feat(romhacks): serve library over internal Caddy file_server; notes embed art + guide links

- proxy: read-only bind /storage1/labdata/romhacks/library -> /srv/romhacks
- Caddyfile: romhacks-files.ginnoir.com (internal_only) file_server + browse
- render_catalog_notes.py + handoff.py: embed box art and link guides/
  spreadsheets via https://romhacks-files.ginnoir.com/<slug>/<file>
  (handoff art/guides; guide filter drops buried game-data txt, caps at 30)
- regenerate bookmarks

bookmarks-domains.html

@@ -49,11 +49,8 @@
             <DT><A HREF="https://nzbget.ginnoir.com">nzbget</A>
             <DT><A HREF="https://whisparr.ginnoir.com">whisparr</A>
             <DT><A HREF="https://stash.ginnoir.com">stash</A>
-        </DL><p>
-
-        <DT><H3>GAMES / ROMS (internal)</H3>
-        <DL><p>
             <DT><A HREF="https://roms.ginnoir.com">roms</A>
+            <DT><A HREF="https://romhacks-files.ginnoir.com">romhacks-files</A>
         </DL><p>
 
         <DT><H3>NOTIFICATIONS &amp; RSS (public)</H3>
@@ -101,5 +98,10 @@
             <DT><A HREF="https://plane.ginnoir.com">plane</A>
         </DL><p>
 
+        <DT><H3>NOTES / PKM — public (obsidian-livesync syncs from any device) (public)</H3>
+        <DL><p>
+            <DT><A HREF="https://obsidian.ginnoir.com">obsidian</A>
+        </DL><p>
+
     </DL><p>
 </DL><p>