refactor(ui): extract SessionBrowser search and navigation components

packages/cli/src/ui/components/SessionBrowser.tsx

@@ -110,78 +110,15 @@ const SESSIONS_PER_PAGE = 20;
 // If the SessionItem layout changes, update this accordingly.
 const FIXED_SESSION_COLUMNS_WIDTH = 30;
 
-const Kbd = ({ name, shortcut }: { name: string; shortcut: string }) => (
-  <>
-    {name}: <Text bold>{shortcut}</Text>
-  </>
-);
-
+import { SearchModeDisplay } from './SessionBrowser/SearchModeDisplay.js';
+import { NavigationHelp } from './SessionBrowser/NavigationHelp.js';
+import { SessionListHeader } from './SessionBrowser/SessionListHeader.js';
+import { NoResultsDisplay } from './SessionBrowser/NoResultsDisplay.js';
 import { SessionBrowserLoading } from './SessionBrowser/SessionBrowserLoading.js';
 import { SessionBrowserError } from './SessionBrowser/SessionBrowserError.js';
 import { SessionBrowserEmpty } from './SessionBrowser/SessionBrowserEmpty.js';
-
 import { sortSessions, filterSessions } from './SessionBrowser/utils.js';
 
-/**
- * Search input display component.
- */
-const SearchModeDisplay = ({
-  state,
-}: {
-  state: SessionBrowserState;
-}): React.JSX.Element => (
-  <Box marginTop={1}>
-    <Text color={Colors.Gray}>Search: </Text>
-    <Text color={Colors.AccentPurple}>{state.searchQuery}</Text>
-    <Text color={Colors.Gray}> (Esc to cancel)</Text>
-  </Box>
-);
-
-/**
- * Header component showing session count and sort information.
- */
-const SessionListHeader = ({
-  state,
-}: {
-  state: SessionBrowserState;
-}): React.JSX.Element => (
-  <Box flexDirection="row" justifyContent="space-between">
-    <Text color={Colors.AccentPurple}>
-      Chat Sessions ({state.totalSessions} total
-      {state.searchQuery ? `, filtered` : ''})
-    </Text>
-    <Text color={Colors.Gray}>
-      sorted by {state.sortOrder} {state.sortReverse ? 'asc' : 'desc'}
-    </Text>
-  </Box>
-);
-
-/**
- * Navigation help component showing keyboard shortcuts.
- */
-const NavigationHelp = (): React.JSX.Element => (
-  <Box flexDirection="column">
-    <Text color={Colors.Gray}>
-      <Kbd name="Navigate" shortcut="↑/↓" />
-      {'   '}
-      <Kbd name="Resume" shortcut="Enter" />
-      {'   '}
-      <Kbd name="Search" shortcut="/" />
-      {'   '}
-      <Kbd name="Delete" shortcut="x" />
-      {'   '}
-      <Kbd name="Quit" shortcut="q" />
-    </Text>
-    <Text color={Colors.Gray}>
-      <Kbd name="Sort" shortcut="s" />
-      {'         '}
-      <Kbd name="Reverse" shortcut="r" />
-      {'      '}
-      <Kbd name="First/Last" shortcut="g/G" />
-    </Text>
-  </Box>
-);
-
 /**
  * Table header component with column labels and scroll indicators.
  */
@@ -219,21 +156,6 @@ const SessionTableHeader = ({
   </Box>
 );
 
-/**
- * No results display component for empty search results.
- */
-const NoResultsDisplay = ({
-  state,
-}: {
-  state: SessionBrowserState;
-}): React.JSX.Element => (
-  <Box marginTop={1}>
-    <Text color={Colors.Gray} dimColor>
-      No sessions found matching &apos;{state.searchQuery}&apos;.
-    </Text>
-  </Box>
-);
-
 /**
  * Match snippet display component for search results.
  */

packages/cli/src/ui/components/SessionBrowser/NavigationHelp.tsx

@@ -0,0 +1,41 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import type React from 'react';
+import { Box, Text } from 'ink';
+import { Colors } from '../../colors.js';
+
+const Kbd = ({ name, shortcut }: { name: string; shortcut: string }) => (
+  <>
+    {name}: <Text bold>{shortcut}</Text>
+  </>
+);
+
+/**
+ * Navigation help component showing keyboard shortcuts.
+ */
+export const NavigationHelp = (): React.JSX.Element => (
+  <Box flexDirection="column">
+    <Text color={Colors.Gray}>
+      <Kbd name="Navigate" shortcut="↑/↓" />
+      {'   '}
+      <Kbd name="Resume" shortcut="Enter" />
+      {'   '}
+      <Kbd name="Search" shortcut="/" />
+      {'   '}
+      <Kbd name="Delete" shortcut="x" />
+      {'   '}
+      <Kbd name="Quit" shortcut="q" />
+    </Text>
+    <Text color={Colors.Gray}>
+      <Kbd name="Sort" shortcut="s" />
+      {'         '}
+      <Kbd name="Reverse" shortcut="r" />
+      {'      '}
+      <Kbd name="First/Last" shortcut="g/G" />
+    </Text>
+  </Box>
+);

packages/cli/src/ui/components/SessionBrowser/NoResultsDisplay.tsx

@@ -0,0 +1,25 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import type React from 'react';
+import { Box, Text } from 'ink';
+import { Colors } from '../../colors.js';
+import type { SessionBrowserState } from '../SessionBrowser.js';
+
+/**
+ * No results display component for empty search results.
+ */
+export const NoResultsDisplay = ({
+  state,
+}: {
+  state: SessionBrowserState;
+}): React.JSX.Element => (
+  <Box marginTop={1}>
+    <Text color={Colors.Gray} dimColor>
+      No sessions found matching &apos;{state.searchQuery}&apos;.
+    </Text>
+  </Box>
+);

packages/cli/src/ui/components/SessionBrowser/SearchModeDisplay.tsx

@@ -0,0 +1,25 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import type React from 'react';
+import { Box, Text } from 'ink';
+import { Colors } from '../../colors.js';
+import type { SessionBrowserState } from '../SessionBrowser.js';
+
+/**
+ * Search input display component.
+ */
+export const SearchModeDisplay = ({
+  state,
+}: {
+  state: SessionBrowserState;
+}): React.JSX.Element => (
+  <Box marginTop={1}>
+    <Text color={Colors.Gray}>Search: </Text>
+    <Text color={Colors.AccentPurple}>{state.searchQuery}</Text>
+    <Text color={Colors.Gray}> (Esc to cancel)</Text>
+  </Box>
+);

packages/cli/src/ui/components/SessionBrowser/SessionBrowserSearchNav.test.tsx

@@ -0,0 +1,68 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// import type React from 'react';
+import { render } from '../../../test-utils/render.js';
+import { describe, it, expect } from 'vitest';
+import { SearchModeDisplay } from './SearchModeDisplay.js';
+import { NavigationHelp } from './NavigationHelp.js';
+import { SessionListHeader } from './SessionListHeader.js';
+import { NoResultsDisplay } from './NoResultsDisplay.js';
+import type { SessionBrowserState } from '../SessionBrowser.js';
+
+describe('SessionBrowser Search and Navigation Components', () => {
+  it('SearchModeDisplay renders correctly with query', async () => {
+    const mockState = { searchQuery: 'test query' } as SessionBrowserState;
+    const { lastFrame, waitUntilReady } = render(
+      <SearchModeDisplay state={mockState} />,
+    );
+    await waitUntilReady();
+    expect(lastFrame()).toMatchSnapshot();
+  });
+
+  it('NavigationHelp renders correctly', async () => {
+    const { lastFrame, waitUntilReady } = render(<NavigationHelp />);
+    await waitUntilReady();
+    expect(lastFrame()).toMatchSnapshot();
+  });
+
+  it('SessionListHeader renders correctly', async () => {
+    const mockState = {
+      totalSessions: 10,
+      searchQuery: '',
+      sortOrder: 'date',
+      sortReverse: false,
+    } as SessionBrowserState;
+    const { lastFrame, waitUntilReady } = render(
+      <SessionListHeader state={mockState} />,
+    );
+    await waitUntilReady();
+    expect(lastFrame()).toMatchSnapshot();
+  });
+
+  it('SessionListHeader renders correctly with filter', async () => {
+    const mockState = {
+      totalSessions: 5,
+      searchQuery: 'test',
+      sortOrder: 'name',
+      sortReverse: true,
+    } as SessionBrowserState;
+    const { lastFrame, waitUntilReady } = render(
+      <SessionListHeader state={mockState} />,
+    );
+    await waitUntilReady();
+    expect(lastFrame()).toMatchSnapshot();
+  });
+
+  it('NoResultsDisplay renders correctly', async () => {
+    const mockState = { searchQuery: 'no match' } as SessionBrowserState;
+    const { lastFrame, waitUntilReady } = render(
+      <NoResultsDisplay state={mockState} />,
+    );
+    await waitUntilReady();
+    expect(lastFrame()).toMatchSnapshot();
+  });
+});

packages/cli/src/ui/components/SessionBrowser/SessionListHeader.tsx

@@ -0,0 +1,29 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import type React from 'react';
+import { Box, Text } from 'ink';
+import { Colors } from '../../colors.js';
+import type { SessionBrowserState } from '../SessionBrowser.js';
+
+/**
+ * Header component showing session count and sort information.
+ */
+export const SessionListHeader = ({
+  state,
+}: {
+  state: SessionBrowserState;
+}): React.JSX.Element => (
+  <Box flexDirection="row" justifyContent="space-between">
+    <Text color={Colors.AccentPurple}>
+      Chat Sessions ({state.totalSessions} total
+      {state.searchQuery ? `, filtered` : ''})
+    </Text>
+    <Text color={Colors.Gray}>
+      sorted by {state.sortOrder} {state.sortReverse ? 'asc' : 'desc'}
+    </Text>
+  </Box>
+);

packages/cli/src/ui/components/SessionBrowser/__snapshots__/SessionBrowserSearchNav.test.tsx.snap

@@ -0,0 +1,29 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`SessionBrowser Search and Navigation Components > NavigationHelp renders correctly 1`] = `
+"Navigate: ↑/↓   Resume: Enter   Search: /   Delete: x   Quit: q
+Sort: s         Reverse: r      First/Last: g/G
+"
+`;
+
+exports[`SessionBrowser Search and Navigation Components > NoResultsDisplay renders correctly 1`] = `
+"
+No sessions found matching 'no match'.
+"
+`;
+
+exports[`SessionBrowser Search and Navigation Components > SearchModeDisplay renders correctly with query 1`] = `
+"
+Search: test query (Esc to cancel)
+"
+`;
+
+exports[`SessionBrowser Search and Navigation Components > SessionListHeader renders correctly 1`] = `
+"Chat Sessions (10 total)                                                         sorted by date desc
+"
+`;
+
+exports[`SessionBrowser Search and Navigation Components > SessionListHeader renders correctly with filter 1`] = `
+"Chat Sessions (5 total, filtered)                                                 sorted by name asc
+"
+`;