diff --git a/im/backend/internal/app/admin_ai_agents.go b/im/backend/internal/app/admin_ai_agents.go
index 1290579..1ace85e 100644
--- a/im/backend/internal/app/admin_ai_agents.go
+++ b/im/backend/internal/app/admin_ai_agents.go
@@ -33,8 +33,14 @@ func (a *App) adminAIAgents(w http.ResponseWriter, r *http.Request) {
 		fail(w, http.StatusBadRequest, 20001, err.Error())
 		return
 	}
-	if strings.TrimSpace(r.URL.Query().Get("managed")) == "1" {
+	// "0" is not the absence of a filter here: an account is unmanaged both when
+	// it has no binding at all and when its binding is switched off, and the
+	// operator looking for accounts to turn on wants to see both.
+	switch strings.TrimSpace(r.URL.Query().Get("managed")) {
+	case "1":
 		where += " AND g.user_id IS NOT NULL AND g.enabled=1"
+	case "0":
+		where += " AND (g.user_id IS NULL OR g.enabled=0)"
 	}
 	// Same keyword shape as the user list: nickname or 星遇号.
 	if keyword := strings.TrimSpace(r.URL.Query().Get("keyword")); keyword != "" {
diff --git a/im/backend/internal/app/ai_enqueue_integration_test.go b/im/backend/internal/app/ai_enqueue_integration_test.go
index ede95a8..ffcfb02 100644
--- a/im/backend/internal/app/ai_enqueue_integration_test.go
+++ b/im/backend/internal/app/ai_enqueue_integration_test.go
@@ -246,3 +246,63 @@ func TestAIReplyRetriesAfterReasoningExhaustsBudgetMySQL(t *testing.T) {
 		t.Fatalf("calls = %d, want 2", calls)
 	}
 }
+
+// The managed filter has three states, and "0" is a real one: an account is
+// unmanaged both when it was never bound and when its binding is switched off.
+func TestAdminAIAgentsManagedFilterMySQL(t *testing.T) {
+	db := isolatedIMDatabase(t)
+	a := &App{db: db, hub: NewHub(), config: Config{Environment: "development", JWTSecret: "isolated-im-regression-secret-only"}}
+	for _, statement := range []string{
+		`UPDATE users SET is_test=1,test_batch='regression' WHERE id IN (1,2,3)`,
+		`INSERT INTO ai_agents(user_id,model_id,enabled) VALUES(1,0,1),(2,0,0)`,
+	} {
+		if _, err := db.Exec(statement); err != nil {
+			t.Fatal(err)
+		}
+	}
+	list := func(query string) []int64 {
+		t.Helper()
+		var payload struct {
+			Items []struct {
+				UserID int64 `json:"userId"`
+			} `json:"items"`
+			Total int `json:"total"`
+		}
+		if err := json.Unmarshal(imTestCall(t, a.adminAIAgents, 1, "GET", "/admin/v1/ai/agents"+query, "", 200), &payload); err != nil {
+			t.Fatal(err)
+		}
+		ids := []int64{}
+		for _, item := range payload.Items {
+			ids = append(ids, item.UserID)
+		}
+		if payload.Total != len(ids) {
+			t.Fatalf("total=%d 与条目数 %d 不一致", payload.Total, len(ids))
+		}
+		return ids
+	}
+
+	if got := list("?managed=1"); len(got) != 1 || got[0] != 1 {
+		t.Fatalf("仅已托管 = %v, want [1]", got)
+	}
+	// Account 2 is bound but switched off, account 3 was never bound.
+	got := list("?managed=0")
+	if len(got) != 2 {
+		t.Fatalf("仅未托管 = %v, want 两个账号", got)
+	}
+	for _, want := range []int64{2, 3} {
+		found := false
+		for _, id := range got {
+			found = found || id == want
+		}
+		if !found {
+			t.Fatalf("仅未托管 = %v, 缺少 %d", got, want)
+		}
+	}
+	if all := list(""); len(all) != 3 {
+		t.Fatalf("全部账号 = %v, want 3 个", all)
+	}
+	// The two halves together are the whole list, with nothing counted twice.
+	if len(list("?managed=1"))+len(list("?managed=0")) != len(list("")) {
+		t.Fatal("两个筛选相加必须等于全部")
+	}
+}