diff --git a/frontend/src/components/chat/RunStatusBar.module.css b/frontend/src/components/chat/RunStatusBar.module.css
index e5c50a6..d406f88 100644
--- a/frontend/src/components/chat/RunStatusBar.module.css
+++ b/frontend/src/components/chat/RunStatusBar.module.css
@@ -45,3 +45,8 @@
 .retryMeta {
   color: var(--text-tertiary, #9ca3af);
 }
+
+.elapsed {
+  color: var(--text-tertiary, #9ca3af);
+  font-variant-numeric: tabular-nums;
+}
diff --git a/frontend/src/components/chat/RunStatusBar.tsx b/frontend/src/components/chat/RunStatusBar.tsx
index 49f5096..67acfd6 100644
--- a/frontend/src/components/chat/RunStatusBar.tsx
+++ b/frontend/src/components/chat/RunStatusBar.tsx
@@ -1,40 +1,74 @@
+import { useEffect, useState } from "react";
 import type { RetryState } from "../../types/events";
+import type { RunPhaseState } from "../../types/runPhase";
+import { formatRunPhaseLabel } from "../../utils/runPhase";
 import styles from "./RunStatusBar.module.css";
 
 interface RunStatusBarProps {
 	isStreaming: boolean;
 	isCompacting: boolean;
+	runPhase: RunPhaseState | null;
 	retryState: RetryState | null;
 	onAbort: () => void;
 	onAbortRetry: () => void;
 }
 
+function useElapsedSeconds(startedAt: number | undefined, active: boolean): number {
+	const [elapsed, setElapsed] = useState(0);
+
+	useEffect(() => {
+		if (!active || startedAt == null) {
+			setElapsed(0);
+			return;
+		}
+
+		const tick = () => setElapsed(Math.max(0, Math.floor((Date.now() - startedAt) / 1000)));
+		tick();
+		const id = window.setInterval(tick, 1000);
+		return () => window.clearInterval(id);
+	}, [active, startedAt]);
+
+	return elapsed;
+}
+
 export function RunStatusBar({
 	isStreaming,
 	isCompacting,
+	runPhase,
 	retryState,
 	onAbort,
 	onAbortRetry,
 }: RunStatusBarProps) {
-	const retryActive = retryState?.active;
-	if (!isStreaming && !isCompacting && !retryActive) return null;
+	const retryActive = Boolean(retryState?.active);
+	const visible = isStreaming || isCompacting || retryActive;
 
 	let label = "";
+	let startedAt: number | undefined;
+
 	if (retryActive) {
 		const attempt = retryState?.attempt ?? 1;
 		const max = retryState?.maxAttempts ?? attempt;
 		label = `自动重试中 (${attempt}/${max})`;
+		startedAt = retryState?.startedAt;
 	} else if (isCompacting) {
 		label = "整理上下文中…";
-	} else {
+	} else if (runPhase) {
+		label = formatRunPhaseLabel(runPhase.phase, runPhase.detail);
+		startedAt = runPhase.startedAt;
+	} else if (isStreaming) {
 		label = "生成中…";
 	}
 
+	const elapsed = useElapsedSeconds(startedAt, visible);
+
+	if (!visible) return null;
+
 	return (
 		<div className={styles.bar}>
 			<div className={styles.statusText}>
 				<span className={styles.dot} aria-hidden="true" />
 				<span>{label}</span>
+				{elapsed > 0 ? <span className={styles.elapsed}>{elapsed}s</span> : null}
 				{retryActive && retryState?.errorMessage ? (
 					<span className={styles.retryMeta}>{retryState.errorMessage.slice(0, 80)}</span>
 				) : null}
diff --git a/frontend/src/context/ChatContext.tsx b/frontend/src/context/ChatContext.tsx
index b83879f..16b1ad0 100644
--- a/frontend/src/context/ChatContext.tsx
+++ b/frontend/src/context/ChatContext.tsx
@@ -14,6 +14,7 @@ import * as sessionsApi from "../api/sessions";
 import { apiUrl } from "../api/base";
 import { useBootstrap } from "./BootstrapContext";
 import type { ExtensionDialogState, RetryState, SseEvent } from "../types/events";
+import type { RunPhase, RunPhaseState } from "../types/runPhase";
 import type { ChatMessage, ImageContent, ModelInfo, SessionState, ThinkingLevel, ToolCallBlock } from "../types/message";
 import type { SessionHistoryPayload, SessionSummary } from "../types/session";
 import { nextMessageId, syncViewportHeight, stripAnsi } from "../utils/format";
@@ -54,6 +55,7 @@ interface ChatContextValue {
 	pendingFollowUp: string[];
 	retryState: RetryState | null;
 	isCompacting: boolean;
+	runPhase: RunPhaseState | null;
 	extensionWidgets: Record<string, string[]>;
 	extensionStatuses: Record<string, string>;
 	extensionDialog: ExtensionDialogState | null;
@@ -511,6 +513,7 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 	const [pendingFollowUp, setPendingFollowUp] = useState<string[]>([]);
 	const [retryState, setRetryState] = useState<RetryState | null>(null);
 	const [isCompacting, setIsCompacting] = useState(false);
+	const [runPhase, setRunPhase] = useState<RunPhaseState | null>(null);
 	const [extensionWidgets, setExtensionWidgets] = useState<Record<string, string[]>>({});
 	const [extensionStatuses, setExtensionStatuses] = useState<Record<string, string>>({});
 	const [extensionDialog, setExtensionDialog] = useState<ExtensionDialogState | null>(null);
@@ -564,11 +567,23 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 		[sessionState?.model],
 	);
 
+	const clearRunPhase = useCallback(() => {
+		setRunPhase(null);
+	}, []);
+
+	const updateRunPhase = useCallback((phase: RunPhase, detail?: string) => {
+		setRunPhase((prev) => {
+			if (prev?.phase === phase && prev?.detail === detail) return prev;
+			return { phase, detail, startedAt: Date.now() };
+		});
+	}, []);
+
 	const resetStreamingState = useCallback(() => {
 		streamingAssistantId.current = null;
 		streamingThinkingId.current = null;
 		optimisticUserIdRef.current = null;
-	}, []);
+		clearRunPhase();
+	}, [clearRunPhase]);
 
 	const invalidateTurnEvents = useCallback(() => {
 		resetStreamingState();
@@ -1521,6 +1536,7 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 					setConnected(true);
 					streamingAssistantId.current = null;
 					streamingThinkingId.current = null;
+					updateRunPhase("starting");
 					scheduleSessionDashboardRefresh();
 					break;
 
@@ -1577,6 +1593,11 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 					if (m.role === "assistant") {
 						const thinking = extractThinking(m.content);
 						const assistantText = extractContent(m.content);
+						if (thinking.length > 0) {
+							updateRunPhase("thinking");
+						} else if (assistantText.length > 0) {
+							updateRunPhase("writing");
+						}
 						setMessages((prev) =>
 							applyAssistantMessageUpdate(
 								prev,
@@ -1596,6 +1617,13 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 						const thinking = extractThinking(m.content);
 						const assistantText = extractContent(m.content);
 						const toolCalls = getToolCalls(m.content);
+						if (toolCalls.length > 0) {
+							updateRunPhase("processing");
+						} else if (thinking.length > 0 && assistantText.length === 0) {
+							updateRunPhase("thinking");
+						} else if (assistantText.length > 0) {
+							updateRunPhase("writing");
+						}
 						setMessages((prev) =>
 							finalizeAssistantMessageEnd(
 								prev,
@@ -1615,6 +1643,7 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 
 				case "tool_execution_start": {
 					const tid = ev.toolCallId ? String(ev.toolCallId) : undefined;
+					updateRunPhase("tool", ev.toolName);
 					const label = `🔧 ${ev.toolName}(${JSON.stringify(ev.args ?? {})})`;
 					setMessages((prev) => {
 						const existingIdx = tid
@@ -1640,6 +1669,7 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 
 				case "tool_execution_update":
 				case "tool_execution_end": {
+					updateRunPhase("tool", ev.toolName);
 					const tid = ev.toolCallId ? String(ev.toolCallId) : undefined;
 					const isError = ev.type === "tool_execution_end" ? ev.isError : undefined;
 					const full = buildToolCallUpdateText(ev, isError);
@@ -1729,6 +1759,7 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 					break;
 
 				case "bash_update": {
+					updateRunPhase("bash");
 					const bashId = activeBashMsgIdRef.current;
 					if (!bashId) break;
 					const output = typeof ev.partialOutput === "string" ? ev.partialOutput : "";
@@ -1746,6 +1777,7 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 			fetchSessionStateFull,
 			addSystemMessage,
 			resetStreamingState,
+			updateRunPhase,
 		],
 	);
 
@@ -1924,6 +1956,7 @@ export function ChatProvider({ children }: { children: ReactNode }) {
 		pendingFollowUp,
 		retryState,
 		isCompacting,
+		runPhase,
 		extensionWidgets,
 		extensionStatuses,
 		extensionDialog,
diff --git a/frontend/src/routes/ChatPage.tsx b/frontend/src/routes/ChatPage.tsx
index 9f5740b..fbb30ba 100644
--- a/frontend/src/routes/ChatPage.tsx
+++ b/frontend/src/routes/ChatPage.tsx
@@ -13,6 +13,7 @@ export function ChatPage() {
 		pendingFollowUp,
 		isStreaming,
 		isCompacting,
+		runPhase,
 		retryState,
 		extensionWidgets,
 		extensionDialog,
@@ -31,6 +32,7 @@ export function ChatPage() {
 			<RunStatusBar
 				isStreaming={isStreaming}
 				isCompacting={isCompacting}
+				runPhase={runPhase}
 				retryState={retryState}
 				onAbort={() => void abortStream()}
 				onAbortRetry={() => void abortRetry()}
diff --git a/frontend/src/types/runPhase.ts b/frontend/src/types/runPhase.ts
new file mode 100644
index 0000000..d777e63
--- /dev/null
+++ b/frontend/src/types/runPhase.ts
@@ -0,0 +1,13 @@
+export type RunPhase =
+	| "starting"
+	| "thinking"
+	| "writing"
+	| "tool"
+	| "bash"
+	| "processing";
+
+export interface RunPhaseState {
+	phase: RunPhase;
+	detail?: string;
+	startedAt: number;
+}
diff --git a/frontend/src/utils/runPhase.ts b/frontend/src/utils/runPhase.ts
new file mode 100644
index 0000000..ab68e22
--- /dev/null
+++ b/frontend/src/utils/runPhase.ts
@@ -0,0 +1,41 @@
+import type { RunPhase } from "../types/runPhase";
+
+const TOOL_LABELS: Record<string, string> = {
+	Read: "读取文件",
+	Write: "写入文件",
+	Edit: "编辑文件",
+	Grep: "搜索代码",
+	Glob: "查找文件",
+	Shell: "执行命令",
+	Task: "启动子任务",
+	WebSearch: "搜索网页",
+	WebFetch: "获取网页",
+	SemanticSearch: "语义搜索",
+	Delete: "删除文件",
+	AskQuestion: "等待确认",
+};
+
+function formatToolDetail(name: string): string {
+	const trimmed = name.trim();
+	if (!trimmed) return "工具";
+	return TOOL_LABELS[trimmed] ?? trimmed;
+}
+
+export function formatRunPhaseLabel(phase: RunPhase, detail?: string): string {
+	switch (phase) {
+		case "starting":
+			return "等待模型响应…";
+		case "thinking":
+			return "思考中…";
+		case "writing":
+			return "撰写回复中…";
+		case "tool":
+			return `调用 ${formatToolDetail(detail ?? "工具")}…`;
+		case "bash":
+			return "运行命令…";
+		case "processing":
+			return "处理结果中…";
+		default:
+			return "生成中…";
+	}
+}