diff --git a/docs/BUG_HISTORY.md b/docs/BUG_HISTORY.md
index 329fcca0..31188ccf 100644
--- a/docs/BUG_HISTORY.md
+++ b/docs/BUG_HISTORY.md
@@ -1578,3 +1578,19 @@
 - 防复发：当前事件延续必须是服务端 opportunity 所有权规则，而不是 prompt 建议；模型输出即使结构合法，也必须经过 bounded tool budget、active-opportunity lookup、decision validation 和 completion payload hash 四层门控。
 - 相关记录：BUG-075、BUG-085
 - 修复版本：本地 V5 重构，待提交与 staging 验收
+
+## BUG-087 | self-hosted staging 管理员看不到独立后台入口
+
+- 状态：resolved
+- 首次发现：2026-07-29
+- 最近更新：2026-07-29
+- 影响面：self-hosted staging 账户菜单、`GET /api/account`、独立后台入口；不影响后台独立登录与 `requireAdminSession`
+- 用户现象：身份库已持久化 `admin` 或 `viewer` 角色的用户登录主站后，账户菜单不显示后台入口；即使显示旧入口，主站 `/admin` 路径也会返回 404。
+- 触发条件：`AUTH_PROVIDER=self-hosted`，后台部署在与主站不同的 `AUTH_ADMIN_ORIGIN`，用户角色以逗号分隔形式持久化在 `identity.users.role`。
+- 根因：主站 `isAdminUser` 对 self-hosted 模式直接返回 `false`，没有读取持久化角色；侧栏又把入口写死为主站相对路径 `/admin/codes`。既有后台鉴权已按持久化角色执行，但主站入口发现逻辑没有复用同一授权事实，独立域名部署合同也没有进入账户响应。
+- 修复：self-hosted 分支通过现有 `ADMIN_DATABASE_URL` 管理只读连接查询当前用户的 `identity.users.role`，仅 `admin` 或 `viewer` 可见入口，且不使用 `ADMIN_EMAILS` 替代角色授权；`GET /api/account` 在服务端解析身份配置并返回 `AUTH_ADMIN_ORIGIN + /admin/codes`，Supabase 模式继续返回 `/admin/codes`；账户与侧栏类型透传该 URL，并将文案改为“后台管理”。后台独立登录和 `requireAdminSession` 保持不变。
+- 验证：`frontend/tests/admin-contracts.test.ts`、`frontend/tests/admin-users-contract.test.ts`、`frontend/tests/account-api.test.ts`、`frontend/tests/sidebar-contract.test.ts` 锁定持久化角色、独立后台 URL、服务端环境边界和后台写权限门禁；目标 TypeScript、构建与 staging 登录态 smoke 结果另行记录。
+- 防复发：self-hosted 主站入口发现必须以 `identity.users.role` 为授权事实，不能退回邮箱 allowlist；客户端不得读取后台 origin 环境变量或硬编码主站 `/admin` 路径；后台 API 必须继续独立执行 `requireAdminSession`，入口可见性不得被当作授权。
+- 相关记录：BUG-010、BUG-083、BUG-084
+- 复发自：BUG-010
+- 修复版本：待提交（本地可测）
diff --git a/frontend/src/app/api/account/route.ts b/frontend/src/app/api/account/route.ts
index e151abcf..d3b594ee 100644
--- a/frontend/src/app/api/account/route.ts
+++ b/frontend/src/app/api/account/route.ts
@@ -13,6 +13,7 @@ import {
   isSupabaseConfigurationError,
 } from "@/lib/supabase/config";
 import { createServerSupabaseClient } from "@/lib/supabase/server";
+import { readIdentityConfig } from "@/modules/identity/config";
 
 export const runtime = "nodejs";
 
@@ -109,11 +110,19 @@ export async function GET() {
       profile,
       Array.isArray(rectificationCaseRows) ? rectificationCaseRows : [],
     );
+    const isAdmin = await isAdminUser(user);
+    const identityConfig = readIdentityConfig(process.env);
+    const adminUrl = isAdmin
+      ? identityConfig.provider === "self-hosted"
+        ? new URL("/admin/codes", identityConfig.adminOrigin).toString()
+        : "/admin/codes"
+      : null;
 
     return NextResponse.json({
       user: { id: user.id, email: user.email ?? null },
       credits: profile.credits,
-      isAdmin: await isAdminUser(user),
+      isAdmin,
+      adminUrl,
       rectificationPriceCredits,
       hasConfirmedBirthTime: profile.birth_time_status === "confirmed"
         && typeof profile.active_birth_time === "string",
diff --git a/frontend/src/app/page.tsx b/frontend/src/app/page.tsx
index 4b6fdac9..3ce7621f 100644
--- a/frontend/src/app/page.tsx
+++ b/frontend/src/app/page.tsx
@@ -180,6 +180,7 @@ type Account = {
   user: { id: string; email: string | null };
   credits: number;
   isAdmin: boolean;
+  adminUrl: string | null;
   rectificationPriceCredits: number;
   hasConfirmedBirthTime: boolean;
   rectificationCase: AccountRectificationCaseState | null;
@@ -1243,6 +1244,7 @@ export default function Home() {
             user: { id: "preview-user", email: "preview@local.test" },
             credits: 8,
             isAdmin: false,
+            adminUrl: null,
             rectificationPriceCredits: 1,
             hasConfirmedBirthTime: previewProfile.birthTimeStatus === "confirmed",
             rectificationCase: null,
@@ -2789,6 +2791,7 @@ export default function Home() {
     email: account.user.email || "尚未读取邮箱",
     credits: account.credits,
     isAdmin: account.isAdmin,
+    adminUrl: account.adminUrl,
     initial: profile.name.trim().slice(0, 1)
       || account.user.email?.slice(0, 1).toUpperCase()
       || "你",
diff --git a/frontend/src/components/app-sidebar.tsx b/frontend/src/components/app-sidebar.tsx
index 6a4a2516..974f3d8b 100644
--- a/frontend/src/components/app-sidebar.tsx
+++ b/frontend/src/components/app-sidebar.tsx
@@ -38,6 +38,7 @@ export type SidebarAccount = {
   email: string;
   credits: number;
   isAdmin: boolean;
+  adminUrl: string | null;
   initial: string;
 };
 
@@ -214,8 +215,8 @@ export function AppSidebar({
                 <button className="account-menu-item" role="menuitem" type="button" onClick={() => handleAccountAction(onOpenRedeem)}>
                   <Gift aria-hidden="true" /><span>兑换点数</span><small>{account.credits} 点</small>
                 </button>
-                {account.isAdmin && <Link className="account-menu-item" href="/admin/codes" role="menuitem" onClick={() => onAccountMenuOpenChange(false)}>
-                  <KeyRound aria-hidden="true" /><span>管理兑换码</span><ChevronRight aria-hidden="true" />
+                {account.isAdmin && account.adminUrl && <Link className="account-menu-item" href={account.adminUrl} role="menuitem" onClick={() => onAccountMenuOpenChange(false)}>
+                  <KeyRound aria-hidden="true" /><span>后台管理</span><ChevronRight aria-hidden="true" />
                 </Link>}
                 <div className="account-menu-separator" role="separator" />
                 <button className="account-menu-item account-menu-danger" role="menuitem" type="button" onClick={() => handleAccountAction(onOpenLogout)}>
diff --git a/frontend/src/lib/supabase/admin.ts b/frontend/src/lib/supabase/admin.ts
index 24ca7d26..8286a0dc 100644
--- a/frontend/src/lib/supabase/admin.ts
+++ b/frontend/src/lib/supabase/admin.ts
@@ -1,5 +1,6 @@
 import "server-only";
 
+import { queryAdminRows } from "@/lib/admin/database";
 import {
   createAdminSupabaseClient,
   isAdminEmail,
@@ -8,8 +9,23 @@ import {
 export { createAdminSupabaseClient, isAdminEmail };
 
 export async function isAdminUser(user: { id?: string; email?: string | null }) {
+  if (process.env.AUTH_PROVIDER?.trim() === "self-hosted") {
+    if (!user.id) return false;
+    try {
+      const rows = await queryAdminRows<{ role: string }>(
+        "select role from identity.users where id = $1 limit 1",
+        [user.id],
+      );
+      return rows[0]?.role
+        .split(",")
+        .map((role) => role.trim())
+        .some((role) => role === "admin" || role === "viewer") ?? false;
+    } catch {
+      return false;
+    }
+  }
   if (isAdminEmail(user.email)) return true;
-  if (process.env.AUTH_PROVIDER?.trim() === "self-hosted" || !user.id) return false;
+  if (!user.id) return false;
 
   try {
     const admin = createAdminSupabaseClient();
diff --git a/frontend/tests/account-api.test.ts b/frontend/tests/account-api.test.ts
index 29fe15e1..8138b1e9 100644
--- a/frontend/tests/account-api.test.ts
+++ b/frontend/tests/account-api.test.ts
@@ -27,6 +27,15 @@ test("account API reads and returns the server-configured rectification price",
   assert.doesNotMatch(source, /RECTIFICATION_PRICE_CREDITS[^\n]*\?\?\s*["']1["']/);
 });
 
+test("account API returns a server-resolved admin entry URL", () => {
+  assert.match(source, /readIdentityConfig\(process\.env\)/);
+  assert.match(source, /new URL\("\/admin\/codes", identityConfig\.adminOrigin\)\.toString\(\)/);
+  assert.match(source, /identityConfig\.provider === "self-hosted"/);
+  assert.match(source, /: "\/admin\/codes"/);
+  assert.match(source, /adminUrl,/);
+  assert.doesNotMatch(source, /NEXT_PUBLIC_ADMIN|process\.env\.AUTH_ADMIN_ORIGIN/);
+});
+
 test("account API projects only the minimum case state needed by the homepage", () => {
   const caseSelect = source.match(/\.from\("birth_time_rectification_cases"\)[\s\S]*?\.limit\(\d+\)/)?.[0] ?? "";
 
diff --git a/frontend/tests/admin-contracts.test.ts b/frontend/tests/admin-contracts.test.ts
index 58fa8f2c..8ac911bc 100644
--- a/frontend/tests/admin-contracts.test.ts
+++ b/frontend/tests/admin-contracts.test.ts
@@ -8,6 +8,7 @@ const migration = readFileSync(
 );
 const auth = readFileSync(new URL("../src/lib/admin/auth.ts", import.meta.url), "utf8");
 const authPolicy = readFileSync(new URL("../src/lib/admin/auth-policy.ts", import.meta.url), "utf8");
+const adminUser = readFileSync(new URL("../src/lib/supabase/admin.ts", import.meta.url), "utf8");
 const codesRoute = readFileSync(new URL("../src/app/api/admin/codes/route.ts", import.meta.url), "utf8");
 const codeRoute = readFileSync(new URL("../src/app/api/admin/codes/[id]/route.ts", import.meta.url), "utf8");
 const providers = readFileSync(new URL("../src/lib/admin/providers.ts", import.meta.url), "utf8");
@@ -27,6 +28,20 @@ test("admin APIs use persisted Better Auth roles with admin and viewer boundarie
   assert.match(codeRoute, /requireAdminSession\("write"\)/g);
 });
 
+test("self-hosted account entry checks persisted admin or viewer roles", () => {
+  const selfHostedBranch = adminUser.slice(
+    adminUser.indexOf('process.env.AUTH_PROVIDER?.trim() === "self-hosted"'),
+    adminUser.indexOf("if (isAdminEmail"),
+  );
+
+  assert.match(selfHostedBranch, /queryAdminRows/);
+  assert.match(selfHostedBranch, /select role from identity\.users where id = \$1 limit 1/);
+  assert.match(selfHostedBranch, /role === "admin" \|\| role === "viewer"/);
+  assert.doesNotMatch(selfHostedBranch, /isAdminEmail|ADMIN_EMAILS/);
+  assert.match(auth, /getIdentityAuthServices\(\)\.admin\.api/);
+  assert.match(auth, /authorizeAdminAccess\(user, access\)/);
+});
+
 test("readonly resources cannot be mutated through Refine access control", () => {
   for (const resource of ["users", "credit-transactions", "consultations", "audit-logs"]) {
     assert.match(providers, new RegExp(`"${resource}"`));
diff --git a/frontend/tests/admin-users-contract.test.ts b/frontend/tests/admin-users-contract.test.ts
index a3ef3f1c..2ee5df6a 100644
--- a/frontend/tests/admin-users-contract.test.ts
+++ b/frontend/tests/admin-users-contract.test.ts
@@ -4,25 +4,27 @@ import test from "node:test";
 
 const root = new URL("../", import.meta.url);
 const adminSource = readFileSync(new URL("src/lib/supabase/admin.ts", root), "utf8");
-const layoutSource = readFileSync(new URL("src/app/admin/layout.tsx", root), "utf8");
+const adminCoreSource = readFileSync(new URL("src/lib/supabase/admin-client-core.ts", root), "utf8");
 const codesSource = readFileSync(new URL("src/app/api/admin/codes/route.ts", root), "utf8");
+const sessionSource = readFileSync(new URL("src/app/api/admin/session/route.ts", root), "utf8");
 const accountSource = readFileSync(new URL("src/app/api/account/route.ts", root), "utf8");
 const usersSource = readFileSync(new URL("src/app/api/admin/users/route.ts", root), "utf8");
 const migration = readFileSync(new URL("supabase/migrations/20260727010000_admin_users.sql", root), "utf8");
 
 test("ADMIN_EMAILS remains a case-insensitive comma-separated allowlist", () => {
-  assert.match(adminSource, /configured/);
-  assert.match(adminSource, /split\(\",\"\)/);
-  assert.match(adminSource, /toLowerCase/);
-  assert.match(adminSource, /export function isAdminEmail/);
+  assert.match(adminCoreSource, /configured/);
+  assert.match(adminCoreSource, /split\(","\)/);
+  assert.match(adminCoreSource, /toLowerCase/);
+  assert.match(adminCoreSource, /export function isAdminEmail/);
 });
 
 test("admin surfaces await database-backed administrator checks", () => {
   assert.match(adminSource, /export async function isAdminUser/);
   assert.match(adminSource, /from\("admin_users"\)/);
-  assert.match(layoutSource, /await isAdminUser\(user\)/);
-  assert.match(codesSource, /await isAdminUser\(user\)/);
-  assert.match(accountSource, /isAdmin: await isAdminUser\(user\)/);
+  assert.match(sessionSource, /await requireAdminSession\(\)/);
+  assert.match(codesSource, /await requireAdminSession\("write"\)/);
+  assert.match(accountSource, /const isAdmin = await isAdminUser\(user\)/);
+  assert.match(accountSource, /isAdmin,/);
 });
 
 test("admin_users migration is service-role-only and auditable", () => {
@@ -36,12 +38,10 @@ test("admin_users migration is service-role-only and auditable", () => {
   assert.match(migration, /grant select, insert, update on table public\.admin_users to service_role/);
 });
 
-test("admin users route exposes guarded list, add, and soft revoke contracts", () => {
+test("admin users route exposes a guarded list and rejects mutations", () => {
   assert.match(usersSource, /export async function GET/);
-  assert.match(usersSource, /export async function POST/);
-  assert.match(usersSource, /export async function DELETE/);
-  assert.match(usersSource, /auth\.admin\.listUsers/);
-  assert.match(usersSource, /upsert\(\{ user_id: target\.id, created_by: auth\.user\.id/);
-  assert.match(usersSource, /revoked_at: new Date\(\)\.toISOString\(\)/);
-  assert.match(usersSource, /环境配置管理员不可撤销/);
+  assert.match(usersSource, /await requireAdminSession\(\)/);
+  assert.match(usersSource, /export const POST = readonlyAdminMutation/);
+  assert.match(usersSource, /export const PATCH = readonlyAdminMutation/);
+  assert.match(usersSource, /export const DELETE = readonlyAdminMutation/);
 });
diff --git a/frontend/tests/sidebar-contract.test.ts b/frontend/tests/sidebar-contract.test.ts
index d6f2d56f..22eccb16 100644
--- a/frontend/tests/sidebar-contract.test.ts
+++ b/frontend/tests/sidebar-contract.test.ts
@@ -154,6 +154,18 @@ test("keeps app sidebar props as product data and callbacks", () => {
   assert.doesNotMatch(appSidebar, /supabase|fetch\(|\/api\//i);
 });
 
+test("uses the server-provided independent admin entry URL", () => {
+  const appSidebar = readProjectFile("src/components/app-sidebar.tsx");
+  const page = readProjectFile("src/app/page.tsx");
+
+  assert.match(appSidebar, /adminUrl: string \| null/);
+  assert.match(appSidebar, /account\.isAdmin && account\.adminUrl/);
+  assert.match(appSidebar, /href=\{account\.adminUrl\}/);
+  assert.match(appSidebar, />后台管理</);
+  assert.doesNotMatch(appSidebar, /href="\/admin\/codes"/);
+  assert.match(page, /adminUrl: account\.adminUrl/);
+});
+
 test("composes the chat page with the app sidebar shell", () => {
   const page = readProjectFile("src/app/page.tsx");