feat(proxy): add proxy IP management and account routing

Add admin CRUD and connectivity checks for SOCKS5/SOCKS5H proxy nodes.

Allow accounts to bind to a proxy, route DeepSeek requests through the selected node, and expose proxy management in the admin UI.

webui/src/features/account/AccountManagerContainer.jsx

@@ -45,6 +45,7 @@ export default function AccountManagerContainer({ config, onRefresh, onMessage,
         batchProgress,
         sessionCounts,
         deletingSessions,
+        updatingProxy,
         addKey,
         deleteKey,
         addAccount,
@@ -52,6 +53,7 @@ export default function AccountManagerContainer({ config, onRefresh, onMessage,
         testAccount,
         testAllAccounts,
         deleteAllSessions,
+        updateAccountProxy,
     } = useAccountActions({
         apiFetch,
         t,
@@ -107,16 +109,19 @@ export default function AccountManagerContainer({ config, onRefresh, onMessage,
                 batchProgress={batchProgress}
                 sessionCounts={sessionCounts}
                 deletingSessions={deletingSessions}
+                updatingProxy={updatingProxy}
                 totalAccounts={totalAccounts}
                 page={page}
                 pageSize={pageSize}
                 totalPages={totalPages}
                 resolveAccountIdentifier={resolveAccountIdentifier}
+                proxies={config?.proxies || []}
                 onTestAll={testAllAccounts}
                 onShowAddAccount={() => setShowAddAccount(true)}
                 onTestAccount={testAccount}
                 onDeleteAccount={deleteAccount}
                 onDeleteAllSessions={deleteAllSessions}
+                onUpdateAccountProxy={updateAccountProxy}
                 onPrevPage={() => fetchAccounts(page - 1)}
                 onNextPage={() => fetchAccounts(page + 1)}
                 onPageSizeChange={changePageSize}

webui/src/features/account/AccountsTable.jsx

@@ -11,16 +11,19 @@ export default function AccountsTable({
     batchProgress,
     sessionCounts,
     deletingSessions,
+    updatingProxy,
     totalAccounts,
     page,
     pageSize,
     totalPages,
     resolveAccountIdentifier,
+    proxies,
     onTestAll,
     onShowAddAccount,
     onTestAccount,
     onDeleteAccount,
     onDeleteAllSessions,
+    onUpdateAccountProxy,
     onPrevPage,
     onNextPage,
     onPageSizeChange,
@@ -102,6 +105,7 @@ export default function AccountsTable({
                 ) : accounts.length > 0 ? (
                     accounts.map((acc, i) => {
                         const id = resolveAccountIdentifier(acc)
+                        const assignedProxy = proxies.find(proxy => proxy.id === acc.proxy_id)
                         const runtimeUnknown = envBacked && !acc.test_status
                         const isActive = acc.test_status === 'ok' || acc.has_token
                         return (
@@ -150,10 +154,28 @@ export default function AccountsTable({
                                                     )}
                                                 </button>
                                             )}
+                                            {acc.proxy_id && (
+                                                <span className="font-mono bg-amber-500/10 text-amber-500 px-1.5 py-0.5 rounded text-[10px]">
+                                                    {t('accountManager.proxyBadge', { name: assignedProxy ? (assignedProxy.name || `${assignedProxy.host}:${assignedProxy.port}`) : acc.proxy_id })}
+                                                </span>
+                                            )}
                                         </div>
                                     </div>
                                 </div>
                                 <div className="flex items-center gap-2 self-start lg:self-auto ml-5 lg:ml-0">
+                                    <select
+                                        value={acc.proxy_id || ''}
+                                        onChange={e => onUpdateAccountProxy(id, e.target.value)}
+                                        disabled={updatingProxy?.[id]}
+                                        className="max-w-[180px] px-2.5 py-1.5 text-[10px] lg:text-xs bg-secondary border border-border rounded-md focus:outline-none focus:ring-1 focus:ring-ring disabled:opacity-50"
+                                    >
+                                        <option value="">{t('accountManager.proxyNone')}</option>
+                                        {proxies.map(proxy => (
+                                            <option key={proxy.id} value={proxy.id}>
+                                                {proxy.name || `${proxy.host}:${proxy.port}`}
+                                            </option>
+                                        ))}
+                                    </select>
                                     <button
                                         onClick={() => onTestAccount(id)}
                                         disabled={testing[id]}

webui/src/features/account/useAccountActions.js

@@ -12,6 +12,7 @@ export function useAccountActions({ apiFetch, t, onMessage, onRefresh, config, f
     const [batchProgress, setBatchProgress] = useState({ current: 0, total: 0, results: [] })
     const [sessionCounts, setSessionCounts] = useState({})
     const [deletingSessions, setDeletingSessions] = useState({})
+    const [updatingProxy, setUpdatingProxy] = useState({})
 
     const addKey = async () => {
         if (!newKey.trim()) return
@@ -213,6 +214,34 @@ export function useAccountActions({ apiFetch, t, onMessage, onRefresh, config, f
         }
     }
 
+    const updateAccountProxy = async (identifier, proxyID) => {
+        const accountID = String(identifier || '').trim()
+        if (!accountID) {
+            onMessage('error', t('accountManager.invalidIdentifier'))
+            return
+        }
+        setUpdatingProxy(prev => ({ ...prev, [accountID]: true }))
+        try {
+            const res = await apiFetch(`/admin/accounts/${encodeURIComponent(accountID)}/proxy`, {
+                method: 'PUT',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ proxy_id: proxyID || '' }),
+            })
+            const data = await res.json()
+            if (!res.ok) {
+                onMessage('error', data.detail || t('messages.requestFailed'))
+                return
+            }
+            onMessage('success', t('accountManager.proxyUpdateSuccess'))
+            fetchAccounts()
+            onRefresh()
+        } catch (_err) {
+            onMessage('error', t('messages.networkError'))
+        } finally {
+            setUpdatingProxy(prev => ({ ...prev, [accountID]: false }))
+        }
+    }
+
     return {
         showAddKey,
         setShowAddKey,
@@ -230,6 +259,7 @@ export function useAccountActions({ apiFetch, t, onMessage, onRefresh, config, f
         batchProgress,
         sessionCounts,
         deletingSessions,
+        updatingProxy,
         addKey,
         deleteKey,
         addAccount,
@@ -237,5 +267,6 @@ export function useAccountActions({ apiFetch, t, onMessage, onRefresh, config, f
         testAccount,
         testAllAccounts,
         deleteAllSessions,
+        updateAccountProxy,
     }
 }