feat(planner): 触发上下文带实际变动 + 心跳触发改为「定时巡检」措辞

把 planner 每轮的触发信号从「固定一句"图发生了变化"」升级为具体变动：

- 统一 TriggerEvent{Kind,IntentID,Detail} 累加器(替换原 doneIntents):
  worker 结束→{done}, report_finding→{finding,摘要}。Task.NotifyDone/新增
  NotifyFinding 记录, drainTriggers 消费, Plan 参数改为 []TriggerEvent。
- renderTriggers 渲染:worker 结束→哪个意图(摘要)+worker 输出结论(取 result/text
  全文,截断800字);finding→哪个意图+finding 摘要。
- worker 回调 notify()→notifyFinding(intentID,summary),report_finding 落库带上下文。
- 时间/心跳触发(triggers 为空)不再谎称"图发生了变化",开场白改为「定时巡检」并
  提示复查在跑意图(steer_work 纠偏/kill_work 止损),对齐心跳的飞行中监督职责。

agent/worker.go

@@ -234,21 +234,22 @@ func renderWorkerGraphOverview(data map[string]any) string {
 
 // Execute runs one intent. hooks (the per-task Guard) gates every tool call; may
 // be nil. emit, if non-nil, receives one ActivityRecord per execution step.
-// notify, if non-nil, is called when this worker writes a finding (report_finding)
-// so the task's planner wakes mid-flight instead of waiting for the worker to finish.
+// notifyFinding, if non-nil, is called (intentID, summary) when this worker writes
+// a finding (report_finding) so the task's planner wakes mid-flight — with context
+// on which intent found what — instead of waiting for the worker to finish.
 // Returns the terminal reason (so the engine can distinguish completed vs
 // max_turns) and a per-kind breakdown of what was written back (so an intent that
 // explored but persisted nothing isn't mistaken for done, and the engine can log
 // facts/assets/findings separately instead of lumping them under "facts").
-func (w *Worker) Execute(ctx context.Context, name string, taskID int64, as *db.AssetStore, ts *db.ExplorationStore, intent *db.Node, hooks harness.HookRunner, emit func(db.Activity), enr EnrichTrigger, notify func()) (harness.TerminalReason, WriteCounts, error) {
+func (w *Worker) Execute(ctx context.Context, name string, taskID int64, as *db.AssetStore, ts *db.ExplorationStore, intent *db.Node, hooks harness.HookRunner, emit func(db.Activity), enr EnrichTrigger, notifyFinding func(int64, string)) (harness.TerminalReason, WriteCounts, error) {
 	tsx := NewToolSet(ts, name)
 	tsx.SetTaskID(taskID)
 	if as != nil {
 		tsx.SetAssetStore(as, as.Companies())
 	}
-	tsx.SetOwnerNode(intent.ID) // assets this worker discovers anchor to its intent → visible to the task
-	tsx.SetEnrich(enr)          // async DNS/HTTP auto-completion for assets this worker writes
-	tsx.SetNotify(notify)       // finding 写回时当场唤醒本任务 planner（report_finding 触发）
+	tsx.SetOwnerNode(intent.ID)         // assets this worker discovers anchor to its intent → visible to the task
+	tsx.SetEnrich(enr)                  // async DNS/HTTP auto-completion for assets this worker writes
+	tsx.SetNotifyFinding(notifyFinding) // report_finding 落库时当场唤醒 planner，带上「哪个意图+finding」
 	// base = built-in worker tools ∪ host tools (traffic) ∪ default tools (incl. Bash);
 	// then augment with the agent's visible skills/MCP. During the SDK settlement
 	// phase, Bash is hidden via Settlement.DisabledTools (no local gating needed).