Add feature opt-ins, dashboard view, and tests

Introduce feature_interests schema + realtime publication and surface opt-in trends in the admin dashboard. Add Jest test infrastructure/coverage for the mobile app and update push-all to run mobile checks before pushing.

Co-authored-by: Claude Code <claude@anthropic.com>

apps/mobile/src/test/test-utils.tsx

@@ -0,0 +1,30 @@
+import React, { PropsWithChildren } from 'react';
+import {
+    render as rtlRender,
+    RenderOptions,
+} from '@testing-library/react-native';
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+
+export function createTestQueryClient() {
+    return new QueryClient({
+        defaultOptions: {
+            queries: {
+                retry: false,
+            },
+            mutations: {
+                retry: false,
+            },
+        },
+    });
+}
+
+export function TestProviders({ children }: PropsWithChildren) {
+    const queryClient = createTestQueryClient();
+    return <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>;
+}
+
+export function render(ui: React.ReactElement, options?: RenderOptions) {
+    return rtlRender(ui, { wrapper: TestProviders, ...options });
+}
+
+export * from '@testing-library/react-native';