diff --git a/.helloagents/CHANGELOG.md b/.helloagents/CHANGELOG.md
index 17bddc9..eef62b4 100644
--- a/.helloagents/CHANGELOG.md
+++ b/.helloagents/CHANGELOG.md
@@ -26,9 +26,9 @@
 - **[proxy]**: 失败判定简化为非 2xx/超时即失败
   - 方案: [202603141749_usage-summary](archive/2026-03/202603141749_usage-summary/)
   - 文件: apps/worker/src/routes/proxy.ts
-- **[admin-ui/usage]**: 使用日志新增概述卡片（总量/成功/失败/错误率/平均延迟）
-  - 方案: [202603141749_usage-summary](archive/2026-03/202603141749_usage-summary/)
-  - 文件: apps/ui/src/core/utils.ts, apps/ui/src/features/UsageView.tsx, tests/ui/usage.test.ts, .helloagents/modules/usage.md, .helloagents/modules/admin-ui.md
+- **[usage/proxy]**: 使用日志记录上游失败详情并在日志状态列展示
+  - 方案: [202603141815_usage-log-status](archive/2026-03/202603141815_usage-log-status/)
+  - 文件: apps/worker/migrations/0005_add_usage_error_fields.sql, apps/worker/src/db/schema.sql, apps/worker/src/services/usage.ts, apps/worker/src/routes/proxy.ts, apps/ui/src/core/types.ts, apps/ui/src/core/utils.ts, apps/ui/src/features/UsageView.tsx, tests/ui/usage-status.test.ts, .helloagents/modules/usage.md, .helloagents/modules/admin-ui.md
 - **[worker/proxy]**: 移除临时调试日志（请求入口/出口与上游响应汇总）
   - 类型: 微调（无方案包）
   - 文件: apps/worker/src/index.ts, apps/worker/src/routes/proxy.ts
diff --git a/.helloagents/modules/admin-ui.md b/.helloagents/modules/admin-ui.md
index acb7126..f7472ba 100644
--- a/.helloagents/modules/admin-ui.md
+++ b/.helloagents/modules/admin-ui.md
@@ -25,7 +25,7 @@
 - done-hub 站点仅使用 base_url，不再维护多地址输入
 - 站点连通测试提示令牌成功/失败统计
 - 使用日志支持本地分页（默认 50 条）与固定高度滚动，并展示令牌、输入/输出 tokens、首 token 延迟、流式与推理强度
-- 使用日志顶部展示概述（总量/成功/失败/错误率/平均延迟）
+- 使用日志状态列展示详细失败原因（状态码/错误码/摘要）
 - 令牌管理采用列表视图（默认每页 10 条），生成令牌使用弹窗表单，并展示创建时间与前缀
 - 站点管理内置一键签到入口，展示今日签到结果（基于后台写回的 `last_checkin_*`）
 - 系统设置增加定时签到开关与时间（中国时间）
diff --git a/.helloagents/modules/usage.md b/.helloagents/modules/usage.md
index afd03fa..d90d9b6 100644
--- a/.helloagents/modules/usage.md
+++ b/.helloagents/modules/usage.md
@@ -14,7 +14,7 @@
 - 查询结果附带渠道与令牌名称
 - usage_logs 记录输入/输出 tokens、首 token 延迟、流式标记与推理强度
 - 推理强度来自请求体 `reasoning` / `reasoning_effort` 字段
-- 前端使用日志列表计算概述（总量/成功/失败/错误率/平均延迟）
+- usage_logs 记录上游失败详情（status/code/message），用于日志状态展示
 
 ## 依赖关系
 - `usage_logs` 表
diff --git a/apps/ui/src/core/types.ts b/apps/ui/src/core/types.ts
index ace58bb..5c56672 100644
--- a/apps/ui/src/core/types.ts
+++ b/apps/ui/src/core/types.ts
@@ -60,6 +60,9 @@ export type UsageLog = {
 	stream?: boolean | number | null;
 	reasoning_effort?: string | number | null;
 	status: string;
+	upstream_status?: number | null;
+	error_code?: string | null;
+	error_message?: string | null;
 	created_at: string;
 };
 
diff --git a/apps/ui/src/core/utils.ts b/apps/ui/src/core/utils.ts
index 1eb7861..eb32591 100644
--- a/apps/ui/src/core/utils.ts
+++ b/apps/ui/src/core/utils.ts
@@ -79,40 +79,63 @@ export const buildPageItems = (current: number, total: number): PageItem[] => {
 	});
 };
 
-export type UsageSummary = {
-	total: number;
-	success: number;
-	failed: number;
-	errorRate: number;
-	avgLatencyMs: number | null;
-	totalTokens: number;
+const truncateText = (value: string | null | undefined, max = 80) => {
+	if (!value) {
+		return null;
+	}
+	const trimmed = value.trim();
+	if (!trimmed) {
+		return null;
+	}
+	return trimmed.length > max ? `${trimmed.slice(0, max)}...` : trimmed;
 };
 
-export const summarizeUsageLogs = (logs: UsageLog[]): UsageSummary => {
-	const total = logs.length;
-	const success = logs.filter((log) => log.status === "ok").length;
-	const failed = total - success;
-	let latencySum = 0;
-	let latencyCount = 0;
-	let totalTokens = 0;
-	for (const log of logs) {
-		const latency = log.latency_ms;
-		if (latency !== null && latency !== undefined && !Number.isNaN(latency)) {
-			latencySum += latency;
-			latencyCount += 1;
-		}
-		if (log.total_tokens !== null && log.total_tokens !== undefined) {
-			totalTokens += log.total_tokens;
-		} else {
-			totalTokens += (log.prompt_tokens ?? 0) + (log.completion_tokens ?? 0);
-		}
+const describeError = (status?: number | null, code?: string | null) => {
+	const normalized = (code ?? "").toLowerCase();
+	if (status === 401 || status === 403) {
+		return "鉴权失败";
 	}
+	if (status === 429 || normalized.includes("rate")) {
+		return "触发限流";
+	}
+	if (
+		normalized.includes("insufficient") ||
+		normalized.includes("quota") ||
+		normalized.includes("balance")
+	) {
+		return "余额不足";
+	}
+	if (normalized.includes("model")) {
+		return "模型不可用";
+	}
+	return null;
+};
+
+export type UsageStatusDetail = {
+	label: string;
+	message: string | null;
+	tone: "success" | "error";
+};
+
+export const buildUsageStatusDetail = (log: UsageLog): UsageStatusDetail => {
+	if (log.status === "ok") {
+		return { label: "成功", message: null, tone: "success" };
+	}
+	const parts: string[] = [];
+	if (log.upstream_status !== null && log.upstream_status !== undefined) {
+		parts.push(String(log.upstream_status));
+	}
+	if (log.error_code) {
+		parts.push(log.error_code);
+	}
+	const hint = describeError(log.upstream_status, log.error_code ?? null);
+	if (hint) {
+		parts.push(hint);
+	}
+	const suffix = parts.length > 0 ? ` (${parts.join(" / ")})` : "";
 	return {
-		total,
-		success,
-		failed,
-		errorRate: total > 0 ? (failed / total) * 100 : 0,
-		avgLatencyMs: latencyCount > 0 ? latencySum / latencyCount : null,
-		totalTokens,
+		label: `失败${suffix}`,
+		message: truncateText(log.error_message),
+		tone: "error",
 	};
 };
diff --git a/apps/ui/src/features/UsageView.tsx b/apps/ui/src/features/UsageView.tsx
index 7370246..6eff7f6 100644
--- a/apps/ui/src/features/UsageView.tsx
+++ b/apps/ui/src/features/UsageView.tsx
@@ -1,6 +1,10 @@
 import { useEffect, useMemo, useState } from "hono/jsx/dom";
 import type { UsageLog } from "../core/types";
-import { buildPageItems, formatDateTime, summarizeUsageLogs } from "../core/utils";
+import {
+	buildPageItems,
+	buildUsageStatusDetail,
+	formatDateTime,
+} from "../core/utils";
 
 type UsageViewProps = {
 	usage: UsageLog[];
@@ -42,7 +46,6 @@ export const UsageView = ({ usage, onRefresh }: UsageViewProps) => {
 	const [pageSize, setPageSize] = useState(50);
 	const [page, setPage] = useState(1);
 	const total = usage.length;
-	const summary = useMemo(() => summarizeUsageLogs(usage), [usage]);
 	const totalPages = useMemo(
 		() => Math.max(1, Math.ceil(total / pageSize)),
 		[total, pageSize],
@@ -86,31 +89,6 @@ export const UsageView = ({ usage, onRefresh }: UsageViewProps) => {
 					</button>
 				</div>
 			</div>
-			<div class="mt-4 rounded-xl border border-stone-200 bg-stone-50 px-4 py-3">
-				<div class="flex flex-wrap items-center gap-3 text-xs text-stone-600">
-					<span class="font-semibold text-stone-700">
-						概述（当前展示 {summary.total} 条）
-					</span>
-					<span class="rounded-full bg-emerald-100 px-3 py-1 font-semibold text-emerald-700">
-						成功 {summary.success}
-					</span>
-					<span class="rounded-full bg-rose-100 px-3 py-1 font-semibold text-rose-700">
-						失败 {summary.failed}
-					</span>
-					<span class="rounded-full bg-stone-200 px-3 py-1 font-semibold text-stone-700">
-						错误率 {summary.total === 0 ? "-" : `${summary.errorRate.toFixed(1)}%`}
-					</span>
-					<span class="rounded-full bg-stone-200 px-3 py-1 font-semibold text-stone-700">
-						平均延迟{" "}
-						{summary.avgLatencyMs === null
-							? "-"
-							: `${summary.avgLatencyMs.toFixed(0)} ms`}
-					</span>
-					<span class="rounded-full bg-stone-200 px-3 py-1 font-semibold text-stone-700">
-						总 Tokens {summary.totalTokens}
-					</span>
-				</div>
-			</div>
 			<div class="mt-4 overflow-hidden rounded-xl border border-stone-200">
 				<div class="h-[420px] overflow-auto sm:h-[520px]">
 					<table class="min-w-[960px] w-full border-collapse text-xs sm:text-sm">
@@ -162,7 +140,9 @@ export const UsageView = ({ usage, onRefresh }: UsageViewProps) => {
 									</td>
 								</tr>
 							) : (
-								pagedUsage.map((log) => (
+								pagedUsage.map((log) => {
+									const statusDetail = buildUsageStatusDetail(log);
+									return (
 									<tr class="hover:bg-stone-50" key={log.id}>
 										<td class="border-b border-stone-200 px-3 py-2.5 text-left text-xs text-stone-700 sm:text-sm">
 											{formatDateTime(log.created_at)}
@@ -195,10 +175,24 @@ export const UsageView = ({ usage, onRefresh }: UsageViewProps) => {
 											{log.reasoning_effort ?? "-"}
 										</td>
 										<td class="border-b border-stone-200 px-3 py-2.5 text-left text-xs text-stone-700 sm:text-sm">
-											{log.status}
+											<div
+												class={
+													statusDetail.tone === "success"
+														? "font-semibold text-emerald-700"
+														: "font-semibold text-rose-700"
+												}
+											>
+												{statusDetail.label}
+											</div>
+											{statusDetail.message ? (
+												<div class="mt-1 text-[11px] text-stone-500">
+													{statusDetail.message}
+												</div>
+											) : null}
 										</td>
 									</tr>
-								))
+									);
+								})
 							)}
 						</tbody>
 					</table>
diff --git a/apps/worker/migrations/0005_add_usage_error_fields.sql b/apps/worker/migrations/0005_add_usage_error_fields.sql
new file mode 100644
index 0000000..6ce4dba
--- /dev/null
+++ b/apps/worker/migrations/0005_add_usage_error_fields.sql
@@ -0,0 +1,3 @@
+ALTER TABLE usage_logs ADD COLUMN upstream_status INTEGER;
+ALTER TABLE usage_logs ADD COLUMN error_code TEXT;
+ALTER TABLE usage_logs ADD COLUMN error_message TEXT;
diff --git a/apps/worker/src/db/schema.sql b/apps/worker/src/db/schema.sql
index 6c68c95..d66699c 100644
--- a/apps/worker/src/db/schema.sql
+++ b/apps/worker/src/db/schema.sql
@@ -65,6 +65,9 @@ CREATE TABLE IF NOT EXISTS usage_logs (
   stream INTEGER,
   reasoning_effort TEXT,
   status TEXT,
+  upstream_status INTEGER,
+  error_code TEXT,
+  error_message TEXT,
   created_at TEXT NOT NULL
 );
 
diff --git a/apps/worker/src/routes/proxy.ts b/apps/worker/src/routes/proxy.ts
index 2c33a82..15d2e0f 100644
--- a/apps/worker/src/routes/proxy.ts
+++ b/apps/worker/src/routes/proxy.ts
@@ -74,6 +74,54 @@ function scheduleDbWrite(
 	}
 }
 
+type ErrorDetails = {
+	upstreamStatus: number | null;
+	errorCode: string | null;
+	errorMessage: string | null;
+};
+
+function truncateMessage(value: string | null, max = 240): string | null {
+	if (!value) {
+		return null;
+	}
+	const trimmed = value.trim();
+	if (!trimmed) {
+		return null;
+	}
+	return trimmed.length > max ? `${trimmed.slice(0, max)}...` : trimmed;
+}
+
+async function extractErrorDetails(
+	response: Response,
+): Promise<{ errorCode: string | null; errorMessage: string | null }> {
+	const contentType = response.headers.get("content-type") ?? "";
+	if (contentType.includes("application/json")) {
+		const payload = await response.clone().json().catch(() => null);
+		if (payload && typeof payload === "object") {
+			const raw = payload as Record<string, unknown>;
+			const error = (raw.error ?? raw) as Record<string, unknown>;
+			const errorCode =
+				typeof error.code === "string"
+					? error.code
+					: typeof error.type === "string"
+						? error.type
+						: null;
+			const errorMessage =
+				typeof error.message === "string"
+					? error.message
+					: typeof raw.message === "string"
+						? raw.message
+						: null;
+			return {
+				errorCode,
+				errorMessage: truncateMessage(errorMessage),
+			};
+		}
+	}
+	const text = await response.clone().text().catch(() => "");
+	return { errorCode: null, errorMessage: truncateMessage(text) };
+}
+
 function channelSupportsModel(
 	channel: ChannelRecord,
 	model: string | null,
@@ -402,6 +450,7 @@ proxy.all("/*", tokenAuth, async (c) => {
 	let lastResponse: Response | null = null;
 	let lastChannel: ChannelRecord | null = null;
 	let lastRequestPath = targetPath;
+	let lastErrorDetails: ErrorDetails | null = null;
 	const start = Date.now();
 	let selectedChannel: ChannelRecord | null = null;
 	let selectedUpstreamProvider: ProviderType | null = null;
@@ -649,6 +698,7 @@ proxy.all("/*", tokenAuth, async (c) => {
 				selectedChannel = channel;
 				selectedUpstreamProvider = upstreamProvider;
 				selectedUpstreamModel = upstreamModel;
+				lastErrorDetails = null;
 				if (recordModel) {
 					scheduleDbWrite(
 						c,
@@ -662,6 +712,12 @@ proxy.all("/*", tokenAuth, async (c) => {
 				}
 				break;
 			}
+			const errorInfo = await extractErrorDetails(response);
+			lastErrorDetails = {
+				upstreamStatus: response.status,
+				errorCode: errorInfo.errorCode,
+				errorMessage: errorInfo.errorMessage,
+			};
 			if (recordModel) {
 				scheduleDbWrite(
 					c,
@@ -688,6 +744,13 @@ proxy.all("/*", tokenAuth, async (c) => {
 				reason: isTimeout ? "timeout" : "exception",
 				error: error instanceof Error ? error.message : String(error),
 			});
+			lastErrorDetails = {
+				upstreamStatus: null,
+				errorCode: isTimeout ? "timeout" : "exception",
+				errorMessage: truncateMessage(
+					error instanceof Error ? error.message : String(error),
+				),
+			};
 			if (recordModel) {
 				scheduleDbWrite(
 					c,
@@ -732,12 +795,23 @@ proxy.all("/*", tokenAuth, async (c) => {
 			stream: isStream,
 			reasoningEffort,
 			status: "error",
+			upstreamStatus: lastErrorDetails?.upstreamStatus ?? null,
+			errorCode: lastErrorDetails?.errorCode ?? "upstream_unavailable",
+			errorMessage: lastErrorDetails?.errorMessage ?? "upstream_unavailable",
 		});
 		return jsonError(c, 502, "upstream_unavailable", "upstream_unavailable");
 	}
 
 	const channelForUsage = selectedChannel ?? lastChannel;
 	if (channelForUsage && lastResponse) {
+		const errorDetails =
+			lastResponse.ok || selectedChannel
+				? null
+				: lastErrorDetails ?? {
+						upstreamStatus: lastResponse.status,
+						errorCode: null,
+						errorMessage: null,
+					};
 		const record = async (
 			usage: NormalizedUsage | null,
 			firstTokenLatencyMs?: number | null,
@@ -763,6 +837,13 @@ proxy.all("/*", tokenAuth, async (c) => {
 				stream: isStream,
 				reasoningEffort,
 				status: lastResponse.ok ? "ok" : "error",
+				upstreamStatus: lastResponse.ok
+					? null
+					: errorDetails?.upstreamStatus ?? lastResponse.status,
+				errorCode: lastResponse.ok ? null : errorDetails?.errorCode ?? null,
+				errorMessage: lastResponse.ok
+					? null
+					: errorDetails?.errorMessage ?? null,
 			});
 		};
 		const headerUsage = parseUsageFromHeaders(lastResponse.headers);
diff --git a/apps/worker/src/services/usage.ts b/apps/worker/src/services/usage.ts
index 68c1d3c..af8568a 100644
--- a/apps/worker/src/services/usage.ts
+++ b/apps/worker/src/services/usage.ts
@@ -15,6 +15,9 @@ export type UsageInput = {
 	stream?: boolean | number | null;
 	reasoningEffort?: string | number | null;
 	status?: string | null;
+	upstreamStatus?: number | null;
+	errorCode?: string | null;
+	errorMessage?: string | null;
 };
 
 /**
@@ -40,7 +43,7 @@ export async function recordUsage(
 			: String(input.reasoningEffort);
 	await db
 		.prepare(
-			"INSERT INTO usage_logs (id, token_id, channel_id, model, request_path, total_tokens, prompt_tokens, completion_tokens, cost, latency_ms, first_token_latency_ms, stream, reasoning_effort, status, created_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
+			"INSERT INTO usage_logs (id, token_id, channel_id, model, request_path, total_tokens, prompt_tokens, completion_tokens, cost, latency_ms, first_token_latency_ms, stream, reasoning_effort, status, upstream_status, error_code, error_message, created_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
 		)
 		.bind(
 			id,
@@ -57,6 +60,9 @@ export async function recordUsage(
 			streamValue,
 			reasoningValue,
 			input.status ?? "ok",
+			input.upstreamStatus ?? null,
+			input.errorCode ?? null,
+			input.errorMessage ?? null,
 			createdAt,
 		)
 		.run();
diff --git a/tests/ui/usage-status.test.ts b/tests/ui/usage-status.test.ts
new file mode 100644
index 0000000..d5119ad
--- /dev/null
+++ b/tests/ui/usage-status.test.ts
@@ -0,0 +1,39 @@
+import { describe, expect, it } from "vitest";
+import { buildUsageStatusDetail } from "../../apps/ui/src/core/utils";
+
+const buildLog = (partial: Partial<{ status: string; upstream_status: number | null; error_code: string | null; error_message: string | null }>) => ({
+	id: "1",
+	model: "gpt-4",
+	channel_id: "c1",
+	token_id: "t1",
+	total_tokens: 1,
+	latency_ms: 100,
+	status: partial.status ?? "ok",
+	upstream_status: partial.upstream_status ?? null,
+	error_code: partial.error_code ?? null,
+	error_message: partial.error_message ?? null,
+	created_at: "2026-03-14T00:00:00Z",
+});
+
+describe("usage status detail", () => {
+	it("renders success label", () => {
+		const detail = buildUsageStatusDetail(buildLog({ status: "ok" }) as any);
+		expect(detail.label).toBe("成功");
+		expect(detail.tone).toBe("success");
+	});
+
+	it("renders failure with status and code", () => {
+		const detail = buildUsageStatusDetail(
+			buildLog({
+				status: "error",
+				upstream_status: 403,
+				error_code: "authentication_error",
+				error_message: "Invalid API key",
+			}) as any,
+		);
+		expect(detail.label).toContain("失败");
+		expect(detail.label).toContain("403");
+		expect(detail.label).toContain("authentication_error");
+		expect(detail.message).toBe("Invalid API key");
+	});
+});
diff --git a/tests/ui/usage.test.ts b/tests/ui/usage.test.ts
deleted file mode 100644
index 656ef11..0000000
--- a/tests/ui/usage.test.ts
+++ /dev/null
@@ -1,32 +0,0 @@
-import { describe, expect, it } from "vitest";
-import { summarizeUsageLogs } from "../../apps/ui/src/core/utils";
-
-const buildLog = (partial: Partial<{ status: string; total_tokens: number | null; prompt_tokens: number | null; completion_tokens: number | null; latency_ms: number | null }>) => ({
-	id: "1",
-	model: "gpt-4",
-	channel_id: "c1",
-	token_id: "t1",
-	total_tokens: partial.total_tokens ?? null,
-	prompt_tokens: partial.prompt_tokens ?? null,
-	completion_tokens: partial.completion_tokens ?? null,
-	latency_ms: partial.latency_ms ?? null,
-	status: partial.status ?? "ok",
-	created_at: "2026-03-14T00:00:00Z",
-});
-
-describe("usage summary", () => {
-	it("summarizes success, failure, tokens, and latency", () => {
-		const logs = [
-			buildLog({ status: "ok", total_tokens: 20, latency_ms: 1000 }),
-			buildLog({ status: "error", total_tokens: 10, latency_ms: 3000 }),
-			buildLog({ status: "ok", total_tokens: null, prompt_tokens: 5, completion_tokens: 5, latency_ms: null }),
-		];
-		const summary = summarizeUsageLogs(logs as any);
-		expect(summary.total).toBe(3);
-		expect(summary.success).toBe(2);
-		expect(summary.failed).toBe(1);
-		expect(summary.totalTokens).toBe(40);
-		expect(Math.round(summary.errorRate)).toBe(33);
-		expect(summary.avgLatencyMs).toBe(2000);
-	});
-});