fix(kanban): dispatch task updated event when task position is updated

This fixes a bug where a task would not be indexed in Typesense when its position changed.

pkg/models/task_position.go

@@ -20,6 +20,8 @@ import (
 	"math"
 
 	"code.vikunja.io/api/pkg/events"
+	"code.vikunja.io/api/pkg/user"
+
 	"code.vikunja.io/web"
 	"xorm.io/xorm"
 )
@@ -108,7 +110,16 @@ func (tp *TaskPosition) Update(s *xorm.Session, a web.Auth) (err error) {
 		return RecalculateTaskPositions(s, view, a)
 	}
 
-	return
+	task, err := GetTaskByIDSimple(s, tp.TaskID)
+	if err != nil {
+		return
+	}
+
+	doer, _ := user.GetFromAuth(a)
+	return events.Dispatch(&TaskUpdatedEvent{
+		Task: &task,
+		Doer: doer,
+	})
 }
 
 func RecalculateTaskPositions(s *xorm.Session, view *ProjectView, a web.Auth) (err error) {