feat(llm): 任务 LLM 配置链改为任何状态都可修改

任务结束(done/failed/timeout)后主 Agent 对话仍走任务配置链,链上模型出问题时
既不能改配置链、也就没法继续交互。去掉 HTTP 与 DB 事务两处终态拦截,前端弹窗
对终态任务同样开放编辑与保存(顺带修掉 queued 状态也不能编辑的口子)。

终态任务保存时不再重开额度阻塞意图:那些意图会从 blocked 挪到 open,既没有
worker 执行、也不再满足「重跑意图」的可重跑条件,反而变成死状态。终态任务想
继续跑仍走重跑意图/新增目标,由它们把任务重新 admit 回运行态。

CHANGELOG.md

@@ -4,6 +4,12 @@
 
 ## [Unreleased]
 
+### LLM
+
+#### 修改的功能
+
+- 任务 LLM 配置链改为任何状态都可修改，不再限制「运行中 / 暂停 / 配置链耗尽」：任务结束（done / failed / timeout）后主 Agent 对话仍走这条链，链上模型出问题时原先既不能改也就没法继续交互。后端 HTTP 与 DB 事务两处终态拦截一并去掉，前端弹窗对终态任务也开放编辑与保存。终态任务保存时不再重开额度阻塞意图（那些意图会被挪到 open，既没有 worker 执行、也不再满足「重跑意图」的条件），想继续跑仍走重跑意图 / 新增目标，由它们把任务重新拉回运行态。
+
 ## [0.3.6] - 2026-08-27
 
 ### LLM

db/task_context.go

@@ -402,6 +402,8 @@ FROM task_llm_profiles WHERE task_id=$1 ORDER BY position`, taskID)
 // ReplaceTaskLLMProfiles atomically replaces and resets the explicit task chain.
 // activeProfileID=0 selects the first entry. An empty list restores the existing
 // agent-binding/global fallback behavior.
+// 终态(done/failed/timeout)任务同样允许改链:任务结束后主 Agent 对话仍会走这条链,
+// 链上模型不可用时必须能换,否则已完成任务就再也没法交互了。
 func (d *DB) ReplaceTaskLLMProfiles(taskID int64, profileIDs []int64, activeProfileID int64) error {
 	tx, err := d.Begin()
 	if err != nil {
@@ -411,16 +413,13 @@ func (d *DB) ReplaceTaskLLMProfiles(taskID int64, profileIDs []int64, activeProf
 	// Keep the task -> profile lock order shared by all task LLM mutations and
 	// DeleteProfile. Inserts below may take KEY SHARE locks on llm_profiles for
 	// their foreign keys, so the task row must be locked before any of them.
-	var status string
+	var lockedID int64
-	if err := tx.QueryRow(`SELECT status FROM tasks WHERE id=$1 AND deleted_at IS NULL FOR UPDATE`, taskID).Scan(&status); err != nil {
+	if err := tx.QueryRow(`SELECT id FROM tasks WHERE id=$1 AND deleted_at IS NULL FOR UPDATE`, taskID).Scan(&lockedID); err != nil {
 		if err == sql.ErrNoRows {
 			return fmt.Errorf("task %d not found", taskID)
 		}
 		return err
 	}
-	if IsTerminal(status) {
-		return fmt.Errorf("terminal task cannot change LLM profiles")
-	}
 	if _, err := tx.Exec(`DELETE FROM task_llm_profiles WHERE task_id=$1`, taskID); err != nil {
 		return err
 	}

db/tasks_test.go

@@ -464,7 +464,7 @@ func TestTaskRelationsAndLLMFailoverChain(t *testing.T) {
 	}
 }
 
-func TestTaskContextRejectsDuplicatesAndTerminalEdits(t *testing.T) {
+func TestTaskContextRejectsDuplicatesAndAllowsTerminalLLMEdits(t *testing.T) {
 	d, err := Open(testDSN(t))
 	if err != nil {
 		t.Skipf("postgres unavailable (%v) - skipping", err)
@@ -480,6 +480,17 @@ func TestTaskContextRejectsDuplicatesAndTerminalEdits(t *testing.T) {
 		t.Fatal("duplicate source task ids should be rejected")
 	}
 
+	// 终态任务仍然可以改 LLM 配置链:任务结束后主 Agent 对话继续走这条链,
+	// 链上模型不可用时必须还能换。
+	profileID, err := d.SaveProfile(&LLMProfile{
+		Name: fmt.Sprintf("terminal-chain-%d", time.Now().UnixNano()), Format: "openai",
+		Model: "terminal-model", APIKey: "test-key",
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = d.DeleteProfile(profileID) })
+
 	task, err := d.CreateTask("terminal", "goal", nil, 0, 0)
 	if err != nil {
 		t.Fatal(err)
@@ -488,8 +499,21 @@ func TestTaskContextRejectsDuplicatesAndTerminalEdits(t *testing.T) {
 	if err := d.SetStatus(task.ID, "done"); err != nil {
 		t.Fatal(err)
 	}
-	if err := d.ReplaceTaskLLMProfiles(task.ID, nil, 0); err == nil {
+	if err := d.ReplaceTaskLLMProfiles(task.ID, []int64{profileID}, profileID); err != nil {
-		t.Fatal("terminal task LLM edit should be rejected")
+		t.Fatalf("terminal task LLM edit should be allowed: %v", err)
+	}
+	got, err := d.GetTask(task.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if fmt.Sprint(got.LLMProfileIDs) != fmt.Sprint([]int64{profileID}) {
+		t.Fatalf("terminal task chain not persisted: %v", got.LLMProfileIDs)
+	}
+	if got.ActiveLLMProfileID == nil || *got.ActiveLLMProfileID != profileID {
+		t.Fatalf("terminal task active profile not persisted: %v", got.ActiveLLMProfileID)
+	}
+	if err := d.ReplaceTaskLLMProfiles(task.ID, nil, 0); err != nil {
+		t.Fatalf("clearing a terminal task's chain should be allowed: %v", err)
 	}
 }
 

server/manager.go

@@ -935,8 +935,9 @@ func (m *Manager) DeleteCompanyWithAssets(id int64, deleteAssets bool) (int64, e
 	return assetsDeleted, nil
 }
 
-// ReplaceTaskLLMProfiles resets a non-terminal task's ordered provider chain and
+// ReplaceTaskLLMProfiles resets a task's ordered provider chain and mirrors the
-// mirrors the committed state onto the live task handle.
+// committed state onto the live task handle. Terminal tasks are editable too —
+// their 主 Agent 对话 keeps running on the chain after the task finishes.
 func (m *Manager) ReplaceTaskLLMProfiles(id string, profileIDs []int64, activeProfileID int64) (int64, error) {
 	n, err := strconv.ParseInt(id, 10, 64)
 	if err != nil {
@@ -954,6 +955,13 @@ func (m *Manager) ReplaceTaskLLMProfiles(id string, profileIDs []int64, activePr
 		task.setLLMState(pt.LLMProfileID, pt.ActiveLLMProfileID, pt.LLMProfileIDs, pt.LLMChainRevision, pt.LLMFailoverState, pt.LLMFailoverReason)
 	}
 	m.mu.Unlock()
+	// 终态任务不重开额度阻塞意图:任务已经没有 worker 在跑,重开只会把它们从
+	// blocked 挪到 open——那里既没人执行,也不再满足「重跑意图」的可重跑条件,
+	// 反而变成死状态。终态任务想接着跑,走重跑意图/新增目标,那条路会把任务重新
+	// admit 回运行态。
+	if pgdb.IsTerminal(pt.Status) {
+		return 0, nil
+	}
 	if task, ok := m.Task(id); ok {
 		reopened, reopenErr := task.Store.ReopenIntentsByBlockedReason(pgdb.IntentBlockedLLMQuota)
 		if reopenErr != nil {

server/server.go

@@ -1511,10 +1511,8 @@ func (s *Server) updateTaskLLMProfiles(w http.ResponseWriter, r *http.Request) {
 		writeErr(w, 404, "task not found")
 		return
 	}
-	if isTerminalStatus(t.lifecycleSnapshot().Status) {
+	// 任何生命周期状态(含终态)都可以改链:任务结束后主 Agent 对话仍走这条链,
-		writeErr(w, 409, "已结束的任务不能修改 LLM 配置")
+	// 模型不可用时不换链就等于把已完成任务的交互一起锁死。
-		return
-	}
 	before := t.llmStateSnapshot()
 	var req struct {
 		LLMProfileIDs      []int64 `json:"llm_profile_ids"`
@@ -1534,11 +1532,7 @@ func (s *Server) updateTaskLLMProfiles(w http.ResponseWriter, r *http.Request) {
 	}
 	reopened, err := s.m.ReplaceTaskLLMProfiles(t.ID, req.LLMProfileIDs, active)
 	if err != nil {
-		if strings.Contains(err.Error(), "terminal") {
+		writeErr(w, 400, err.Error())
-			writeErr(w, 409, err.Error())
-		} else {
-			writeErr(w, 400, err.Error())
-		}
 		return
 	}
 	// Profile edits affect only subsequent LLM calls. Existing in-flight calls

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

@@ -77,8 +77,9 @@ function TaskLLMControl({ task, profiles, onUpdated }: { task: Task; profiles: L
 
   const chain = taskProfileIDs(task);
   const exhausted = task.llm_failover_state === "chain_exhausted";
+  // 任何状态都可以改链,终态也不例外:任务结束后主 Agent 对话仍走这条链,
+  // 链上模型出问题时必须能换掉,否则已完成任务就没法继续交互。
   const terminal = ["done", "failed", "timeout"].includes(task.status);
-  const editable = !terminal && (task.status === "running" || task.status === "paused" || exhausted);
   // A null active profile on an exhausted, non-empty chain is a persisted end
   // cursor. Keep the status display honest; choosing the first profile is only
   // the editor's reset draft and does not mean it is currently active.
@@ -94,9 +95,8 @@ function TaskLLMControl({ task, profiles, onUpdated }: { task: Task; profiles: L
   const currentTitle = [currentLabel, activeProfile?.model, backupCount > 0 ? `${backupCount} 个备用` : ""]
     .filter(Boolean)
     .join(" · ");
-  let editorDescription = "仅运行中、暂停或配置链耗尽的任务可以修改配置。";
+  let editorDescription = "调整顺序或当前配置后，将从下一次 LLM 调用开始生效。";
-  if (editable) editorDescription = "调整顺序或当前配置后，将从下一次 LLM 调用开始生效。";
+  if (terminal) editorDescription = "任务已结束，改动只影响后续的主 Agent 对话。";
-  if (terminal) editorDescription = "已结束的任务仅支持查看配置。";
   let saveLabel = "保存";
   if (exhausted) saveLabel = "保存并重置";
   if (saving) saveLabel = "保存中";
@@ -118,7 +118,6 @@ function TaskLLMControl({ task, profiles, onUpdated }: { task: Task; profiles: L
   };
 
   const save = async () => {
-    if (!editable) return;
     setSaving(true);
     try {
       const result = await api.updateTaskLLMProfiles(
@@ -181,7 +180,7 @@ function TaskLLMControl({ task, profiles, onUpdated }: { task: Task; profiles: L
           activeProfileId={activeProfileID}
           onActiveProfileChange={setActiveProfileID}
           inputId="task-llm-profiles"
-          disabled={!editable || saving}
+          disabled={saving}
           portalContainer={popoverContentRef}
         />
 
@@ -189,12 +188,10 @@ function TaskLLMControl({ task, profiles, onUpdated }: { task: Task; profiles: L
           <Button type="button" variant="outline" size="sm" onClick={() => setOpen(false)}>
             关闭
           </Button>
-          {editable && (
+          <Button type="button" size="sm" onClick={save} disabled={saving}>
-            <Button type="button" size="sm" onClick={save} disabled={saving}>
+            {saving && <Spinner data-icon="inline-start" />}
-              {saving && <Spinner data-icon="inline-start" />}
+            {saveLabel}
-              {saveLabel}
+          </Button>
-            </Button>
-          )}
         </div>
       </PopoverContent>
     </Popover>