Fix --raw to output raw content to stdout

--raw without -o now streams raw content to stdout instead of showing metadata

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

artdag.py

@@ -870,8 +870,8 @@ def view(cid, output, raw):
         url = f"{get_server()}/cache/{cid}"
 
     try:
-        if output == "-":
-            # Stream to stdout for piping
+        if output == "-" or (raw and not output):
+            # Stream to stdout for piping (--raw without -o also goes to stdout)
             resp = requests.get(url, stream=True)
             resp.raise_for_status()
             for chunk in resp.iter_content(chunk_size=8192):