R-304 option C: operator mail when a household's code opens or may open an older package (once a day); R-298 side fix (no eject/format on a backup-target drive); R-717 comments

Unreleased; ships with tomorrow's release (needs the hub of the same day).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/testdata/i18n_parity/storage_full.html

@@ -614,6 +614,11 @@ window.__registeredPaths=["\/mnt\/usb1","\/mnt\/old","\/mnt\/hdd1","\/mnt\/hdd2"
   function actions(d, registered, hasSafeDisconnect){
     
     if(d.role!=='user-data' || !d.mount_path || d.mount_path.indexOf('/mnt/')!==0) return '';
+    
+    
+    if(d.backup_target){
+      return registered[regKey(d)] ? '' : '<div class="drive-actions"><button class="btn btn-xs btn-primary" onclick="registerDrive(\''+esc(d.mount_path)+'\')">Regisztrálás</button></div>';
+    }
     var dev = esc(d.backing_device||''), mpRaw = esc(d.mount_path), reg = esc(regKey(d));
     var btns = '';