feat(settings): configure Jev evaluation and model transitions

apps/desktop/electron/preload.ts

@@ -295,6 +295,8 @@ contextBridge.exposeInMainWorld('hermesDesktop', {
   ...(process.platform === 'win32'
     ? {
         codexLink: {
+          getStagedTransition: () => ipcRenderer.invoke('aiturk:staged-transition:get'),
+          setStagedTransition: patch => ipcRenderer.invoke('aiturk:staged-transition:set', patch),
           get: () => ipcRenderer.invoke('aiturk:codex-link:get'),
           set: patch => ipcRenderer.invoke('aiturk:codex-link:set', patch)
         }