feat: add shared validation for chainage and coordinates

src/app/(modules)/package/hooks/usePackageForm.ts

@@ -7,29 +7,25 @@ import { useForm, useWatch } from 'react-hook-form';
 import { toast } from 'sonner';
 import { z } from 'zod';
 
+import {
+  optionalIntegerNumber,
+  validateChainageRange,
+} from '@/lib/validation/numberField';
 import { packageService } from '@/services/api';
 import type { Package, PackageCreate, PackageUpdate } from '@/types';
 
 import { packageKeys } from '../queries/packageKeys';
 
-const optionalNumber = z.string().refine(
-  (value) => {
-    if (!value.trim()) {
-      return true;
-    }
-    return Number.isFinite(Number(value));
-  },
-  { message: 'Enter a valid number' },
-);
-
-const packageFormSchema = z.object({
-  id: z.string().optional(),
-  project_id: z.string().trim().min(1, 'Project is required'),
-  name: z.string().trim().min(1, 'Package name is required'),
-  region: z.string().optional(),
-  chainage_start_km: optionalNumber,
-  chainage_end_km: optionalNumber,
-});
+const packageFormSchema = z
+  .object({
+    id: z.string().optional(),
+    project_id: z.string().trim().min(1, 'Project is required'),
+    name: z.string().trim().min(1, 'Package name is required'),
+    region: z.string().optional(),
+    chainage_start_km: optionalIntegerNumber,
+    chainage_end_km: optionalIntegerNumber,
+  })
+  .superRefine(validateChainageRange);
 
 export type PackageFormValues = z.infer<typeof packageFormSchema>;