feat(planner): finding 当场唤醒 + planner N 秒心跳触发(任务参数,默认5min)

触发机制补两条(见 docs/planner-trigger-impl-plan.md)：

1) finding 当场唤醒：worker 飞行中 report_finding 落库即唤醒本任务 planner，
   不再等 worker 整趟收工才反应。
   - worker.Execute 加 notify 入参并 SetNotify(补上 worker toolset 之前缺失的接线)
   - addFinding 写 KindFinding 成功后调 notify(只对 finding,不对 fact)
   - engine 两处 worker.Execute 调用传 t.Notify

2) planner N 秒心跳：距上轮规划结束/任务开始满 N 秒且期间无触发 → 触发一轮，
   兜底卡死 + 唤醒去监督飞行中的 worker(steer/kill) + 周期复查。
   - plannerLoop 重构为 runRound 闭包 + 三臂 select(ctx/notify/heartbeat)
   - 心跳在 loop 入口臂 = 从任务 start 计时(覆盖 seed 跳过首轮)，每轮结束重臂
   - 新增任务参数 plan_heartbeat_seconds，下限=默认=300(5min),低于自动抬到300
   - DB 迁移：schema.sql 加列 + ALTER ADD COLUMN IF NOT EXISTS 补旧库
   - 全链路接线：db.CreateTask/manager/server HTTP/orchestration spawn_task
   - 前端：api.createTask 传参 + 建任务表单新增"planner 心跳(分钟)"字段

web/src/app/(main)/function/tasks/page.tsx

@@ -111,6 +111,7 @@ export default function TasksPage() {
   const [profiles, setProfiles] = React.useState<LLMProfile[]>([]);
   const [llmProfile, setLlmProfile] = React.useState<string>(ACTIVE_PROFILE); // sentinel = active
   const [timeoutMin, setTimeoutMin] = React.useState(""); // 任务级超时(分钟);空/0 = 不限时
+  const [heartbeatMin, setHeartbeatMin] = React.useState("5"); // planner 心跳(分钟);默认5,下限5(与后端一致)
   const [seedFirstIntent, setSeedFirstIntent] = React.useState(true); // 创建时下发种子意图,worker 免等首轮 planner 直接开跑
   const [open, setOpen] = React.useState(false);
   const [query, setQuery] = React.useState("");
@@ -173,12 +174,14 @@ export default function TasksPage() {
     try {
       const pid = llmProfile === ACTIVE_PROFILE ? undefined : Number(llmProfile);
       const timeoutSec = Math.max(0, Math.floor(Number(timeoutMin) || 0)) * 60;
-      await api.createTask(description.trim(), goal.trim(), pid, timeoutSec, seedFirstIntent);
+      const heartbeatSec = Math.max(5, Math.floor(Number(heartbeatMin) || 5)) * 60; // 下限 5min，与后端归一一致
+      await api.createTask(description.trim(), goal.trim(), pid, timeoutSec, seedFirstIntent, heartbeatSec);
       toast.success("任务已创建");
       setDescription("");
       setGoal("");
       setLlmProfile(ACTIVE_PROFILE);
       setTimeoutMin("");
+      setHeartbeatMin("5");
       setSeedFirstIntent(true);
       setOpen(false);
       load();
@@ -303,6 +306,21 @@ export default function TasksPage() {
                     到点后触发优雅收尾（各 agent 写回 + planner 终局判定），任务进入 timeout 终态。
                   </p>
                 </div>
+                <div className="grid gap-2">
+                  <Label htmlFor="heartbeat-min">planner 心跳（分钟）</Label>
+                  <Input
+                    id="heartbeat-min"
+                    type="number"
+                    min={5}
+                    className="w-40"
+                    placeholder="默认 5"
+                    value={heartbeatMin}
+                    onChange={(e) => setHeartbeatMin(e.target.value)}
+                  />
+                  <p className="text-muted-foreground text-xs">
+                    距上轮规划结束/任务开始满该时长且期间无触发，自动触发一轮规划（兜底卡死 + 唤醒去监督在跑的 worker）。下限 5 分钟。
+                  </p>
+                </div>
                 <div className="grid gap-2">
                   <label className="flex items-center gap-2 text-sm">
                     <Checkbox checked={seedFirstIntent} onCheckedChange={(v) => setSeedFirstIntent(!!v)} />

web/src/lib/api.ts

@@ -109,13 +109,14 @@ export const api = {
 
   // ---- tasks ----
   tasks: () => get<{ tasks: Task[]; active: string }>("/tasks").then((r) => ({ tasks: arr(r.tasks), active: r.active ?? "" })),
-  createTask: (description: string, goal: string, llmProfileId?: number, timeoutSeconds?: number, seedFirstIntent?: boolean) =>
+  createTask: (description: string, goal: string, llmProfileId?: number, timeoutSeconds?: number, seedFirstIntent?: boolean, planHeartbeatSeconds?: number) =>
     post<Task>("/tasks", {
       description,
       goal,
       llm_profile_id: llmProfileId ?? null,
       timeout_seconds: timeoutSeconds ?? 0,
       seed_first_intent: seedFirstIntent ?? true,
+      plan_heartbeat_seconds: planHeartbeatSeconds ?? 0, // 0 = 后端归一到默认 300(5min)
     }),
   deleteTask: (id: string) => del<{ deleted: number }>(`/tasks/${id}`),
   controlTask: (id: string, action: "pause" | "resume") => post<{ id: string; paused: boolean }>(`/tasks/${id}/control`, { action }),