feat: SEO field types and the complete SEO tab

controllers/settings.go

@@ -101,13 +101,21 @@ type stagingView struct {
 	Staging bool
 }
 
-// PartialData serves the staging callout: shown outside production, where
-// every page is noindex whatever the settings say (D-22).
-func (c settingsAdminController) PartialData(_ context.Context, name string, _ any) (any, error) {
-	if name != "staging" {
-		return nil, nil
+// PartialData serves the staging callout, shown outside production where
+// every page is noindex whatever the settings say (D-22), and the P3
+// placeholder table.
+func (c settingsAdminController) PartialData(ctx context.Context, name string, _ any) (any, error) {
+	switch name {
+	case "staging":
+		return stagingView{Staging: IsStaging(appOf(c.app))}, nil
+	case "placeholders":
+		svc, err := classes.NewService(appOf(c.app))
+		if err != nil {
+			return nil, err
+		}
+		return svc.Placeholders(ctx), nil
 	}
-	return stagingView{Staging: IsStaging(appOf(c.app))}, nil
+	return nil, nil
 }
 
 // IsStaging reports whether the application runs outside production. It