diff --git a/backend/internal/web/dist/index.html b/backend/internal/web/dist/index.html
index 2c645a3..aff6bf2 100644
--- a/backend/internal/web/dist/index.html
+++ b/backend/internal/web/dist/index.html
@@ -1,3 +1,3 @@
-<script type="module" crossorigin src="/assets/index-Ddm_ZeSC.js"></script>
-<link rel="stylesheet" crossorigin href="/assets/index-B0FW1DHS.css">
+<script type="module" crossorigin src="/assets/index-BUUH7ota.js"></script>
+<link rel="stylesheet" crossorigin href="/assets/index-DTBZgX1u.css">
 <div id="root"></div>
diff --git a/frontend/src/main.tsx b/frontend/src/main.tsx
index acd0bd9..e4dceb1 100644
--- a/frontend/src/main.tsx
+++ b/frontend/src/main.tsx
@@ -340,7 +340,7 @@ function Dashboard() {
             {accounts.map((x) => (
               <option key={x.id} value={x.id}>
                 {x.displayName}
-                {x.email ? " · " + x.email : ""}
+                {x.email ? " · " + maskEmail(x.email) : ""}
               </option>
             ))}
           </select>
@@ -364,7 +364,9 @@ function Dashboard() {
         <div>
           <small>Codex Account</small>
           <b>
-            {d.displayName} · {d.account.email || "尚未连接"}
+            {d.displayName} · {d.account.email
+              ? maskEmail(d.account.email)
+              : "尚未连接"}
           </b>
         </div>
         <span className="badge">{planLabel(d.account.planType)}</span>
@@ -437,10 +439,6 @@ function LimitCard({ x }: { x: Limit }) {
         <em style={{ width: left + "%", background: leftColor }} />
         <i style={{ width: used + "%" }} />
       </div>
-      <footer>
-        <span>已使用 {usedLabel}%</span>
-        <span style={{ color: leftColor }}>剩余 {leftLabel}%</span>
-      </footer>
     </div>
   );
 }
@@ -812,7 +810,7 @@ function CodexSettings() {
                   }}
                 />
                 <div className="account-meta">
-                  <span>{x.email || "尚未登录"}</span>
+                  <span>{x.email ? maskEmail(x.email) : "尚未登录"}</span>
                   <span>{planLabel(x.planType)}</span>
                   <span className={x.validationStatus === "mismatch" ? "error" : ""}>
                     {validationLabel(x)}
@@ -1156,6 +1154,22 @@ const duration = (v?: number) =>
       : v < 3600
         ? `${Math.floor(v / 60)} 分 ${v % 60} 秒`
         : `${(v / 3600).toFixed(1)} 小时`;
+const maskEmailPart = (part: string) => {
+  if (part.length <= 1) return "*";
+  if (part.length === 2) return part[0] + "*";
+  return part[0] + "*".repeat(part.length - 2) + part.at(-1);
+};
+const maskEmail = (email: string) => {
+  const at = email.lastIndexOf("@");
+  if (at < 1 || at === email.length - 1) return maskEmailPart(email);
+  const local = email.slice(0, at);
+  const domain = email.slice(at + 1).split(".");
+  return `${maskEmailPart(local)}@${domain
+    .map((part, index) =>
+      index === domain.length - 1 ? part : maskEmailPart(part),
+    )
+    .join(".")}`;
+};
 const planLabel = (plan?: string) => {
   if (!plan) return "未识别套餐";
   const labels: Record<string, string> = {
diff --git a/frontend/src/styles.css b/frontend/src/styles.css
index 2a6f813..ae619d5 100644
--- a/frontend/src/styles.css
+++ b/frontend/src/styles.css
@@ -295,10 +295,10 @@ header p {
   gap: 18px;
 }
 .limit {
-  padding: 24px;
+  padding: 20px;
   display: grid;
   grid-template-columns: 1fr auto;
-  gap: 16px;
+  gap: 12px;
   align-items: start;
 }
 .limit > small {
@@ -344,18 +344,6 @@ header p {
 .bar em {
   background: var(--green);
 }
-.limit footer {
-  grid-column: 1/-1;
-  border-top: 1px solid var(--border);
-  padding-top: 14px;
-  display: flex;
-  gap: 18px;
-  color: var(--muted);
-  font-size: 12px;
-}
-.limit footer span:last-child {
-  margin-left: auto;
-}
 .green {
   color: var(--green);
 }
@@ -682,8 +670,7 @@ a {
     text-align: left;
   }
   .limit > small,
-  .bar,
-  .limit footer {
+  .bar {
     grid-column: 1;
   }
 }
diff --git a/frontend/tests/settings-layout.spec.ts b/frontend/tests/settings-layout.spec.ts
index 0d9ab8b..6e3900e 100644
--- a/frontend/tests/settings-layout.spec.ts
+++ b/frontend/tests/settings-layout.spec.ts
@@ -169,3 +169,53 @@ test("Codex account cards fit within the viewport", async ({ page }) => {
   expect(overflow.documentWidth).toBeLessThanOrEqual(overflow.viewportWidth);
   expect(overflow.cardWidth).toBeLessThanOrEqual(overflow.contentWidth);
 });
+
+test("Codex account emails are masked everywhere they are displayed", async ({
+  page,
+}) => {
+  await page.route("**/api/v1/**", async (route) => {
+    const key = new URL(route.request().url()).pathname.replace("/api/v1/", "");
+    if (key === "dashboard")
+      return route.fulfill({
+        json: {
+          accountId: 1,
+          displayName: "默认账号",
+          account: {
+            email: "test@example.com",
+            planType: "plus",
+            connected: true,
+          },
+          limits: [
+            {
+              limitId: "primary",
+              windowType: "5h",
+              usedPercent: 25,
+              windowDurationMinutes: 300,
+              resetsAt: 0,
+            },
+          ],
+          summary: {},
+          usage: [],
+          fetchedAt: 0,
+          stale: false,
+        },
+      });
+    return route.fulfill({ json: responses[key] ?? {} });
+  });
+
+  await page.goto("/");
+  await expect(page.locator(".account-select")).toContainText("t**t@e*****e.com");
+  await expect(page.locator(".account b")).toContainText("t**t@e*****e.com");
+  await expect(page.getByText("已使用 25%", { exact: true })).toHaveCount(0);
+  await expect(page.getByText("剩余 75%", { exact: true })).toHaveCount(0);
+  await expect(page.locator(".bar")).toHaveAttribute(
+    "aria-label",
+    "5h：已使用 25%，剩余 75%",
+  );
+  await expect(page.locator("body")).not.toContainText("test@example.com");
+
+  await page.goto("/settings");
+  await page.getByRole("tab", { name: "Codex" }).click();
+  await expect(page.locator(".account-meta").first()).toContainText("t**t@e*****e.com");
+  await expect(page.locator("body")).not.toContainText("test@example.com");
+});