Persist dashboard layer, filter, style, and panel UI preferences in localStorage.

Hydrate saved toggles after client mount so SSR does not reset operator layer layouts on refresh, and store map style, filters, and section expand state alongside layer visibility.

frontend/src/i18n/translations/en.json

@@ -147,6 +147,7 @@
     "clearMeasure": "Clear measurement"
   },
   "layers": {
+    "resetToDefaults": "Reset layers to defaults",
     "aircraft": "Aircraft",
     "commercialFlights": "Commercial Flights",
     "privateAircraft": "Private Aircraft",

frontend/src/i18n/translations/fa.json

@@ -147,6 +147,7 @@
     "clearMeasure": "پاک کردن اندازه‌گیری"
   },
   "layers": {
+    "resetToDefaults": "بازنشانی لایه‌ها به پیش‌فرض",
     "aircraft": "هواپیما",
     "commercialFlights": "پروازهای تجاری",
     "privateAircraft": "هواپیماهای خصوصی",

frontend/src/i18n/translations/fr.json

@@ -147,6 +147,7 @@
     "clearMeasure": "Effacer la mesure"
   },
   "layers": {
+    "resetToDefaults": "Réinitialiser les couches par défaut",
     "aircraft": "Aéronefs",
     "commercialFlights": "Vols commerciaux",
     "privateAircraft": "Aéronefs privés",

frontend/src/i18n/translations/zh-CN.json

@@ -147,6 +147,7 @@
     "clearMeasure": "清除测量"
   },
   "layers": {
+    "resetToDefaults": "将图层重置为默认",
     "aircraft": "航空器",
     "commercialFlights": "商业航班",
     "privateAircraft": "私人飞机",