fixxed color selector in the category settings and fixxed drag and drop

subtask

backend/src/routes/subtasks.ts

@@ -2,7 +2,7 @@ import { Router, Request, Response } from 'express';
 import { asyncHandler } from '../utils/asyncHandler';
 import { db } from '../db';
 import { subtasks, tasks } from '../db/schema';
-import { eq, and, asc, desc } from 'drizzle-orm';
+import { eq, and, asc, desc, isNull } from 'drizzle-orm';
 import { authMiddleware } from '../utils/auth';
 import { AppError } from '../middleware/errorHandler';
 import { subtaskCreateSchema, subtaskUpdateSchema } from '../utils/validation';
@@ -70,7 +70,7 @@ router.post('/task/:taskId', asyncHandler(async (req: Request, res: Response) =>
     .where(and(
       eq(subtasks.taskId, req.params.taskId), 
       eq(subtasks.userId, userId),
-      parentSubtaskId ? eq(subtasks.parentSubtaskId, parentSubtaskId) : eq(subtasks.parentSubtaskId, null)
+      parentSubtaskId ? eq(subtasks.parentSubtaskId, parentSubtaskId) : isNull(subtasks.parentSubtaskId)
     ))
     .orderBy(desc(subtasks.order))
     .limit(1);
@@ -117,7 +117,7 @@ router.patch('/:id', asyncHandler(async (req: Request, res: Response) => {
   const data = subtaskUpdateSchema.parse(req.body);
   const userId = req.user!.userId;
 
-  const existing = await db
+  const existing: any[] = await db
     .select()
     .from(subtasks)
     .where(and(eq(subtasks.id, req.params.id), eq(subtasks.userId, userId)))