feat(s2a): Improve group name caching and display with api_base isolation

- Refactor groupNameCache structure to isolate caches by api_base: { [apiBase]: { [groupId]: groupName } }
- Add normalizeBase() utility to remove trailing slashes and prevent cache key mismatches
- Update group fetching logic to deduplicate requests by api_base and admin_key combination
- Auto-fetch available groups when entering edit mode for a profile with valid credentials
- Enhance group label display to show "name #id" format instead of just name or #id
- Sort profiles in list view to display active profile first
- Update ProfileCard to use normalized api_base for groupNameCache lookup
- Simplify group label rendering by removing conditional groupsFetched check

frontend/src/pages/S2AConfig.tsx

@@ -33,8 +33,8 @@ export default function S2AConfig() {
     const [fetchingGroups, setFetchingGroups] = useState(false)
     const [groupsFetched, setGroupsFetched] = useState(false)
 
-    // 列表视图分组名称缓存: { [groupId]: groupName }
-    const [groupNameCache, setGroupNameCache] = useState<Record<number, string>>({})
+    // 列表视图分组名称缓存: { [apiBase]: { [groupId]: groupName } }
+    const [groupNameCache, setGroupNameCache] = useState<Record<string, Record<number, string>>>({})
 
     const [saving, setSaving] = useState(false)
     const [testing, setTesting] = useState(false)
@@ -68,25 +68,30 @@ export default function S2AConfig() {
         Promise.all([fetchProfiles(), fetchActiveConfig()]).finally(() => setLoading(false))
     }, [fetchProfiles, fetchActiveConfig])
 
-    // 列表视图: 批量获取各 profile 的分组名称
+    // 规范化 api_base: 去掉尾部斜杠，防止缓存 key 不匹配
+    const normalizeBase = (base: string) => base.replace(/\/+$/, '')
+
+    // 列表视图: 批量获取各 profile 的分组名称（按 api_base 隔离）
     useEffect(() => {
         if (viewMode !== 'list' || profiles.length === 0) return
         const fetchGroupNames = async () => {
-            const cache: Record<number, string> = {}
+            const cache: Record<string, Record<number, string>> = {}
             // 按 api_base+admin_key 去重，避免重复请求
             const seen = new Map<string, S2AProfile>()
             for (const p of profiles) {
                 if (p.api_base && p.admin_key) {
-                    const key = `${p.api_base}|${p.admin_key}`
+                    const key = `${normalizeBase(p.api_base)}|${p.admin_key}`
                     if (!seen.has(key)) seen.set(key, p)
                 }
             }
             for (const p of seen.values()) {
                 try {
                     const groups = await fetchGroupsWithCredentials(p.api_base, p.admin_key)
+                    const map: Record<number, string> = {}
                     for (const g of groups) {
-                        cache[g.id] = g.name
+                        map[g.id] = g.name
                     }
+                    cache[normalizeBase(p.api_base)] = map
                 } catch { /* ignore - will show #id fallback */ }
             }
             setGroupNameCache(cache)
@@ -141,9 +146,21 @@ export default function S2AConfig() {
         setFormProxyAddress(profile.proxy_address || '')
         setTestResult(null)
         setAvailableGroups([])
-        setFetchingGroups(false)
         setGroupsFetched(false)
         setViewMode('edit')
+        // 自动获取分组列表
+        if (profile.api_base && profile.admin_key) {
+            setFetchingGroups(true)
+            fetchGroupsWithCredentials(profile.api_base, profile.admin_key)
+                .then(groups => {
+                    setAvailableGroups(groups)
+                    setGroupsFetched(true)
+                })
+                .catch(() => { /* ignore - will show #id fallback */ })
+                .finally(() => setFetchingGroups(false))
+        } else {
+            setFetchingGroups(false)
+        }
     }
 
     // 返回列表
@@ -279,10 +296,10 @@ export default function S2AConfig() {
         }
     }
 
-    // 获取分组名称
-    const getGroupName = (id: number): string => {
+    // 获取分组显示文字: "name #id" 或 "#id"
+    const getGroupLabel = (id: number): string => {
         const group = availableGroups.find(g => g.id === id)
-        return group ? group.name : `#${id}`
+        return group ? `${group.name} #${id}` : `#${id}`
     }
 
     const handleAddGroupId = () => {
@@ -424,7 +441,7 @@ export default function S2AConfig() {
                             <div className="flex flex-wrap gap-2">
                                 {formGroupIds.map(id => (
                                     <span key={id} className="inline-flex items-center gap-1.5 px-3 py-1 rounded-full text-sm bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-400">
-                                        {groupsFetched ? getGroupName(id) : `#${id}`}
+                                        {getGroupLabel(id)}
                                         <button onClick={() => handleRemoveGroupId(id)} className="hover:text-red-500 transition-colors"><X className="h-3 w-3" /></button>
                                     </span>
                                 ))}
@@ -549,13 +566,17 @@ export default function S2AConfig() {
                 </Card>
             ) : (
                 <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-3 gap-4">
-                    {profiles.map(profile => (
+                    {[...profiles].sort((a, b) => {
+                        const aActive = a.api_base === activeApiBase ? 1 : 0
+                        const bActive = b.api_base === activeApiBase ? 1 : 0
+                        return bActive - aActive
+                    }).map(profile => (
                         <ProfileCard
                             key={profile.id}
                             profile={profile}
                             isActive={activeApiBase === profile.api_base}
                             isActivating={activating === profile.id}
-                            groupNameCache={groupNameCache}
+                            groupNameCache={groupNameCache[normalizeBase(profile.api_base)] || {}}
                             onActivate={() => handleActivate(profile)}
                             onEdit={() => handleEdit(profile)}
                             onDelete={() => handleDelete(profile.id, profile.name)}
@@ -609,7 +630,7 @@ function ProfileCard({ profile, isActive, isActivating, groupNameCache, onActiva
                     </span>
                     {parsedGroups.length > 0 && (
                         <span className="inline-flex items-center px-2 py-0.5 rounded text-xs bg-blue-50 text-blue-600 dark:bg-blue-900/30 dark:text-blue-400">
-                            分组 {parsedGroups.map(id => groupNameCache[id] || `#${id}`).join(', ')}
+                            分组 {parsedGroups.map(id => groupNameCache[id] ? `${groupNameCache[id]} #${id}` : `#${id}`).join(', ')}
                         </span>
                     )}
                     {profile.proxy_enabled && (