test(app/e2e): cover project-settings error-UX paths (Cluster G3) (#731)

* test(app/e2e): cover 5 error-UX paths + host indicator + script removal for project settings

Add helpers/project-settings.ts DSL helpers and extend projects-settings.spec.ts
with 5 new tests covering the error paths dropped by PR #725:

- stale_project_config callout + disabled save + reload recovery
- invalid_project_config read callout + reload after fix
- write_failed callout + retry + reload recovery
- single-host static indicator vs picker chip
- script removal via kebab menu + confirm dialog

* refactor(app/e2e): unslop project-settings helpers and spec

- Fix removeProjectScript: derive trigger testID from row testID instead
  of using scoped locator (which was timing out)
- Extract inline writeFile call in invalid-config test to restorePaseoConfig helper
- Replace raw testID click in write_failed test with clickReloadProjectSettings
- Remove writeFile from spec imports; drop defensive ?? "" fallback

* test(app/e2e): add read-transport and offline no-target tests for project settings

- Add read-transport failure test: WS-level drop during readProjectConfig triggers
  read-transport-callout; Reload retries until WS reconnects and refetch succeeds.
- Add no-target test: WS drop after form load triggers NoEditableTarget via live
  connectionStatus check (useHostRuntimeSnapshot) on the selected host.
- Hoist openProjects/editWorktreeSetup from spec body into project-settings helper.
- Fix expectNoProjectSettingsError to accept optional timeout (needed for toPass loop).
- Add isHostGone to renderContent: after readQuery errors are checked, offline/error
  connectionStatus renders NoEditableTarget without unmounting ProjectSettingsBody.

* fixup(app/e2e): correct misleading comments on WS close → error-state mapping

packages/app/src/screens/project-settings-screen.tsx

@@ -71,6 +71,12 @@ export default function ProjectSettingsScreen({ projectKey }: ProjectSettingsScr
     }
   }, [editableHosts, selectedServerId]);
 
+  const selectedSnapshot = useHostRuntimeSnapshot(selectedServerId);
+  const isHostGone =
+    Boolean(selectedServerId) &&
+    (selectedSnapshot?.connectionStatus === "offline" ||
+      selectedSnapshot?.connectionStatus === "error");
+
   const selectedHost = editableHosts.find((host) => host.serverId === selectedServerId);
   const client = useHostRuntimeClient(selectedHost?.serverId ?? "");
 
@@ -85,6 +91,7 @@ export default function ProjectSettingsScreen({ projectKey }: ProjectSettingsScr
       selectedHost={selectedHost}
       onSelectHost={setSelectedServerId}
       client={client}
+      isHostGone={isHostGone}
     />
   );
 }
@@ -139,6 +146,7 @@ interface ProjectSettingsBodyProps {
   selectedHost: ProjectHostEntry;
   onSelectHost: (serverId: string) => void;
   client: DaemonClient;
+  isHostGone: boolean;
 }
 
 function ProjectSettingsBody({
@@ -147,6 +155,7 @@ function ProjectSettingsBody({
   selectedHost,
   onSelectHost,
   client,
+  isHostGone,
 }: ProjectSettingsBodyProps) {
   const queryKey = useMemo(
     () => ["project-config", selectedHost.serverId, selectedHost.repoRoot] as const,
@@ -192,6 +201,7 @@ function ProjectSettingsBody({
         client,
         onReload: handleReload,
         hasMultipleHosts,
+        isHostGone,
       })}
     </View>
   );
@@ -207,6 +217,7 @@ interface RenderContentInput {
   client: DaemonClient;
   onReload: () => void;
   hasMultipleHosts: boolean;
+  isHostGone: boolean;
 }
 
 function renderContent({
@@ -219,6 +230,7 @@ function renderContent({
   client,
   onReload,
   hasMultipleHosts,
+  isHostGone,
 }: RenderContentInput) {
   if (readQuery.isLoading) {
     return (
@@ -250,6 +262,10 @@ function renderContent({
     );
   }
 
+  if (isHostGone) {
+    return <NoEditableTarget />;
+  }
+
   if (!loadedConfig) {
     return (
       <View style={styles.centered}>