fix: align frontend zod schemas with backend validation rules

Tightened frontend zod schemas where backend required fields the frontend marked optional, and matched enum/format constraints.

Schemas:
- vehicle-document: document_type required
- parts: shop_type, category, unit_type, department, sku required
- inspections: customer, vehicle, department, inspection_category, employee, order_number, date, time required
- appointments: service_writer required, cross-field to_time > from_time
- vendor-credits: vendor + vendor_credit_date required
- job-cards: documents[].document_type_id required
- expense-items: category, unit_type, department, sku required
- inventory-adjustments: reference_number, date required
- tasks: task_type, task_section required
- shop-timings: in_time, out_time enforce HH:MM:SS regex
- vendor-credit: subject + vendor + vendor_credit_date required

Settings:
- shop-type: shop_type + note required
- insurance-types: description field added, required
- make-and-models: shop_type required, year 1900..2100
- departments: assignment_type required enum (AssignmentType)
- company: website URL validation, latitude/longitude range, first_day_of_work enum, string max lengths
- configurations: 4 fields enum-typed (was raw strings)

Inline forms:
- job-card service/part/expense-item: relations required (part/service/expense_item/department)
- job-card recommendation: max 255
- vehicles/inline-forms/shop-type: shop_type + note required
- vehicles/inline-forms/body-type: shop_type_id pulled from parent form context, guard on submit
- vehicles/inline-forms/color: code field added, required
- services/inline-forms/department: assignment_type required enum
- tasks/task-section: arrangement required integer
- invoices/invoice-edit: status + discount enum-typed

Auth:
- login: password min 6 (was 8; backend allows 6)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/dashboard/modules/settings/configurations/configurations.schema.ts

@@ -1,24 +1,30 @@
 import { z } from "zod"
+import {
+    SellRatesTaxInclusive,
+    GiveDiscounts,
+    PurchaseRatesTaxInclusive,
+    ReceiveDiscounts,
+} from "@garage/api"
 
 export const salesConfigFormSchema = z.object({
-    sell_rates_tax_inclusive: z.string().optional(),
-    give_discounts: z.string().optional(),
+    sell_rates_tax_inclusive: z.enum(SellRatesTaxInclusive).optional(),
+    give_discounts: z.enum(GiveDiscounts).optional(),
 })
 
 export type SalesConfigFormValues = z.infer<typeof salesConfigFormSchema>
 
 export const purchaseConfigFormSchema = z.object({
-    purchase_rates_tax_inclusive: z.string().optional(),
-    receive_discounts: z.string().optional(),
+    purchase_rates_tax_inclusive: z.enum(PurchaseRatesTaxInclusive).optional(),
+    receive_discounts: z.enum(ReceiveDiscounts).optional(),
 })
 
 export type PurchaseConfigFormValues = z.infer<typeof purchaseConfigFormSchema>
 
 export const generalPreferencesFormSchema = z.object({
-    sell_rates_tax_inclusive: z.string().optional(),
-    give_discounts: z.string().optional(),
-    purchase_rates_tax_inclusive: z.string().optional(),
-    receive_discounts: z.string().optional(),
+    sell_rates_tax_inclusive: z.enum(SellRatesTaxInclusive).optional(),
+    give_discounts: z.enum(GiveDiscounts).optional(),
+    purchase_rates_tax_inclusive: z.enum(PurchaseRatesTaxInclusive).optional(),
+    receive_discounts: z.enum(ReceiveDiscounts).optional(),
 })
 
 export type GeneralPreferencesFormValues = z.infer<typeof generalPreferencesFormSchema>

apps/dashboard/modules/settings/configurations/general-preferences-form.tsx

@@ -23,10 +23,10 @@ const DISCOUNT_OPTIONS = DiscountType.map((v) => ({
 }))
 
 const DEFAULT_VALUES: GeneralPreferencesFormValues = {
-    sell_rates_tax_inclusive: "",
-    give_discounts: "",
-    purchase_rates_tax_inclusive: "",
-    receive_discounts: "",
+    sell_rates_tax_inclusive: undefined,
+    give_discounts: undefined,
+    purchase_rates_tax_inclusive: undefined,
+    receive_discounts: undefined,
 }
 
 export function GeneralPreferencesForm() {

apps/dashboard/modules/settings/configurations/purchase-config-form.tsx

@@ -23,8 +23,8 @@ const DISCOUNT_OPTIONS = DiscountType.map((v) => ({
 }))
 
 const DEFAULT_VALUES: PurchaseConfigFormValues = {
-    purchase_rates_tax_inclusive: "",
-    receive_discounts: "",
+    purchase_rates_tax_inclusive: undefined,
+    receive_discounts: undefined,
 }
 
 export function PurchaseConfigForm() {

apps/dashboard/modules/settings/configurations/sales-config-form.tsx

@@ -23,8 +23,8 @@ const DISCOUNT_OPTIONS = DiscountType.map((v) => ({
 }))
 
 const DEFAULT_VALUES: SalesConfigFormValues = {
-    sell_rates_tax_inclusive: "",
-    give_discounts: "",
+    sell_rates_tax_inclusive: undefined,
+    give_discounts: undefined,
 }
 
 export function SalesConfigForm() {