Add accept to file inputs

materialious/src/lib/components/settings/ExportImport.svelte

@@ -92,6 +92,7 @@
 				}
 			});
 		}}
+		accept=".json,.opml,.csv"
 		type="file"
 	/>
 </div>
@@ -174,6 +175,7 @@
 
 			await loadSettingsFromFile(files[0]);
 		}}
+		accept=".json"
 		type="file"
 	/>
 </div>

materialious/src/lib/importExport.ts

@@ -58,7 +58,7 @@ export async function importSubscriptionsFromFile(file: File) {
 
 	const subsToImport: Subscription[] = [];
 
-	if (fileContents.startsWith('<opml')) {
+	if (file.name.endsWith('.opml')) {
 		const parser = new DOMParser();
 		const xmlDoc = parser.parseFromString(fileContents, 'text/xml');