Mobile companion app + paired-device backend

New iOS-first companion (Expo SDK 54 + NativeWind v4) with three tabs:
Captures (the hero — floating gold mic, live mic-meter waveform,
expand-row playback), Generate (profile picker + speak + autoplay +
recent), and Voices (searchable profile list).

Pairing (V0): backend mints a one-time token, mobile scans/pastes the
voicebox:// URL, server returns a long-lived bearer it stores only as a
SHA-256 hash. Bearer-or-loopback auth applied to every user-data router
so binding 0.0.0.0 doesn't leak existing endpoints. Loopback callers
(the desktop app) keep their friction-free access.

Desktop Settings → Mobile pane: live host picker (LAN / Tailscale auto-
detected via the App-bundle binary path on macOS), QR rendering,
5-minute expiry countdown, copyable URL fallback, paired-device list
with revoke. Auto-closes when a new device pairs.

just dev now binds the backend to 0.0.0.0 so paired phones can reach
it — and just setup-python pins mlx-audio==0.4.1 + mlx-lm so fresh
Apple Silicon worktrees get a working STT path on first install.

app/src/router.tsx

@@ -18,6 +18,7 @@ import { GenerationPage } from '@/components/ServerTab/GenerationPage';
 import { GpuPage } from '@/components/ServerTab/GpuPage';
 import { LogsPage } from '@/components/ServerTab/LogsPage';
 import { MCPPage } from '@/components/ServerTab/MCPPage';
+import { MobilePage } from '@/components/ServerTab/MobilePage';
 import { SettingsLayout } from '@/components/ServerTab/ServerTab';
 import { Sidebar } from '@/components/Sidebar';
 import { StoriesTab } from '@/components/StoriesTab/StoriesTab';
@@ -166,6 +167,12 @@ const settingsMCPRoute = createRoute({
   component: MCPPage,
 });
 
+const settingsMobileRoute = createRoute({
+  getParentRoute: () => settingsRoute,
+  path: '/mobile',
+  component: MobilePage,
+});
+
 const settingsGpuRoute = createRoute({
   getParentRoute: () => settingsRoute,
   path: '/gpu',
@@ -212,6 +219,7 @@ const routeTree = rootRoute.addChildren([
     settingsGenerationRoute,
     settingsCapturesRoute,
     settingsMCPRoute,
+    settingsMobileRoute,
     settingsGpuRoute,
     settingsLogsRoute,
     settingsChangelogRoute,