feat(core): fully reset in-review → todo so the task starts over

Previously this transition cleared only transient execution state
(status/error/worktree/blockedBy/workflowStepResults), but kept the
prior branch, baseBranch, baseCommitSha, summary, and recovery
counters. That meant retrying a reviewed task resumed on the old
branch with a stale summary instead of starting fresh. Now those
fields are also cleared on in-review → todo. Other reopen paths
(in-progress/done → todo/triage) keep their existing behavior.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/core/src/store.ts

@@ -2615,6 +2615,17 @@ export class TaskStore extends EventEmitter<TaskStoreEvents> {
         task.workflowStepResults = undefined;
       }
 
+      // Full reset when sending an in-review task back to todo: discard prior
+      // branch/summary/recovery state so the next run starts from scratch.
+      if (fromColumn === "in-review" && toColumn === "todo") {
+        task.branch = undefined;
+        task.baseBranch = undefined;
+        task.baseCommitSha = undefined;
+        task.summary = undefined;
+        task.recoveryRetryCount = undefined;
+        task.nextRecoveryAt = undefined;
+      }
+
       await this.atomicWriteTaskJson(dir, task);
 
       // Update cache if watcher is active