Fix admin regressions from Biome refactor: theme init, mobile nav, i18n.

Restore valid browser JS in theme-init, close mobile sidebar on navigation, and split autoDjForm title/trackTitle across locales.

Co-authored-by: Cursor <[email protected]>

src/messages/de.json

@@ -1630,7 +1630,7 @@
 					"save": "Punkteeinstellungen speichern"
 				},
 				"autoDjForm": {
-					"title": "Title",
+					"title": "Radio AutoDJ",
 					"subtitle": "Fallback playlist (radio_auto_dj_playlist) the radio rotates through when no live DJ is streaming. Ordered by sort order then title.",
 					"dbError": "Could not load the AutoDJ playlist (database unavailable).",
 					"tracks": "Tracks",
@@ -1660,7 +1660,8 @@
 					"inactiveLabel": "inactive",
 					"deactivate": "Deactivate",
 					"activate": "Activate",
-					"delete": "Delete"
+					"delete": "Delete",
+					"trackTitle": "Title"
 				},
 				"moderationPage": {
 					"title": "DJ Moderation",