feat: Add indexing status badge to chat view

Implements an indexing status badge in the chat view that displays the current status of codebase indexing.

The badge provides you with real-time feedback on indexing progress and errors without needing to navigate to the settings page.

Key changes:
- Created `IndexingStatusBadge.tsx`: A new component to display the badge.
    - Shows "Indexing X%" with a yellow pulsing dot for active indexing.
    - Shows "Indexing Error" with a red dot for errors.
    - Hidden for "Standby" or successful "Indexed" states.
    - Clicking the badge navigates you to the Codebase Indexing settings.
- Integrated `IndexingStatusBadge` into `ChatView.tsx`:
    - `ChatView` now listens for `indexingStatusUpdate` messages from the extension.
    - The badge is rendered in the bottom-right corner of the chat view.
- Added i18n translations for new badge text.
- Added unit tests for `IndexingStatusBadge` and integration tests in `ChatView.test.tsx` to ensure correct behavior and visibility based on indexing status.

Author: google-labs-jules[bot]

webview-ui/public/locales/en/translation.json

@@ -0,0 +1,6 @@
+{
+  "indexingBadge": {
+    "indexingInProgress": "Indexing {{progress}}%",
+    "indexingError": "Indexing Error"
+  }
+}

webview-ui/src/components/chat/ChatView.tsx

@@ -1,4 +1,5 @@
 import { forwardRef, useCallback, useEffect, useImperativeHandle, useMemo, useRef, useState } from "react"
+// import useEffect and useState from react if not already imported - already imported
 import { useDeepCompareEffect, useEvent, useMount } from "react-use"
 import debounce from "debounce"
 import { Virtuoso, type VirtuosoHandle } from "react-virtuoso"
@@ -41,6 +42,7 @@ import AutoApproveMenu from "./AutoApproveMenu"
 import SystemPromptWarning from "./SystemPromptWarning"
 import ProfileViolationWarning from "./ProfileViolationWarning"
 import { CheckpointWarning } from "./CheckpointWarning"
+import IndexingStatusBadge from "./IndexingStatusBadge"; // Added import
 
 export interface ChatViewProps {
 	isHidden: boolean
@@ -154,11 +156,42 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 		}),
 	)
 
+	const [indexingStatus, setIndexingStatus] = useState({
+		status: "Standby", // or "Idle" / "Initial"
+		message: "",
+		progress: 0,
+		isVisible: false,
+	});
+
 	const clineAskRef = useRef(clineAsk)
 	useEffect(() => {
 		clineAskRef.current = clineAsk
 	}, [clineAsk])
 
+	useEffect(() => {
+		vscode.postMessage({ type: "requestIndexingStatus" });
+
+		const handleMessage = (event: MessageEvent) => {
+			if (event.data.type === "indexingStatusUpdate") {
+				const { systemStatus, message, processedItems, totalItems } = event.data.values;
+				const progress = totalItems > 0 ? Math.round((processedItems / totalItems) * 100) : 0;
+				const isVisible = systemStatus === "Indexing" || systemStatus === "Error";
+
+				setIndexingStatus({
+					status: systemStatus,
+					message: message || "",
+					progress: progress,
+					isVisible: isVisible,
+				});
+			}
+		};
+
+		window.addEventListener("message", handleMessage);
+		return () => {
+			window.removeEventListener("message", handleMessage);
+		};
+	}, []);
+
 	useEffect(() => {
 		isMountedRef.current = true
 		return () => {
@@ -1555,6 +1588,12 @@ const ChatViewComponent: React.ForwardRefRenderFunction<ChatViewRef, ChatViewPro
 			)}
 
 			<div id="roo-portal" />
+			<IndexingStatusBadge
+				status={indexingStatus.status}
+				message={indexingStatus.message}
+				progress={indexingStatus.progress}
+				isVisible={indexingStatus.isVisible}
+			/>
 		</div>
 	)
 }

webview-ui/src/components/chat/IndexingStatusBadge.tsx

@@ -0,0 +1,74 @@
+import React from "react";
+import { Trans } from "react-i18next";
+import { vscode } from "@src/utils/vscode";
+
+interface IndexingStatusBadgeProps {
+  status: string;
+  message?: string;
+  progress: number; // 0-100
+  isVisible: boolean;
+}
+
+const IndexingStatusBadge: React.FC<IndexingStatusBadgeProps> = ({
+  status,
+  message,
+  progress,
+  isVisible,
+}) => {
+  if (!isVisible) {
+    return null;
+  }
+
+  const handleClick = () => {
+    vscode.postMessage({
+      type: "navigateTo",
+      view: "settings",
+      section: "codeIndex",
+    });
+  };
+
+  let badgeContent = null;
+  let badgeColor = "";
+  let pulseAnimation = false;
+
+  if (status === "Indexing") {
+    badgeContent = (
+      <>
+        <div className="w-3 h-3 rounded-full bg-yellow-500 animate-pulse mr-2"></div>
+        <Trans i18nKey="indexingBadge.indexingInProgress">
+          Indexing {{ progress }}%
+        </Trans>
+      </>
+    );
+    badgeColor = "bg-yellow-500";
+    pulseAnimation = true;
+  } else if (status === "Error") {
+    badgeContent = (
+      <>
+        <div className="w-3 h-3 rounded-full bg-red-500 mr-2"></div>
+        <Trans i18nKey="indexingBadge.indexingError">Indexing Error</Trans>
+        {message && <span className="ml-1">- {message}</span>}
+      </>
+    );
+    badgeColor = "bg-red-500";
+  } else {
+    // Should not be visible for "Standby" or "Indexed"
+    return null;
+  }
+
+  return (
+    <div
+      className={`fixed bottom-4 right-4 p-2 rounded-md text-white text-xs font-medium cursor-pointer shadow-lg transition-opacity duration-300 ${
+        isVisible ? "opacity-100" : "opacity-0"
+      } ${badgeColor} ${pulseAnimation ? "animate-pulse" : ""}`}
+      onClick={handleClick}
+      title={message || status}
+    >
+      <div className="flex items-center">
+        {badgeContent}
+      </div>
+    </div>
+  );
+};
+
+export default IndexingStatusBadge;

webview-ui/src/components/chat/__tests__/ChatView.test.tsx

@@ -1,7 +1,7 @@
 // npx jest src/components/chat/__tests__/ChatView.test.tsx
 
 import React from "react"
-import { render, waitFor, act } from "@testing-library/react"
+import { render, waitFor, act, screen } from "@testing-library/react"
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query"
 
 import { ExtensionStateContextProvider } from "@src/context/ExtensionStateContext"
@@ -30,11 +30,27 @@ interface ExtensionState {
 }
 
 // Mock vscode API
+const mockVscodePostMessage = jest.fn()
 jest.mock("@src/utils/vscode", () => ({
 	vscode: {
-		postMessage: jest.fn(),
+		postMessage: mockVscodePostMessage,
 	},
 }))
+// Mock i18n for IndexingStatusBadge
+jest.mock('react-i18next', () => ({
+  ...jest.requireActual('react-i18next'),
+  Trans: ({ i18nKey, children }: { i18nKey: string, children: React.ReactNode[] | React.ReactNode }) => {
+    if (i18nKey === "indexingBadge.indexingInProgress") {
+      // Simulate interpolation for {{progress}}
+      const progress = React.Children.toArray(children).find(child => typeof child === 'object' && child && 'progress' in child) as any;
+      return <>Indexing {progress?.props?.progress}%</>;
+    }
+    if (i18nKey === "indexingBadge.indexingError") {
+      return <>Indexing Error</>;
+    }
+    return <>{children}</>;
+  },
+}));
 
 // Mock use-sound hook
 const mockPlayFunction = jest.fn()
@@ -1072,3 +1088,140 @@ describe("ChatView - Focus Grabbing Tests", () => {
 		expect(mockFocus).toHaveBeenCalledTimes(FOCUS_CALLS_ON_INIT)
 	})
 })
+
+describe("ChatView - IndexingStatusBadge Integration", () => {
+	let mockAddEventListener = jest.fn();
+	let mockRemoveEventListener = jest.fn();
+
+	beforeEach(() => {
+		jest.clearAllMocks()
+		mockVscodePostMessage.mockClear(); // Use the specific mock for vscode
+
+		// Store original event listener methods
+		const originalAddEventListener = window.addEventListener;
+		const originalRemoveEventListener = window.removeEventListener;
+
+		// Mock event listener methods
+		mockAddEventListener = jest.fn();
+		mockRemoveEventListener = jest.fn();
+		window.addEventListener = mockAddEventListener;
+		window.removeEventListener = mockRemoveEventListener;
+
+		// Restore original event listener methods after each test
+		return () => {
+			window.addEventListener = originalAddEventListener;
+			window.removeEventListener = originalRemoveEventListener;
+		};
+	});
+
+	it("calls requestIndexingStatus on mount", () => {
+		renderChatView();
+		expect(mockVscodePostMessage).toHaveBeenCalledWith({ type: "requestIndexingStatus" });
+	});
+
+	it("shows IndexingStatusBadge when status is Indexing", async () => {
+		renderChatView();
+
+		// Simulate receiving indexingStatusUpdate message
+		act(() => {
+			const eventCallback = mockAddEventListener.mock.calls.find(call => call[0] === 'message')[1];
+			eventCallback({
+				data: {
+					type: "indexingStatusUpdate",
+					values: {
+						systemStatus: "Indexing",
+						message: "Processing files...",
+						processedItems: 10,
+						totalItems: 100,
+					},
+				},
+			});
+		});
+
+		await waitFor(() => {
+			expect(screen.getByText("Indexing 10%")).toBeInTheDocument();
+			const dot = screen.getByText('Indexing 10%').previousSibling as HTMLElement;
+		expect(dot).toHaveClass('bg-yellow-500');
+		});
+	});
+
+	it("shows IndexingStatusBadge with error message when status is Error", async () => {
+		renderChatView();
+
+		act(() => {
+			const eventCallback = mockAddEventListener.mock.calls.find(call => call[0] === 'message')[1];
+			eventCallback({
+				data: {
+					type: "indexingStatusUpdate",
+					values: {
+						systemStatus: "Error",
+						message: "Failed to index",
+						processedItems: 0,
+						totalItems: 0,
+					},
+				},
+			});
+		});
+
+		await waitFor(() => {
+			expect(screen.getByText("Indexing Error")).toBeInTheDocument();
+			expect(screen.getByText("- Failed to index")).toBeInTheDocument();
+			const dot = screen.getByText('Indexing Error').previousSibling as HTMLElement;
+		expect(dot).toHaveClass('bg-red-500');
+		});
+	});
+
+	it("does not show IndexingStatusBadge for Standby status", async () => {
+		const { container } = renderChatView();
+		act(() => {
+			const eventCallback = mockAddEventListener.mock.calls.find(call => call[0] === 'message')[1];
+			eventCallback({
+				data: {
+					type: "indexingStatusUpdate",
+					values: {
+						systemStatus: "Standby",
+						message: "",
+						processedItems: 0,
+						totalItems: 0,
+					},
+				},
+			});
+		});
+
+		await waitFor(() => {
+			// The badge itself returns null, so we check its absence.
+			// We look for a known child of the badge if it were visible.
+			expect(screen.queryByText(/Indexing/)).toBeNull();
+			expect(screen.queryByText(/Error/)).toBeNull();
+		});
+	});
+
+	it("does not show IndexingStatusBadge for Indexed status", async () => {
+		renderChatView();
+		act(() => {
+			const eventCallback = mockAddEventListener.mock.calls.find(call => call[0] === 'message')[1];
+			eventCallback({
+				data: {
+					type: "indexingStatusUpdate",
+					values: {
+						systemStatus: "Indexed",
+						message: "",
+						processedItems: 100,
+						totalItems: 100,
+					},
+				},
+			});
+		});
+
+		await waitFor(() => {
+			expect(screen.queryByText(/Indexing/)).toBeNull();
+			expect(screen.queryByText(/Error/)).toBeNull();
+		});
+	});
+
+	it("cleans up event listener on unmount", () => {
+		const { unmount } = renderChatView();
+		unmount();
+		expect(mockRemoveEventListener).toHaveBeenCalledWith("message", expect.any(Function));
+	});
+});