Q151: deleting a task first shows what goes with it, then waits for the result

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main/services/task-mutations.ts

@@ -1,3 +1,4 @@
+import type { TaskDeleteImpact } from "../../shared/domain";
 import type { DatabaseSync } from "node:sqlite";
 import { RISK_LEVEL, TASK_STATUS, type TaskPriority } from "../../shared/domain";
 import type { CreateTaskInput, DeleteTaskInput, SetTaskBlockedInput, UpdateTaskInput } from "../../shared/commands";
@@ -70,6 +71,20 @@ export class TaskMutations {
     });
   }
 
+  /** What deleting the task would remove, keep and close, counted from the database. */
+  deleteImpact(orgId: string, taskId: string): TaskDeleteImpact {
+    this.requireTask(orgId, taskId);
+    const count = (sql: string) => (this.db.prepare(sql).get(taskId, orgId) as { n: number }).n;
+    return {
+      runs: count("select count(*) as n from task_runs where task_id = ? and org_id = ?"),
+      running: count("select count(*) as n from task_runs where task_id = ? and org_id = ? and state = 'running'"),
+      subtasks: count("select count(*) as n from tasks where parent_task_id = ? and org_id = ?"),
+      documents: count("select count(*) as n from documents where task_id = ? and org_id = ?"),
+      openReviews: count("select count(*) as n from tasks where review_of_task_id = ? and org_id = ? and status <> 'done'"),
+      pendingApprovals: count("select count(*) as n from approvals where source_entity_type = 'task' and source_entity_id = ? and org_id = ? and state = 'pending'"),
+    };
+  }
+
   /** Blocks the task with a reason (no session starts, queued ones are superseded) or unblocks it with null. */
   setBlocked(input: SetTaskBlockedInput): void {
     const reason = input.reason === null ? null : input.reason.trim();