diff --git a/apps/web/src/components/form-field.tsx b/apps/web/src/components/form-field.tsx
index 061a075..94c47c1 100644
--- a/apps/web/src/components/form-field.tsx
+++ b/apps/web/src/components/form-field.tsx
@@ -3,6 +3,7 @@ import type { Control, FieldPath, FieldValues } from 'react-hook-form'
 import { Controller } from 'react-hook-form'
 import {
   Field,
+  FieldDescription,
   FieldError,
   FieldLabel,
 } from '@cfdm/ui/components/field'
@@ -13,6 +14,7 @@ interface FormFieldProps<T extends FieldValues> {
   control: Control<T>
   label: string
   htmlFor?: string
+  hint?: string
   className?: string
   children: (props: {
     id: string
@@ -29,6 +31,7 @@ export function FormField<T extends FieldValues>({
   control,
   label,
   htmlFor,
+  hint,
   className,
   children,
 }: FormFieldProps<T>) {
@@ -52,6 +55,9 @@ export function FormField<T extends FieldValues>({
             onBlur: field.onBlur,
             ref: field.ref,
           })}
+          {hint && !fieldState.error ? (
+            <FieldDescription>{hint}</FieldDescription>
+          ) : null}
           <FieldError errors={[fieldState.error]} />
         </Field>
       )}
@@ -80,9 +86,7 @@ export function FormFieldSimple({
     <Field data-invalid={!!error} className={cn(className)}>
       <FieldLabel htmlFor={htmlFor}>{label}</FieldLabel>
       {children}
-      {hint && !error && (
-        <p className="text-xs text-muted-foreground">{hint}</p>
-      )}
+      {hint && !error ? <FieldDescription>{hint}</FieldDescription> : null}
       <FieldError errors={[error]} />
     </Field>
   )
diff --git a/apps/web/src/components/service-edit-sheet.tsx b/apps/web/src/components/service-edit-sheet.tsx
index d533f3f..6c771e0 100644
--- a/apps/web/src/components/service-edit-sheet.tsx
+++ b/apps/web/src/components/service-edit-sheet.tsx
@@ -19,19 +19,6 @@ import type {
   UpdateServiceConfigInput,
 } from '@/lib/schemas'
 import { bindingToFqdn } from '@/lib/parse-fqdn'
-import { AppButton } from '@/components/app-button'
-import { AppInput } from '@/components/app-input'
-import {
-  AppField,
-  AppFieldGroup,
-  AppFieldLabel,
-} from '@/components/app-field'
-import {
-  AppItem,
-  AppItemContent,
-  AppItemGroup,
-} from '@/components/app-item'
-import { AppSeparator } from '@/components/app-separator'
 import {
   Sheet,
   SheetContent,
@@ -40,6 +27,14 @@ import {
   SheetHeader,
   SheetTitle,
 } from '@cfdm/ui/components/sheet'
+import { Button } from '@cfdm/ui/components/button'
+import { Field, FieldGroup, FieldLabel } from '@cfdm/ui/components/field'
+import { Input } from '@cfdm/ui/components/input'
+import {
+  Item,
+  ItemContent,
+  ItemGroup,
+} from '@cfdm/ui/components/item'
 import { LoadingButton } from '@/components/loading-button'
 import { TabsContent } from '@cfdm/ui/components/tabs'
 import {
@@ -405,27 +400,27 @@ export function ServiceEditSheet({
             listClassName="mb-0 w-full"
           >
             <TabsContent value="general" className="flex flex-col gap-4">
-              <AppFieldGroup className="flex flex-col gap-4">
-                <AppField>
-                  <AppFieldLabel htmlFor="edit-service-name">Название</AppFieldLabel>
-                  <AppInput
+              <FieldGroup className="flex flex-col gap-4">
+                <Field>
+                  <FieldLabel htmlFor="edit-service-name">Название</FieldLabel>
+                  <Input
                     id="edit-service-name"
                     value={name}
                     placeholder={isCreate ? 'VPN Panel' : undefined}
                     onChange={(e) => setName(e.target.value)}
                   />
-                </AppField>
-                <AppField>
-                  <AppFieldLabel htmlFor="edit-service-slug">Slug</AppFieldLabel>
-                  <AppInput
+                </Field>
+                <Field>
+                  <FieldLabel htmlFor="edit-service-slug">Slug</FieldLabel>
+                  <Input
                     id="edit-service-slug"
                     value={slug}
                     placeholder={isCreate ? 'vpn-panel' : undefined}
                     onChange={(e) => setSlug(e.target.value)}
                   />
-                </AppField>
-                <AppField>
-                  <AppFieldLabel htmlFor="edit-service-group">Группа сервисов</AppFieldLabel>
+                </Field>
+                <Field>
+                  <FieldLabel htmlFor="edit-service-group">Группа сервисов</FieldLabel>
                   <Select
                     items={groupItems}
                     value={serviceGroupId}
@@ -442,9 +437,9 @@ export function ServiceEditSheet({
                       ))}
                     </SelectContent>
                   </Select>
-                </AppField>
-                <AppField>
-                  <AppFieldLabel htmlFor="edit-service-ips">IP-адреса сервиса</AppFieldLabel>
+                </Field>
+                <Field>
+                  <FieldLabel htmlFor="edit-service-ips">IP-адреса сервиса</FieldLabel>
                   <TaggedInput
                     id="edit-service-ips"
                     value={ips}
@@ -452,8 +447,8 @@ export function ServiceEditSheet({
                     placeholder="192.168.1.1"
                     validate={isValidIpv4}
                   />
-                </AppField>
-              </AppFieldGroup>
+                </Field>
+              </FieldGroup>
 
               {groupHasDomain && (
                 <>
@@ -464,9 +459,9 @@ export function ServiceEditSheet({
                       сервиса для общего домена группы.
                     </p>
                     <div className="grid grid-cols-2 gap-4">
-                      <AppField>
-                        <AppFieldLabel htmlFor="service-lb-weight">Вес</AppFieldLabel>
-                        <AppInput
+                      <Field>
+                        <FieldLabel htmlFor="service-lb-weight">Вес</FieldLabel>
+                        <Input
                           id="service-lb-weight"
                           type="number"
                           inputMode="numeric"
@@ -477,10 +472,10 @@ export function ServiceEditSheet({
                             setLbWeight(Math.max(1, Number(e.target.value) || 1))
                           }
                         />
-                      </AppField>
-                      <AppField>
-                        <AppFieldLabel htmlFor="service-lb-priority">Приоритет</AppFieldLabel>
-                        <AppInput
+                      </Field>
+                      <Field>
+                        <FieldLabel htmlFor="service-lb-priority">Приоритет</FieldLabel>
+                        <Input
                           id="service-lb-priority"
                           type="number"
                           inputMode="numeric"
@@ -491,7 +486,7 @@ export function ServiceEditSheet({
                             setLbPriority(Math.max(1, Number(e.target.value) || 1))
                           }
                         />
-                      </AppField>
+                      </Field>
                     </div>
                   </div>
                 </>
@@ -503,10 +498,10 @@ export function ServiceEditSheet({
                 <p className="text-sm text-muted-foreground">
                   FQDN → IP или CNAME для DNS-записей Cloudflare
                 </p>
-                <AppButton type="button" variant="outline" size="sm" onClick={handleAddBinding}>
+                <Button type="button" variant="outline" size="sm" onClick={handleAddBinding}>
                   <PlusIcon data-icon="inline-start" />
                   Добавить
-                </AppButton>
+                </Button>
               </div>
 
               {bindings.length === 0 ? (
@@ -515,14 +510,14 @@ export function ServiceEditSheet({
                   title="Нет привязок"
                   description="Необязательно. Пример: newdom.ivx.su — зона ivx.su определится автоматически."
                   action={
-                    <AppButton type="button" variant="outline" size="sm" onClick={handleAddBinding}>
+                    <Button type="button" variant="outline" size="sm" onClick={handleAddBinding}>
                       <PlusIcon data-icon="inline-start" />
                       Добавить привязку
-                    </AppButton>
+                    </Button>
                   }
                 />
               ) : (
-                <AppItemGroup className="gap-2">
+                <ItemGroup className="gap-2">
                   {bindings.map((binding, index) => {
                     const showLbBlock =
                       (binding.record_type === 'A' && binding.target_ips.length > 0) ||
@@ -532,11 +527,11 @@ export function ServiceEditSheet({
                       binding.target_ips.length > 1 &&
                       binding.lb_mode !== 'round_robin'
                     return (
-                      <AppItem key={`binding-${index}`} variant="outline" className="items-stretch">
-                        <AppItemContent className="w-full flex flex-col gap-3">
+                      <Item key={`binding-${index}`} variant="outline" className="items-stretch">
+                        <ItemContent className="w-full flex flex-col gap-3">
                           <div className="flex items-end gap-2">
-                            <AppField className="min-w-0 flex-1">
-                              <AppFieldLabel htmlFor={`binding-fqdn-${index}`}>FQDN</AppFieldLabel>
+                            <Field className="min-w-0 flex-1">
+                              <FieldLabel htmlFor={`binding-fqdn-${index}`}>FQDN</FieldLabel>
                               <TaggedInput
                                 id={`binding-fqdn-${index}`}
                                 value={binding.fqdn ? [binding.fqdn] : []}
@@ -546,8 +541,8 @@ export function ServiceEditSheet({
                                 }
                                 maxItems={1}
                               />
-                            </AppField>
-                            <AppButton
+                            </Field>
+                            <Button
                               type="button"
                               variant="ghost"
                               size="icon-sm"
@@ -556,10 +551,10 @@ export function ServiceEditSheet({
                               onClick={() => handleRemoveBinding(index)}
                             >
                               <Trash2Icon />
-                            </AppButton>
+                            </Button>
                           </div>
-                          <AppField>
-                            <AppFieldLabel htmlFor={`binding-type-${index}`}>Тип записи</AppFieldLabel>
+                          <Field>
+                            <FieldLabel htmlFor={`binding-type-${index}`}>Тип записи</FieldLabel>
                             <Select
                               items={[
                                 { label: 'A (IP)', value: 'A' },
@@ -578,22 +573,22 @@ export function ServiceEditSheet({
                                 <SelectItem value="CNAME">CNAME</SelectItem>
                               </SelectContent>
                             </Select>
-                          </AppField>
+                          </Field>
                           {binding.record_type === 'CNAME' ? (
-                            <AppField>
-                              <AppFieldLabel htmlFor={`binding-cname-${index}`}>
+                            <Field>
+                              <FieldLabel htmlFor={`binding-cname-${index}`}>
                                 CNAME-цель
-                              </AppFieldLabel>
-                              <AppInput
+                              </FieldLabel>
+                              <Input
                                 id={`binding-cname-${index}`}
                                 value={binding.target_cname}
                                 placeholder="mmsk.rkns.top"
                                 onChange={(event) => handleCnameChange(index, event.target.value)}
                               />
-                            </AppField>
+                            </Field>
                           ) : (
-                            <AppField>
-                              <AppFieldLabel htmlFor={`binding-ip-${index}`}>IP</AppFieldLabel>
+                            <Field>
+                              <FieldLabel htmlFor={`binding-ip-${index}`}>IP</FieldLabel>
                               <ServiceBindingIpInput
                                 id={`binding-ip-${index}`}
                                 value={binding.target_ips}
@@ -606,7 +601,7 @@ export function ServiceEditSheet({
                                   handleBindingMetaChange(index, ip, meta)
                                 }
                               />
-                            </AppField>
+                            </Field>
                           )}
 
                           {showLbBlock ? (
@@ -629,17 +624,17 @@ export function ServiceEditSheet({
                               idPrefix={`binding-${index}-health`}
                             />
                           ) : null}
-                        </AppItemContent>
-                      </AppItem>
+                        </ItemContent>
+                      </Item>
                     )
                   })}
-                </AppItemGroup>
+                </ItemGroup>
               )}
             </TabsContent>
           </CountedLineTabs>
         </div>
 
-        <AppSeparator />
+        <Separator />
 
         <SheetFooter className="flex flex-row flex-wrap gap-2 border-t-0 pt-4">
           {!isCreate ? (
diff --git a/apps/web/src/components/subdomain-edit-sheet.tsx b/apps/web/src/components/subdomain-edit-sheet.tsx
index a00507a..f47cbd7 100644
--- a/apps/web/src/components/subdomain-edit-sheet.tsx
+++ b/apps/web/src/components/subdomain-edit-sheet.tsx
@@ -1,12 +1,16 @@
-import { useEffect, useMemo, useState } from 'react'
+import { useEffect, useMemo } from 'react'
+import { useForm, Controller } from 'react-hook-form'
+import { zodResolver } from '@hookform/resolvers/zod'
+import { z } from 'zod'
 import type { CertMonitoring } from '@cfdm/shared'
 import type { ServiceView, SubdomainRecord } from '@/lib/schemas'
 import { certMonitoringOptions } from '@/lib/cert-monitoring'
 import { formatServiceGroupLabel } from '@/lib/service-utils'
+import { FormSheet } from '@/components/form-sheet'
 import { FormFieldSimple } from '@/components/form-field'
 import { LoadingButton } from '@/components/loading-button'
-import { AppInput } from '@/components/app-input'
-import { AppFieldDescription, AppFieldGroup } from '@/components/app-field'
+import { FieldGroup } from '@cfdm/ui/components/field'
+import { Input } from '@cfdm/ui/components/input'
 import {
   Select,
   SelectContent,
@@ -14,20 +18,14 @@ import {
   SelectTrigger,
   SelectValue,
 } from '@cfdm/ui/components/select'
-import {
-  Sheet,
-  SheetContent,
-  SheetDescription,
-  SheetFooter,
-  SheetHeader,
-  SheetTitle,
-} from '@cfdm/ui/components/sheet'
 
-export interface SubdomainEditValues {
-  name: string
-  serviceId: string
-  certMonitoring: CertMonitoring
-}
+const subdomainEditSchema = z.object({
+  name: z.string().min(1, 'Укажите имя'),
+  serviceId: z.string(),
+  certMonitoring: z.enum(['auto', 'required', 'skipped']),
+})
+
+export type SubdomainEditValues = z.infer<typeof subdomainEditSchema>
 
 interface SubdomainEditSheetProps {
   mode: 'create' | 'edit'
@@ -54,9 +52,14 @@ export function SubdomainEditSheet({
   onOpenChange,
   onSubmit,
 }: SubdomainEditSheetProps) {
-  const [name, setName] = useState('')
-  const [serviceId, setServiceId] = useState('none')
-  const [certMonitoring, setCertMonitoring] = useState<CertMonitoring>('auto')
+  const form = useForm<SubdomainEditValues>({
+    resolver: zodResolver(subdomainEditSchema),
+    defaultValues: {
+      name: '',
+      serviceId: 'none',
+      certMonitoring: 'auto',
+    },
+  })
 
   const serviceItems = useMemo(
     () => [
@@ -84,55 +87,83 @@ export function SubdomainEditSheet({
   useEffect(() => {
     if (!open) return
     if (mode === 'edit' && subdomain) {
-      setName(subdomain.name)
-      setServiceId(currentServiceId || 'none')
-      setCertMonitoring(subdomain.cert_monitoring)
+      form.reset({
+        name: subdomain.name,
+        serviceId: currentServiceId || 'none',
+        certMonitoring: subdomain.cert_monitoring,
+      })
       return
     }
-    setName('')
-    setServiceId('none')
-    setCertMonitoring('auto')
-  }, [open, mode, subdomain, currentServiceId])
+    form.reset({
+      name: '',
+      serviceId: 'none',
+      certMonitoring: 'auto',
+    })
+  }, [open, mode, subdomain, currentServiceId, form])
 
-  function handleSubmit(event: React.FormEvent) {
-    event.preventDefault()
-    const trimmed = name.trim()
-    if (!trimmed) return
-    onSubmit({ name: trimmed, serviceId, certMonitoring })
+  const certMonitoring = form.watch('certMonitoring')
+  const certHint =
+    certMonitoringOptions.find((o) => o.value === certMonitoring)?.description
+
+  function handleSubmit(values: SubdomainEditValues) {
+    onSubmit({
+      name: values.name.trim(),
+      serviceId: values.serviceId,
+      certMonitoring: values.certMonitoring as CertMonitoring,
+    })
   }
 
   return (
-    <Sheet open={open} onOpenChange={onOpenChange}>
-      <SheetContent>
-        <SheetHeader>
-          <SheetTitle>
-            {mode === 'create' ? 'Создать поддомен' : 'Редактировать поддомен'}
-          </SheetTitle>
-          <SheetDescription>
-            {mode === 'create'
-              ? `Имя записи в зоне ${zoneName} (например, www или api)`
-              : `Изменение поддомена в зоне ${zoneName}`}
-          </SheetDescription>
-        </SheetHeader>
-        <form onSubmit={handleSubmit} className="flex flex-col gap-4 px-4">
-          <AppFieldGroup>
-            <FormFieldSimple label="Имя" htmlFor="subdomain_name">
-              <AppInput
-                id="subdomain_name"
-                placeholder="www"
-                value={name}
-                onChange={(event) => setName(event.target.value)}
-                className="font-mono"
-                aria-invalid={!name.trim() && name.length > 0}
-              />
-            </FormFieldSimple>
-            {mode === 'edit' && (
-              <>
-                <FormFieldSimple label="Сервис" htmlFor="subdomain_service">
+    <FormSheet<SubdomainEditValues>
+      open={open}
+      onOpenChange={onOpenChange}
+      title={
+        mode === 'create' ? 'Создать поддомен' : 'Редактировать поддомен'
+      }
+      description={
+        mode === 'create'
+          ? `Имя записи в зоне ${zoneName} (например, www или api)`
+          : `Изменение поддомена в зоне ${zoneName}`
+      }
+      form={form}
+      onSubmit={handleSubmit}
+      footer={
+        <LoadingButton
+          type="submit"
+          className="w-full"
+          disabled={!form.watch('name')?.trim()}
+          isLoading={isSaving}
+          loadingLabel="Сохранение…"
+        >
+          {mode === 'create' ? 'Создать' : 'Сохранить'}
+        </LoadingButton>
+      }
+    >
+      <FieldGroup>
+        <FormFieldSimple
+          label="Имя"
+          htmlFor="subdomain_name"
+          error={form.formState.errors.name}
+        >
+          <Input
+            id="subdomain_name"
+            placeholder="www"
+            className="font-mono"
+            aria-invalid={!!form.formState.errors.name}
+            {...form.register('name')}
+          />
+        </FormFieldSimple>
+        {mode === 'edit' ? (
+          <>
+            <FormFieldSimple label="Сервис" htmlFor="subdomain_service">
+              <Controller
+                control={form.control}
+                name="serviceId"
+                render={({ field }) => (
                   <Select
                     items={serviceItems}
-                    value={serviceId}
-                    onValueChange={(value) => setServiceId(value ?? 'none')}
+                    value={field.value}
+                    onValueChange={(value) => field.onChange(value ?? 'none')}
                   >
                     <SelectTrigger id="subdomain_service" className="w-full">
                       <SelectValue placeholder="Без сервиса" />
@@ -145,19 +176,29 @@ export function SubdomainEditSheet({
                       ))}
                     </SelectContent>
                   </Select>
-                </FormFieldSimple>
-                <FormFieldSimple
-                  label="Мониторинг SSL"
-                  htmlFor="subdomain_cert_monitoring"
-                >
+                )}
+              />
+            </FormFieldSimple>
+            <FormFieldSimple
+              label="Мониторинг SSL"
+              htmlFor="subdomain_cert_monitoring"
+              hint={certHint}
+            >
+              <Controller
+                control={form.control}
+                name="certMonitoring"
+                render={({ field }) => (
                   <Select
                     items={certMonitoringItems}
-                    value={certMonitoring}
+                    value={field.value}
                     onValueChange={(value) =>
-                      setCertMonitoring((value ?? 'auto') as CertMonitoring)
+                      field.onChange((value ?? 'auto') as CertMonitoring)
                     }
                   >
-                    <SelectTrigger id="subdomain_cert_monitoring" className="w-full">
+                    <SelectTrigger
+                      id="subdomain_cert_monitoring"
+                      className="w-full"
+                    >
                       <SelectValue />
                     </SelectTrigger>
                     <SelectContent>
@@ -168,29 +209,12 @@ export function SubdomainEditSheet({
                       ))}
                     </SelectContent>
                   </Select>
-                  <AppFieldDescription>
-                    {
-                      certMonitoringOptions.find((o) => o.value === certMonitoring)
-                        ?.description
-                    }
-                  </AppFieldDescription>
-                </FormFieldSimple>
-              </>
-            )}
-          </AppFieldGroup>
-          <SheetFooter>
-            <LoadingButton
-              type="submit"
-              className="w-full"
-              disabled={!name.trim()}
-              isLoading={isSaving}
-              loadingLabel="Сохранение…"
-            >
-              {mode === 'create' ? 'Создать' : 'Сохранить'}
-            </LoadingButton>
-          </SheetFooter>
-        </form>
-      </SheetContent>
-    </Sheet>
+                )}
+              />
+            </FormFieldSimple>
+          </>
+        ) : null}
+      </FieldGroup>
+    </FormSheet>
   )
 }