Dashboards: Add restricted extension point for empty state (#111788)

* Dashboards: Add restricted extension point for empty state

* FeatureToggles: Regenerate files with new toggle

* Dashboards: Pass default empty UI as component, not children

* Dashboards: Expose hooks for empty state methods to extensions

* Dashboards: Move empty state button hooks to dedicated file

* Dashboards: Render loader while empty state plugin components loading

* Dashboards: Pass empty state default UI as method

* Dashboards: De-duplicate hook usages in empty state

* Dashboards: De-duplicate read-only repo check in empty state

pkg/services/featuremgmt/registry.go

@@ -1891,6 +1891,16 @@ var (
 			FrontendOnly:      true,
 			Expression:        "false", // extensions will be disabled by default
 		},
+		{
+			Name:              "enableDashboardEmptyExtensions",
+			Description:       "Set this to true to enable all dashboard empty state extensions registered by plugins.",
+			Stage:             FeatureStageExperimental,
+			Owner:             grafanaDashboardsSquad,
+			HideFromAdminPage: true,
+			HideFromDocs:      true,
+			FrontendOnly:      true,
+			Expression:        "false", // extensions will be disabled by default
+		},
 		{
 			Name:              "foldersAppPlatformAPI",
 			Description:       "Enables use of app platform API for folders",

pkg/services/featuremgmt/toggles_gen.csv

@@ -244,6 +244,7 @@ preferLibraryPanelTitle,privatePreview,@grafana/dashboards-squad,false,false,fal
 tabularNumbers,GA,@grafana/grafana-frontend-platform,false,false,false
 newInfluxDSConfigPageDesign,privatePreview,@grafana/partner-datasources,false,false,false
 enableAppChromeExtensions,experimental,@grafana/plugins-platform-backend,false,false,true
+enableDashboardEmptyExtensions,experimental,@grafana/dashboards-squad,false,false,true
 foldersAppPlatformAPI,experimental,@grafana/grafana-search-navigate-organise,false,false,true
 enablePluginImporter,experimental,@grafana/plugins-platform-backend,false,false,true
 otelLogsFormatting,experimental,@grafana/observability-logs,false,false,true

pkg/services/featuremgmt/toggles_gen.go

@@ -986,6 +986,10 @@ const (
 	// Set this to true to enable all app chrome extensions registered by plugins.
 	FlagEnableAppChromeExtensions = "enableAppChromeExtensions"
 
+	// FlagEnableDashboardEmptyExtensions
+	// Set this to true to enable all dashboard empty state extensions registered by plugins.
+	FlagEnableDashboardEmptyExtensions = "enableDashboardEmptyExtensions"
+
 	// FlagFoldersAppPlatformAPI
 	// Enables use of app platform API for folders
 	FlagFoldersAppPlatformAPI = "foldersAppPlatformAPI"

pkg/services/featuremgmt/toggles_gen.json

@@ -1383,6 +1383,22 @@
         "expression": "false"
       }
     },
+    {
+      "metadata": {
+        "name": "enableDashboardEmptyExtensions",
+        "resourceVersion": "1759194774156",
+        "creationTimestamp": "2025-09-30T01:12:54Z"
+      },
+      "spec": {
+        "description": "Set this to true to enable all dashboard empty state extensions registered by plugins.",
+        "stage": "experimental",
+        "codeowner": "@grafana/dashboards-squad",
+        "frontend": true,
+        "hideFromAdminPage": true,
+        "hideFromDocs": true,
+        "expression": "false"
+      }
+    },
     {
       "metadata": {
         "name": "enableDatagridEditing",