diff --git a/apps/server/src/app.ts b/apps/server/src/app.ts
index 819a299..bfe9b10 100644
--- a/apps/server/src/app.ts
+++ b/apps/server/src/app.ts
@@ -40,8 +40,11 @@ export function createApp(opts: CreateAppOptions) {
 
   app.use("*", async (c, next) => {
     const start = Date.now();
-    await next();
-    appLogger("http").info`${c.req.method} ${c.req.path} → ${c.res.status} · ${Date.now() - start}ms`;
+    try {
+      await next();
+    } finally {
+      appLogger("http").info`${c.req.method} ${c.req.path} → ${c.res.status} · ${Date.now() - start}ms`;
+    }
   });
   app.use("*", async (c, next) => {
     c.set("repos", repos);
diff --git a/apps/server/src/routes/admin-keys.ts b/apps/server/src/routes/admin-keys.ts
index daf64bb..ef53a80 100644
--- a/apps/server/src/routes/admin-keys.ts
+++ b/apps/server/src/routes/admin-keys.ts
@@ -133,10 +133,18 @@ export function adminKeyRoutes() {
       if (guard) return guard;
       const body = await c.req.json().catch(() => null);
       const sk_key = typeof body?.sk_key === "string" ? body.sk_key.trim() : "";
-      const member_id =
-        body?.member_id === undefined || body?.member_id === null
-          ? null
-          : Number(body.member_id);
+      let member_id: number | null = null;
+      if (body?.member_id !== undefined && body?.member_id !== null) {
+        const n = Number(body.member_id);
+        if (!Number.isInteger(n) || n <= 0) {
+          return jsonError(
+            c,
+            422,
+            ERR.validation_failed({ member_id: "成员 id 无效" }),
+          );
+        }
+        member_id = n;
+      }
       if (!sk_key || !sk_key.startsWith("sk-")) {
         return jsonError(
           c,
@@ -276,8 +284,18 @@ export function adminKeyRoutes() {
         }
       }
       if (body && "member_id" in body) {
-        const nextMember =
-          body.member_id == null ? null : Number(body.member_id);
+        let nextMember: number | null = null;
+        if (body.member_id != null) {
+          const n = Number(body.member_id);
+          if (!Number.isInteger(n) || n <= 0) {
+            return jsonError(
+              c,
+              422,
+              ERR.validation_failed({ member_id: "成员 id 无效" }),
+            );
+          }
+          nextMember = n;
+        }
         if (nextMember !== before.member_id) {
           patch.member_id = nextMember;
           actions.push({
diff --git a/apps/server/src/routes/admin-session.ts b/apps/server/src/routes/admin-session.ts
index ec80a91..892a15f 100644
--- a/apps/server/src/routes/admin-session.ts
+++ b/apps/server/src/routes/admin-session.ts
@@ -74,14 +74,18 @@ export function adminSessionRoutes() {
       const initUser = c.get("adminInitUsername");
       const initPass = c.get("adminInitPassword");
       if (initUser && initPass) {
-        const password_hash = await hashPassword(initPass);
-        await repos.users.insert(initUser, password_hash);
-        await repos.audit.insert({
-          operator: null,
-          domain: "account",
-          action: "account.init",
-          summary: "空库 env 静默重建管理员",
-        });
+        try {
+          const password_hash = await hashPassword(initPass);
+          await repos.users.insert(initUser, password_hash);
+          await repos.audit.insert({
+            operator: null,
+            domain: "account",
+            action: "account.init",
+            summary: "空库 env 静默重建管理员",
+          });
+        } catch {
+          // 并发/重复初始化：唯一约束冲突时视为已初始化
+        }
         return c.json({ initialized: true }, 200);
       }
       return c.json({ initialized: false }, 200);
diff --git a/apps/server/src/routes/admin-usage.ts b/apps/server/src/routes/admin-usage.ts
index 2c6ab23..a31890a 100644
--- a/apps/server/src/routes/admin-usage.ts
+++ b/apps/server/src/routes/admin-usage.ts
@@ -15,7 +15,6 @@ import {
   err401,
   err422,
   logPageSchema,
-  keyItemSchema,
 } from "../api-schemas.ts";
 import { z } from "zod";