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/tasks/task-section-form.tsx

@@ -14,8 +14,11 @@ import { useEffect } from "react"
 // ── Schema ──
 
 const taskSectionSchema = z.object({
-    title: z.string().min(1, "Title is required"),
-    arrangement: z.string().optional(),
+    title: z.string().min(1, "Title is required").max(255, "Title cannot exceed 255 characters"),
+    arrangement: z
+        .string()
+        .min(1, "Arrangement is required")
+        .refine((v) => /^-?\d+$/.test(v), "Arrangement must be an integer"),
     is_default: z.boolean().optional(),
 })
 

apps/dashboard/modules/tasks/task.schema.ts

@@ -5,10 +5,10 @@ export const relationFieldSchema = z
     .nullable()
 
 export const taskFormSchema = z.object({
-    subject: z.string().min(1, "Subject is required"),
+    subject: z.string().min(1, "Subject is required").max(255, "Subject cannot exceed 255 characters"),
     description: z.string().optional(),
-    task_type: relationFieldSchema,
-    task_section: relationFieldSchema,
+    task_type: relationFieldSchema.refine((val) => !!val?.value, "Task type is required"),
+    task_section: relationFieldSchema.refine((val) => !!val?.value, "Task section is required"),
     owner: relationFieldSchema,
     department: relationFieldSchema,
     priority: z.string().optional(),