Surface workspace changes from agent panes (#3682)

* feat(app): refine workspace pane actions

Prioritize Changes when available, keep Files useful before a selection, and reserve desktop diff clicks for selection so comments require the explicit affordance. Move the Changes shortcut to Shift+G to avoid consuming a likely copy variant.

* feat(app): improve access to workspace changes

docs/side-panel.md

@@ -83,7 +83,9 @@ Running and successful setup never seed tabs.
 persisted in client app settings as `openSupportingTabsInSidePanel`. Off means new
 supporting tabs land in the focused pane instead. Mobile ignores it. Explicit actions
 — the header toggle, a pane's `+` menu, the empty-state launcher — are never subject
-to it.
+to it. The Changes keyboard shortcut and the diff-stat pill above an agent composer are
+supporting opens: they follow the preference and focus an existing Changes tab wherever
+the user left it.
 
 ## The name
 

packages/app/e2e/browser/changes-pane.spec.ts

@@ -996,6 +996,23 @@ test("canvas diff creates, edits, and deletes an inline review without DOM code
   await expect(page.locator('[data-testid^="diff-code-row-"]')).toHaveCount(0);
 });
 
+test("autofocusing an inline review keeps the Changes tab focused", async ({ page }) => {
+  const workspace = await createWorkspaceWithMountedTabDiff();
+  await useUnwrappedDiffLines(page);
+  await openWorkspaceChanges(page, workspace);
+
+  const changesTab = page.getByTestId("workspace-tab-working_diff").filter({ visible: true });
+  const focusedBackground = await changesTab.evaluate(
+    (element) => getComputedStyle(element).backgroundColor,
+  );
+
+  await startReviewOnFirstChangedLine(page);
+  await expect(page.getByTestId("inline-review-editor-input")).toBeFocused();
+  await expect
+    .poll(() => changesTab.evaluate((element) => getComputedStyle(element).backgroundColor))
+    .toBe(focusedBackground);
+});
+
 test("split canvas creates a review on the changed side and keeps it in that column", async ({
   page,
 }) => {
@@ -1095,7 +1112,7 @@ test("canvas diff copies a dragged character selection without opening a review"
   await expect(page.getByTestId("inline-review-editor")).toHaveCount(0);
 });
 
-test("the first click after a canvas selection only dismisses the selection", async ({ page }) => {
+test("clicking the canvas dismisses a selection without opening a review", async ({ page }) => {
   const workspace = await createWorkspaceWithExactSelectionDiff("ABCDEFGHIJ");
   await useUnwrappedDiffLines(page);
   await openSelectionWorkspaceChanges(page, workspace);
@@ -1105,7 +1122,7 @@ test("the first click after a canvas selection only dismisses the selection", as
   await expect(page.getByTestId("inline-review-editor")).toHaveCount(0);
 
   await clickFirstChangedLine(page);
-  await expect(page.getByTestId("inline-review-editor")).toBeVisible();
+  await expect(page.getByTestId("inline-review-editor")).toHaveCount(0);
 });
 
 test("canvas diff replaces a selection with forward and backward drags", async ({
@@ -1537,7 +1554,8 @@ async function startReviewOnFirstChangedLine(
   if (!bodyBounds) throw new Error("Expanded diff body has no bounds");
   const lineHeight = Math.round(fontSize * 1.5);
   const columnLeft = side === "right" ? bodyBounds.x + bodyBounds.width / 2 : bodyBounds.x;
-  await page.mouse.click(columnLeft + 20, bodyBounds.y + lineHeight * 1.5);
+  await page.mouse.move(columnLeft + 20, bodyBounds.y + lineHeight * 1.5);
+  await page.getByRole("button", { name: "Add review comment" }).click();
   await expect(page.getByTestId("inline-review-editor")).toBeVisible();
 }
 

packages/app/e2e/browser/changes-shortcut-placement.spec.ts

@@ -0,0 +1,58 @@
+import { expect, test, type Page } from "../support/fixtures";
+import { gotoWorkspace } from "../support/helpers/launcher";
+import { seedWorkspace } from "../support/helpers/seed-client";
+import { waitForWorkspaceTabsVisible } from "../support/helpers/workspace-tabs";
+
+const APP_SETTINGS_KEY = "@paseo:app-settings";
+const CHANGES_SHORTCUT = `${process.platform === "darwin" ? "Meta" : "Control"}+Shift+G`;
+
+function mainPane(page: Page) {
+  return page.getByTestId("workspace-pane-main").filter({ visible: true });
+}
+
+function sidePanel(page: Page) {
+  return page.getByTestId("workspace-side-panel").filter({ visible: true });
+}
+
+test("Changes shortcut follows the default Side panel placement", async ({ page }) => {
+  const workspace = await seedWorkspace({ repoPrefix: "changes-shortcut-side-" });
+
+  try {
+    await page.setViewportSize({ width: 1400, height: 900 });
+    await gotoWorkspace(page, workspace.workspaceId);
+    await waitForWorkspaceTabsVisible(page);
+
+    await page.keyboard.press(CHANGES_SHORTCUT);
+
+    await expect(sidePanel(page).getByTestId("workspace-tab-working_diff")).toBeVisible({
+      timeout: 30_000,
+    });
+    await expect(mainPane(page).getByTestId("workspace-tab-working_diff")).toHaveCount(0);
+  } finally {
+    await workspace.cleanup();
+  }
+});
+
+test("Changes shortcut uses the focused pane when Side panel placement is off", async ({
+  page,
+}) => {
+  await page.addInitScript((settingsKey) => {
+    localStorage.setItem(settingsKey, JSON.stringify({ openSupportingTabsInSidePanel: false }));
+  }, APP_SETTINGS_KEY);
+  const workspace = await seedWorkspace({ repoPrefix: "changes-shortcut-pane-" });
+
+  try {
+    await page.setViewportSize({ width: 1400, height: 900 });
+    await gotoWorkspace(page, workspace.workspaceId);
+    await waitForWorkspaceTabsVisible(page);
+
+    await page.keyboard.press(CHANGES_SHORTCUT);
+
+    await expect(mainPane(page).getByTestId("workspace-tab-working_diff")).toBeVisible({
+      timeout: 30_000,
+    });
+    await expect(sidePanel(page)).toHaveCount(0);
+  } finally {
+    await workspace.cleanup();
+  }
+});

packages/app/e2e/browser/composer-diff-stat.spec.ts

@@ -0,0 +1,92 @@
+import { rm, writeFile } from "node:fs/promises";
+import path from "node:path";
+import { expect, test, type Page } from "../support/fixtures";
+import { openAgentRoute, seedMockAgentWorkspace } from "../support/helpers/mock-agent";
+
+const APP_SETTINGS_KEY = "@paseo:app-settings";
+
+function visibleMainPane(page: Page) {
+  return page.getByTestId("workspace-pane-main").filter({ visible: true });
+}
+
+async function seedChangedAgent(repoPrefix: string) {
+  const workspace = await seedMockAgentWorkspace({
+    repoPrefix,
+    title: "Composer diff stat",
+    repo: { withRemote: true },
+  });
+  try {
+    await rm(path.join(workspace.cwd, "remote.git"), { recursive: true });
+    await writeFile(
+      path.join(workspace.cwd, "README.md"),
+      "# Temp Repo\nexport const one = 1;\nexport const two = 2;\n",
+    );
+    await workspace.client.checkoutRefresh(workspace.cwd);
+    await expect
+      .poll(async () => {
+        const workspaces = await workspace.client.fetchWorkspaces();
+        return (
+          workspaces.entries.find((entry) => entry.id === workspace.workspaceId)?.diffStat ?? null
+        );
+      })
+      .toEqual({ additions: 2, deletions: 0 });
+    return workspace;
+  } catch (error) {
+    await workspace.cleanup();
+    throw error;
+  }
+}
+
+test("composer diff stat opens Changes in the preferred Side panel", async ({ page }) => {
+  const workspace = await seedChangedAgent("composer-diff-stat-side-");
+
+  try {
+    await page.setViewportSize({ width: 1400, height: 900 });
+    await openAgentRoute(page, {
+      workspaceId: workspace.workspaceId,
+      agentId: workspace.agentId,
+    });
+
+    const pill = page.getByTestId("composer-diff-stat-pill");
+    await expect(pill).toBeVisible({ timeout: 30_000 });
+    await expect(pill).toContainText("+2");
+    await expect(pill).toContainText("-0");
+    await pill.click();
+
+    const sidePanel = page.getByTestId("workspace-side-panel").filter({ visible: true });
+    await expect(sidePanel.getByTestId("workspace-tab-working_diff")).toBeVisible({
+      timeout: 30_000,
+    });
+    await expect(sidePanel.getByTestId("working-diff-panel")).toBeVisible({ timeout: 30_000 });
+  } finally {
+    await workspace.cleanup();
+  }
+});
+
+test("composer diff stat opens Changes in the focused pane when Side panel routing is off", async ({
+  page,
+}) => {
+  await page.addInitScript((settingsKey) => {
+    localStorage.setItem(settingsKey, JSON.stringify({ openSupportingTabsInSidePanel: false }));
+  }, APP_SETTINGS_KEY);
+  const workspace = await seedChangedAgent("composer-diff-stat-tab-");
+
+  try {
+    await page.setViewportSize({ width: 1400, height: 900 });
+    await openAgentRoute(page, {
+      workspaceId: workspace.workspaceId,
+      agentId: workspace.agentId,
+    });
+
+    await page.getByTestId("composer-diff-stat-pill").click();
+
+    const mainPane = visibleMainPane(page);
+    await expect(mainPane.getByTestId("workspace-tab-working_diff")).toBeVisible({
+      timeout: 30_000,
+    });
+    await expect(mainPane.getByTestId("working-diff-panel")).toBeVisible({ timeout: 30_000 });
+    await expect(page.getByTestId("workspace-side-panel")).toHaveCount(0);
+  } finally {
+    await workspace.cleanup();
+  }
+});

packages/app/e2e/browser/file-tree-rail-toggle.spec.ts

@@ -9,6 +9,18 @@ import { seedWorkspace, type SeededWorkspace } from "../support/helpers/seed-cli
 
 let workspace: SeededWorkspace;
 
+async function effectiveBackground(locator: import("@playwright/test").Locator): Promise<string> {
+  return locator.evaluate((element) => {
+    let current: Element | null = element;
+    while (current) {
+      const color = getComputedStyle(current).backgroundColor;
+      if (color !== "rgba(0, 0, 0, 0)" && color !== "transparent") return color;
+      current = current.parentElement;
+    }
+    return "transparent";
+  });
+}
+
 test.beforeAll(async () => {
   workspace = await seedWorkspace({
     repoPrefix: "file-tree-rail-toggle-",
@@ -21,6 +33,21 @@ test.afterAll(async () => {
 });
 
 test.describe("File panel tree rail", () => {
+  test("the Files panel starts with an empty content pane beside the tree", async ({ page }) => {
+    await gotoWorkspace(page, workspace.workspaceId);
+    await openFileExplorer(page);
+
+    const rail = page.getByTestId("files-tree-rail").filter({ visible: true });
+    await expect(rail).toBeVisible({ timeout: 30_000 });
+    const content = rail.getByTestId("files-tree-rail-content");
+    const tree = rail.getByTestId("files-tree-rail-tree");
+    await expect(content).toHaveText("Choose a file");
+    await expect(tree).toContainText("docs");
+    expect(await effectiveBackground(tree.getByTestId("file-explorer-tree-scroll"))).toBe(
+      await effectiveBackground(content),
+    );
+  });
+
   test("the file toolbar toggle closes and reopens the tree", async ({ page }, testInfo) => {
     await gotoWorkspace(page, workspace.workspaceId);
     await openFileExplorer(page);

packages/app/e2e/browser/launcher-tab.spec.ts

@@ -156,7 +156,7 @@ test.describe("Tab creation", () => {
     const shortcutPrefix = process.platform === "darwin" ? /⇧⌘/ : /Ctrl.*Shift/;
     await expect(agent).toContainText(new RegExp(`${shortcutPrefix.source}.*A`));
     await expect(terminal).toContainText(new RegExp(`${shortcutPrefix.source}.*T`));
-    await expect(changes).toContainText(new RegExp(`${shortcutPrefix.source}.*C`));
+    await expect(changes).toContainText(new RegExp(`${shortcutPrefix.source}.*G`));
     await expect(files).toContainText(new RegExp(`${shortcutPrefix.source}.*E`));
     await expect(agent).toBeFocused();
 

packages/app/e2e/browser/side-panel.spec.ts

@@ -22,6 +22,12 @@ function emptyState(scope: Locator): Locator {
   return scope.getByTestId("workspace-pane-empty-state");
 }
 
+async function launcherButtonLabels(launcher: Locator): Promise<(string | null)[]> {
+  return launcher
+    .getByRole("button")
+    .evaluateAll((buttons) => buttons.map((button) => button.getAttribute("aria-label")));
+}
+
 function sidePanelToggle(page: Page): Locator {
   return page.getByTestId("workspace-explorer-toggle").first();
 }
@@ -61,7 +67,15 @@ test.describe("Side panel", () => {
       await test.step("revealing the Side panel seeds nothing", async () => {
         await sidePanelToggle(page).click();
         await expect(sidePanel(page)).toBeVisible({ timeout: 30_000 });
-        await expect(emptyState(sidePanel(page))).toBeVisible();
+        const launcher = emptyState(sidePanel(page));
+        await expect(launcher).toBeVisible();
+        expect(await launcherButtonLabels(launcher)).toEqual([
+          "Changes",
+          "Files",
+          "Agent",
+          "Terminal",
+          null,
+        ]);
         await expect(page.getByTestId("workspace-tab-working_diff")).toHaveCount(0);
         await capture(page, testInfo, "01-side-panel-reveals-empty");
       });

packages/app/e2e/support/helpers/mock-agent.ts

@@ -14,6 +14,7 @@ export interface MockAgentWorkspace {
 export interface MockAgentOptions {
   repoPrefix: string;
   title: string;
+  repo?: Parameters<typeof seedWorkspace>[0]["repo"];
   port?: number;
   initialPrompt?: string;
   model?: string;
@@ -29,7 +30,11 @@ export interface MockAgentOptions {
 export async function seedMockAgentWorkspace(
   options: MockAgentOptions,
 ): Promise<MockAgentWorkspace> {
-  const workspace = await seedWorkspace({ repoPrefix: options.repoPrefix, port: options.port });
+  const workspace = await seedWorkspace({
+    repoPrefix: options.repoPrefix,
+    repo: options.repo,
+    port: options.port,
+  });
   try {
     const agent = await workspace.client.createAgent({
       provider: "mock",

packages/app/e2e/support/helpers/seed-client.ts

@@ -12,6 +12,7 @@ export interface SeedWorkspaceDescriptor {
   projectDisplayName: string;
   projectRootPath: string;
   workspaceDirectory: string;
+  diffStat: { additions: number; deletions: number } | null;
   labels?: string[];
 }
 

packages/app/src/components/file-explorer-pane.tsx

@@ -1662,7 +1662,6 @@ function getErrorRecoveryPath(state: AgentFileExplorerState | undefined): string
 const styles = StyleSheet.create((theme) => ({
   container: {
     flex: 1,
-    backgroundColor: theme.colors.surfaceSidebar,
   },
   desktopSplit: {
     flex: 1,

packages/app/src/composer/diff-stat-pill.test.tsx

@@ -0,0 +1,69 @@
+// @vitest-environment jsdom
+
+import { act, renderHook } from "@testing-library/react";
+import type { DaemonClient } from "@getpaseo/client/internal/daemon-client";
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { useSessionStore, type WorkspaceDescriptor } from "@/stores/session-store";
+import { seedSessionWorkspaces } from "@/test/seed-session";
+import { useWorkspaceHasDiffStat } from "./workspace-diff-stat";
+
+const SERVER_ID = "diff-stat-pill";
+const WORKSPACE_ID = "workspace";
+
+const workspace: WorkspaceDescriptor = {
+  id: WORKSPACE_ID,
+  projectId: "project",
+  projectDisplayName: "Project",
+  projectRootPath: "/repo",
+  workspaceDirectory: "/repo",
+  projectKind: "git",
+  workspaceKind: "local_checkout",
+  name: "main",
+  status: "done",
+  statusEnteredAt: null,
+  archivingAt: null,
+  diffStat: null,
+  scripts: [],
+};
+
+function setDiffStat(diffStat: WorkspaceDescriptor["diffStat"]): void {
+  useSessionStore.getState().setWorkspaces(SERVER_ID, (workspaces) => {
+    const next = new Map(workspaces);
+    next.set(WORKSPACE_ID, { ...workspace, diffStat });
+    return next;
+  });
+}
+
+describe("useWorkspaceHasDiffStat", () => {
+  beforeEach(() => {
+    useSessionStore.getState().initializeSession(SERVER_ID, null as unknown as DaemonClient);
+    seedSessionWorkspaces(SERVER_ID, new Map([[WORKSPACE_ID, workspace]]));
+  });
+
+  afterEach(() => {
+    useSessionStore.getState().clearSession(SERVER_ID);
+  });
+
+  it("does not re-render its owner when only the visible counts change", () => {
+    let renderCount = 0;
+    const { result } = renderHook(() => {
+      renderCount += 1;
+      return useWorkspaceHasDiffStat(SERVER_ID, WORKSPACE_ID);
+    });
+
+    expect(result.current).toBe(false);
+    expect(renderCount).toBe(1);
+
+    act(() => setDiffStat({ additions: 2, deletions: 0 }));
+    expect(result.current).toBe(true);
+    expect(renderCount).toBe(2);
+
+    act(() => setDiffStat({ additions: 5, deletions: 3 }));
+    expect(result.current).toBe(true);
+    expect(renderCount).toBe(2);
+
+    act(() => setDiffStat(null));
+    expect(result.current).toBe(false);
+    expect(renderCount).toBe(3);
+  });
+});

packages/app/src/composer/diff-stat-pill.tsx

@@ -0,0 +1,59 @@
+import { memo, useCallback, useMemo, useState, type ReactElement } from "react";
+import { Pressable } from "react-native";
+import { useTranslation } from "react-i18next";
+import { DiffStat } from "@/components/diff-stat";
+import { composerPillStyles } from "@/composer/pill-styles";
+import { useVisibleWorkspaceDiffStat } from "@/composer/workspace-diff-stat";
+
+interface ComposerDiffStatPillProps {
+  additions: number;
+  deletions: number;
+  onPress: () => void;
+}
+
+export function ComposerDiffStatPill({ additions, deletions, onPress }: ComposerDiffStatPillProps) {
+  const { t } = useTranslation();
+  const [isHovered, setIsHovered] = useState(false);
+  const handleHoverIn = useCallback(() => setIsHovered(true), []);
+  const handleHoverOut = useCallback(() => setIsHovered(false), []);
+  const bodyStyle = useMemo(
+    () => [composerPillStyles.body, isHovered && composerPillStyles.bodyActive],
+    [isHovered],
+  );
+
+  return (
+    <Pressable
+      testID="composer-diff-stat-pill"
+      accessibilityRole="button"
+      accessibilityLabel={t("workspace.git.diff.openChangesTab")}
+      onPress={onPress}
+      onHoverIn={handleHoverIn}
+      onHoverOut={handleHoverOut}
+      style={bodyStyle}
+    >
+      <DiffStat additions={additions} deletions={deletions} />
+    </Pressable>
+  );
+}
+
+export const WorkspaceDiffStatPill = memo(function WorkspaceDiffStatPill({
+  serverId,
+  workspaceId,
+  onPress,
+}: {
+  serverId: string;
+  workspaceId: string;
+  onPress: () => void;
+}): ReactElement | null {
+  const diffStat = useVisibleWorkspaceDiffStat(serverId, workspaceId);
+  if (!diffStat) {
+    return null;
+  }
+  return (
+    <ComposerDiffStatPill
+      additions={diffStat.additions}
+      deletions={diffStat.deletions}
+      onPress={onPress}
+    />
+  );
+});

packages/app/src/composer/workspace-diff-stat.ts

@@ -0,0 +1,24 @@
+import type { WorkspaceDescriptor } from "@/stores/session-store";
+import { useWorkspaceFields } from "@/stores/session-store-hooks";
+
+type DiffStat = NonNullable<WorkspaceDescriptor["diffStat"]>;
+
+export function useVisibleWorkspaceDiffStat(
+  serverId: string,
+  workspaceId: string,
+): DiffStat | null {
+  const diffStat = useWorkspaceFields(serverId, workspaceId, (workspace) => workspace.diffStat);
+  return hasDiffStatChanges(diffStat) ? diffStat : null;
+}
+
+export function useWorkspaceHasDiffStat(serverId: string, workspaceId: string): boolean {
+  return (
+    useWorkspaceFields(serverId, workspaceId, (workspace) =>
+      hasDiffStatChanges(workspace.diffStat),
+    ) ?? false
+  );
+}
+
+function hasDiffStatChanges(diffStat: WorkspaceDescriptor["diffStat"]): diffStat is DiffStat {
+  return Boolean(diffStat && (diffStat.additions > 0 || diffStat.deletions > 0));
+}

packages/app/src/git/diff-document/surface.web.tsx

@@ -495,7 +495,14 @@ export function DiffSurface(props: DiffSurfaceProps) {
         schedulePaint();
         return;
       }
-      if (drag && !moved && hit?.kind === "cell" && hit.target && reviewActions) {
+      if (
+        event.pointerType === "touch" &&
+        drag &&
+        !moved &&
+        hit?.kind === "cell" &&
+        hit.target &&
+        reviewActions
+      ) {
         selectionRef.current = null;
         reviewActions.onStartComment(hit.target);
         schedulePaint();

packages/app/src/i18n/resources/ar.ts

@@ -1729,6 +1729,7 @@ export const ar: TranslationResources = {
       label: "الملفات",
       subtitle: "ملفات مساحة العمل",
       tooltip: "تصفح ملفات مساحة العمل",
+      chooseFile: "اختر ملفًا",
     },
     pullRequest: {
       label: "طلب السحب",

packages/app/src/i18n/resources/en.ts

@@ -1739,6 +1739,7 @@ export const en = {
       label: "Files",
       subtitle: "Workspace files",
       tooltip: "Browse workspace files",
+      chooseFile: "Choose a file",
     },
     pullRequest: {
       label: "Pull request",

packages/app/src/i18n/resources/es.ts

@@ -1775,6 +1775,7 @@ export const es: TranslationResources = {
       label: "Archivos",
       subtitle: "Archivos del espacio de trabajo",
       tooltip: "Explorar archivos del espacio de trabajo",
+      chooseFile: "Elige un archivo",
     },
     pullRequest: {
       label: "Solicitud de extracción",

packages/app/src/i18n/resources/fr.ts

@@ -1779,6 +1779,7 @@ export const fr: TranslationResources = {
       label: "Fichiers",
       subtitle: "Fichiers de l’espace de travail",
       tooltip: "Parcourir les fichiers de l’espace de travail",
+      chooseFile: "Choisissez un fichier",
     },
     pullRequest: {
       label: "Demande de fusion",

packages/app/src/i18n/resources/ja.ts

@@ -1746,6 +1746,7 @@ export const ja: TranslationResources = {
       label: "ファイル",
       subtitle: "ワークスペースのファイル",
       tooltip: "ワークスペースのファイルを参照",
+      chooseFile: "ファイルを選択",
     },
     pullRequest: {
       label: "プルリクエスト",

packages/app/src/i18n/resources/ko.ts

@@ -1739,6 +1739,7 @@ export const ko: TranslationResources = {
       label: "파일",
       subtitle: "워크스페이스 파일",
       tooltip: "워크스페이스 파일 탐색",
+      chooseFile: "파일 선택",
     },
     pullRequest: {
       label: "풀 리퀘스트",

packages/app/src/i18n/resources/pt-BR.ts

@@ -1761,6 +1761,7 @@ export const ptBR: TranslationResources = {
       label: "Arquivos",
       subtitle: "Arquivos do espaço de trabalho",
       tooltip: "Explorar arquivos do espaço de trabalho",
+      chooseFile: "Escolha um arquivo",
     },
     pullRequest: {
       label: "Pull request",

packages/app/src/i18n/resources/ru.ts

@@ -1760,6 +1760,7 @@ export const ru: TranslationResources = {
       label: "Файлы",
       subtitle: "Файлы рабочего пространства",
       tooltip: "Просмотр файлов рабочего пространства",
+      chooseFile: "Выберите файл",
     },
     pullRequest: {
       label: "PR",

packages/app/src/i18n/resources/zh-CN.ts

@@ -1709,6 +1709,7 @@ export const zhCN: TranslationResources = {
       label: "文件",
       subtitle: "工作区文件",
       tooltip: "浏览工作区文件",
+      chooseFile: "选择文件",
     },
     pullRequest: {
       label: "拉取请求",

packages/app/src/keyboard/keyboard-shortcuts.test.ts

@@ -1158,7 +1158,7 @@ describe("direct new-tab target shortcuts", () => {
   const targetCases = [
     ["a", "KeyA", "workspace.tab.target.agent"],
     ["b", "KeyB", "workspace.tab.target.browser"],
-    ["c", "KeyC", "workspace.tab.target.changes"],
+    ["g", "KeyG", "workspace.tab.target.changes"],
     ["e", "KeyE", "workspace.tab.target.files"],
   ] as const;
 
@@ -1192,9 +1192,9 @@ describe("direct new-tab target shortcuts", () => {
 
   it("uses the existing override map for target matching and display", () => {
     const bindingId = "workspace-tab-target-agent-ctrl-shift-a-non-mac";
-    const overrides = { [bindingId]: "Ctrl+Shift+G" };
+    const overrides = { [bindingId]: "Ctrl+Shift+H" };
     const rebound = resolveShortcut({
-      event: { key: "g", code: "KeyG", ctrlKey: true, shiftKey: true },
+      event: { key: "h", code: "KeyH", ctrlKey: true, shiftKey: true },
       context: { ...desktopNonMac, focusScope: "other" },
       bindings: buildEffectiveBindings(overrides),
     });
@@ -1208,6 +1208,6 @@ describe("direct new-tab target shortcuts", () => {
     expect(original.match).toBeNull();
     expect(
       resolveShortcutKeysForAction("workspace-tab-target-agent", overrides, desktopNonMac),
-    ).toEqual([["ctrl", "shift", "G"]]);
+    ).toEqual([["ctrl", "shift", "H"]]);
   });
 });

packages/app/src/keyboard/keyboard-shortcuts.ts

@@ -454,9 +454,10 @@ const SHORTCUT_BINDINGS: readonly ShortcutBinding[] = [
     },
   },
   {
+    // Keep the binding id stable so saved overrides from the former Cmd+Shift+C default survive.
     id: "workspace-tab-target-changes-cmd-shift-c-mac",
     action: "workspace.tab.target.changes",
-    combo: "Cmd+Shift+C",
+    combo: "Cmd+Shift+G",
     when: { mac: true, commandCenter: false },
     help: {
       id: "workspace-tab-target-changes",
@@ -465,9 +466,10 @@ const SHORTCUT_BINDINGS: readonly ShortcutBinding[] = [
     },
   },
   {
+    // Keep the binding id stable so saved overrides from the former Ctrl+Shift+C default survive.
     id: "workspace-tab-target-changes-ctrl-shift-c-non-mac",
     action: "workspace.tab.target.changes",
-    combo: "Ctrl+Shift+C",
+    combo: "Ctrl+Shift+G",
     when: { mac: false, commandCenter: false, terminal: false },
     help: {
       id: "workspace-tab-target-changes",

packages/app/src/panels/agent-panel.tsx

@@ -25,6 +25,7 @@ import { ArchivedAgentCallout } from "@/components/archived-agent-callout";
 import { FileDropZone } from "@/components/file-drop/file-drop-zone";
 import { useRetainedPanelActive } from "@/components/retained-panel";
 import { Composer } from "@/composer";
+import { useWorkspaceHasDiffStat } from "@/composer/workspace-diff-stat";
 import { resolveComposerTrackTailClearance } from "@/composer/pill-styles";
 import { getActiveMessageSubmissions } from "@/composer/submission/model";
 import { RewindComposerRestoreProvider } from "@/components/rewind/composer-restore";
@@ -748,6 +749,7 @@ function AgentPanelBody({
   return (
     <ChatAgentContent
       serverId={serverId}
+      workspaceId={workspaceId}
       agentId={agentId}
       isPaneFocused={isPaneFocused}
       client={client}
@@ -760,6 +762,7 @@ function AgentPanelBody({
 
 function ChatAgentContent({
   serverId,
+  workspaceId,
   agentId,
   isPaneFocused,
   client,
@@ -768,6 +771,7 @@ function ChatAgentContent({
   onOpenWorkspaceFile,
 }: {
   serverId: string;
+  workspaceId: string;
   agentId?: string;
   isPaneFocused: boolean;
   client: ReturnType<typeof useHostRuntimeClient>;
@@ -1164,6 +1168,7 @@ function ChatAgentContent({
   return (
     <ChatAgentReadyContent
       serverId={serverId}
+      workspaceId={workspaceId}
       agentId={agentId}
       isPaneFocused={isPaneFocused}
       isArchivingCurrentAgent={isArchivingCurrentAgent}
@@ -1192,6 +1197,7 @@ function ChatAgentContent({
 
 const ChatAgentReadyContent = memo(function ChatAgentReadyContent({
   serverId,
+  workspaceId,
   agentId,
   isPaneFocused,
   isArchivingCurrentAgent,
@@ -1216,6 +1222,7 @@ const ChatAgentReadyContent = memo(function ChatAgentReadyContent({
   onOpenWorkspaceFile,
 }: {
   serverId: string;
+  workspaceId: string;
   agentId: string;
   isPaneFocused: boolean;
   isArchivingCurrentAgent: boolean;
@@ -1240,8 +1247,6 @@ const ChatAgentReadyContent = memo(function ChatAgentReadyContent({
   onOpenWorkspaceFile?: (request: WorkspaceFileOpenRequest) => void;
 }) {
   const { t } = useTranslation();
-  const isCompactFormFactor = useIsCompactFormFactor();
-  const composerTrackTailClearance = resolveComposerTrackTailClearance(isCompactFormFactor);
   const subagentRows = useSubagentsForParent({ serverId, parentAgentId: agentId });
   const tasks = useSessionStore((state): TodoEntry[] | undefined =>
     state.sessions[serverId]?.agentTasks.get(agentId),
@@ -1252,9 +1257,7 @@ const ChatAgentReadyContent = memo(function ChatAgentReadyContent({
     rows: subagentRows,
   });
   const hasActiveComposer = !agentState.archivedAt && !isArchivingCurrentAgent;
-  const showAgentTracks =
+  const hasVisibleAgentTracks = hasAgentTracks({
-    hasActiveComposer &&
-    hasAgentTracks({
     subagentRows,
     tasks,
     archiveFinishedStatus: archiveFinishedSubagents.status,
@@ -1329,18 +1332,21 @@ const ChatAgentReadyContent = memo(function ChatAgentReadyContent({
         <AgentStreamSection
           streamViewRef={streamViewRef}
           serverId={serverId}
+          workspaceId={workspaceId}
           agentId={agentId}
           agent={effectiveAgent}
           routeBottomAnchorRequest={routeBottomAnchorRequest}
           hasAppliedAuthoritativeHistory={hasAppliedAuthoritativeHistory}
-          bottomOverlayTailClearance={showAgentTracks ? composerTrackTailClearance : 0}
+          hasActiveComposer={hasActiveComposer}
+          hasVisibleAgentTracks={hasVisibleAgentTracks}
           toast={toastApi}
           onOpenWorkspaceFile={onOpenWorkspaceFile}
         />
       </RenderProfile>
-      {showAgentTracks ? (
+      {hasActiveComposer ? (
         <AgentTracks
           serverId={serverId}
+          workspaceId={workspaceId}
           subagentRows={subagentRows}
           tasks={tasks}
           archiveFinishedStatus={archiveFinishedSubagents.status}
@@ -1409,24 +1415,35 @@ const ChatAgentReadyContent = memo(function ChatAgentReadyContent({
 const AgentStreamSection = memo(function AgentStreamSection({
   streamViewRef,
   serverId,
+  workspaceId,
   agentId,
   agent,
   routeBottomAnchorRequest,
   hasAppliedAuthoritativeHistory,
-  bottomOverlayTailClearance,
+  hasActiveComposer,
+  hasVisibleAgentTracks,
   toast,
   onOpenWorkspaceFile,
 }: {
   streamViewRef: React.RefObject<AgentStreamViewHandle | null>;
   serverId: string;
+  workspaceId: string;
   agentId?: string;
   agent: AgentScreenAgent;
   routeBottomAnchorRequest: RouteBottomAnchorRequest;
   hasAppliedAuthoritativeHistory: boolean;
-  bottomOverlayTailClearance: number;
+  hasActiveComposer: boolean;
+  hasVisibleAgentTracks: boolean;
   toast: ReturnType<typeof useToastHost>["api"];
   onOpenWorkspaceFile?: (request: WorkspaceFileOpenRequest) => void;
 }) {
+  const isCompactFormFactor = useIsCompactFormFactor();
+  const hasWorkspaceDiffStat = useWorkspaceHasDiffStat(serverId, workspaceId);
+  const hasVisibleComposerTracks =
+    hasActiveComposer && (hasVisibleAgentTracks || hasWorkspaceDiffStat);
+  const bottomOverlayTailClearance = hasVisibleComposerTracks
+    ? resolveComposerTrackTailClearance(isCompactFormFactor)
+    : 0;
   const streamItemsRaw = useSessionStore((state) =>
     agentId ? state.sessions[serverId]?.agentStreamTail?.get(agentId) : undefined,
   );

packages/app/src/panels/agent-tracks.tsx

@@ -1,4 +1,6 @@
 import { memo, useCallback, type ReactElement } from "react";
+import { WorkspaceDiffStatPill } from "@/composer/diff-stat-pill";
+import { useWorkspaceHasDiffStat } from "@/composer/workspace-diff-stat";
 import { AgentTaskList } from "@/composer/task-list";
 import { ComposerTrackBar } from "@/composer/tracks";
 import { supportsDesktopPaneSplits, useIsCompactFormFactor } from "@/constants/layout";
@@ -18,26 +20,29 @@ import { buildWorkspaceTabPersistenceKey } from "@/workspace-tabs/model";
 import { openSupportingTab } from "@/workspace-tabs/side-panel";
 
 /**
- * The pane's trackers — its subagents and its task list — as a row of pills above the composer.
+ * The pane's ambient context — workspace changes, subagents, and tasks — as a row of pills above
+ * the composer.
  *
  * The row shares the composer's keyboard transform and owns the space between itself and the
- * transcript. Its data remains agent state: a subagent row opens a tab and the task list reads
+ * transcript. Each pill owns its action while tab placement stays behind the workspace boundary.
- * the agent's stream.
  */
 export const AgentTracks = memo(function AgentTracks({
   serverId,
+  workspaceId,
   subagentRows,
   tasks,
   archiveFinishedStatus,
   onArchiveFinished,
 }: {
   serverId: string;
+  workspaceId: string;
   subagentRows: SubagentRow[];
   tasks: TodoEntry[] | undefined;
   archiveFinishedStatus: ArchiveFinishedStatus;
   onArchiveFinished: () => void;
 }): ReactElement | null {
-  const { workspaceId, tabId, openTab } = usePaneContext();
+  const { tabId, openTab } = usePaneContext();
+  const hasWorkspaceDiffStat = useWorkspaceHasDiffStat(serverId, workspaceId);
   const isCompact = useIsCompactFormFactor();
   const canSplit = supportsDesktopPaneSplits() && !isCompact;
   const openInSidePanelByDefault = useSettings(
@@ -87,13 +92,25 @@ export const AgentTracks = memo(function AgentTracks({
     },
     [canSplit, isCompact, openInSidePanelByDefault, openTab, tabId, workspaceKey],
   );
+  const handleOpenChanges = useCallback(() => {
+    if (!workspaceKey) {
+      return;
+    }
+    openSupportingTab({
+      isCompact,
+      workspaceKey,
+      target: { kind: "working_diff" },
+      openInSidePanelByDefault,
+    });
+  }, [isCompact, openInSidePanelByDefault, workspaceKey]);
 
-  if (!hasAgentTracks({ subagentRows, tasks, archiveFinishedStatus })) {
+  if (!hasWorkspaceDiffStat && !hasAgentTracks({ subagentRows, tasks, archiveFinishedStatus })) {
     return null;
   }
 
   return (
     <ComposerTrackBar>
+      <AgentTaskList tasks={tasks} />
       <SubagentsTrack
         rows={subagentRows}
         onOpenSubagent={handleOpenSubagent}
@@ -103,7 +120,11 @@ export const AgentTracks = memo(function AgentTracks({
         archiveFinishedStatus={archiveFinishedStatus}
         onDetachSubagent={canDetachSubagents ? detachSubagent : undefined}
       />
-      <AgentTaskList tasks={tasks} />
+      <WorkspaceDiffStatPill
+        serverId={serverId}
+        workspaceId={workspaceId}
+        onPress={handleOpenChanges}
+      />
     </ComposerTrackBar>
   );
 });

packages/app/src/panels/files-panel.tsx

@@ -1,6 +1,6 @@
 import { Text, View } from "react-native";
 import { FolderTree } from "lucide-react-native";
-import { withUnistyles } from "react-native-unistyles";
+import { StyleSheet, withUnistyles } from "react-native-unistyles";
 import { useCallback } from "react";
 import { useTranslation } from "react-i18next";
 import invariant from "tiny-invariant";
@@ -9,14 +9,11 @@ import { usePaneContext } from "@/panels/pane-context";
 import type { PanelRegistration } from "@/panels/panel-registry";
 import { useAddFileToChat } from "@/panels/use-add-file-to-chat";
 import { useWorkspaceDirectory } from "@/stores/session-store-hooks";
+import { TreeRail } from "@/components/tree-rail";
+import { useIsCompactFormFactor } from "@/constants/layout";
 
 const ThemedFolderTree = withUnistyles(FolderTree);
-const CENTERED_PADDED_STYLE = {
+const FILE_TREE_WIDTH = 220;
-  flex: 1,
-  alignItems: "center",
-  justifyContent: "center",
-  padding: 16,
-} as const;
 
 function useFilesPanelDescriptor() {
   const { t } = useTranslation();
@@ -35,6 +32,7 @@ function FilesPanel() {
   const { serverId, workspaceId, target, retargetCurrentTab } = usePaneContext();
   const workspaceRoot = useWorkspaceDirectory(serverId, workspaceId);
   const { addFile, canAddToChat } = useAddFileToChat({ serverId, workspaceId });
+  const isCompact = useIsCompactFormFactor();
   invariant(target.kind === "files", "FilesPanel requires files target");
   const onOpenFile = useCallback(
     (path: string) => retargetCurrentTab({ kind: "file", path }),
@@ -42,11 +40,12 @@ function FilesPanel() {
   );
   if (!workspaceRoot) {
     return (
-      <View style={CENTERED_PADDED_STYLE}>
+      <View style={styles.centerState}>
         <Text>{t("panels.file.directoryMissing")}</Text>
       </View>
     );
   }
+  if (isCompact) {
     return (
       <FileExplorerPane
         serverId={serverId}
@@ -57,6 +56,21 @@ function FilesPanel() {
       />
     );
   }
+  return (
+    <TreeRail testID="files-tree-rail" width={FILE_TREE_WIDTH}>
+      <View style={styles.centerState}>
+        <Text style={styles.emptyText}>{t("panels.files.chooseFile")}</Text>
+      </View>
+      <FileExplorerPane
+        serverId={serverId}
+        workspaceId={workspaceId}
+        workspaceRoot={workspaceRoot}
+        onOpenFile={onOpenFile}
+        onAddToChat={canAddToChat ? addFile : undefined}
+      />
+    </TreeRail>
+  );
+}
 
 export const filesPanelRegistration: PanelRegistration<"files"> = {
   kind: "files",
@@ -64,3 +78,16 @@ export const filesPanelRegistration: PanelRegistration<"files"> = {
   component: FilesPanel,
   useDescriptor: useFilesPanelDescriptor,
 };
+
+const styles = StyleSheet.create((theme) => ({
+  centerState: {
+    flex: 1,
+    alignItems: "center",
+    justifyContent: "center",
+    padding: theme.spacing[4],
+  },
+  emptyText: {
+    color: theme.colors.foregroundMuted,
+    fontSize: theme.fontSize.base,
+  },
+}));

packages/app/src/review/surface.tsx

@@ -20,7 +20,6 @@ import {
 import { isWeb } from "@/constants/platform";
 import { inlineUnistylesStyle } from "@/styles/unistyles-inline-style";
 import type { Theme } from "@/styles/theme";
-import { useWorkspaceFocusRestoration } from "@/workspace/focus";
 import { useReviewDraftComments, useReviewDraftStore, type ReviewDraftComment } from "./store";
 import { buildReviewableDiffTargetKey, type ReviewableDiffTarget } from "@/utils/diff-layout";
 import {
@@ -441,7 +440,6 @@ export function InlineReviewEditor({
 }) {
   const { t } = useTranslation();
   const inputRef = useRef<EditingTextInputHandle | null>(null);
-  const focus = useWorkspaceFocusRestoration();
   const [body, setBody] = useState(initialBody);
   const [isFocused, setIsFocused] = useState(false);
   const trimmedBody = body.trim();
@@ -452,13 +450,11 @@ export function InlineReviewEditor({
   }, []);
 
   const handleFocus = useCallback(() => {
-    focus.unfocus();
     setIsFocused(true);
-  }, [focus]);
+  }, []);
   const handleBlur = useCallback(() => {
     setIsFocused(false);
-    focus.restore();
+  }, []);
-  }, [focus]);
   const handleSave = useCallback(() => onSave(trimmedBody), [onSave, trimmedBody]);
 
   useEffect(() => {

packages/app/src/screens/workspace/workspace-desktop-tabs-row.tsx

@@ -106,8 +106,10 @@ import { useWorkspaceDirectory } from "@/stores/session-store-hooks";
 import { useCheckoutStatusQuery } from "@/git/use-status-query";
 import { TrailingActionScrim } from "@/components/ui/trailing-action-scrim";
 import { useKeyboardActionHandler } from "@/hooks/use-keyboard-action-handler";
+import { useSettings } from "@/hooks/use-settings";
 import { buildWorkspaceKeyboardHandlerId } from "@/keyboard/handler-id";
 import type { KeyboardActionDefinition } from "@/keyboard/keyboard-action-dispatcher";
+import { openSupportingTab } from "@/workspace-tabs/side-panel";
 
 const DROPDOWN_WIDTH = 220;
 const DEFAULT_INLINE_ADD_BUTTON_RESERVED_WIDTH = 36;
@@ -1169,6 +1171,10 @@ function ResolvedWorkspaceDesktopTabsRow({
 }: ResolvedWorkspaceDesktopTabsRowProps) {
   const { t } = useTranslation();
   const router = useRouter();
+  const isCompact = useIsCompactFormFactor();
+  const openInSidePanelByDefault = useSettings(
+    (settings) => settings.openSupportingTabsInSidePanel,
+  );
   const newTabKeys = useShortcutKeys("workspace-tab-new");
   const [tabsContainerWidth, setTabsContainerWidth] = useState<number>(0);
   const [inlineAddButtonWidth, setInlineAddButtonWidth] = useState<number>(0);
@@ -1450,6 +1456,14 @@ function ResolvedWorkspaceDesktopTabsRow({
     [openNewTab, paneId, workspaceKey],
   );
   const handleOpenChanges = useCallback(() => openPanelTarget(CHANGES_TARGET), [openPanelTarget]);
+  const handleOpenChangesShortcut = useCallback(() => {
+    openSupportingTab({
+      isCompact,
+      workspaceKey,
+      target: CHANGES_TARGET,
+      openInSidePanelByDefault,
+    });
+  }, [isCompact, openInSidePanelByDefault, workspaceKey]);
   const handleOpenFiles = useCallback(() => openPanelTarget(FILES_TARGET), [openPanelTarget]);
   const handleOpenPullRequest = useCallback(
     () => openPanelTarget(PULL_REQUEST_TARGET),
@@ -1484,7 +1498,7 @@ function ResolvedWorkspaceDesktopTabsRow({
         case "workspace.tab.target.changes":
           if (!isGit) return true;
           setNewTabMenuOpen(false);
-          handleOpenChanges();
+          handleOpenChangesShortcut();
           return true;
         case "workspace.tab.target.files":
           setNewTabMenuOpen(false);
@@ -1497,7 +1511,7 @@ function ResolvedWorkspaceDesktopTabsRow({
     [
       handleCreateAgentTab,
       handleCreateBrowser,
-      handleOpenChanges,
+      handleOpenChangesShortcut,
       handleOpenFiles,
       isFocused,
       isGit,

packages/app/src/screens/workspace/workspace-pane-empty-state.tsx

@@ -122,13 +122,6 @@ export const WorkspacePaneEmptyState = memo(function WorkspacePaneEmptyState({
     <View style={styles.container} testID="workspace-pane-empty-state">
       <View style={styles.rail}>
         <View style={styles.stack}>
-          <LauncherRow
-            label={t("workspace.tabs.actions.files")}
-            icon={FILES_ICON}
-            onPress={openFiles}
-          >
-            <LauncherShortcut actionId="workspace-tab-target-files" />
-          </LauncherRow>
           {showChanges ? (
             <LauncherRow
               label={t("workspace.tabs.actions.changes")}
@@ -138,6 +131,13 @@ export const WorkspacePaneEmptyState = memo(function WorkspacePaneEmptyState({
               <LauncherShortcut actionId="workspace-tab-target-changes" />
             </LauncherRow>
           ) : null}
+          <LauncherRow
+            label={t("workspace.tabs.actions.files")}
+            icon={FILES_ICON}
+            onPress={openFiles}
+          >
+            <LauncherShortcut actionId="workspace-tab-target-files" />
+          </LauncherRow>
           {showPullRequest ? (
             <LauncherRow
               label={t("workspace.tabs.actions.pullRequest")}
@@ -146,14 +146,14 @@ export const WorkspacePaneEmptyState = memo(function WorkspacePaneEmptyState({
             />
           ) : null}
           <LauncherRow
-            label={t("workspace.tabs.actions.newAgent")}
+            label={t("workspace.tabs.fallback.agent")}
             icon={AGENT_ICON}
             onPress={createAgent}
           >
             <LauncherShortcut actionId="workspace-tab-target-agent" />
           </LauncherRow>
           <LauncherRow
-            label={t("workspace.tabs.actions.newTerminal")}
+            label={t("workspace.tabs.fallback.terminal")}
             icon={TERMINAL_ICON}
             onPress={createTerminal}
           >