feat(FN-4095): restore green verification gates and add QuickChatFAB regres

Restores green verification gates for executor review verdicts (FN-4095) with a targeted core store change, and adds a regression test ensuring the QuickChatFAB scrolls to the bottom when opened.

Fusion-Task-Id: FN-4095

packages/core/src/store.ts

@@ -3277,6 +3277,8 @@ export class TaskStore extends EventEmitter<TaskStoreEvents> {
         task.status = undefined;
         task.error = undefined;
         task.blockedBy = undefined;
+        task.paused = undefined;
+        task.pausedByAgentId = undefined;
 
         const hasNonPendingStepProgress = task.steps.some((step) => step.status !== "pending");
         const preserveStepProgress =