Enhance token refresh functionality across multiple executors

- Updated refreshCredentials methods in various executors (Antigravity, Base, Default, Github, Kiro) to accept optional proxyOptions for improved proxy handling.
- Modified token refresh logic to utilize proxy-aware fetch for better network management.
- Enhanced usage retrieval functions to support proxy options, ensuring seamless integration with proxy configurations.
- Updated ModelSelectModal and ProviderInfoCard components to incorporate kind filtering for improved user experience in model selection.
- Added validation for API keys in the provider validation route, including support for webSearch/webFetch providers.

src/app/api/combos/route.js

@@ -21,7 +21,7 @@ export async function GET() {
 export async function POST(request) {
   try {
     const body = await request.json();
-    const { name, models } = body;
+    const { name, models, kind } = body;
 
     if (!name) {
       return NextResponse.json({ error: "Name is required" }, { status: 400 });
@@ -38,7 +38,7 @@ export async function POST(request) {
       return NextResponse.json({ error: "Combo name already exists" }, { status: 400 });
     }
 
-    const combo = await createCombo({ name, models: models || [] });
+    const combo = await createCombo({ name, models: models || [], kind: kind || null });
 
     return NextResponse.json(combo, { status: 201 });
   } catch (error) {