Fix MP3 comment tagging and remove Genre from settings metadata

app.py

@@ -159,13 +159,15 @@ def apply_mp3_tags(path, title=None):
 
         audio.save()
 
-        # Comment requires a real ID3 frame, not EasyID3.
+        # Comment requires a real ID3 frame, not EasyID3. Write both COMM and a TXXX
+        # "Comment" frame for broad compatibility across players and readers.
         if cfg.get('comment'):
-            from mutagen.id3 import ID3, COMM
+            from mutagen.id3 import COMM, TXXX
             audio2 = MP3(path)
             if audio2.tags is None:
                 audio2.add_tags()
             audio2.tags["COMM"] = COMM(encoding=3, lang='eng', desc='Comment', text=cfg['comment'])
+            audio2.tags["TXXX:Comment"] = TXXX(encoding=3, desc='Comment', text=cfg['comment'])
             audio2.save()
     except Exception as e:
         # Don't fail the upload just because tagging failed; log/flash only if inside request context.

booth_settings.json

@@ -0,0 +1,7 @@
+{
+  "artist": "Trollgorithm",
+  "album": "Theme Booth 2026",
+  "year": "2026",
+  "genre": null,
+  "comment": "Custom booth song comment"
+}

templates/admin/settings.html

@@ -237,10 +237,6 @@
               <td>Year</td>
               <td><input type="text" id="year" name="year" value="{{ metadata.get('year', '') }}" placeholder="e.g. 2026"></td>
             </tr>
-            <tr>
-              <td>Genre</td>
-              <td><input type="text" id="genre" name="genre" value="{{ metadata.get('genre', '') }}" placeholder="e.g. Country Metal"></td>
-            </tr>
             <tr>
               <td>Comment</td>
               <td><textarea id="comment" name="comment" rows="3" placeholder="e.g. Custom theme song generated at the booth">{{ metadata.get('comment', '') }}</textarea></td>