feat: Implement staff selection for STAFF resource type in resource modal

frontend/src/i18n/locales/en.json

@@ -4,6 +4,7 @@
     "error": "Error",
     "success": "Success",
     "save": "Save",
+    "saving": "Saving...",
     "saveChanges": "Save Changes",
     "cancel": "Cancel",
     "delete": "Delete",
@@ -161,6 +162,8 @@
     "editResource": "Edit Resource",
     "resourceDetails": "Resource Details",
     "resourceName": "Resource Name",
+    "resourceDescription": "Description",
+    "descriptionPlaceholder": "Optional description for this resource",
     "name": "Name",
     "type": "Type",
     "resourceType": "Resource Type",
@@ -175,11 +178,23 @@
     "noResourcesFound": "No resources found.",
     "addNewResource": "Add New Resource",
     "createResource": "Create Resource",
+    "updateResource": "Update Resource",
     "staffMember": "Staff Member",
     "room": "Room",
     "equipment": "Equipment",
     "resourceNote": "Resources are placeholders for scheduling. Staff can be assigned to appointments separately.",
-    "errorLoading": "Error loading resources"
+    "errorLoading": "Error loading resources",
+    "multilaneMode": "Multi-lane Mode",
+    "multilaneDescription": "Allow multiple simultaneous appointments",
+    "numberOfLanes": "Number of Lanes",
+    "lanesHelp": "How many appointments can be scheduled at the same time",
+    "capacity": "Capacity",
+    "simultaneous": "simultaneous",
+    "atATime": "at a time",
+    "assignStaff": "Assign Staff Member",
+    "searchStaffPlaceholder": "Search by name or email...",
+    "noMatchingStaff": "No matching staff found.",
+    "staffRequired": "Staff member is required for STAFF resource type."
   },
   "services": {
     "title": "Services",