feat(tasks): 任务列表支持批量修改分类

勾选多个任务后可一次性移动到目标分类,或选「未分类」把它们移出当前分类。

- db: 新增 SetTasksCategory,在单个事务里校验分类存在性并 UPDATE ... WHERE
  id=ANY(...),返回真正被更新的 id 和刷新后的分类(含 task_count)。分类检查
  放在事务内,避免并发删除把 UPDATE 变成外键冲突。单批上限 100。
- server: 新增 POST /api/tasks/category/batch。写入原子,响应里的逐任务失败
  只可能是勾选后又被删掉的任务;顺带把 category_id 的解析(必填但可为 null)
  抽成 parseCategoryIDField 与单任务接口共用。
- server: 把批量 id 的 trim/归一/去重逻辑从 controlTasksBatch 抽成
  normalizeBatchTaskIDs,两个批量端点共用同一套重复判定。
- manager: SetTasksCategory 在 taskStateMu 内完成 DB 写入与运行中任务 DTO
  刷新,防止与单任务更新交错后留下过期的 category_name。
- web: 选中工具栏新增「修改分类」对话框(需确认目标,避免误点批量改动);
  「未分类」哨兵值统一提取为 UNCATEGORIZED_VALUE。

验证: go build / vet / gofmt、db 与 server 新增测试连本地 PG 实跑通过、
tsc --noEmit、biome check、next build 均通过。

CHANGELOG.md

@@ -4,6 +4,12 @@
 
 ## [Unreleased]
 
+### UI
+
+#### 新增的功能
+
+- 任务列表勾选多个任务后可批量修改分类，目标分类支持「未分类」以将任务移出当前分类；整批写入在一个事务内完成，失败项只会是勾选后已被删除的任务。
+
 ## [0.3.3] - 2026-08-23
 
 ### Worker

db/task_categories.go

@@ -13,6 +13,10 @@ import (
 
 const MaxTaskCategoryNameRunes = 80
 
+// MaxTaskCategoryBatchSize bounds one batch move so a single request cannot lock
+// an unbounded number of task rows.
+const MaxTaskCategoryBatchSize = 100
+
 var (
 	ErrTaskCategoryInvalid      = errors.New("invalid task category")
 	ErrTaskCategoryNameConflict = errors.New("task category name already exists")
@@ -199,3 +203,80 @@ FROM selected, updated`, taskID, *categoryID))
 	}
 	return &category, nil
 }
+
+// SetTasksCategory moves several tasks into one category (nil = uncategorized)
+// inside a single transaction, so a half-applied batch is never observable.
+// It returns the ids that were actually updated — ids missing from that slice
+// were deleted between selection and submit — plus the refreshed category row
+// whose task_count already reflects this move.
+func (d *DB) SetTasksCategory(taskIDs []int64, categoryID *int64) ([]int64, *TaskCategory, error) {
+	if len(taskIDs) == 0 {
+		return nil, nil, fmt.Errorf("%w: task ids are required", ErrTaskCategoryInvalid)
+	}
+	if len(taskIDs) > MaxTaskCategoryBatchSize {
+		return nil, nil, fmt.Errorf("%w: at most %d tasks per request", ErrTaskCategoryInvalid, MaxTaskCategoryBatchSize)
+	}
+	for _, id := range taskIDs {
+		if id <= 0 {
+			return nil, nil, fmt.Errorf("%w: task id must be positive", ErrTaskCategoryInvalid)
+		}
+	}
+	if categoryID != nil && *categoryID <= 0 {
+		return nil, nil, fmt.Errorf("%w: category id must be positive", ErrTaskCategoryInvalid)
+	}
+	tx, err := d.Begin()
+	if err != nil {
+		return nil, nil, err
+	}
+	defer tx.Rollback() //nolint:errcheck
+
+	// Checking the category inside the transaction keeps a concurrent delete from
+	// turning the UPDATE below into a foreign key violation.
+	if categoryID != nil {
+		var exists bool
+		if err := tx.QueryRow(`SELECT EXISTS(SELECT 1 FROM task_categories WHERE id=$1)`, *categoryID).Scan(&exists); err != nil {
+			return nil, nil, err
+		}
+		if !exists {
+			return nil, nil, ErrTaskCategoryNotFound
+		}
+	}
+	rows, err := tx.Query(`
+UPDATE tasks SET category_id=$2
+WHERE id=ANY($1::bigint[]) AND deleted_at IS NULL
+RETURNING id`, taskIDs, categoryID)
+	if err != nil {
+		return nil, nil, err
+	}
+	updated := make([]int64, 0, len(taskIDs))
+	for rows.Next() {
+		var id int64
+		if err := rows.Scan(&id); err != nil {
+			rows.Close()
+			return nil, nil, err
+		}
+		updated = append(updated, id)
+	}
+	rows.Close()
+	if err := rows.Err(); err != nil {
+		return nil, nil, err
+	}
+
+	var category *TaskCategory
+	if categoryID != nil {
+		fetched, err := scanTaskCategory(tx.QueryRow(`
+SELECT `+taskCategoryCols+`
+FROM task_categories category
+LEFT JOIN tasks task ON task.category_id=category.id
+WHERE category.id=$1
+GROUP BY category.id`, *categoryID))
+		if err != nil {
+			return nil, nil, err
+		}
+		category = &fetched
+	}
+	if err := tx.Commit(); err != nil {
+		return nil, nil, err
+	}
+	return updated, category, nil
+}

db/task_categories_test.go

@@ -89,3 +89,95 @@ func TestCreateTaskRejectsMissingCategoryAtomically(t *testing.T) {
 		t.Fatalf("failed create leaked %d exploration rows", count)
 	}
 }
+
+func TestSetTasksCategoryBatch(t *testing.T) {
+	d, err := Open(testDSN(t))
+	if err != nil {
+		t.Skipf("postgres unavailable (%v) - skipping", err)
+	}
+	defer d.Close()
+
+	stamp := time.Now().UnixNano()
+	category, err := d.CreateTaskCategory(fmt.Sprintf("Batch %d", stamp))
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _, _ = d.DeleteTaskCategory(category.ID) })
+
+	ids := make([]int64, 0, 3)
+	for i := range 3 {
+		task, err := d.CreateTaskWithOptions(fmt.Sprintf("batch-move-%d-%d", stamp, i), "goal", TaskCreateOptions{})
+		if err != nil {
+			t.Fatal(err)
+		}
+		t.Cleanup(func() { _ = d.DeleteTask(task.ID) })
+		ids = append(ids, task.ID)
+	}
+
+	// A deleted id must not abort the move for the surviving tasks; it is simply
+	// absent from the returned slice so the caller can report it.
+	missing := int64(1 << 62)
+	updated, moved, err := d.SetTasksCategory(append(append([]int64{}, ids...), missing), &category.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(updated) != len(ids) {
+		t.Fatalf("updated=%v, want the %d live ids only", updated, len(ids))
+	}
+	if moved == nil || moved.TaskCount != len(ids) {
+		t.Fatalf("category=%+v, want task_count=%d", moved, len(ids))
+	}
+	for _, id := range ids {
+		loaded, err := d.GetTask(id)
+		if err != nil || loaded.CategoryID == nil || *loaded.CategoryID != category.ID {
+			t.Fatalf("task %d not moved: %+v err=%v", id, loaded, err)
+		}
+	}
+
+	// A nil category clears the assignment for the whole batch.
+	updated, moved, err = d.SetTasksCategory(ids, nil)
+	if err != nil || len(updated) != len(ids) || moved != nil {
+		t.Fatalf("clear updated=%v category=%+v err=%v", updated, moved, err)
+	}
+	for _, id := range ids {
+		loaded, _ := d.GetTask(id)
+		if loaded.CategoryID != nil || loaded.CategoryName != "" {
+			t.Fatalf("task %d still categorized: %+v", id, loaded)
+		}
+	}
+}
+
+func TestSetTasksCategoryRejectsBadInputAtomically(t *testing.T) {
+	d, err := Open(testDSN(t))
+	if err != nil {
+		t.Skipf("postgres unavailable (%v) - skipping", err)
+	}
+	defer d.Close()
+
+	stamp := time.Now().UnixNano()
+	task, err := d.CreateTaskWithOptions(fmt.Sprintf("batch-reject-%d", stamp), "goal", TaskCreateOptions{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { _ = d.DeleteTask(task.ID) })
+
+	missingCategory := int64(1 << 62)
+	if _, _, err := d.SetTasksCategory([]int64{task.ID}, &missingCategory); !errors.Is(err, ErrTaskCategoryNotFound) {
+		t.Fatalf("missing category error=%v, want %v", err, ErrTaskCategoryNotFound)
+	}
+	if _, _, err := d.SetTasksCategory(nil, nil); !errors.Is(err, ErrTaskCategoryInvalid) {
+		t.Fatalf("empty ids error=%v, want %v", err, ErrTaskCategoryInvalid)
+	}
+	oversized := make([]int64, MaxTaskCategoryBatchSize+1)
+	for i := range oversized {
+		oversized[i] = task.ID
+	}
+	if _, _, err := d.SetTasksCategory(oversized, nil); !errors.Is(err, ErrTaskCategoryInvalid) {
+		t.Fatalf("oversized error=%v, want %v", err, ErrTaskCategoryInvalid)
+	}
+	// The rejected calls must leave the task untouched.
+	loaded, _ := d.GetTask(task.ID)
+	if loaded.CategoryID != nil {
+		t.Fatalf("rejected batch mutated task: %+v", loaded)
+	}
+}

server/manager.go

@@ -812,6 +812,49 @@ func (m *Manager) SetTaskCategory(taskID string, categoryID *int64) (*pgdb.TaskC
 	return category, nil
 }
 
+// SetTasksCategory applies one category change to several tasks at once. The
+// database write and the in-memory refresh share taskStateMu, so a concurrent
+// single-task update cannot interleave and leave a live DTO stale. The returned
+// set holds the ids that were actually moved; callers report the rest as gone.
+func (m *Manager) SetTasksCategory(taskIDs []string, categoryID *int64) (map[string]bool, *pgdb.TaskCategory, error) {
+	m.taskStateMu.Lock()
+	defer m.taskStateMu.Unlock()
+	numeric := make([]int64, 0, len(taskIDs))
+	for _, taskID := range taskIDs {
+		id, err := strconv.ParseInt(taskID, 10, 64)
+		if err != nil || id <= 0 {
+			return nil, nil, pgdb.ErrTaskCategoryTaskNotFound
+		}
+		numeric = append(numeric, id)
+	}
+	updatedIDs, category, err := m.pg.SetTasksCategory(numeric, categoryID)
+	if err != nil {
+		return nil, nil, err
+	}
+	categoryName := ""
+	if category != nil {
+		categoryName = category.Name
+	}
+	updated := make(map[string]bool, len(updatedIDs))
+	m.mu.RLock()
+	tasks := make([]*Task, 0, len(updatedIDs))
+	for _, id := range updatedIDs {
+		taskID := strconv.FormatInt(id, 10)
+		updated[taskID] = true
+		if task := m.tasks[taskID]; task != nil {
+			tasks = append(tasks, task)
+		}
+	}
+	m.mu.RUnlock()
+	for _, task := range tasks {
+		task.updateLifecycle(func(state *taskLifecycleState) {
+			state.CategoryID = cloneInt64Ptr(categoryID)
+			state.CategoryName = categoryName
+		})
+	}
+	return updated, category, nil
+}
+
 // DeleteCompanyWithAssets keeps the database cascade and live task handles in
 // one manager-level critical section. This closes the gap where a task could
 // commit its company scope immediately before registration and miss the

server/server.go

@@ -650,6 +650,7 @@ func (s *Server) Handler() http.Handler {
 	mux.HandleFunc("POST /api/task-categories", s.pgCreateTaskCategory)
 	mux.HandleFunc("PATCH /api/task-categories/{id}", s.pgRenameTaskCategory)
 	mux.HandleFunc("DELETE /api/task-categories/{id}", s.pgDeleteTaskCategory)
+	mux.HandleFunc("POST /api/tasks/category/batch", s.updateTasksCategoryBatch)
 	mux.HandleFunc("GET /api/task-templates", s.pgListTaskTemplates)
 	mux.HandleFunc("POST /api/task-templates", s.pgCreateTaskTemplate)
 	mux.HandleFunc("PATCH /api/task-templates/{id}", s.pgUpdateTaskTemplate)

server/task_categories.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"errors"
+	"fmt"
 	"net/http"
 	"strings"
 	"unicode/utf8"
@@ -119,6 +120,26 @@ func (s *Server) pgDeleteTaskCategory(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, http.StatusOK, map[string]any{"deleted": id})
 }
 
+// parseCategoryIDField reads the category_id field shared by the single-task and
+// batch endpoints. The field is required but may be null — that clears the
+// category — so it arrives as RawMessage instead of *int64, which cannot tell
+// an explicit null from an omitted key.
+func parseCategoryIDField(w http.ResponseWriter, raw json.RawMessage) (*int64, bool) {
+	if len(raw) == 0 {
+		writeErr(w, http.StatusBadRequest, "category_id is required")
+		return nil, false
+	}
+	if bytes.Equal(bytes.TrimSpace(raw), []byte("null")) {
+		return nil, true
+	}
+	var id int64
+	if err := json.Unmarshal(raw, &id); err != nil || id <= 0 {
+		writeErr(w, http.StatusBadRequest, "任务分类 id 无效")
+		return nil, false
+	}
+	return &id, true
+}
+
 func (s *Server) updateTaskCategory(w http.ResponseWriter, r *http.Request) {
 	taskID := r.PathValue("id")
 	if _, ok := s.m.Task(taskID); !ok {
@@ -133,21 +154,8 @@ func (s *Server) updateTaskCategory(w http.ResponseWriter, r *http.Request) {
 		writeErr(w, http.StatusBadRequest, err.Error())
 		return
 	}
-	if len(request.CategoryID) == 0 {
-		writeErr(w, http.StatusBadRequest, "category_id is required")
-		return
-	}
-	var categoryID *int64
-	if !bytes.Equal(bytes.TrimSpace(request.CategoryID), []byte("null")) {
-		var id int64
-		if err := json.Unmarshal(request.CategoryID, &id); err != nil {
-			writeErr(w, http.StatusBadRequest, "任务分类 id 无效")
-			return
-		}
-		categoryID = &id
-	}
-	if categoryID != nil && *categoryID <= 0 {
-		writeErr(w, http.StatusBadRequest, "任务分类 id 无效")
+	categoryID, ok := parseCategoryIDField(w, request.CategoryID)
+	if !ok {
 		return
 	}
 	if _, err := s.m.SetTaskCategory(taskID, categoryID); err != nil {
@@ -157,3 +165,77 @@ func (s *Server) updateTaskCategory(w http.ResponseWriter, r *http.Request) {
 	task, _ := s.m.Task(taskID)
 	writeJSON(w, http.StatusOK, taskDTO(task, s.resolvedTaskStatus(task)))
 }
+
+// batchCategoryItem reports one requested task. Unlike batch pause/resume there
+// is no per-task runtime outcome, so only the failure reason is carried.
+type batchCategoryItem struct {
+	ID    string `json:"id"`
+	OK    bool   `json:"ok"`
+	Error string `json:"error,omitempty"`
+}
+
+// updateTasksCategoryBatch moves every selected task into one category, or
+// clears it when category_id is null. The database write is atomic; per-task
+// entries only distinguish ids that never resolved to a live task, so a partial
+// success here means those tasks were deleted, not that the move half-applied.
+func (s *Server) updateTasksCategoryBatch(w http.ResponseWriter, r *http.Request) {
+	r.Body = http.MaxBytesReader(w, r.Body, maxTaskCategoryRequestBytes)
+	var request struct {
+		TaskIDs    []string        `json:"task_ids"`
+		CategoryID json.RawMessage `json:"category_id"`
+	}
+	if err := decode(r, &request); err != nil {
+		var tooLarge *http.MaxBytesError
+		if errors.As(err, &tooLarge) {
+			writeErr(w, http.StatusRequestEntityTooLarge, "请求正文过大")
+		} else {
+			writeErr(w, http.StatusBadRequest, err.Error())
+		}
+		return
+	}
+	categoryID, ok := parseCategoryIDField(w, request.CategoryID)
+	if !ok {
+		return
+	}
+	taskIDs := normalizeBatchTaskIDs(request.TaskIDs)
+	if len(taskIDs) == 0 || len(taskIDs) > db.MaxTaskCategoryBatchSize {
+		writeErr(w, http.StatusBadRequest, fmt.Sprintf("task_ids 数量必须为 1-%d", db.MaxTaskCategoryBatchSize))
+		return
+	}
+	items := make([]batchCategoryItem, 0, len(taskIDs))
+	pending := make([]string, 0, len(taskIDs))
+	for _, parsed := range taskIDs {
+		item := batchCategoryItem{ID: parsed.id}
+		switch {
+		case !parsed.valid:
+			item.Error = "bad task id"
+		default:
+			if _, live := s.m.Task(parsed.id); live {
+				pending = append(pending, parsed.id)
+			} else {
+				item.Error = "task not found"
+			}
+		}
+		items = append(items, item)
+	}
+	var category *db.TaskCategory
+	if len(pending) > 0 {
+		updated, moved, err := s.m.SetTasksCategory(pending, categoryID)
+		if err != nil {
+			writeTaskCategoryError(w, err)
+			return
+		}
+		category = moved
+		for i := range items {
+			if items[i].Error != "" {
+				continue
+			}
+			if updated[items[i].ID] {
+				items[i].OK = true
+			} else {
+				items[i].Error = "task not found"
+			}
+		}
+	}
+	writeJSON(w, http.StatusOK, map[string]any{"items": items, "category": category})
+}

server/task_categories_test.go

@@ -0,0 +1,84 @@
+package server
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+// TestTaskCategoryBatchRoute pins the contract of the batch move endpoint: it is
+// registered ahead of the /api/tasks/{id}/... patterns, it validates the request
+// before touching the database, and it reports unknown ids per task instead of
+// failing the whole batch.
+func TestTaskCategoryBatchRoute(t *testing.T) {
+	m, err := NewManager(t.TempDir(), "")
+	if err != nil {
+		t.Skipf("postgres unavailable (%v) - skipping", err)
+	}
+	defer m.Close()
+
+	td := t.TempDir()
+	s := New(context.Background(), m, td, td, td)
+	h := s.Handler()
+	token, err := signJWT(s.jwtKey)
+	if err != nil {
+		t.Fatalf("sign jwt: %v", err)
+	}
+
+	post := func(body string) *httptest.ResponseRecorder {
+		req := httptest.NewRequest(http.MethodPost, "/api/tasks/category/batch", strings.NewReader(body))
+		req.Header.Set("Authorization", "Bearer "+token)
+		req.Header.Set("Content-Type", "application/json")
+		rec := httptest.NewRecorder()
+		h.ServeHTTP(rec, req)
+		return rec
+	}
+
+	// category_id is required, and omitting it must not be read as "uncategorize".
+	if rec := post(`{"task_ids":["1"]}`); rec.Code != http.StatusBadRequest ||
+		!strings.Contains(rec.Body.String(), "category_id is required") {
+		t.Fatalf("missing category_id: status=%d body=%s", rec.Code, rec.Body.String())
+	}
+
+	// An empty selection is rejected before any database work.
+	if rec := post(`{"task_ids":[],"category_id":null}`); rec.Code != http.StatusBadRequest ||
+		!strings.Contains(rec.Body.String(), "task_ids 数量必须为") {
+		t.Fatalf("empty task_ids: status=%d body=%s", rec.Code, rec.Body.String())
+	}
+
+	// Unknown and malformed ids come back as per-task failures on a 200, so the
+	// caller can tell exactly which selections went stale.
+	rec := post(`{"task_ids":["999999999","abc","999999999"],"category_id":null}`)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("batch status=%d body=%s", rec.Code, rec.Body.String())
+	}
+	var response struct {
+		Items []struct {
+			ID    string `json:"id"`
+			OK    bool   `json:"ok"`
+			Error string `json:"error"`
+		} `json:"items"`
+		Category *struct {
+			ID int64 `json:"id"`
+		} `json:"category"`
+	}
+	if err := json.Unmarshal(rec.Body.Bytes(), &response); err != nil {
+		t.Fatalf("decode: %v body=%s", err, rec.Body.String())
+	}
+	// The duplicate id is collapsed, so two entries remain.
+	if len(response.Items) != 2 {
+		t.Fatalf("items=%+v, want 2 after de-duplication", response.Items)
+	}
+	if response.Items[0].ID != "999999999" || response.Items[0].OK || response.Items[0].Error != "task not found" {
+		t.Fatalf("unknown id entry=%+v", response.Items[0])
+	}
+	if response.Items[1].ID != "abc" || response.Items[1].OK || response.Items[1].Error != "bad task id" {
+		t.Fatalf("malformed id entry=%+v", response.Items[1])
+	}
+	if response.Category != nil {
+		t.Fatalf("category=%+v, want null when clearing", response.Category)
+	}
+}

server/task_control.go

@@ -27,6 +27,40 @@ type intentControlResult struct {
 	Deleted *db.IntentCleanup `json:"deleted,omitempty"`
 }
 
+// parsedTaskID carries one requested batch id together with whether it parsed.
+// Invalid ids are kept rather than dropped so the response can name them.
+type parsedTaskID struct {
+	id    string
+	valid bool
+}
+
+// normalizeBatchTaskIDs trims, canonicalizes and de-duplicates the ids of one
+// batch request while preserving the caller's order. Shared by every batch
+// endpoint so they agree on what counts as a duplicate.
+func normalizeBatchTaskIDs(raw []string) []parsedTaskID {
+	seen := map[string]bool{}
+	seenInvalid := map[string]bool{}
+	taskIDs := make([]parsedTaskID, 0, len(raw))
+	for _, item := range raw {
+		trimmed := strings.TrimSpace(item)
+		id, valid := canonicalTaskID(trimmed)
+		if !valid {
+			if seenInvalid[trimmed] {
+				continue
+			}
+			seenInvalid[trimmed] = true
+			taskIDs = append(taskIDs, parsedTaskID{id: trimmed})
+			continue
+		}
+		if seen[id] {
+			continue
+		}
+		seen[id] = true
+		taskIDs = append(taskIDs, parsedTaskID{id: id, valid: true})
+	}
+	return taskIDs
+}
+
 type batchControlItem struct {
 	ID     string `json:"id"`
 	OK     bool   `json:"ok"`
@@ -192,30 +226,7 @@ func (s *Server) controlTasksBatch(w http.ResponseWriter, r *http.Request) {
 		writeErr(w, 400, "action must be pause|resume")
 		return
 	}
-	type parsedTaskID struct {
-		id    string
-		valid bool
-	}
-	seen := map[string]bool{}
-	seenInvalid := map[string]bool{}
-	taskIDs := make([]parsedTaskID, 0, len(req.TaskIDs))
-	for _, raw := range req.TaskIDs {
-		trimmed := strings.TrimSpace(raw)
-		id, valid := canonicalTaskID(trimmed)
-		if !valid {
-			if seenInvalid[trimmed] {
-				continue
-			}
-			seenInvalid[trimmed] = true
-			taskIDs = append(taskIDs, parsedTaskID{id: trimmed})
-			continue
-		}
-		if seen[id] {
-			continue
-		}
-		seen[id] = true
-		taskIDs = append(taskIDs, parsedTaskID{id: id, valid: true})
-	}
+	taskIDs := normalizeBatchTaskIDs(req.TaskIDs)
 	if len(taskIDs) == 0 || len(taskIDs) > maxBatchControlIDs {
 		writeErr(w, 400, fmt.Sprintf("task_ids 数量必须为 1-%d", maxBatchControlIDs))
 		return

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

@@ -8,6 +8,7 @@ import {
   CheckIcon,
   ChevronRightIcon,
   EyeIcon,
+  FolderInputIcon,
   FolderKanbanIcon,
   Loader2Icon,
   PaperclipIcon,
@@ -203,6 +204,10 @@ const STATUS_OPTIONS: { value: TaskStatus; label: string }[] = [
   { value: "timeout", label: "已超时" },
 ];
 
+// Select 不接受空字符串 value,所以「无分类」在筛选器、新建表单和批量移动里
+// 统一用这个哨兵值,提交时再翻译成后端的 null。
+const UNCATEGORIZED_VALUE = "uncategorized";
+
 // 可暂停 = 非终态且未暂停,与后端 applyTaskControlWithCause 的门控一致
 // (done/failed/timeout 为终态);paused 才可继续。行内按钮与批量控制共用此判断,
 // 两边不会出现一个可点、另一个不可点的分歧。
@@ -224,13 +229,18 @@ export default function TasksPage() {
   const [pageSize, setPageSize] = React.useState(20);
   const [nowSec, setNowSec] = React.useState(() => Math.floor(Date.now() / 1000));
   const [batchControlling, setBatchControlling] = React.useState<"pause" | "resume" | null>(null);
+  const [movingCategory, setMovingCategory] = React.useState(false);
 
   const filtered = React.useMemo(() => {
     const q = query.trim().toLowerCase();
     return tasks.filter((t) => {
       if (statusFilter !== "all" && t.status !== statusFilter) return false;
-      if (categoryFilter === "uncategorized" && t.category_id != null) return false;
-      if (categoryFilter !== "all" && categoryFilter !== "uncategorized" && String(t.category_id) !== categoryFilter)
+      if (categoryFilter === UNCATEGORIZED_VALUE && t.category_id != null) return false;
+      if (
+        categoryFilter !== "all" &&
+        categoryFilter !== UNCATEGORIZED_VALUE &&
+        String(t.category_id) !== categoryFilter
+      )
         return false;
       if (!q) return true;
       return (
@@ -344,7 +354,7 @@ export default function TasksPage() {
   }, [load, loadCategories]);
 
   React.useEffect(() => {
-    if (categoryFilter === "all" || categoryFilter === "uncategorized") return;
+    if (categoryFilter === "all" || categoryFilter === UNCATEGORIZED_VALUE) return;
     if (!categories.some((category) => String(category.id) === categoryFilter)) setCategoryFilter("all");
   }, [categories, categoryFilter]);
 
@@ -505,6 +515,42 @@ export default function TasksPage() {
     [batchControlling, load],
   );
 
+  // 后端把整批分类写入放在一个事务里，所以失败项只可能是勾选后又被删掉的任务。
+  const moveSelectedTasksCategory = React.useCallback(
+    async (categoryID?: number) => {
+      const ids = [...selectedIds];
+      if (ids.length === 0 || movingCategory) return;
+      if (ids.length > 100) {
+        toast.error("一次最多修改 100 个任务的分类");
+        return;
+      }
+      setMovingCategory(true);
+      try {
+        const result = await api.updateTasksCategory(ids, categoryID);
+        const succeeded = result.items.filter((item) => item.ok);
+        const failed = result.items.filter((item) => !item.ok);
+        const target = result.category?.name ?? "未分类";
+        if (succeeded.length > 0) {
+          toast.success(`已将 ${succeeded.length} 个任务移动到「${target}」`);
+          setSelectedIds(new Set());
+        }
+        if (failed.length > 0) {
+          const details = failed
+            .slice(0, 3)
+            .map((item) => `#${item.id}（${item.error || "任务已不存在"}）`)
+            .join("；");
+          toast.error(`${failed.length} 个任务未能移动：${details}${failed.length > 3 ? " 等" : ""}`);
+        }
+        refreshCategoriesAndTasks();
+      } catch (error) {
+        toast.error(`修改分类失败：${(error as Error).message}`);
+      } finally {
+        setMovingCategory(false);
+      }
+    },
+    [movingCategory, refreshCategoriesAndTasks, selectedIds],
+  );
+
   return (
     <Card>
       <CardContent className="flex flex-col gap-4 px-0 pt-6">
@@ -550,7 +596,7 @@ export default function TasksPage() {
             <SelectContent>
               <SelectGroup>
                 <SelectItem value="all">全部分类</SelectItem>
-                <SelectItem value="uncategorized">未分类</SelectItem>
+                <SelectItem value={UNCATEGORIZED_VALUE}>未分类</SelectItem>
                 {categories.map((category) => (
                   <SelectItem key={category.id} value={String(category.id)}>
                     {category.name}
@@ -598,6 +644,12 @@ export default function TasksPage() {
                   继续 {resumableTaskIDs.length}
                 </Button>
               )}
+              <MoveTasksCategoryDialog
+                categories={categories}
+                count={selectedIds.size}
+                moving={movingCategory}
+                onMove={moveSelectedTasksCategory}
+              />
               <BulkDeleteTasksDialog ids={[...selectedIds]} onDelete={deleteTasks} />
             </>
           )}
@@ -1112,6 +1164,81 @@ function DeleteTaskDialog({
 // BulkDeleteTasksDialog deletes every checked task with one shared set of cleanup options.
 // The backend has no batch endpoint, so deletion runs one task at a time (see deleteTasks)
 // and the button shows live progress.
+// MoveTasksCategoryDialog confirms a target before applying, so a mis-click on a
+// large selection cannot silently re-file every task. UNCATEGORIZED_VALUE stands
+// in for "no category" because Select rejects an empty string value.
+function MoveTasksCategoryDialog({
+  categories,
+  count,
+  moving,
+  onMove,
+}: {
+  categories: TaskCategory[];
+  count: number;
+  moving: boolean;
+  onMove: (categoryID?: number) => Promise<void>;
+}) {
+  const [open, setOpen] = React.useState(false);
+  const [target, setTarget] = React.useState(UNCATEGORIZED_VALUE);
+
+  const handleOpenChange = (next: boolean) => {
+    if (moving) return;
+    setOpen(next);
+    if (next) setTarget(UNCATEGORIZED_VALUE);
+  };
+
+  return (
+    <Dialog open={open} onOpenChange={handleOpenChange}>
+      <DialogTrigger asChild>
+        <Button size="sm" variant="outline">
+          <FolderInputIcon data-icon="inline-start" /> 修改分类
+        </Button>
+      </DialogTrigger>
+      <DialogContent>
+        <DialogHeader>
+          <DialogTitle>修改所选 {count} 个任务的分类</DialogTitle>
+          <DialogDescription>目标分类对所选任务统一生效；选「未分类」会把它们移出当前分类。</DialogDescription>
+        </DialogHeader>
+        <Field>
+          <FieldLabel htmlFor="bulk-category">目标分类</FieldLabel>
+          <Select value={target} onValueChange={setTarget} disabled={moving}>
+            <SelectTrigger id="bulk-category" className="w-full">
+              <SelectValue placeholder="选择分类" />
+            </SelectTrigger>
+            <SelectContent>
+              <SelectGroup>
+                <SelectItem value={UNCATEGORIZED_VALUE}>未分类</SelectItem>
+                {categories.map((category) => (
+                  <SelectItem key={category.id} value={String(category.id)}>
+                    {category.name}
+                  </SelectItem>
+                ))}
+              </SelectGroup>
+            </SelectContent>
+          </Select>
+          {categories.length === 0 && <FieldDescription>还没有任何分类，先用「分类管理」创建一个。</FieldDescription>}
+        </Field>
+        <DialogFooter>
+          <DialogClose asChild>
+            <Button variant="outline" disabled={moving}>
+              取消
+            </Button>
+          </DialogClose>
+          <Button
+            disabled={moving}
+            onClick={() => {
+              void onMove(target === UNCATEGORIZED_VALUE ? undefined : Number(target)).then(() => setOpen(false));
+            }}
+          >
+            {moving && <Spinner data-icon="inline-start" />}
+            移动
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}
+
 function BulkDeleteTasksDialog({
   ids,
   onDelete,
@@ -1527,7 +1654,7 @@ function CreateTaskSheet({
 }) {
   const [open, setOpen] = React.useState(false);
   const [name, setName] = React.useState("");
-  const [categoryID, setCategoryID] = React.useState("uncategorized");
+  const [categoryID, setCategoryID] = React.useState(UNCATEGORIZED_VALUE);
   const [description, setDescription] = React.useState("");
   const [goal, setGoal] = React.useState("");
   const [selectedTemplateID, setSelectedTemplateID] = React.useState<number | null>(null);
@@ -1597,7 +1724,7 @@ function CreateTaskSheet({
       const heartbeatSec = Math.max(10, Math.floor(Number(heartbeatMin) || 10)) * 60; // 下限 10min，与后端归一一致
       await api.createTask({
         name: name.trim(),
-        categoryId: categoryID === "uncategorized" ? undefined : Number(categoryID),
+        categoryId: categoryID === UNCATEGORIZED_VALUE ? undefined : Number(categoryID),
         description: description.trim(),
         goal: goal.trim(),
         llmProfileIds: llmProfileIDs.map(Number),
@@ -1610,7 +1737,7 @@ function CreateTaskSheet({
       });
       toast.success("任务已创建");
       setName("");
-      setCategoryID("uncategorized");
+      setCategoryID(UNCATEGORIZED_VALUE);
       setDescription("");
       setGoal("");
       setSelectedTemplateID(null);
@@ -1682,7 +1809,7 @@ function CreateTaskSheet({
                 </SelectTrigger>
                 <SelectContent>
                   <SelectGroup>
-                    <SelectItem value="uncategorized">未分类</SelectItem>
+                    <SelectItem value={UNCATEGORIZED_VALUE}>未分类</SelectItem>
                     {categories.map((category) => (
                       <SelectItem key={category.id} value={String(category.id)}>
                         {category.name}

web/src/lib/api.ts

@@ -12,6 +12,7 @@ import type {
   AgentTrigger,
   Asset,
   Audit,
+  BatchCategoryItem,
   BatchControlItem,
   ChatAttachment,
   CommandRecord,
@@ -218,6 +219,12 @@ export const api = {
   deleteTaskCategory: (id: number) => del<{ deleted: number }>(`/task-categories/${id}`),
   updateTaskCategory: (taskId: string, categoryId?: number) =>
     patch<Task>(`/tasks/${taskId}/category`, { category_id: categoryId ?? null }),
+  // categoryId 省略/undefined = 移出分类（后端收到 null）
+  updateTasksCategory: (taskIds: string[], categoryId?: number) =>
+    post<{ items: BatchCategoryItem[]; category: TaskCategory | null }>("/tasks/category/batch", {
+      task_ids: taskIds,
+      category_id: categoryId ?? null,
+    }),
   taskTemplates: () => get<{ templates: TaskTemplate[] }>("/task-templates").then((r) => arr(r.templates)),
   createTaskTemplate: (input: Pick<TaskTemplate, "name" | "description" | "goal">) =>
     post<TaskTemplate>("/task-templates", input),

web/src/lib/mock/handler.ts

@@ -356,6 +356,25 @@ function route(m: string, path: string, seg: string[], q: URLSearchParams, b: Re
     }
     return { deleted: categoryID };
   }
+  if (path === "/tasks/category/batch" && m === "POST") {
+    const requested = Array.isArray(b.task_ids) ? b.task_ids.map(String) : [];
+    const taskIDs = [...new Set(requested)];
+    if (taskIDs.length === 0 || taskIDs.length > 100) throw new Error("task_ids 数量必须为 1-100");
+    const categoryID = typeof b.category_id === "number" ? b.category_id : undefined;
+    const category = categoryID === undefined ? undefined : mockTaskCategories.find((item) => item.id === categoryID);
+    if (categoryID !== undefined && !category) throw new Error("任务分类不存在");
+    const items = taskIDs.map((id) => {
+      const task = mockTasks.find((item) => item.id === id);
+      if (!task) return { id, ok: false, error: "task not found" };
+      task.category_id = category?.id;
+      task.category_name = category?.name;
+      return { id, ok: true };
+    });
+    return {
+      items,
+      category: category ? mockTaskCategorySnapshot().find((item) => item.id === category.id) : null,
+    };
+  }
   if (seg[0] === "tasks" && seg[2] === "category" && seg.length === 3 && m === "PATCH") {
     const task = mockTasks.find((item) => item.id === seg[1]);
     if (!task) throw new Error("任务不存在");

web/src/lib/types.ts

@@ -624,6 +624,13 @@ export interface BatchControlItem {
   error?: string;
 }
 
+// 批量改分类的逐任务结果。失败只可能是任务已被删除，分类本身的写入是原子的。
+export interface BatchCategoryItem {
+  id: string;
+  ok: boolean;
+  error?: string;
+}
+
 // Whole-task (all agents) token aggregate.
 export interface TokenTotal {
   input_tokens: number;