feat: GET /transcripts/{filename} — serve transcript content

output.py

@@ -35,6 +35,17 @@ def save_transcript(
     return path
 
 
+def read_transcript(output_dir: str, filename: str) -> str | None:
+    """Return file content if filename is a plain .md file inside output_dir."""
+    if os.path.basename(filename) != filename or not filename.endswith(".md"):
+        return None
+    path = os.path.join(output_dir, filename)
+    if not os.path.exists(path):
+        return None
+    with open(path, encoding="utf-8") as f:
+        return f.read()
+
+
 def list_transcripts(output_dir: str, limit: int = 20) -> list[dict]:
     if not os.path.exists(output_dir):
         return []