新增: provider 支持(11 厂商预设 + modalities 修正 + defaultModel 更新 + 噪音过滤 + UI 提示)

providerPresets 扩展 6 厂商(Qwen/Kimi/ERNIE/Spark/Doubao/Gemini)+ SenseNova base_url 修正;
modalities 预设表补 SenseNova flash-lite vision;defaultModel 过时更新;sensenova-u1 图像生成
噪音过滤;ProviderPanel defaultModel UI 提示。

src/i18n/en/settings.ts

@@ -53,6 +53,10 @@ export default {
     phBaseUrl: 'https://api.deepseek.com',
     phApiKey: 'sk-...',
     phDefaultModel: 'deepseek-chat',
+    // Direction A (lightweight): defaultModel is only a "suggested starting point";
+    // guide users to hit "Test connection" to pull the vendor's real model list and overwrite,
+    // avoiding stale preset model ids (DeepSeek chat deprecated / Gemini 2.5→3.5 etc.) misleading them.
+    defaultModelHint: 'Suggested starting point — hit "Test connection" to pull the vendor’s real model list and overwrite',
     providerTypeOpenaiCompat: 'OpenAI-compatible (DeepSeek / GLM v4 / OpenAI)',
     providerTypeAnthropic: 'Anthropic-compatible (GLM subscription / Claude)',
     saving: 'Saving...',