feat: actually handle image resolution setting

i added it to svg but forgot to add it for the rest of the images, nice

src/lib/converters/mediabunny.svelte.ts

@@ -533,6 +533,13 @@ export class MediabunnyConverter extends Converter {
 					stay: 10000,
 				},
 			});
+
+			if (!isValid) {
+				this.activeConversions.delete(file.id);
+				throw new Error(
+					`Mediabunny cannot produce an output for ${file.name} due to unsupported tracks/codecs.`,
+				);
+			}
 		}
 
 		conversion.onProgress = (progress) => {

src/lib/workers/magick.ts

@@ -293,6 +293,22 @@ const magickConvert = async (
 	let fmt = to.slice(1).toUpperCase();
 	if (fmt === "JFIF") fmt = "JPEG";
 
+	const resolution = conversionSettings.resolution as string;
+	if (resolution && resolution !== "auto") {
+		const actualResolution =
+			resolution === "custom"
+				? (conversionSettings.customResolution as string)
+				: resolution;
+
+		const [width, height] = actualResolution
+			.split("x")
+			.map((dim: string) => parseInt(dim));
+
+		if (width && height) {
+			img.resize(width, height);
+		}
+	}
+
 	// ICO size clamp to avoid WidthOrHeightExceedsLimit
 	if (fmt === "ICO") {
 		const max = 256;