Add tsc check to lint github action (#45)

Author: bcongdon

.github/workflows/lint-and-format.yml

@@ -44,4 +44,7 @@ jobs:
         run: pnpm format:check
 
       - name: Run ESLint
-        run: pnpm lint
+        run: pnpm lint
+
+      - name: Run TypeScript check
+        run: pnpm tsc

src/core/chorus/WebTools.ts

@@ -26,7 +26,7 @@ type SearchProviderConfig = {
     baseURL: string;
     apiKey: string;
     model: string;
-    defaultHeaders?: Record<string, string>;
+    defaultHeaders?: Record<string, string | null>;
 };
 
 const OPENROUTER_PERPLEXITY_MODEL = "perplexity/sonar";
@@ -129,7 +129,13 @@ export class WebTools {
             const client = new OpenAI({
                 baseURL: providerConfig.baseURL,
                 apiKey: providerConfig.apiKey,
-                defaultHeaders: providerConfig.defaultHeaders,
+                defaultHeaders: providerConfig.defaultHeaders
+                    ? Object.fromEntries(
+                          Object.entries(providerConfig.defaultHeaders).filter(
+                              ([, value]) => value !== null,
+                          ),
+                      )
+                    : undefined,
                 dangerouslyAllowBrowser: true,
             });