fix: move view-toggle-backlinks to simple event map for type safety

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/hooks/useMenuEvents.ts

@@ -57,6 +57,7 @@ const SIMPLE_EVENT_MAP: Record<string, SimpleHandler> = {
   'file-save': 'onSave',
   'app-settings': 'onOpenSettings',
   'view-toggle-properties': 'onToggleInspector',
+  'view-toggle-backlinks': 'onToggleInspector',
   'view-command-palette': 'onCommandPalette',
   'view-zoom-in': 'onZoomIn',
   'view-zoom-out': 'onZoomOut',
@@ -87,7 +88,6 @@ const OPTIONAL_EVENT_MAP: Record<string, OptionalHandler> = {
   'edit-toggle-raw-editor': 'onToggleRawEditor',
   'edit-toggle-diff': 'onToggleDiff',
   'view-toggle-ai-chat': 'onToggleAIChat',
-  'view-toggle-backlinks': 'onToggleInspector',
   'vault-open': 'onOpenVault',
   'vault-remove': 'onRemoveActiveVault',
   'vault-restore-getting-started': 'onRestoreGettingStarted',