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/appointments/appointment.schema.ts

@@ -10,20 +10,30 @@ const APPOINTMENT_STATUS_OPTIONS = AppointmentStatus.map((v) => ({
     label: v.replace(/_/g, " ").replace(/\b\w/g, (c) => c.toUpperCase()),
 }))
 
-const appointmentFormSchema = z.object({
-    title: z.string().min(1, "Title is required"),
-    date: z.string().min(1, "Date is required"),
-    from_time: z.string().min(1, "Start time is required"),
-    to_time: z.string().min(1, "End time is required"),
-    customer: relationFieldSchema,
-    vehicle: relationFieldSchema,
-    service_writer: relationFieldSchema,
-    technician: relationFieldSchema,
-    department: relationFieldSchema,
-    job_card: relationFieldSchema,
-    notes: z.string().optional(),
-    status: z.string().optional(),
-})
+const appointmentFormSchema = z
+    .object({
+        title: z.string().min(1, "Title is required").max(255, "Title cannot exceed 255 characters"),
+        date: z.string().min(1, "Date is required"),
+        from_time: z.string().min(1, "Start time is required"),
+        to_time: z.string().min(1, "End time is required"),
+        customer: relationFieldSchema,
+        vehicle: relationFieldSchema,
+        service_writer: relationFieldSchema.refine((val) => !!val?.value, "Service writer is required"),
+        technician: relationFieldSchema,
+        department: relationFieldSchema,
+        job_card: relationFieldSchema,
+        notes: z.string().optional(),
+        status: z.string().optional(),
+    })
+    .superRefine((val, ctx) => {
+        if (val.from_time && val.to_time && val.to_time <= val.from_time) {
+            ctx.addIssue({
+                code: z.ZodIssueCode.custom,
+                path: ["to_time"],
+                message: "End time must be after start time",
+            })
+        }
+    })
 
 type AppointmentFormValues = z.infer<typeof appointmentFormSchema>