refactor: remove all any types, add strict GraphQL scalar typing

- Add strictScalars: true to codegen.ts with proper scalar mappings
  (Date, Decimal, JSONString, JSON, UUID, BigInt → string/Record)
- Replace all ref<any[]> with proper GraphQL-derived types
- Add type guards for null filtering in arrays
- Fix bugs exposed by typing (locationLatitude vs latitude, etc.)
- Add interfaces for external components (MapboxSearchBox)

This enables end-to-end type safety from GraphQL schema to frontend.

app/pages/clientarea/kyc/russia.vue

@@ -57,24 +57,39 @@ const submitting = ref(false)
 const submitError = ref<string | null>(null)
 const submitSuccess = ref(false)
 
-const handleSubmit = async (formData: any) => {
+interface KycFormData {
+  company_name?: string
+  company_full_name?: string
+  inn?: string
+  kpp?: string
+  ogrn?: string
+  address?: string
+  bank_name?: string
+  bik?: string
+  correspondent_account?: string
+  contact_person?: string
+  contact_email?: string
+  contact_phone?: string
+}
+
+const handleSubmit = async (formData: KycFormData) => {
   try {
     submitting.value = true
     submitError.value = null
 
     const submitData = {
-      companyName: formData.company_name,
-      companyFullName: formData.company_full_name,
-      inn: formData.inn,
+      companyName: formData.company_name || '',
+      companyFullName: formData.company_full_name || '',
+      inn: formData.inn || '',
       kpp: formData.kpp || '',
       ogrn: formData.ogrn || '',
-      address: formData.address,
-      bankName: formData.bank_name,
-      bik: formData.bik,
+      address: formData.address || '',
+      bankName: formData.bank_name || '',
+      bik: formData.bik || '',
       correspondentAccount: formData.correspondent_account || '',
-      contactPerson: formData.contact_person,
-      contactEmail: formData.contact_email,
-      contactPhone: formData.contact_phone,
+      contactPerson: formData.contact_person || '',
+      contactEmail: formData.contact_email || '',
+      contactPhone: formData.contact_phone || '',
     }
 
     const result = await mutate(CreateKycApplicationRussiaDocument, { input: submitData }, 'user', 'kyc')
@@ -85,8 +100,8 @@ const handleSubmit = async (formData: any) => {
     } else {
       throw new Error(t('kycRussia.errors.create_failed'))
     }
-  } catch (err: any) {
-    submitError.value = err.message || t('kycRussia.errors.submit_failed')
+  } catch (err: unknown) {
+    submitError.value = err instanceof Error ? err.message : t('kycRussia.errors.submit_failed')
   } finally {
     submitting.value = false
   }