diff --git a/backend/src/main/java/com/imeeting/controller/RoleController.java b/backend/src/main/java/com/imeeting/controller/RoleController.java
index 5a6e57a..66b6231 100644
--- a/backend/src/main/java/com/imeeting/controller/RoleController.java
+++ b/backend/src/main/java/com/imeeting/controller/RoleController.java
@@ -101,6 +101,18 @@ public class RoleController {
     
     // 权限越权校验
     Long currentTenantId = getCurrentTenantId();
+    SysRole targetRole = sysRoleService.getById(id);
+    if (targetRole == null) {
+        return ApiResponse.error("角色不存在");
+    }
+
+    // 关键校验：只有平台管理员可以修改 TENANT_ADMIN 角色的权限
+    if ("TENANT_ADMIN".equalsIgnoreCase(targetRole.getRoleCode())) {
+        if (!Long.valueOf(0).equals(currentTenantId)) {
+            return ApiResponse.error("租户管理员角色的权限只能由平台管理员修改");
+        }
+    }
+
     if (!Long.valueOf(0).equals(currentTenantId)) {
         List<com.imeeting.entity.SysPermission> myPerms = sysPermissionService.listByUserId(getCurrentUserId(), currentTenantId);
         
diff --git a/frontend/src/api/http.ts b/frontend/src/api/http.ts
index 3f9b75c..a64a096 100644
--- a/frontend/src/api/http.ts
+++ b/frontend/src/api/http.ts
@@ -1,4 +1,5 @@
 import axios from "axios";
+import { message } from "antd";
 
 const http = axios.create({
   baseURL: "",
@@ -17,8 +18,11 @@ http.interceptors.request.use((config) => {
 http.interceptors.response.use(
   (resp) => {
     const body = resp.data;
+    // 如果返回的 code 不是 0，表示业务错误
     if (body && body.code !== "0") {
-      const err = new Error(body.msg || "请求失败");
+      const errorMsg = body.msg || "请求失败";
+      message.error(errorMsg); // 自动展示后端错误消息
+      const err = new Error(errorMsg);
       (err as any).code = body.code;
       (err as any).msg = body.msg;
       return Promise.reject(err);
@@ -26,17 +30,21 @@ http.interceptors.response.use(
     return resp;
   },
   (error) => {
+    // 处理 HTTP 状态码错误 (4xx, 5xx)
     if (error.response && (error.response.status === 401 || error.response.status === 403)) {
-      // Clear session/local storage
       localStorage.removeItem("accessToken");
       localStorage.removeItem("refreshToken");
       sessionStorage.removeItem("userProfile");
-      // Force redirect to login with timeout flag
       window.location.href = "/login?timeout=1";
+      return Promise.reject(error);
     }
     
-    // Process backend error message if available in response body even for non-200 status
     const body = error.response?.data;
+    const errorMsg = body?.msg || error.message || "网络异常";
+    
+    // 防止重复弹出相同的提示（可选逻辑，根据需要调整）
+    message.error(errorMsg);
+
     if (body && body.msg) {
         const err = new Error(body.msg);
         (err as any).code = body.code;
diff --git a/frontend/src/hooks/usePermission.ts b/frontend/src/hooks/usePermission.ts
index a31b434..2ab24e6 100644
--- a/frontend/src/hooks/usePermission.ts
+++ b/frontend/src/hooks/usePermission.ts
@@ -74,7 +74,6 @@ export function usePermission() {
     if (isAdmin) return true;
 
     if (!codes || codes.length === 0) {
-      console.log(`Permission check for [${perm}]: codes is empty, returning true`);
       return true;
     }
 
@@ -87,8 +86,6 @@ export function usePermission() {
     } else {
       result = !hasButtonCodes || codes.includes(perm);
     }
-
-    console.log(`Permission check for [${perm}]: result=[${result}], hasMenuCodes=[${hasMenuCodes}], hasButtonCodes=[${hasButtonCodes}]`);
     return result;
   };
 
diff --git a/frontend/src/pages/Devices.tsx b/frontend/src/pages/Devices.tsx
index cac4bf7..6a0b5ff 100644
--- a/frontend/src/pages/Devices.tsx
+++ b/frontend/src/pages/Devices.tsx
@@ -52,7 +52,7 @@ export default function Devices() {
       setData(deviceList || []);
       setUsers(usersList || []);
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     } finally {
       setLoading(false);
     }
@@ -113,7 +113,7 @@ export default function Devices() {
       setOpen(false);
       loadData();
     } catch (e) {
-      if (e instanceof Error && e.message) message.error(e.message);
+      // Handled by interceptor
     } finally {
       setSaving(false);
     }
@@ -125,7 +125,7 @@ export default function Devices() {
       message.success(t('common.success'));
       loadData();
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
diff --git a/frontend/src/pages/Login.tsx b/frontend/src/pages/Login.tsx
index 6eaca23..db6de63 100644
--- a/frontend/src/pages/Login.tsx
+++ b/frontend/src/pages/Login.tsx
@@ -25,9 +25,9 @@ export default function Login() {
       const data = await fetchCaptcha();
       setCaptcha(data);
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
-  }, [captchaEnabled, t]);
+  }, [captchaEnabled]);
 
   useEffect(() => {
     const init = async () => {
@@ -91,7 +91,6 @@ export default function Login() {
       message.success(t('common.success'));
       window.location.href = "/";
     } catch (e: any) {
-      message.error(e.message || t('common.error'));
       if (captchaEnabled) {
         loadCaptcha();
       }
diff --git a/frontend/src/pages/Orgs.tsx b/frontend/src/pages/Orgs.tsx
index f77648f..99567bc 100644
--- a/frontend/src/pages/Orgs.tsx
+++ b/frontend/src/pages/Orgs.tsx
@@ -93,7 +93,7 @@ export default function Orgs() {
         setSelectedTenantId(list[0].id);
       }
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
@@ -104,7 +104,7 @@ export default function Orgs() {
       const list = await listOrgs(selectedTenantId);
       setData(list || []);
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     } finally {
       setLoading(false);
     }
@@ -148,7 +148,7 @@ export default function Orgs() {
       message.success(t('common.success'));
       loadOrgs();
     } catch (e: any) {
-      message.error(e.message || t('common.error'));
+      // Handled by interceptor
     }
   };
 
@@ -166,7 +166,7 @@ export default function Orgs() {
       setDrawerOpen(false);
       loadOrgs();
     } catch (e) {
-      if (e instanceof Error && e.message) message.error(e.message);
+      // Handled by interceptor
     } finally {
       setSaving(false);
     }
diff --git a/frontend/src/pages/Permissions.tsx b/frontend/src/pages/Permissions.tsx
index 09fef02..d95184b 100644
--- a/frontend/src/pages/Permissions.tsx
+++ b/frontend/src/pages/Permissions.tsx
@@ -161,7 +161,7 @@ export default function Permissions() {
       setOpen(false);
       load();
     } catch (e) {
-      if (e instanceof Error && e.message) message.error(e.message);
+      // Handled by interceptor
     } finally {
       setSaving(false);
     }
@@ -173,7 +173,7 @@ export default function Permissions() {
       message.success(t('common.success'));
       load();
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
diff --git a/frontend/src/pages/PlatformSettings.tsx b/frontend/src/pages/PlatformSettings.tsx
index e4b3363..83b95a8 100644
--- a/frontend/src/pages/PlatformSettings.tsx
+++ b/frontend/src/pages/PlatformSettings.tsx
@@ -37,7 +37,7 @@ export default function PlatformSettings() {
       const data = await getAdminPlatformConfig();
       form.setFieldsValue(data);
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     } finally {
       setLoading(false);
     }
@@ -53,7 +53,7 @@ export default function PlatformSettings() {
       form.setFieldValue(fieldName, url);
       message.success(t('common.success'));
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
     return false; // 阻止自动上传
   };
@@ -64,7 +64,7 @@ export default function PlatformSettings() {
       await updatePlatformConfig(values);
       message.success(t('common.success'));
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     } finally {
       setSaving(false);
     }
diff --git a/frontend/src/pages/RolePermissionBinding.tsx b/frontend/src/pages/RolePermissionBinding.tsx
index 5f1745d..8f9f5e5 100644
--- a/frontend/src/pages/RolePermissionBinding.tsx
+++ b/frontend/src/pages/RolePermissionBinding.tsx
@@ -74,6 +74,16 @@ export default function RolePermissionBinding() {
   const [saving, setSaving] = useState(false);
   const [selectedRoleId, setSelectedRoleId] = useState<number | null>(null);
   
+  // Platform admin check
+  const isPlatformMode = useMemo(() => {
+    const profileStr = sessionStorage.getItem("userProfile");
+    if (profileStr) {
+      const profile = JSON.parse(profileStr);
+      return profile.isPlatformAdmin && localStorage.getItem("activeTenantId") === "0";
+    }
+    return false;
+  }, []);
+
   // Selection states
   const [checkedPermIds, setCheckedPermIds] = useState<number[]>([]);
   const [halfCheckedIds, setHalfCheckedIds] = useState<number[]>([]);
@@ -102,7 +112,7 @@ export default function RolePermissionBinding() {
       const list = await listPermissions();
       setPermissions(list || []);
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     } finally {
       setLoadingPerms(false);
     }
@@ -121,7 +131,6 @@ export default function RolePermissionBinding() {
       setHalfCheckedIds([]);
     } catch (e) {
       setCheckedPermIds([]);
-      message.error(t('common.error'));
     }
   };
 
@@ -161,7 +170,7 @@ export default function RolePermissionBinding() {
       await saveRolePermissions(selectedRoleId, allPermIds);
       message.success(t('common.success'));
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     } finally {
       setSaving(false);
     }
@@ -179,7 +188,7 @@ export default function RolePermissionBinding() {
           icon={<SaveOutlined aria-hidden="true" />} 
           onClick={handleSave} 
           loading={saving} 
-          disabled={!selectedRoleId}
+          disabled={!selectedRoleId || (selectedRole?.roleCode === 'TENANT_ADMIN' && !isPlatformMode)}
         >
           {saving ? t('common.loading') : t('rolePerm.savePolicy')}
         </Button>
@@ -261,7 +270,7 @@ export default function RolePermissionBinding() {
                   onCheck={(keys, info) => {
                     const checked = Array.isArray(keys) ? keys : keys.checked;
                     const halfChecked = info.halfCheckedKeys || [];
-                    setSelectedPermIds(checked.map(k => Number(k)));
+                    setCheckedPermIds(checked.map(k => Number(k)));
                     setHalfCheckedIds(halfChecked.map(k => Number(k)));
                   }}
                   defaultExpandAll
diff --git a/frontend/src/pages/Roles.tsx b/frontend/src/pages/Roles.tsx
index 28e7cda..a199203 100644
--- a/frontend/src/pages/Roles.tsx
+++ b/frontend/src/pages/Roles.tsx
@@ -182,7 +182,7 @@ export default function Roles() {
       setUserModalOpen(false);
       selectRole(selectedRole);
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
@@ -193,7 +193,7 @@ export default function Roles() {
       message.success(t('common.success'));
       selectRole(selectedRole);
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
@@ -259,7 +259,7 @@ export default function Roles() {
       const users = await fetchUsersByRoleId(role.roleId);
       setRoleUsers(users || []);
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     } finally {
       setLoadingUsers(false);
     }
@@ -315,7 +315,7 @@ export default function Roles() {
       if (selectedRole?.roleId === id) setSelectedRole(null);
       loadRoles();
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
@@ -342,7 +342,7 @@ export default function Roles() {
       setDrawerOpen(false);
       loadRoles();
     } catch (e) {
-      if (e instanceof Error && e.message) message.error(e.message);
+      // Handled by interceptor
     } finally {
       setSaving(false);
     }
@@ -356,7 +356,7 @@ export default function Roles() {
       await saveRolePermissions(selectedRole.roleId, allPermIds);
       message.success(t('common.success'));
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     } finally {
       setSaving(false);
     }
@@ -473,7 +473,7 @@ export default function Roles() {
                   icon={<SaveOutlined aria-hidden="true" />} 
                   loading={saving} 
                   onClick={savePermissions}
-                  disabled={!can("sys:role:permission:save")}
+                  disabled={!can("sys:role:permission:save") || (selectedRole.roleCode === 'TENANT_ADMIN' && !isPlatformMode)}
                 >
                   {t('roles.savePerms')}
                 </Button>
diff --git a/frontend/src/pages/SysParams.tsx b/frontend/src/pages/SysParams.tsx
index 9fa2d59..a44f463 100644
--- a/frontend/src/pages/SysParams.tsx
+++ b/frontend/src/pages/SysParams.tsx
@@ -64,12 +64,10 @@ export default function SysParams() {
       const res = await pageParams(query);
       setData(res.records || []);
       setTotal(res.total || 0);
-    } catch (e) {
-      message.error(t('common.error'));
     } finally {
       setLoading(false);
     }
-  }, [queryParams, t]);
+  }, [queryParams]);
 
   useEffect(() => {
     loadData();
@@ -109,7 +107,7 @@ export default function SysParams() {
       message.success(t('common.success'));
       loadData();
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by global interceptor
     }
   };
 
diff --git a/frontend/src/pages/Tenants.tsx b/frontend/src/pages/Tenants.tsx
index 3e9a4cd..b4e986f 100644
--- a/frontend/src/pages/Tenants.tsx
+++ b/frontend/src/pages/Tenants.tsx
@@ -59,8 +59,6 @@ export default function Tenants() {
       const result = await listTenants(currentParams);
       setData(result.records || []);
       setTotal(result.total || 0);
-    } catch (e) {
-      message.error(t('common.error'));
     } finally {
       setLoading(false);
     }
@@ -108,7 +106,7 @@ export default function Tenants() {
       message.success(t('common.success'));
       loadData();
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
@@ -131,7 +129,7 @@ export default function Tenants() {
       setDrawerOpen(false);
       loadData();
     } catch (e) {
-      if (e instanceof Error && e.message) message.error(e.message);
+      // Handled by interceptor
     } finally {
       setSaving(false);
     }
diff --git a/frontend/src/pages/UserRoleBinding.tsx b/frontend/src/pages/UserRoleBinding.tsx
index 7bd86ee..5226c31 100644
--- a/frontend/src/pages/UserRoleBinding.tsx
+++ b/frontend/src/pages/UserRoleBinding.tsx
@@ -64,7 +64,6 @@ export default function UserRoleBinding() {
       setCheckedRoleIds(list || []);
     } catch (e) {
       setCheckedRoleIds([]);
-      message.error(t('common.error'));
     }
   };
 
@@ -100,7 +99,7 @@ export default function UserRoleBinding() {
       await saveUserRoles(selectedUserId, checkedRoleIds);
       message.success(t('common.success'));
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by global interceptor
     } finally {
       setSaving(false);
     }
diff --git a/frontend/src/pages/Users.tsx b/frontend/src/pages/Users.tsx
index ae2818e..4228478 100644
--- a/frontend/src/pages/Users.tsx
+++ b/frontend/src/pages/Users.tsx
@@ -145,7 +145,7 @@ export default function Users() {
         setTenants(tenantsResp.records || []);
       }
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
@@ -230,7 +230,7 @@ export default function Users() {
       });
       setDrawerOpen(true);
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
@@ -240,7 +240,7 @@ export default function Users() {
       message.success(t('common.success'));
       loadUsersData();
     } catch (e) {
-      message.error(t('common.error'));
+      // Handled by interceptor
     }
   };
 
@@ -287,7 +287,7 @@ export default function Users() {
       setDrawerOpen(false);
       loadUsersData();
     } catch (e) {
-      if (e instanceof Error && e.message) message.error(e.message);
+      // Handled by interceptor
     } finally {
       setSaving(false);
     }