test(app,server): align e2e specs with settings redesign, drop rg dep

- worktree-core test scans the server source via a pure Node walker
  instead of shelling out to `rg`, which is not installed on CI runners.
  Invariant and scope are unchanged.
- settings-host-page specs target the new detail-header label + rename
  affordance (settings-detail-header-title / host-page-label-edit-button)
  since the label card moved into the shared header as part of the
  modular settings refactor.
- settings-navigation compact tests assert the new two-tier Back
  semantics: root Back exits settings, detail Back returns to /settings.

packages/app/e2e/settings-host-page.spec.ts

@@ -23,6 +23,12 @@ async function openHostPage(page: Page, serverId: string) {
   await expect(page.getByTestId(`settings-host-page-${serverId}`)).toBeVisible();
 }
 
+async function expectHostLabelHeader(page: Page) {
+  await expect(page.getByTestId("settings-detail-header-title")).toHaveText(TEST_HOST_LABEL);
+  await expect(page.getByTestId("host-page-label-edit-button")).toBeVisible();
+  await expect(page.getByTestId("host-page-label-input")).toHaveCount(0);
+}
+
 test.describe("Settings host page", () => {
   test("host page shows seeded label, connection endpoint, inject MCP toggle, and all action rows", async ({
     page,
@@ -34,16 +40,8 @@ test.describe("Settings host page", () => {
     await openSettings(page);
     await openHostPage(page, serverId);
 
-    // Label renders as a title with a pencil edit affordance; the input is hidden until edit.
+    // Label renders in the detail header with a pencil edit affordance; the input is hidden until edit.
-    await expect(page.getByTestId("host-page-label-card")).toBeVisible();
+    await expectHostLabelHeader(page);
-    await expect(page.getByTestId("host-page-label-edit-button")).toBeVisible();
-    await expect(page.getByTestId("host-page-label-input")).toHaveCount(0);
-    await expect(
-      page.getByTestId("host-page-label-card").getByText(TEST_HOST_LABEL, { exact: true }),
-    ).toBeVisible();
-
-    // Desktop detail pane shows a ScreenHeader with the host label.
-    await expect(page.getByTestId("settings-detail-header-title")).toHaveText(TEST_HOST_LABEL);
 
     // Connections is its own section with a "Connections" heading and the seeded endpoint row.
     const connectionsCard = page.getByTestId("host-page-connections-card");
@@ -124,7 +122,7 @@ test.describe("Settings host page", () => {
     await page.goto(`/settings/hosts/${encodeURIComponent(serverId)}`);
 
     await expect(page.getByTestId(`settings-host-page-${serverId}`)).toBeVisible();
-    await expect(page.getByTestId("host-page-label-card")).toBeVisible();
+    await expectHostLabelHeader(page);
     await expect(page.getByTestId("host-page-remove-host-card")).toBeVisible();
   });
 

packages/app/e2e/settings-navigation.spec.ts

@@ -93,6 +93,15 @@ test.describe("Settings — compact master-detail", () => {
     await expect(page.getByTestId("settings-sidebar")).toBeVisible();
   }
 
+  async function expectCompactSettingsRootList(page: Page) {
+    await expect(page).toHaveURL(/\/settings$/);
+    await expect(page.getByTestId("settings-sidebar")).toBeVisible();
+
+    await expect(page.getByText("Theme", { exact: true })).toHaveCount(0);
+    await expect(page.getByRole("button", { name: "Play test" })).toHaveCount(0);
+    await expect(page.locator('[data-testid^="settings-host-page-"]')).toHaveCount(0);
+  }
+
   test("/settings renders only the sidebar list (no section content)", async ({ page }) => {
     await openCompactSettingsRoot(page);
 
@@ -110,12 +119,12 @@ test.describe("Settings — compact master-detail", () => {
     ).toBeVisible();
 
     // Section detail content is NOT rendered at the root.
-    await expect(page.getByText("Theme", { exact: true })).toHaveCount(0);
+    await expectCompactSettingsRootList(page);
-    await expect(page.getByRole("button", { name: "Play test" })).toHaveCount(0);
-    await expect(page.getByTestId("host-page-label-card")).toHaveCount(0);
 
-    // Root shows the menu header, not a back button.
+    const rootBackButton = page.getByRole("button", { name: "Back", exact: true });
-    await expect(page.getByRole("button", { name: "Back", exact: true })).toHaveCount(0);
+    await expect(rootBackButton).toBeVisible();
+    await rootBackButton.click();
+    await expect(page).not.toHaveURL(/\/settings(\/|$)/);
   });
 
   test("tapping a section pushes /settings/[section] and shows a back button", async ({ page }) => {
@@ -144,9 +153,8 @@ test.describe("Settings — compact master-detail", () => {
     await expect(page).toHaveURL(/\/settings\/about$/);
 
     await page.getByRole("button", { name: "Back", exact: true }).click();
-    await expect(page).toHaveURL(/\/settings$/);
+    await expectCompactSettingsRootList(page);
-    await expect(page.getByTestId("settings-sidebar")).toBeVisible();
+    await expect(page.getByRole("button", { name: "Back", exact: true })).toBeVisible();
-    await expect(page.getByRole("button", { name: "Back", exact: true })).toHaveCount(0);
   });
 
   test("tapping a host entry pushes /settings/hosts/[serverId]", async ({ page }) => {

packages/server/src/server/worktree-core.test.ts

@@ -1,5 +1,13 @@
 import { execSync } from "node:child_process";
-import { existsSync, mkdtempSync, realpathSync, rmSync, writeFileSync } from "node:fs";
+import {
+  existsSync,
+  mkdtempSync,
+  readdirSync,
+  readFileSync,
+  realpathSync,
+  rmSync,
+  writeFileSync,
+} from "node:fs";
 import { tmpdir } from "node:os";
 import path from "node:path";
 import { fileURLToPath } from "node:url";
@@ -45,6 +53,42 @@ function createCoreDeps(options?: {
   };
 }
 
+function findDirectCreateWorktreeCallSites(serverSrc: string): string[] {
+  const matches: string[] = [];
+
+  function walk(directory: string) {
+    for (const entry of readdirSync(directory, { withFileTypes: true })) {
+      const absolutePath = path.join(directory, entry.name);
+
+      if (entry.isDirectory()) {
+        walk(absolutePath);
+        continue;
+      }
+
+      if (!entry.isFile()) {
+        continue;
+      }
+
+      const relativePath = path
+        .relative(serverSrc, absolutePath)
+        .split(path.sep)
+        .join(path.posix.sep);
+
+      if (relativePath === "utils/worktree.ts" || relativePath.endsWith(".test.ts")) {
+        continue;
+      }
+
+      // Keep this literal in the test file so the invariant proves tests are allowed to inspect createWorktree(.
+      if (/createWorktree\(/.test(readFileSync(absolutePath, "utf8"))) {
+        matches.push(relativePath);
+      }
+    }
+  }
+
+  walk(serverSrc);
+  return matches.sort();
+}
+
 function createGitRepo(): { tempDir: string; repoDir: string; paseoHome: string } {
   const tempDir = realpathSync(mkdtempSync(path.join(tmpdir(), "worktree-core-test-")));
   const repoDir = path.join(tempDir, "repo");
@@ -435,21 +479,6 @@ describe.skipIf(process.platform === "win32")("createWorktreeCore", () => {
 
   test("keeps direct createWorktree calls isolated to the core layer", () => {
     const serverSrc = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
-    // Keep this literal in the test file so the invariant proves tests are allowed to inspect createWorktree(.
+    expect(findDirectCreateWorktreeCallSites(serverSrc)).toEqual(["server/worktree-core.ts"]);
-    const output = execSync(
-      "rg --files-with-matches 'createWorktree\\(' . --glob '!**/utils/worktree.ts' --glob '!**/*.test.ts'",
-      {
-        cwd: serverSrc,
-        stdio: "pipe",
-      },
-    )
-      .toString()
-      .trim()
-      .split("\n")
-      .map((line) => line.replace(/^\.\//, ""))
-      .filter(Boolean)
-      .sort();
-
-    expect(output).toEqual(["server/worktree-core.ts"]);
   });
 });