chore(lint): remove dead eslint-disable directives

The project lints with Biome only, so none of these 78 directives across 57
files ever suppressed anything. Directives that carried the rationale for a
flagged dynamic index access keep that rationale as a plain comment.

src/actions/theme-manager.ts

@@ -278,14 +278,12 @@ export async function uploadBackground(formData: FormData): Promise<void> {
 
 	let uploaded = false;
 	try {
-		// eslint-disable-next-line security/detect-non-literal-fs-filename
 		await mkdir(MEDIA_ROOT, { recursive: true });
 		const ext = file.name.split(".").pop() ?? "png";
 		const name = `${Date.now()}-${Math.random().toString(36).slice(2, 8)}.${ext}`;
 		const bytes = await file.arrayBuffer();
 		const filePath = resolveMediaPath(name);
 		if (filePath.startsWith(MEDIA_ROOT + path.sep)) {
-			// eslint-disable-next-line security/detect-non-literal-fs-filename
 			await writeFile(filePath, Buffer.from(bytes));
 			await writeSetting("background_image", `/api/media/${name}`);
 			await writeSetting(
@@ -319,7 +317,7 @@ export async function applyPresetManager(formData: FormData): Promise<void> {
 	const name = String(formData.get("preset") ?? "")
 		.normalize("NFC")
 		.trim();
-	// eslint-disable-next-line security/detect-object-injection -- guarded by null check below
+	// guarded by null check below
 	const preset = PRESETS[name];
 	if (!preset) redirect(MANAGER_PATH);