feat(opencode): add API key link support for OpenCode provider form

Enable API key link feature for OpenCode app, allowing users to access
provider websites for key registration directly from the form.

src/components/providers/forms/OpenCodeFormFields.tsx

@@ -139,6 +139,8 @@ interface OpenCodeFormFieldsProps {
   category?: ProviderCategory;
   shouldShowApiKeyLink: boolean;
   websiteUrl: string;
+  isPartner?: boolean;
+  partnerPromotionKey?: string;
 
   // Base URL
   baseUrl: string;
@@ -161,6 +163,8 @@ export function OpenCodeFormFields({
   category,
   shouldShowApiKeyLink,
   websiteUrl,
+  isPartner,
+  partnerPromotionKey,
   baseUrl,
   onBaseUrlChange,
   models,
@@ -376,6 +380,8 @@ export function OpenCodeFormFields({
         category={category}
         shouldShowLink={shouldShowApiKeyLink}
         websiteUrl={websiteUrl}
+        isPartner={isPartner}
+        partnerPromotionKey={partnerPromotionKey}
       />
 
       {/* Base URL */}