diff --git a/PROGRESS-frontend-optimization-20260828.md b/PROGRESS-frontend-optimization-20260828.md
index c1cabf33..1ea0cb02 100644
--- a/PROGRESS-frontend-optimization-20260828.md
+++ b/PROGRESS-frontend-optimization-20260828.md
@@ -142,7 +142,7 @@
 
 基线 **2196** → 本轮 **2205 pass / 0 fail / 0 skipped**（+9：chart-library-session 5、home-streaming-render-split 1、site-style-isolation 2、account-dialog-overlay 1）。
 
-浏览器（`next start` PORT 3010，无后端）：`/login` 可见压缩 logo 与 Inter 变量 class、Link 头 `woff2` preload；`/membership` 站点样式完整；`/admin/users` 仍 403。未登录 `/` 因本机 Supabase 未配置走恢复页，不是本轮回归。后台已登录四页目视仍见 `BLOCKED.md`。
+浏览器（`next start` PORT 3010，未注入 `AUTH_PROVIDER=self-hosted` 与本地 PostgreSQL URL）：`/login` 可见压缩 logo 与 Inter 变量 class、Link 头 `woff2` preload；`/membership` 站点样式完整；`/admin/users` 仍 403。未登录 `/` 因本机没有业务库连接而走恢复页，不是本轮回归。运行时是 Better Auth + 自维护 PostgreSQL，不是 Supabase。后台已登录四页目视仍见 `BLOCKED.md`。
 
 ## 验收命令（本机）
 
diff --git a/docs/BUG_HISTORY.md b/docs/BUG_HISTORY.md
index 2c13e7ef..b72634cc 100644
--- a/docs/BUG_HISTORY.md
+++ b/docs/BUG_HISTORY.md
@@ -6589,3 +6589,19 @@
 - 复发自：无
 - 修复版本：待发布
 
+## BUG-431 | 自托管 PostgreSQL 缺库时仍对用户写“Supabase 尚未配置”
+
+- 状态：resolved
+- 首次发现：2026-08-29
+- 最近更新：2026-08-29
+- 影响面：`GET /api/account`、会员余额、登录失败提示、会话/报告/星盘库等 503
+- 用户现象：运行时已是 Better Auth + 本地 PostgreSQL，缺业务库 URL 或未设 `AUTH_PROVIDER=self-hosted` 时，会员页“当前余额”和首页仍显示“Supabase 尚未配置”。
+- 触发条件：未注入 `APP_DATABASE_URL` / `SERVICE_DATABASE_URL`，或 `AUTH_PROVIDER` 未设为 `self-hosted` 因而落到旧适配器路径。
+- 根因：BUG-010 已禁止浏览器直连 Supabase，但 API 与 `friendlyError` 仍把配置失败翻译成 Supabase 文案和 `SUPABASE_NOT_CONFIGURED`。产品已不用 Supabase。
+- 修复：对外统一为“数据库尚未配置” / `DATABASE_NOT_CONFIGURED`，以及“请先配置数据库环境变量。”。内部类名仍叫 `SupabaseConfigurationError`，避免本轮改适配器标识。
+- 验证：`frontend/tests/self-hosted-error-copy.test.ts` 扫描 `frontend/src` 禁止上述旧文案，并锁定错误码与内部消息。
+- 防复发：用户可见中文不得再出现“Supabase 尚未配置”；缺库 503 必须说数据库，不得说已退役的托管服务。
+- 相关记录：BUG-010
+- 复发自：BUG-010
+- 修复版本：待发布
+
diff --git a/frontend/src/app/api/account/route.ts b/frontend/src/app/api/account/route.ts
index 48915dd9..92886e9d 100644
--- a/frontend/src/app/api/account/route.ts
+++ b/frontend/src/app/api/account/route.ts
@@ -161,7 +161,7 @@ export async function GET() {
     });
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: "账户服务暂时不可用" }, { status: 500 });
   }
@@ -346,7 +346,7 @@ export async function PATCH(request: Request) {
     });
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: "账户服务暂时不可用" }, { status: 500 });
   }
diff --git a/frontend/src/app/api/birth-time-guide/route.ts b/frontend/src/app/api/birth-time-guide/route.ts
index d0ba805d..de46cba0 100644
--- a/frontend/src/app/api/birth-time-guide/route.ts
+++ b/frontend/src/app/api/birth-time-guide/route.ts
@@ -42,7 +42,7 @@ export async function POST(request: Request) {
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
       return NextResponse.json(
-        { error: "服务尚未配置", message: "请先配置 Supabase 环境变量。" },
+        { error: "服务尚未配置", message: "请先配置数据库环境变量。" },
         { status: 503 },
       );
     }
diff --git a/frontend/src/app/api/birth-time-journey/route.ts b/frontend/src/app/api/birth-time-journey/route.ts
index 21fd4b78..1f1ba2c6 100644
--- a/frontend/src/app/api/birth-time-journey/route.ts
+++ b/frontend/src/app/api/birth-time-journey/route.ts
@@ -63,7 +63,7 @@ export async function POST(request: Request) {
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
       return NextResponse.json(
-        { error: "服务尚未配置", message: "请先配置 Supabase 环境变量。" },
+        { error: "服务尚未配置", message: "请先配置数据库环境变量。" },
         { status: 503 },
       );
     }
diff --git a/frontend/src/app/api/chart-profiles/[id]/route.ts b/frontend/src/app/api/chart-profiles/[id]/route.ts
index 2acce5c1..82f050b8 100644
--- a/frontend/src/app/api/chart-profiles/[id]/route.ts
+++ b/frontend/src/app/api/chart-profiles/[id]/route.ts
@@ -31,7 +31,7 @@ export async function DELETE(_request: Request, context: RouteContext) {
     return NextResponse.json({ ok: true });
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: errorMessage(error, "星盘删除失败") }, { status: 500 });
   }
diff --git a/frontend/src/app/api/chart-profiles/route.ts b/frontend/src/app/api/chart-profiles/route.ts
index a9f37060..f190866e 100644
--- a/frontend/src/app/api/chart-profiles/route.ts
+++ b/frontend/src/app/api/chart-profiles/route.ts
@@ -28,7 +28,7 @@ export async function GET() {
     return NextResponse.json({ profiles: data ?? [] });
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: errorMessage(error, "星盘库暂时不可用") }, { status: 500 });
   }
@@ -81,7 +81,7 @@ export async function POST(request: Request) {
     return NextResponse.json({ profile: data });
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: errorMessage(error, "星盘保存失败") }, { status: 500 });
   }
diff --git a/frontend/src/app/api/consult/cancel/route.ts b/frontend/src/app/api/consult/cancel/route.ts
index b64138ae..32ca9669 100644
--- a/frontend/src/app/api/consult/cancel/route.ts
+++ b/frontend/src/app/api/consult/cancel/route.ts
@@ -18,7 +18,7 @@ export async function POST(request: Request) {
     accounting = createAdminSupabaseClient();
   } catch {
     return NextResponse.json(
-      { error: "服务尚未配置", message: "请先配置 Supabase 环境变量。" },
+      { error: "服务尚未配置", message: "请先配置数据库环境变量。" },
       { status: 503 },
     );
   }
diff --git a/frontend/src/app/api/consult/route.ts b/frontend/src/app/api/consult/route.ts
index 7b59819e..8ecc358f 100644
--- a/frontend/src/app/api/consult/route.ts
+++ b/frontend/src/app/api/consult/route.ts
@@ -234,7 +234,7 @@ export async function POST(request: Request) {
     accounting = createAdminSupabaseClient();
   } catch {
     return NextResponse.json(
-      { error: "服务尚未配置", message: "请先配置 Supabase 环境变量。" },
+      { error: "服务尚未配置", message: "请先配置数据库环境变量。" },
       { status: 503 },
     );
   }
diff --git a/frontend/src/app/api/models/route.ts b/frontend/src/app/api/models/route.ts
index 7aeb65af..d7a83817 100644
--- a/frontend/src/app/api/models/route.ts
+++ b/frontend/src/app/api/models/route.ts
@@ -11,7 +11,7 @@ export async function GET() {
   } catch (error) {
     if (error instanceof Error) {
       return NextResponse.json(
-        { error: "服务尚未配置", message: "请先配置 Supabase 环境变量。" },
+        { error: "服务尚未配置", message: "请先配置数据库环境变量。" },
         { status: 503 },
       );
     }
diff --git a/frontend/src/app/api/payment/orders/route.ts b/frontend/src/app/api/payment/orders/route.ts
index 204b7843..7a002003 100644
--- a/frontend/src/app/api/payment/orders/route.ts
+++ b/frontend/src/app/api/payment/orders/route.ts
@@ -42,7 +42,7 @@ export async function GET() {
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
       return NextResponse.json(
-        { error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" },
+        { error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" },
         { status: 503 },
       );
     }
diff --git a/frontend/src/app/api/redeem/route.ts b/frontend/src/app/api/redeem/route.ts
index 1be0d1eb..2fe41915 100644
--- a/frontend/src/app/api/redeem/route.ts
+++ b/frontend/src/app/api/redeem/route.ts
@@ -75,7 +75,7 @@ export async function POST(request: Request) {
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
       return NextResponse.json(
-        { error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" },
+        { error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" },
         { status: 503 },
       );
     }
diff --git a/frontend/src/app/api/reports/[reportId]/route.ts b/frontend/src/app/api/reports/[reportId]/route.ts
index 08af4663..60b3f560 100644
--- a/frontend/src/app/api/reports/[reportId]/route.ts
+++ b/frontend/src/app/api/reports/[reportId]/route.ts
@@ -80,7 +80,7 @@ export async function GET(request: Request, context: RouteContext) {
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
       return NextResponse.json(
-        { error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" },
+        { error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" },
         { status: 503 },
       );
     }
@@ -122,7 +122,7 @@ export async function DELETE(request: Request, context: RouteContext) {
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
       return NextResponse.json(
-        { error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" },
+        { error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" },
         { status: 503 },
       );
     }
diff --git a/frontend/src/app/api/reports/route.ts b/frontend/src/app/api/reports/route.ts
index e7ea8447..b6a4db04 100644
--- a/frontend/src/app/api/reports/route.ts
+++ b/frontend/src/app/api/reports/route.ts
@@ -93,7 +93,7 @@ export async function GET() {
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
       return NextResponse.json(
-        { error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" },
+        { error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" },
         { status: 503 },
       );
     }
@@ -211,7 +211,7 @@ export async function POST(request: Request) {
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
       return NextResponse.json(
-        { error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" },
+        { error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" },
         { status: 503 },
       );
     }
diff --git a/frontend/src/app/api/sessions/[id]/route.ts b/frontend/src/app/api/sessions/[id]/route.ts
index 771085cb..813a158a 100644
--- a/frontend/src/app/api/sessions/[id]/route.ts
+++ b/frontend/src/app/api/sessions/[id]/route.ts
@@ -51,7 +51,7 @@ export async function PATCH(request: Request, context: RouteContext) {
       return NextResponse.json({ error: error.message }, { status: 413 });
     }
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: "聊天记录暂时无法同步" }, { status: 500 });
   }
@@ -74,7 +74,7 @@ export async function DELETE(_request: Request, context: RouteContext) {
     return NextResponse.json({ ok: true });
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: error instanceof Error ? error.message : "删除聊天记录失败" }, { status: 500 });
   }
diff --git a/frontend/src/app/api/sessions/route.ts b/frontend/src/app/api/sessions/route.ts
index 00cc62f7..ce6fe523 100644
--- a/frontend/src/app/api/sessions/route.ts
+++ b/frontend/src/app/api/sessions/route.ts
@@ -52,7 +52,7 @@ export async function POST(request: Request) {
       return NextResponse.json({ error: error.message }, { status: 413 });
     }
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: "聊天记录暂时无法同步" }, { status: 500 });
   }
diff --git a/frontend/src/app/api/synastry-reports/route.ts b/frontend/src/app/api/synastry-reports/route.ts
index 3ebcc869..bf13c7cd 100644
--- a/frontend/src/app/api/synastry-reports/route.ts
+++ b/frontend/src/app/api/synastry-reports/route.ts
@@ -36,7 +36,7 @@ export async function GET() {
     return NextResponse.json({ reports: data ?? [] });
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: errorMessage(error, "合盘历史暂时不可用") }, { status: 500 });
   }
@@ -78,7 +78,7 @@ export async function POST(request: Request) {
     return NextResponse.json({ report: data });
   } catch (error) {
     if (isSupabaseConfigurationError(error)) {
-      return NextResponse.json({ error: "Supabase 尚未配置", code: "SUPABASE_NOT_CONFIGURED" }, { status: 503 });
+      return NextResponse.json({ error: "数据库尚未配置", code: "DATABASE_NOT_CONFIGURED" }, { status: 503 });
     }
     return NextResponse.json({ error: errorMessage(error, "合盘历史保存失败") }, { status: 500 });
   }
diff --git a/frontend/src/app/page.tsx b/frontend/src/app/page.tsx
index 1647bc2d..83807c6f 100644
--- a/frontend/src/app/page.tsx
+++ b/frontend/src/app/page.tsx
@@ -944,8 +944,11 @@ function isProfileComplete(profile: Profile) {
 }
 
 function friendlyError(message: string) {
-  return message.includes("Supabase") && (message.includes("配置") || message.includes("environment") || message.includes("URL"))
-    ? "Supabase 尚未配置"
+  return (
+    message.includes("数据库配置缺失")
+    || (message.includes("Supabase") && (message.includes("配置") || message.includes("environment") || message.includes("URL")))
+  )
+    ? "数据库尚未配置"
     : message;
 }
 
diff --git a/frontend/src/components/email-otp-login.tsx b/frontend/src/components/email-otp-login.tsx
index 184c9a63..7d9c1e7f 100644
--- a/frontend/src/components/email-otp-login.tsx
+++ b/frontend/src/components/email-otp-login.tsx
@@ -19,7 +19,7 @@ function authMessage(caught: unknown) {
     message.includes("environment") ||
     message.includes("URL")
   )
-    return "Supabase 尚未配置";
+    return "数据库尚未配置";
   if (lower.includes("expired") || lower.includes("invalid"))
     return "验证码错误或已过期，请重新获取";
   if (lower.includes("rate limit")) return "发送过于频繁，请稍后再试";
diff --git a/frontend/src/lib/onboarding-post.ts b/frontend/src/lib/onboarding-post.ts
index 4877afcc..5b9cf77d 100644
--- a/frontend/src/lib/onboarding-post.ts
+++ b/frontend/src/lib/onboarding-post.ts
@@ -148,7 +148,7 @@ export function createOnboardingPost(dependencies: OnboardingPostDependencies):
       session = await dependencies.openSession();
     } catch { // no-excuse-ok: catch -- route boundary converts missing configuration.
       return Response.json(
-        { error: "服务尚未配置", message: "请先配置 Supabase 环境变量。" },
+        { error: "服务尚未配置", message: "请先配置数据库环境变量。" },
         { status: 503 },
       );
     }
diff --git a/frontend/src/lib/supabase/config.ts b/frontend/src/lib/supabase/config.ts
index 36a023ea..a237b461 100644
--- a/frontend/src/lib/supabase/config.ts
+++ b/frontend/src/lib/supabase/config.ts
@@ -1,8 +1,8 @@
 export class SupabaseConfigurationError extends Error {
-  readonly code = "SUPABASE_NOT_CONFIGURED";
+  readonly code = "DATABASE_NOT_CONFIGURED";
 
   constructor(missing: string[]) {
-    super(`Supabase 配置缺失：${missing.join(", ")}`);
+    super(`数据库配置缺失：${missing.join(", ")}`);
     this.name = "SupabaseConfigurationError";
   }
 }
diff --git a/frontend/tests/self-hosted-error-copy.test.ts b/frontend/tests/self-hosted-error-copy.test.ts
new file mode 100644
index 00000000..de4c425d
--- /dev/null
+++ b/frontend/tests/self-hosted-error-copy.test.ts
@@ -0,0 +1,43 @@
+import assert from "node:assert/strict";
+import { readdirSync, readFileSync, statSync } from "node:fs";
+import { join } from "node:path";
+import { fileURLToPath } from "node:url";
+import test from "node:test";
+import { SupabaseConfigurationError } from "../src/lib/supabase/config.ts";
+
+const srcRoot = fileURLToPath(new URL("../src", import.meta.url));
+
+function walk(directory: string): string[] {
+  const entries = readdirSync(directory);
+  const files: string[] = [];
+  for (const name of entries) {
+    const path = join(directory, name);
+    if (statSync(path).isDirectory()) {
+      files.push(...walk(path));
+      continue;
+    }
+    if (path.endsWith(".ts") || path.endsWith(".tsx")) files.push(path);
+  }
+  return files;
+}
+
+test("user-visible copy never names Supabase after the PostgreSQL cutover", () => {
+  const stale = [
+    "Supabase 尚未配置",
+    "请先配置 Supabase 环境变量。",
+    "Supabase 配置缺失",
+    "SUPABASE_NOT_CONFIGURED",
+  ];
+  const hits: string[] = [];
+  for (const file of walk(srcRoot)) {
+    const source = readFileSync(file, "utf8");
+    for (const needle of stale) {
+      if (source.includes(needle)) hits.push(`${file.slice(srcRoot.length + 1)}: ${needle}`);
+    }
+  }
+  assert.deepEqual(hits, []);
+  const missing = new SupabaseConfigurationError(["APP_DATABASE_URL"]);
+  assert.equal(missing.code, "DATABASE_NOT_CONFIGURED");
+  assert.match(missing.message, /数据库配置缺失：APP_DATABASE_URL/);
+  assert.doesNotMatch(missing.message, /Supabase/);
+});