem (original + thumbnail)
- Delete image record from database
- Continue database deletion even if file deletion fails
- Returns success after cleanup

src/routes/+page.server.ts

@@ -1,7 +1,12 @@
 import type { PageServerLoad, Actions } from './$types';
 import { fail } from '@sveltejs/kit';
 import { entryRepository, imageRepository } from '$lib/server/db/repository';
-import { saveOriginal, saveThumbnail, ensureDirectories } from '$lib/server/images/storage';
+import {
+	saveOriginal,
+	saveThumbnail,
+	ensureDirectories,
+	deleteImage as deleteImageFile
+} from '$lib/server/images/storage';
 import { generateThumbnail } from '$lib/server/images/thumbnails';
 
 export const load: PageServerLoad = async ({ url }) => {
@@ -188,5 +193,33 @@ export const actions: Actions = {
 			console.error('Upload error:', err);
 			return fail(500, { error: 'Failed to save image' });
 		}
+	},
+
+	deleteImage: async ({ request }) => {
+		const formData = await request.formData();
+		const imageId = formData.get('imageId')?.toString();
+
+		if (!imageId) {
+			return fail(400, { error: 'Image ID required' });
+		}
+
+		// Get image to find extension for file deletion
+		const image = imageRepository.getById(imageId);
+		if (!image) {
+			return fail(404, { error: 'Image not found' });
+		}
+
+		// Delete files from filesystem
+		try {
+			await deleteImageFile(imageId, image.ext);
+		} catch (err) {
+			console.error('Failed to delete image files:', err);
+			// Continue to delete from database even if files missing
+		}
+
+		// Delete from database
+		imageRepository.delete(imageId);
+
+		return { success: true };
 	}
 };