feat: add shared validation for chainage and coordinates

src/app/(modules)/project/hooks/useProjectForm.ts

@@ -7,30 +7,24 @@ import { useForm, useWatch } from 'react-hook-form';
 import { toast } from 'sonner';
 import { z } from 'zod';
 
+import {
+  optionalLatitude,
+  optionalLongitude,
+} from '@/lib/validation/numberField';
 import { projectService } from '@/services/api';
 import type { Project, ProjectCreate, ProjectUpdate } from '@/types';
 
 import { projectKeys } from '../queries/projectKeys';
 
-const optionalCoordinate = z.string().refine(
-  (value) => {
-    if (!value.trim()) {
-      return true;
-    }
-    return Number.isFinite(Number(value));
-  },
-  { message: 'Enter a valid number' },
-);
-
 const projectFormSchema = z.object({
   id: z.string().optional(),
   name: z.string().trim().min(1, 'Project name is required'),
   state: z.string().optional(),
   corridor_name: z.string().optional(),
-  start_lat: optionalCoordinate,
-  start_lng: optionalCoordinate,
-  end_lat: optionalCoordinate,
-  end_lng: optionalCoordinate,
+  start_lat: optionalLatitude,
+  start_lng: optionalLongitude,
+  end_lat: optionalLatitude,
+  end_lng: optionalLongitude,
 });
 
 export type ProjectFormValues = z.infer<typeof projectFormSchema>;