fix: 完善大模型供应商下拉

- 移除当前协议不兼容的 Perplexity 预设
- 限制供应商与模型列表高度并支持滚动

frontend/src/components/aiops/LLMConfig.tsx

@@ -206,7 +206,7 @@ export default function LLMConfigPage() {
               <Label className="text-[var(--dg-text-secondary)]">{t('aiops.providerLabel')}</Label>
               <Select value={cfg.provider} onValueChange={onProvider}>
                 <SelectTrigger className="dg-input"><SelectValue /></SelectTrigger>
-                <SelectContent className="dg-input">
+                <SelectContent className="dg-input max-h-96">
                   {unknownProvider && (
                     <SelectGroup>
                       <SelectLabel>{t('deploy.toast.saved')}</SelectLabel>
@@ -262,7 +262,7 @@ export default function LLMConfigPage() {
                   <SelectTrigger className="dg-input">
                     <SelectValue placeholder={t('aiops.selectModel')} />
                   </SelectTrigger>
-                  <SelectContent className="dg-input">
+                  <SelectContent className="dg-input max-h-96">
                     {models.map((m) => <SelectItem key={m} value={m}>{m}</SelectItem>)}
                     <SelectItem value="__manual">{t('system.manualInput')}</SelectItem>
                   </SelectContent>

frontend/src/components/aiops/llmProviders.ts

@@ -113,11 +113,6 @@ export const CLOUD_GENERAL_PROVIDERS: ProviderMeta[] = [
     models: ['gpt-oss-120b', 'zai-glm-4.7', 'gemma-4-31b'],
     planUrl: 'https://cloud.cerebras.ai/platform/', planLabelKey: 'aiops.getApiKey',
   },
-  {
-    id: 'perplexity', nameKey: 'aiops.providerPerplexity', endpoint: 'https://api.perplexity.ai',
-    models: ['sonar-pro', 'sonar-reasoning-pro', 'sonar'],
-    planUrl: 'https://www.perplexity.ai/account/api/keys', planLabelKey: 'aiops.getApiKey',
-  },
 ];
 
 // 编码套餐使用独立密钥或专用端点，不与通用 API 配置混用。 // Logan.Li

frontend/src/locales/en-US.json

@@ -8648,7 +8648,6 @@
     "providerOllama": "Ollama",
     "providerOpenai": "OpenAI",
     "providerOpenrouter": "OpenRouter",
-    "providerPerplexity": "Perplexity",
     "providerQwen": "Qwen",
     "providerSiliconflow": "SiliconFlow",
     "providerSpark": "iFlytek Spark",

frontend/src/locales/zh-CN.json

@@ -8648,7 +8648,6 @@
     "providerOllama": "Ollama",
     "providerOpenai": "OpenAI",
     "providerOpenrouter": "OpenRouter",
-    "providerPerplexity": "Perplexity",
     "providerQwen": "通义千问",
     "providerSiliconflow": "硅基流动",
     "providerSpark": "讯飞星火",