fix: handle missing getState method in provider for Task constructor

- Add defensive check for provider.getState existence before calling it
- Prevents TypeError when provider doesn't have getState method defined
- Fixes failing tests in Task.spec.ts

Author: hannesrudolph

src/core/task/Task.ts

@@ -280,7 +280,7 @@ export class Task extends EventEmitter<ClineEvents> {
 		}
 
 		// If no historyItem, get the current mode from provider
-		if (!historyItem) {
+		if (!historyItem && provider.getState) {
 			provider
 				.getState()
 				.then((state) => {