diff --git a/messages/en/settings.json b/messages/en/settings.json
index 6654ba5d1..5bab1013a 100644
--- a/messages/en/settings.json
+++ b/messages/en/settings.json
@@ -1150,6 +1150,7 @@
         "create": "Add Provider",
         "edit": "Edit Provider"
       },
+      "dialogDescription": "Configure provider details and advanced settings.",
       "url": {
         "label": "API Address *",
         "placeholder": "e.g. https://open.bigmodel.cn/api/anthropic"
@@ -1470,6 +1471,7 @@
       "errors": {
         "invalidUrl": "Please enter a valid API address",
         "invalidWebsiteUrl": "Please enter a valid provider website URL",
+        "groupTagTooLong": "Provider group tags are too long (max {max} chars total)",
         "addFailed": "Failed to add provider",
         "updateFailed": "Failed to update provider",
         "deleteFailed": "Failed to delete provider"
diff --git a/messages/ja/settings.json b/messages/ja/settings.json
index 23d7d5107..d3d1c5e60 100644
--- a/messages/ja/settings.json
+++ b/messages/ja/settings.json
@@ -1045,6 +1045,7 @@
         "create": "プロバイダーを追加",
         "edit": "プロバイダーを編集"
       },
+      "dialogDescription": "プロバイダーの詳細と高度な設定を構成します。",
       "url": {
         "label": "API アドレス *",
         "placeholder": "例: https://open.bigmodel.cn/api/anthropic"
@@ -1340,6 +1341,7 @@
       "errors": {
         "invalidUrl": "有効な API アドレスを入力してください",
         "invalidWebsiteUrl": "有効な公式サイト URL を入力してください",
+        "groupTagTooLong": "プロバイダーグループが長すぎます（合計{max}文字まで）",
         "addFailed": "プロバイダーの追加に失敗しました",
         "updateFailed": "プロバイダーの更新に失敗しました",
         "deleteFailed": "プロバイダーの削除に失敗しました"
diff --git a/messages/ru/settings.json b/messages/ru/settings.json
index dd248698d..ba5a032b8 100644
--- a/messages/ru/settings.json
+++ b/messages/ru/settings.json
@@ -1045,6 +1045,7 @@
         "create": "Добавить провайдера",
         "edit": "Редактировать провайдера"
       },
+      "dialogDescription": "Настройте детали провайдера и расширенные параметры.",
       "url": {
         "label": "Адрес API *",
         "placeholder": "например: https://open.bigmodel.cn/api/anthropic"
@@ -1340,6 +1341,7 @@
       "errors": {
         "invalidUrl": "Введите корректный адрес API",
         "invalidWebsiteUrl": "Введите корректный адрес сайта провайдера",
+        "groupTagTooLong": "Список групп провайдера слишком длинный (макс. {max} символов всего)",
         "addFailed": "Не удалось добавить провайдера",
         "updateFailed": "Не удалось обновить провайдера",
         "deleteFailed": "Не удалось удалить провайдера"
diff --git a/messages/zh-CN/settings.json b/messages/zh-CN/settings.json
index 9f2521247..75fc54d52 100644
--- a/messages/zh-CN/settings.json
+++ b/messages/zh-CN/settings.json
@@ -659,6 +659,7 @@
         "create": "新增服务商",
         "edit": "编辑服务商"
       },
+      "dialogDescription": "配置供应商信息及高级设置。",
       "url": {
         "label": "API 地址 *",
         "placeholder": "例如: https://open.bigmodel.cn/api/anthropic"
@@ -979,6 +980,7 @@
       "errors": {
         "invalidUrl": "请输入有效的 API 地址",
         "invalidWebsiteUrl": "请输入有效的供应商官网地址",
+        "groupTagTooLong": "分组标签总长度不能超过 {max} 个字符",
         "addFailed": "添加服务商失败",
         "updateFailed": "更新服务商失败",
         "deleteFailed": "删除服务商失败"
diff --git a/messages/zh-TW/settings.json b/messages/zh-TW/settings.json
index 258f023a9..379d6374c 100644
--- a/messages/zh-TW/settings.json
+++ b/messages/zh-TW/settings.json
@@ -1045,6 +1045,7 @@
         "create": "新增供應商",
         "edit": "編輯供應商"
       },
+      "dialogDescription": "設定供應商資訊與進階設定。",
       "url": {
         "label": "API 位址 *",
         "placeholder": "例如：https://open.bigmodel.cn/api/anthropic"
@@ -1346,6 +1347,7 @@
       "errors": {
         "invalidUrl": "請輸入有效的 API 位址",
         "invalidWebsiteUrl": "請輸入有效的供應商官網",
+        "groupTagTooLong": "分組標籤總長度不能超過 {max} 個字元",
         "addFailed": "新增供應商失敗",
         "updateFailed": "更新供應商失敗",
         "deleteFailed": "刪除供應商失敗"
diff --git a/src/app/[locale]/dashboard/_components/user/user-management-table.tsx b/src/app/[locale]/dashboard/_components/user/user-management-table.tsx
index 50e1c932c..f184a0362 100644
--- a/src/app/[locale]/dashboard/_components/user/user-management-table.tsx
+++ b/src/app/[locale]/dashboard/_components/user/user-management-table.tsx
@@ -261,12 +261,7 @@ export function UserManagementTable({
 
   useEffect(() => {
     if (!scrollResetKey) return;
-    parentRef.current?.scrollTo({ top: 0 });
-    // Defer measurement to next frame to ensure DOM has updated
-    const rafId = requestAnimationFrame(() => {
-      rowVirtualizer.measure();
-    });
-    return () => cancelAnimationFrame(rafId);
+    rowVirtualizer.scrollToOffset(0);
   }, [scrollResetKey, rowVirtualizer]);
 
   const quickRenewTranslations = useMemo(() => {
diff --git a/src/app/[locale]/settings/providers/_components/forms/provider-form.tsx b/src/app/[locale]/settings/providers/_components/forms/provider-form.tsx
index d241912cf..d93a90ed4 100644
--- a/src/app/[locale]/settings/providers/_components/forms/provider-form.tsx
+++ b/src/app/[locale]/settings/providers/_components/forms/provider-form.tsx
@@ -19,7 +19,7 @@ import {
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import { Collapsible, CollapsibleContent, CollapsibleTrigger } from "@/components/ui/collapsible";
-import { DialogFooter, DialogHeader, DialogTitle } from "@/components/ui/dialog";
+import { DialogDescription, DialogFooter, DialogHeader, DialogTitle } from "@/components/ui/dialog";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import {
@@ -41,6 +41,8 @@ import { ApiTestButton } from "./api-test-button";
 import { ProxyTestButton } from "./proxy-test-button";
 import { UrlPreview } from "./url-preview";
 
+const GROUP_TAG_MAX_TOTAL_LENGTH = 50;
+
 type Mode = "create" | "edit";
 
 interface ProviderFormProps {
@@ -295,6 +297,14 @@ export function ProviderForm({
       return;
     }
 
+    // group_tag 在 DB/schema 中限制为 varchar(50)，并且后端按整串校验 max(50)
+    // 这里限制逗号拼接后的总长度，避免“UI 看似可选多标签，但保存必失败”的体验
+    const serializedGroupTag = groupTag.join(",");
+    if (serializedGroupTag.length > GROUP_TAG_MAX_TOTAL_LENGTH) {
+      toast.error(t("errors.groupTagTooLong", { max: GROUP_TAG_MAX_TOTAL_LENGTH }));
+      return;
+    }
+
     // 检查 failureThreshold 是否为特殊值（0 或大于 100）
     const threshold = failureThreshold ?? 5;
     if (threshold === 0 || threshold > 100) {
@@ -306,6 +316,15 @@ export function ProviderForm({
     performSubmit();
   };
 
+  const handleGroupTagChange = (nextTags: string[]) => {
+    const serialized = nextTags.join(",");
+    if (serialized.length > GROUP_TAG_MAX_TOTAL_LENGTH) {
+      toast.error(t("errors.groupTagTooLong", { max: GROUP_TAG_MAX_TOTAL_LENGTH }));
+      return;
+    }
+    setGroupTag(nextTags);
+  };
+
   // 实际提交逻辑
   const performSubmit = () => {
     // 处理模型重定向（空对象转为 null）
@@ -519,6 +538,7 @@ export function ProviderForm({
     <>
       <DialogHeader className="flex-shrink-0">
         <DialogTitle>{isEdit ? t("title.edit") : t("title.create")}</DialogTitle>
+        <DialogDescription className="sr-only">{t("dialogDescription")}</DialogDescription>
       </DialogHeader>
 
       <form onSubmit={handleSubmit} className="flex flex-col flex-1 min-h-0">
@@ -692,16 +712,16 @@ export function ProviderForm({
                   <TagInput
                     id={isEdit ? "edit-group" : "group"}
                     value={groupTag}
-                    onChange={setGroupTag}
+                    onChange={handleGroupTagChange}
                     placeholder={t("sections.routing.scheduleParams.group.placeholder")}
                     disabled={isPending}
-                    maxTagLength={50}
+                    maxTagLength={GROUP_TAG_MAX_TOTAL_LENGTH}
                     suggestions={groupSuggestions}
                     onInvalidTag={(_tag, reason) => {
                       const messages: Record<string, string> = {
                         empty: tUI("emptyTag"),
                         duplicate: tUI("duplicateTag"),
-                        too_long: tUI("tooLong", { max: 50 }),
+                        too_long: tUI("tooLong", { max: GROUP_TAG_MAX_TOTAL_LENGTH }),
                         invalid_format: tUI("invalidFormat"),
                         max_tags: tUI("maxTags"),
                       };
diff --git a/src/app/[locale]/settings/providers/_components/forms/url-preview.tsx b/src/app/[locale]/settings/providers/_components/forms/url-preview.tsx
index 405f2b2b5..8c4b240e8 100644
--- a/src/app/[locale]/settings/providers/_components/forms/url-preview.tsx
+++ b/src/app/[locale]/settings/providers/_components/forms/url-preview.tsx
@@ -39,7 +39,8 @@ export function UrlPreview({ baseUrl, providerType }: UrlPreviewProps) {
     }
 
     try {
-      return previewProxyUrls(baseUrl, providerType);
+      const result = previewProxyUrls(baseUrl, providerType);
+      return Object.keys(result).length > 0 ? result : null;
     } catch {
       return null;
     }
diff --git a/src/app/[locale]/settings/providers/_components/provider-manager.tsx b/src/app/[locale]/settings/providers/_components/provider-manager.tsx
index 2648481d8..01307d567 100644
--- a/src/app/[locale]/settings/providers/_components/provider-manager.tsx
+++ b/src/app/[locale]/settings/providers/_components/provider-manager.tsx
@@ -1,7 +1,7 @@
 "use client";
 import { AlertTriangle, Loader2, Search, X } from "lucide-react";
 import { useTranslations } from "next-intl";
-import { type ReactNode, useMemo, useState } from "react";
+import { type ReactNode, useEffect, useMemo, useState } from "react";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
@@ -70,6 +70,13 @@ export function ProviderManager({
     return providers.filter((p) => healthStatus[p.id]?.circuitState === "open").length;
   }, [providers, healthStatus]);
 
+  // Auto-reset circuit broken filter when no providers are broken
+  useEffect(() => {
+    if (circuitBrokenCount === 0 && circuitBrokenFilter) {
+      setCircuitBrokenFilter(false);
+    }
+  }, [circuitBrokenCount, circuitBrokenFilter]);
+
   // Extract unique groups from all providers
   const allGroups = useMemo(() => {
     const groups = new Set<string>();
diff --git a/src/components/ui/chart.tsx b/src/components/ui/chart.tsx
index afdf4a1b2..ca82f9b5b 100644
--- a/src/components/ui/chart.tsx
+++ b/src/components/ui/chart.tsx
@@ -60,7 +60,11 @@ function ChartContainer({
         {...props}
       >
         <ChartStyle id={chartId} config={config} />
-        <RechartsPrimitive.ResponsiveContainer width="100%" height="100%">
+        <RechartsPrimitive.ResponsiveContainer
+          width="100%"
+          height="100%"
+          initialDimension={{ width: 0, height: 1 }}
+        >
           {children}
         </RechartsPrimitive.ResponsiveContainer>
       </div>