fix(mobile): route phone APIs to selected profile and unblock runtime readiness

apps/desktop/electron/mobile-backend.ts

@@ -0,0 +1,18 @@
+/** Mobile routing is explicit and cannot start a first-run installer. */
+export function createMobileBackendResolver<Connection extends { mode: string; baseUrl: string; token: string }>({
+  isRemote,
+  runtimeNeedsInstall,
+  ensureBackend
+}: {
+  isRemote: (profile: string) => boolean
+  runtimeNeedsInstall: (profile: string) => boolean
+  ensureBackend: (profile: string) => Promise<Connection>
+}) {
+  return async (profile: string) => {
+    if (isRemote(profile)) throw new Error('aiturk-mobile:remote_mode')
+    if (runtimeNeedsInstall(profile)) throw new Error('aiturk-mobile:runtime_not_ready')
+    const connection = await ensureBackend(profile)
+    if (connection.mode !== 'local' || isRemote(profile)) throw new Error('aiturk-mobile:remote_mode')
+    return { baseUrl: connection.baseUrl, token: connection.token }
+  }
+}