feat(inbox): add operator search and keyboard controls

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/shared/src/validators/instance.ts

@@ -4,6 +4,7 @@ import { feedbackDataSharingPreferenceSchema } from "./feedback.js";
 
 export const instanceGeneralSettingsSchema = z.object({
   censorUsernameInLogs: z.boolean().default(false),
+  keyboardShortcuts: z.boolean().default(false),
   feedbackDataSharingPreference: feedbackDataSharingPreferenceSchema.default(
     DEFAULT_FEEDBACK_DATA_SHARING_PREFERENCE,
   ),