refactor(dashboard): change SpawnModal from overlay modal to dropdown

Position the spawn modal directly under the 'New Agent' button without a
blur overlay. Uses click-outside dismissal and absolute positioning.
Reduces visual disruption for quick agent spawning.

dashboard/utils/api.js

@@ -29,11 +29,11 @@ export async function fetchWithTimeout(url, options = {}, timeoutMs = API_TIMEOU
 export async function fetchSkills(agent) {
   const url = `${API_SKILLS}?agent=${encodeURIComponent(agent)}`;
   try {
-    const response = await fetch(url);
+    const response = await fetchWithTimeout(url);
     if (!response.ok) return null;
-    return response.json();
+    return await response.json();
   } catch {
-    // Network error or other failure - graceful degradation
+    // Network error, timeout, or JSON parse failure - graceful degradation
     return null;
   }
 }