feat(audio): add listInputDevices + mic settings to API client (FR-CAP-7)

src/lib/api.ts

@@ -48,8 +48,9 @@ export interface HardwareStatus {
   directml?: { applicable: boolean; runtimeReady: boolean; modelInstalled: boolean };
 }
 
-// One enumerated render (playback) device — loopback capture only (FR-CAP-1),
-// no microphone picker since there's no microphone capture path.
+// One enumerated audio device — a render (playback) device for the loopback
+// picker (FR-CAP-1) or a capture (microphone) device for the mic picker
+// (FR-CAP-7). `id` is the persisted `Device::get_id()`; `name` is display-only.
 export interface AudioDeviceInfo {
   id: string;
   name: string;
@@ -293,6 +294,8 @@ export interface AppSettings {
   pst_last_path: string | null;
   pst_auto_sync: boolean;
   audio_output_device: string | null;
+  microphone_enabled: boolean;
+  audio_input_device: string | null;
 }
 
 // Feature brief — agent-ready spec distilled from a meeting (ADR-0011).
@@ -346,6 +349,7 @@ export const api = {
   openUrl: (url: string) => invoke<void>("open_url", { url }),
   hardwareStatus: () => invoke<HardwareStatus>("hardware_status"),
   listAudioDevices: () => invoke<AudioDeviceInfo[]>("list_audio_devices"),
+  listInputDevices: () => invoke<AudioDeviceInfo[]>("list_input_devices"),
   setPreferredBackend: (backend: BackendId | "auto") =>
     invoke<void>("set_preferred_backend", { args: { backend } }),
   downloadNpuPackage: () => invoke<void>("download_npu_package"),