Merge claude/2

Drive the section title from the filename instead of the JS display-override
added earlier: rename configs/backup/backup_advanced -> backup_engine, update
the category SUBCATEGORY_ORDER and the file's header comment, and revert the
formatSubcategoryName override. The CFG_BACKUP_* keys are unchanged.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Signed-off-by: librelad <librelad@digitalangels.vip>

configs/backup/.category

@@ -2,4 +2,4 @@ TITLE=Backup
 DESCRIPTION=Backup schedules, retention, and engine settings
 ICON=backup
 ORDER=3
-SUBCATEGORY_ORDER=backup_general,backup_retention,backup_advanced
+SUBCATEGORY_ORDER=backup_general,backup_retention,backup_engine

configs/backup/backup_engine

@@ -1,5 +1,5 @@
 # ================================================================================
-# Backup Advanced - **ADVANCED** Engine-level knobs most users won't need to touch
+# Backup Engine - **ADVANCED** Engine-level knobs most users won't need to touch
 # ================================================================================
 CFG_BACKUP_ENGINE=restic                                       # Default Backup Engine - Fallback engine for new locations (each location can override) [restic:restic|borg:BorgBackup|kopia:Kopia]
 CFG_BACKUP_STRATEGY=stop-snapshot-start                        # Backup Strategy - How containers are quiesced before snapshotting [stop-snapshot-start:Stop → snapshot → start (safe default)|pause-snapshot-unpause:Pause → snapshot → unpause (less downtime)|live:Live — snapshot while running (only with DB dump hooks)]

containers/libreportal/frontend/js/components/config/config-utils.js

@@ -5,13 +5,6 @@ class ConfigUtils {
   }
 
   formatSubcategoryName(subcategoryName) {
-    // Display-name overrides where the derived title isn't specific enough.
-    // The underlying file/key names (e.g. backup_advanced, CFG_BACKUP_*) are
-    // untouched, so saved values are unaffected.
-    const overrides = {
-      backup_advanced: 'Engine'
-    };
-    if (overrides[subcategoryName]) return overrides[subcategoryName];
     return subcategoryName.replace(/_/g, ' ').replace(/\b\w/g, function(l) { return l.toUpperCase(); });
   }