refactor(forms): use arktype schemas for form validation

Replaces imperative validate() blocks in TransactionCreate, signup,
and AccountNew with schema-driven validation. Drops the dead
"(!currency && !date && payFor.length === 0)" branch in
TransactionCreate that was hiding behind the generic error.

src/components/TransactionCreate.vue

@@ -14,11 +14,12 @@ import TransactionType from '@/enums/TransactionType'
 import TransactionTag, { TransactionTagLabel } from '@/enums/TransactionTag'
 import exchangeService from '@/services/ExchangeService'
 import transactionService from '@/services/TransactionService'
-import queueNotifService from '@/services/QueueNotifService'
 import mapService from '@/services/MapService'
 import { money } from '@/utils/format'
 import { findContrastColor } from '@/utils'
 import notif from '@/utils/notif'
+import { validateAndNotify } from '@/utils/validate'
+import { transactionFormSchema, MAX_TRANSACTION_AMOUNT } from '@/schemas/transaction'
 import FabButton from '@/components/FabButton.vue'
 import TransactionSplit from '@/components/TransactionSplit.vue'
 import TransactionTagUpdate from '@/components/TransactionTagUpdate.vue'
@@ -46,7 +47,7 @@ const date = ref(today)
 const currency = ref<ICurrency | null>(null)
 const payBy = ref('')
 const payFor = reactive<ISplit[]>([])
-const maxAmount = 1_000_000
+const maxAmount = MAX_TRANSACTION_AMOUNT
 const displayLocationModal = ref(false)
 const isSetLocation = ref(false)
 const location = ref<ILocation | null>(null)
@@ -120,23 +121,12 @@ const validLocation = async () => {
 const validate = (): boolean => {
   const el = document.querySelector(':focus') as HTMLInputElement | null
   el?.blur()
-  if (!name.value || !amount.value || !payBy.value || (!currency.value && !date.value && payFor.length === 0)) {
-    if (amount.value === 0) {
-      queueNotifService.error('Le montant doit être supérieur à 0.')
-    } else {
-      queueNotifService.error('Tous les champs sont requis.')
-    }
-    return false
-  }
-  if (isNaN(amount.value) || amount.value > maxAmount) {
-    queueNotifService.error(`Veuillez saisir un montant numérique inférieur à ${money(maxAmount, currency.value)}.`)
-    return false
-  }
-  if (amount.value < 0) {
-    queueNotifService.error('Le montant doit être supérieur à 0.')
-    return false
-  }
-  return true
+  return validateAndNotify(
+    transactionFormSchema,
+    { name: name.value, amount: amount.value, payBy: payBy.value },
+    t,
+    { amount: { max: money(maxAmount, currency.value) } }
+  )
 }
 
 const submitTransaction = async (finish: () => void) => {