fix: anchor MEDIA tag parsing

src/media/parse.ts

@@ -71,6 +71,13 @@ export function splitMediaFromOutput(raw: string): {
       continue;
     }
 
+    const trimmedStart = line.trimStart();
+    if (!trimmedStart.startsWith("MEDIA:")) {
+      keptLines.push(line);
+      lineOffset += line.length + 1; // +1 for newline
+      continue;
+    }
+
     const matches = Array.from(line.matchAll(MEDIA_TOKEN_RE));
     if (matches.length === 0) {
       keptLines.push(line);