fix: remove dead code, add ZodError handling, fix NaN pagination, add like routes, fix schemesCount sync

src/routes/schemes.ts

@@ -19,7 +19,9 @@ router.get('/', optionalAuth, async (req: Request, res: Response) => {
       sort = 'newest',
     } = req.query;
     
-    const skip = (Number(page) - 1) * Number(limit);
+    const pageNum = Math.max(1, parseInt(String(page)) || 1);
+    const limitNum = Math.min(100, Math.max(1, parseInt(String(limit)) || 20));
+    const skip = (pageNum - 1) * limitNum;
     
     const where: any = { status: 'PUBLISHED' };
     if (weapon) where.weaponName = { contains: String(weapon) };
@@ -219,6 +221,11 @@ router.delete('/:id', authMiddleware, async (req: Request, res: Response) => {
       data: { status: 'DELETED' },
     });
     
+    await prisma.user.update({
+      where: { id: req.user!.userId },
+      data: { schemesCount: { decrement: 1 } },
+    });
+    
     res.json({
       success: true,
       message: '方案已删除',