Add panel feature updates across API, daemon, and web

apps/web/src/lib/api.ts

@@ -9,6 +9,21 @@ interface RequestOptions extends RequestInit {
   params?: Record<string, string>;
 }
 
+function toRequestBody(body: unknown): BodyInit | undefined {
+  if (body === undefined || body === null) return undefined;
+
+  if (
+    body instanceof FormData ||
+    body instanceof Blob ||
+    body instanceof URLSearchParams ||
+    body instanceof ArrayBuffer
+  ) {
+    return body;
+  }
+
+  return JSON.stringify(body);
+}
+
 class ApiError extends Error {
   constructor(
     public status: number,
@@ -102,19 +117,19 @@ export const api = {
   post: <T>(path: string, body?: unknown) =>
     request<T>(path, {
       method: 'POST',
-      body: body ? JSON.stringify(body) : undefined,
+      body: toRequestBody(body),
     }),
 
   put: <T>(path: string, body?: unknown) =>
     request<T>(path, {
       method: 'PUT',
-      body: body ? JSON.stringify(body) : undefined,
+      body: toRequestBody(body),
     }),
 
   patch: <T>(path: string, body?: unknown) =>
     request<T>(path, {
       method: 'PATCH',
-      body: body ? JSON.stringify(body) : undefined,
+      body: toRequestBody(body),
     }),
 
   delete: <T>(path: string) =>