feat: Implement Entity Suggestion Manager and Modal components

- Added EntitySuggestionManager.vue to manage entity suggestions and authentication.
- Created EntitySuggestionModal.vue for displaying suggestions and adding new entities.
- Integrated AuthManager for user authentication within the suggestion modal.
- Enhanced signal handling in start-servers.sh for graceful shutdown of servers.
- Improved server startup script to ensure proper cleanup and responsiveness to termination signals.
- Added documentation for signal handling fixes and usage instructions.

backend/apps/parks/admin.py

@@ -317,55 +317,55 @@ class PgHistoryEventsAdmin(admin.ModelAdmin):
     """Admin interface for pghistory Events"""
 
     list_display = (
-        'pgh_id',
-        'pgh_created_at',
-        'pgh_label',
-        'pgh_model',
-        'pgh_obj_id',
-        'pgh_context_display',
+        "pgh_id",
+        "pgh_created_at",
+        "pgh_label",
+        "pgh_model",
+        "pgh_obj_id",
+        "pgh_context_display",
     )
     list_filter = (
-        'pgh_label',
-        'pgh_model',
-        'pgh_created_at',
+        "pgh_label",
+        "pgh_model",
+        "pgh_created_at",
     )
     search_fields = (
-        'pgh_obj_id',
-        'pgh_context',
+        "pgh_obj_id",
+        "pgh_context",
     )
     readonly_fields = (
-        'pgh_id',
-        'pgh_created_at',
-        'pgh_label',
-        'pgh_model',
-        'pgh_obj_id',
-        'pgh_context',
-        'pgh_data',
+        "pgh_id",
+        "pgh_created_at",
+        "pgh_label",
+        "pgh_model",
+        "pgh_obj_id",
+        "pgh_context",
+        "pgh_data",
     )
-    date_hierarchy = 'pgh_created_at'
-    ordering = ('-pgh_created_at',)
+    date_hierarchy = "pgh_created_at"
+    ordering = ("-pgh_created_at",)
 
     fieldsets = (
         (
-            'Event Information',
+            "Event Information",
             {
-                'fields': (
-                    'pgh_id',
-                    'pgh_created_at',
-                    'pgh_label',
-                    'pgh_model',
-                    'pgh_obj_id',
+                "fields": (
+                    "pgh_id",
+                    "pgh_created_at",
+                    "pgh_label",
+                    "pgh_model",
+                    "pgh_obj_id",
                 )
             },
         ),
         (
-            'Context & Data',
+            "Context & Data",
             {
-                'fields': (
-                    'pgh_context',
-                    'pgh_data',
+                "fields": (
+                    "pgh_context",
+                    "pgh_data",
                 ),
-                'classes': ('collapse',),
+                "classes": ("collapse",),
             },
         ),
     )
@@ -392,7 +392,7 @@ class PgHistoryEventsAdmin(admin.ModelAdmin):
 
     def has_delete_permission(self, request, obj=None):
         """Prevent deletion of history events"""
-        return getattr(request.user, 'is_superuser', False)
+        return getattr(request.user, "is_superuser", False)
 
 
 # Register the models with their admin classes