broadteam · Oct 14, 2026
diff --git a/crates/wb-switch-core/src/modules/account.rs b/crates/wb-switch-core/src/modules/account.rs
@@ -140,6 +140,8 @@ pub fn account_meta(acc: &Value) -> Value {
         "refreshExpiresAt": display_value(acc, "refreshExpiresAt"),
         "refreshedAt": display_value(acc, "refreshedAt"),
         "createdAt": display_value(acc, "createdAt"),
+        "lastUsedAt": display_value(acc, "lastUsedAt"),
+        "lastUsedClient": display_value(acc, "lastUsedClient"),
         "needsRelogin": acc.get("needs_relogin").and_then(|v| v.as_bool()) == Some(true),
         "needsReloginReason": display_value(acc, "needs_relogin_reason"),
         // 企业版标记（issue #167）：读取时判定，供前端展示「企业版」徽标，历史数据零迁移。
@@ -276,8 +278,8 @@ pub fn upsert_collected_account(accounts: &mut Vec<Value>, mut collected: Value)
                 }
             }
         }
-        // 本地展示字段（备注 / 显示选择）不来自官方采集：采集结果缺失时保留已有值。
-        for key in ["note", "displayField"] {
+        // 本地字段（备注 / 显示选择 / 最后使用）不来自官方采集：采集结果缺失时保留已有值。
+        for key in ["note", "displayField", "lastUsedAt", "lastUsedClient"] {
             if collected.get(key).is_none() {
                 if let Some(v) = existing.get(key) {
                     collected[key] = v.clone();
@@ -397,6 +399,52 @@ pub fn update_account_display_in(
     Ok(accounts[index].clone())
 }
 
+/// 「最后使用」记账的来源端标识，取值与前端 `ToolId`（`src/lib/supported-tools.ts`）一致。
+pub const USED_CLIENT_WORKBUDDY: &str = "workbuddy";
+pub const USED_CLIENT_CODEBUDDY_CLI: &str = "codebuddyCli";
+pub const USED_CLIENT_CODEBUDDY_IDE: &str = "codebuddyIde";
+pub const USED_CLIENT_VSCODE_EXT: &str = "vscodeExt";
+pub const USED_CLIENT_JETBRAINS: &str = "jetbrains";
+
+/// 记录一次「该账号被切为某端的当前账号」：写入 `lastUsedAt`（毫秒）与 `lastUsedClient`。
+///
+/// 只补丁这两个本地字段，不触碰 token 等官方数据。由各端的切换收尾调用，
+/// 此时切换已经生效，记账失败只影响「最后使用」展示，调用方忽略返回值即可。
+pub fn mark_used(account_id: &str, client: &str) -> std::io::Result<()> {
+    let mut accounts = load_accounts();
+    if !mark_used_in(&mut accounts, account_id, client, now_ms()) {
+        return Err(std::io::Error::new(
+            std::io::ErrorKind::NotFound,
+            "账号不存在",
+        ));
+    }
+    save_accounts(&accounts)
+}
+
+/// 「最后使用」记账的内存实现（不落盘，便于单测）。返回是否命中账号。
+pub fn mark_used_in(
+    accounts: &mut [Value],
+    account_id: &str,
+    client: &str,
+    timestamp: i64,
+) -> bool {
+    let index = accounts
+        .iter()
+        .position(|a| get_str(a, "id").as_deref() == Some(account_id));
+    let Some(index) = index else {
+        return false;
+    };
+    let Some(obj) = accounts[index].as_object_mut() else {
+        return false;
+    };
+    obj.insert("lastUsedAt".to_string(), json!(timestamp));
+    obj.insert(
+        "lastUsedClient".to_string(),
+        Value::String(client.to_string()),
+    );
+    true
+}
+
 /// 覆盖写入的内存实现：按 id 覆盖；id 缺失或未命中时回退按 uid 收敛到已有
 /// 记录；仍无归属才追加，且追加前补 id。
 ///
@@ -425,9 +473,9 @@ fn upsert_account_in(accounts: &mut Vec<Value>, updated: &Value) {
     if let Some(index) = matched_index {
         let mut next = updated.clone();
         inherit_existing_variant(&accounts[index], &mut next);
-        // 本地展示字段（备注 / 显示选择）不从官方数据来：updated 缺失时保留已有值。
+        // 本地字段（备注 / 显示选择 / 最后使用）不从官方数据来：updated 缺失时保留已有值。
         if let Some(obj) = next.as_object_mut() {
-            for key in ["note", "displayField"] {
+            for key in ["note", "displayField", "lastUsedAt", "lastUsedClient"] {
                 if !obj.contains_key(key) {
                     if let Some(v) = accounts[index].get(key) {
                         obj.insert(key.to_string(), v.clone());
@@ -1179,6 +1227,65 @@ mod tests {
         assert_eq!(accounts[0]["note"], "工作号");
         assert_eq!(accounts[0]["displayField"], "phone");
     }
+
+    // -----------------------------------------------------------------------
+    // 最后使用记账
+    // -----------------------------------------------------------------------
+
+    #[test]
+    fn mark_used_records_timestamp_and_client() {
+        let mut accounts = vec![account("a-1", Some("uid-1"), "小明", None)];
+
+        assert!(mark_used_in(
+            &mut accounts,
+            "a-1",
+            USED_CLIENT_WORKBUDDY,
+            1_700_000_000_000
+        ));
+        assert_eq!(accounts[0]["lastUsedAt"], 1_700_000_000_000_i64);
+        assert_eq!(accounts[0]["lastUsedClient"], "workbuddy");
+        let meta = account_meta(&accounts[0]);
+        assert_eq!(meta["lastUsedAt"], 1_700_000_000_000_i64);
+        assert_eq!(meta["lastUsedClient"], "workbuddy");
+
+        // 再次切到另一端：时间与来源端一起更新，其余字段不动。
+        assert!(mark_used_in(
+            &mut accounts,
+            "a-1",
+            USED_CLIENT_VSCODE_EXT,
+            1_700_000_009_999
+        ));
+        assert_eq!(accounts[0]["lastUsedClient"], "vscodeExt");
+        assert_eq!(accounts[0]["nickname"], "小明");
+
+        assert!(
+            !mark_used_in(&mut accounts, "missing", USED_CLIENT_WORKBUDDY, 1),
+            "未知账号不记账"
+        );
+    }
+
+    #[test]
+    fn account_meta_without_last_used_is_null() {
+        let meta = account_meta(&account("a-1", Some("uid-1"), "小明", None));
+        assert!(meta["lastUsedAt"].is_null());
+        assert!(meta["lastUsedClient"].is_null());
+    }
+
+    /// 扫码重登 / 本机导入重建的记录不得丢「最后使用」。
+    #[test]
+    fn collected_upsert_preserves_last_used() {
+        let mut existing = account("a-1", Some("uid-1"), "小明", None);
+        existing["lastUsedAt"] = json!(1_700_000_000_000_i64);
+        existing["lastUsedClient"] = json!("workbuddy");
+        let mut accounts = vec![existing];
+
+        let saved = upsert_collected_account(
+            &mut accounts,
+            account("a-1", Some("uid-1"), "小明（官方更新）", None),
+        );
+        assert_eq!(saved["lastUsedAt"], 1_700_000_000_000_i64);
+        assert_eq!(saved["lastUsedClient"], "workbuddy");
+    }
 }
 
 // 手动添加账号（token 方式）已随 UI 入口「手动添加」一并下线；

diff --git a/crates/wb-switch-core/src/modules/codebuddy_cli.rs b/crates/wb-switch-core/src/modules/codebuddy_cli.rs
@@ -1504,6 +1504,9 @@ pub fn switch_active_account(account_id: &str) -> Result<Value, String> {
         }
     }
 
+    // CLI 默认账号已改写成功，最后使用记账失败只影响展示，不再回头报错。
+    let _ = account::mark_used(&canonical_id, account::USED_CLIENT_CODEBUDDY_CLI);
+
     let region_changed = previous_variant != Some(variant);
 
     Ok(json!({

diff --git a/crates/wb-switch-core/src/modules/codebuddy_cn_ide.rs b/crates/wb-switch-core/src/modules/codebuddy_cn_ide.rs
@@ -1260,6 +1260,10 @@ pub(crate) fn inject_session_and_finish(
     })?;
 
     set_active_account_id(account_id)?;
+    // 凭证已注入成功，最后使用记账失败只影响展示，不再回头报错。
+    if let Some(id) = get_str(acc, "id") {
+        let _ = account::mark_used(&id, account::USED_CLIENT_CODEBUDDY_IDE);
+    }
 
     if restart {
         eprintln!("[codebuddy-cn-ide] launching CodeBuddy CN…");

diff --git a/crates/wb-switch-core/src/modules/codebuddy_ide.rs b/crates/wb-switch-core/src/modules/codebuddy_ide.rs
@@ -1112,6 +1112,10 @@ pub(crate) fn inject_session_and_finish(
     })?;
 
     set_active_account_id(account_id)?;
+    // 凭证已注入成功，最后使用记账失败只影响展示，不再回头报错。
+    if let Some(id) = get_str(acc, "id") {
+        let _ = account::mark_used(&id, account::USED_CLIENT_CODEBUDDY_IDE);
+    }
 
     if restart {
         eprintln!("[codebuddy-ide] launching CodeBuddy…");

diff --git a/crates/wb-switch-core/src/modules/jetbrains.rs b/crates/wb-switch-core/src/modules/jetbrains.rs
@@ -943,6 +943,10 @@ fn switch_after_close_inner(
     }
 
     set_active_account_id(account_id)?;
+    // 凭证已注入成功，最后使用记账失败只影响展示，不再回头报错。
+    if let Some(id) = get_str(&acc, "id") {
+        let _ = account::mark_used(&id, account::USED_CLIENT_JETBRAINS);
+    }
 
     let mut restarted = false;
     let mut relaunch_error: Option<String> = None;

diff --git a/crates/wb-switch-core/src/modules/switch.rs b/crates/wb-switch-core/src/modules/switch.rs
@@ -277,6 +277,10 @@ pub fn switch_account(
         launch_workbuddy(variant, Some(&progress))?;
     }
     progress("切换完成");
+    // 切换已生效，最后使用记账失败只影响展示，不再回头报错。
+    if let Some(id) = account::get_str(&acc, "id") {
+        let _ = account::mark_used(&id, account::USED_CLIENT_WORKBUDDY);
+    }
 
     let mut result = json!({
         "ok": true,

diff --git a/crates/wb-switch-core/src/modules/vscode_ext.rs b/crates/wb-switch-core/src/modules/vscode_ext.rs
@@ -830,6 +830,10 @@ fn switch_account_after_close_inner(
         .map_err(describe_inject_error)?;
 
     set_active_account_id(account_id)?;
+    // 凭证已注入成功，最后使用记账失败只影响展示，不再回头报错。
+    if let Some(id) = get_str(&acc, "id") {
+        let _ = account::mark_used(&id, account::USED_CLIENT_VSCODE_EXT);
+    }
 
     let mut restarted = false;
     let mut relaunch_error: Option<String> = None;

diff --git a/src/components/account-card.tsx b/src/components/account-card.tsx
@@ -1,4 +1,4 @@
-import { ArrowRight, CalendarCheck2, CalendarDays, CalendarOff, Check, CircleCheck, Clock3, Coins, Ellipsis, Gauge, Info, Loader2, PackageOpen, PlaneTakeoff, RefreshCw, Sparkles, Star, Trash2 } from "lucide-react";
+import { ArrowRight, CalendarCheck2, CalendarDays, CalendarOff, Check, CircleCheck, Clock3, Coins, Ellipsis, Gauge, History, Info, Loader2, PackageOpen, PlaneTakeoff, RefreshCw, Sparkles, Star, Trash2 } from "lucide-react";
 import { useEffect, useState, type ReactNode } from "react";
 
 import { Badge } from "@/components/ui/badge";
@@ -18,6 +18,7 @@ import type { ToolId } from "@/lib/supported-tools";
 import { cn } from "@/lib/utils";
 import { accountIdentity, displayName } from "@/lib/account-display";
 import { avatarTone } from "@/lib/avatar-tone";
+import { formatRelativeTime, usedClientLabel } from "@/lib/account-order";
 import { creditResourceName } from "@/lib/credit-package-names";
 import { demoModeEnabled } from "@/lib/demo-mode";
 import type { AccountMeta, CreditExpiry, CreditResource, RateLimitEntry, TravelStatus } from "@/lib/types";
@@ -57,6 +58,13 @@ function formatCreditUpdatedAt(ts: number | undefined): string {
   return `${String(date.getHours()).padStart(2, "0")}:${String(date.getMinutes()).padStart(2, "0")}`;
 }
 
+/** 「最后使用」提示文案：来源端 + 相对时间（括号内为精确时刻）。 */
+function formatLastUsedTooltip(account: AccountMeta, now: number): string {
+  if (!account.lastUsedAt) return "";
+  const client = usedClientLabel(account.lastUsedClient);
+  return `最近切换${client ? ` · ${client}` : ""} · ${formatRelativeTime(account.lastUsedAt, now)}（${formatFullDateTime(account.lastUsedAt)}）`;
+}
+
 function expiryClass(expired: boolean, expiringSoon: boolean): string {
   if (expired) return "text-destructive";
   if (expiringSoon) return "text-orange-600";
@@ -278,6 +286,8 @@ interface Props {
   /** 该账号积分最近一次查询完成时间（时间戳） */
   creditUpdatedAt?: number;
   creditPriority?: boolean;
+  /** 当前档位内「最近切换」的账号：列表里只有这一个渲染标记，用于回答「刚才切了哪个」。 */
+  mostRecentlyUsed?: boolean;
   workbuddyActive?: boolean;
   codebuddyCliConfigured?: boolean;
   codebuddyCliActive?: boolean;
@@ -409,7 +419,7 @@ function CreditResourceRow({ resource, compact, placeholderLabel }: { resource?:
   );
 }
 
-export function AccountCard({ account, onDelete, onCheckin, onRefresh, onShowInfo, onSwitch, todayCheckedIn, autoCheckinAllowed, travelStatus, rateLimits, credit, creditLoading, creditUpdatedAt, creditPriority, workbuddyActive, codebuddyCliConfigured, codebuddyCliActive, codebuddyCliBusy, onSwitchCodebuddyCli, codebuddyCliLoading, codebuddyCnIdeAvailable, codebuddyCnIdeActive, codebuddyCnIdeBusy, codebuddyCnIdeLoading, onSwitchCodebuddyCnIde, vscodeExtInstalled, vscodeExtExtensionInstalled, vscodeExtAvailable, vscodeExtActive, vscodeExtBusy, vscodeExtLoading, onSwitchVscodeExt, jetbrainsInstalled, jetbrainsPluginInstalled, jetbrainsAvailable, jetbrainsActive, jetbrainsBusy, jetbrainsLoading, onSwitchJetbrains, enabledTools, featuresDisabled = true, compact = false }: Props) {
+export function AccountCard({ account, onDelete, onCheckin, onRefresh, onShowInfo, onSwitch, todayCheckedIn, autoCheckinAllowed, travelStatus, rateLimits, credit, creditLoading, creditUpdatedAt, creditPriority, mostRecentlyUsed, workbuddyActive, codebuddyCliConfigured, codebuddyCliActive, codebuddyCliBusy, onSwitchCodebuddyCli, codebuddyCliLoading, codebuddyCnIdeAvailable, codebuddyCnIdeActive, codebuddyCnIdeBusy, codebuddyCnIdeLoading, onSwitchCodebuddyCnIde, vscodeExtInstalled, vscodeExtExtensionInstalled, vscodeExtAvailable, vscodeExtActive, vscodeExtBusy, vscodeExtLoading, onSwitchVscodeExt, jetbrainsInstalled, jetbrainsPluginInstalled, jetbrainsAvailable, jetbrainsActive, jetbrainsBusy, jetbrainsLoading, onSwitchJetbrains, enabledTools, featuresDisabled = true, compact = false }: Props) {
   /** 支持工具开关：关闭的端整块不渲染（缺省视为开启）。 */
   const toolEnabled = (id: ToolId) => enabledTools?.[id] !== false;
   const [resourcesOpen, setResourcesOpen] = useState(false);
@@ -478,6 +488,16 @@ export function AccountCard({ account, onDelete, onCheckin, onRefresh, onShowInf
           <TooltipContent side="top">建议优先使用</TooltipContent>
         </Tooltip>
       )}
+      {mostRecentlyUsed && account.lastUsedAt && (
+        <Tooltip>
+          <TooltipTrigger asChild>
+            <Badge variant="secondary" className={cn(chipClass, "px-1")} aria-label="最近切换">
+              <History className="size-3.5" />
+            </Badge>
+          </TooltipTrigger>
+          <TooltipContent side="top">{formatLastUsedTooltip(account, now)}</TooltipContent>
+        </Tooltip>
+      )}
       {!compact && activeProductCount >= 2 && <Badge variant="secondary" className={cn(chipClass, "text-muted-foreground")}>{activeProductCount} 个工具正在使用</Badge>}
     </>
   );

diff --git a/src/components/account-info-dialog.tsx b/src/components/account-info-dialog.tsx
@@ -17,6 +17,7 @@ import { Label } from "@/components/ui/label";
 import { RadioGroup, RadioGroupItem } from "@/components/ui/radio-group";
 import * as api from "@/lib/api";
 import { accountIdentity } from "@/lib/account-display";
+import { formatRelativeTime, usedClientLabel } from "@/lib/account-order";
 import { avatarTone } from "@/lib/avatar-tone";
 import { cn } from "@/lib/utils";
 import { accountVariant, variantLabel } from "@/lib/variant";
@@ -40,6 +41,26 @@ interface Props {
   onSaved?: (account: AccountMeta) => void;
 }
 
+/**
+ * 「最后使用」行文案：相对时间 + 精确时刻 + 来源端；从未切换给出明确说明。
+ * 只统计通过本应用发起的切换，在客户端里自行登录/登出不计入。
+ */
+function lastUsedText(account: AccountMeta): string {
+  const at = account.lastUsedAt;
+  if (!at) return "从未切换";
+  const date = new Date(at);
+  const absolute = Number.isNaN(date.getTime())
+    ? "—"
+    : date.toLocaleString("zh-CN", {
+        month: "2-digit",
+        day: "2-digit",
+        hour: "2-digit",
+        minute: "2-digit",
+      });
+  const client = usedClientLabel(account.lastUsedClient);
+  return [`${formatRelativeTime(at, Date.now())}`, `${absolute}`, client].filter(Boolean).join(" · ");
+}
+
 /**
  * 账号信息弹框：查看账号信息、编辑本地备注、选择卡片显示字段。
  * 备注与显示字段只保存在本机账号库，不影响官方登录数据。
@@ -151,13 +172,13 @@ export function AccountInfoDialog({ open, onOpenChange, account, onSaved }: Prop
         {/* 次级字段：企业名与 UID（等宽 + 一键复制）。 */}
         <dl className="divide-y divide-border/70 rounded-lg border text-xs">
           <div className="flex items-center gap-3 px-3 py-2.5">
-            <dt className="w-12 shrink-0 text-muted-foreground">企业名</dt>
+            <dt className="w-14 shrink-0 text-muted-foreground">企业名</dt>
             <dd className="min-w-0 flex-1 truncate font-medium" title={current.enterpriseName ?? ""}>
               {current.enterpriseName || "—"}
             </dd>
           </div>
           <div className="flex items-center gap-3 px-3 py-2.5">
-            <dt className="w-12 shrink-0 text-muted-foreground">UID</dt>
+            <dt className="w-14 shrink-0 text-muted-foreground">UID</dt>
             <dd
               className="min-w-0 flex-1 truncate font-mono text-[11px] text-muted-foreground"
               title={uid ?? ""}
@@ -178,6 +199,15 @@ export function AccountInfoDialog({ open, onOpenChange, account, onSaved }: Prop
           </div>
         </dl>
 
+        {/* 最后使用：只记本应用触发的切换，供「刚才切了哪个」定位（时间 + 来源端）。 */}
+        <div className="rounded-lg border px-3 py-2.5 text-xs">
+          <div className="flex items-center gap-3">
+            <span className="w-14 shrink-0 text-muted-foreground">最后使用</span>
+            <span className="min-w-0 flex-1 truncate font-medium" title={lastUsedText(current)}>
+              {lastUsedText(current)}
+            </span>
+          </div>
+        </div>
         <div className="space-y-1.5">
           <div className="flex items-baseline justify-between">
             <Label htmlFor="account-note" className="text-xs font-medium text-muted-foreground">