fix(app/e2e): fix composer-lock test — mock provider + prompt so lock releases (#739)

* fix(app/e2e): fix composer-lock test — use mock provider + prompt so lock releases

Two bugs in the "composer is locked while new workspace agent is being
created" test:

1. expectComposerDisabled used toBeDisabled() but React Native TextInput
   with editable={false} renders as <textarea readonly> on web, not
   <textarea disabled>. Fixed to not.toBeEditable().

2. clickNewWorkspaceButton created an agent with no prompt, leaving the
   agent permanently "idle". showPendingCreateSubmitLoading only clears
   when authoritativeStatus is non-bootstrapping, but "idle" counts as
   bootstrapping — so the composer lock never released. Fixed by opening
   the new-workspace composer, filling a prompt, then clicking Create so
   the mock agent transitions to "running" after agent_created is released.

Also switches buildCreateAgentPreferences to provider "mock" with the
ten-second-stream model so E2E tests exercise app behavior without
depending on real provider availability.

* fix(app): add aria-checked to Switch for E2E toBeChecked() assertions

React Native Web does not map accessibilityState.checked to aria-checked
for role="switch", so Playwright's toBeChecked() always finds the element
unchecked. Adding aria-checked={value} directly to the Pressable sets the
attribute explicitly.

Update the switch.test.tsx mock to accept and pass through the explicit
aria-checked prop, keeping the mock faithful to the fixed component.

packages/app/e2e/helpers/daemon-registry.ts

@@ -30,10 +30,15 @@ export function buildSeededHost(input: {
   };
 }
 
+export const TEST_MOCK_PROVIDER_PREFERENCES = {
+  ...TEST_PROVIDER_PREFERENCES,
+  mock: { model: "ten-second-stream" },
+} as const;
+
 export function buildCreateAgentPreferences(serverId: string) {
   return {
     serverId,
-    provider: "codex" as const,
-    providerPreferences: TEST_PROVIDER_PREFERENCES,
+    provider: "mock" as const,
+    providerPreferences: TEST_MOCK_PROVIDER_PREFERENCES,
   };
 }