fix: allow device-paired clients to retrieve TTS API keys (#14613)

* refactor: add config.get to READ_METHODS set

* refactor(gateway): scope talk secrets via talk.config

* fix: resolve rebase conflicts for talk scope refactor

---------

Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/gateway/server-methods-list.ts

@@ -29,6 +29,7 @@ const BASE_METHODS = [
   "wizard.next",
   "wizard.cancel",
   "wizard.status",
+  "talk.config",
   "talk.mode",
   "models.list",
   "agents.list",