feat: add API key links for third-party providers and simplify Kimi model labels

- Add "Get API Key" link support for third-party providers (e.g., PackyCode)
- Simplify Kimi model selector labels by removing technical field names
  - Changed "主模型 (ANTHROPIC_MODEL)" to "主模型"
  - Changed "快速模型 (ANTHROPIC_SMALL_FAST_MODEL)" to "快速模型"
- Improve user experience with cleaner, more intuitive interface labels

src/components/ProviderForm.tsx

@@ -473,12 +473,13 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
   // 判断是否显示基础 URL 输入框（仅自定义模式显示）
   const showBaseUrlInput = selectedPreset === -1 && !isCodex;
 
-  // 判断是否显示"获取 API Key"链接（国产官方和聚合站显示）
+  // 判断是否显示"获取 API Key"链接（国产官方、聚合站和第三方显示）
   const shouldShowApiKeyLink = !isCodex && !isOfficialPreset && 
-    (category === "cn_official" || category === "aggregator" || 
+    (category === "cn_official" || category === "aggregator" || category === "third_party" ||
      (selectedPreset !== null && selectedPreset >= 0 && 
       (providerPresets[selectedPreset]?.category === "cn_official" || 
-       providerPresets[selectedPreset]?.category === "aggregator")));
+       providerPresets[selectedPreset]?.category === "aggregator" ||
+       providerPresets[selectedPreset]?.category === "third_party")));
   
   // 获取当前供应商的网址
   const getCurrentWebsiteUrl = () => {

src/components/ProviderForm/KimiModelSelector.tsx

@@ -158,12 +158,12 @@ const KimiModelSelector: React.FC<KimiModelSelectorProps> = ({
 
       <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
         <ModelSelect
-          label="主模型 (ANTHROPIC_MODEL)"
+          label="主模型"
           value={anthropicModel}
           onChange={(value) => onModelChange("ANTHROPIC_MODEL", value)}
         />
         <ModelSelect
-          label="快速模型 (ANTHROPIC_SMALL_FAST_MODEL)"
+          label="快速模型"
           value={anthropicSmallFastModel}
           onChange={(value) =>
             onModelChange("ANTHROPIC_SMALL_FAST_MODEL", value)