Implement rate limiting and enhance authentication flow

- Added rate limiting configuration for authentication endpoints, allowing customizable request limits via environment variables.
- Updated authentication flow to utilize HttpRequest for cookie management, ensuring secure handling of refresh tokens.
- Introduced a new endpoint to retrieve user subscription details.
- Enhanced the handling of Telegram bot token validation to prevent errors with empty tokens.
- Updated the application to serialize enums as strings for better documentation and compatibility with TypeScript.
- Improved test coverage for new features and adjustments in command handlers.

frontend/src/features/auth/RegisterForm.tsx

@@ -0,0 +1,69 @@
+import { zodResolver } from '@hookform/resolvers/zod'
+import { useForm } from 'react-hook-form'
+import { useTranslation } from 'react-i18next'
+import { z } from 'zod'
+import { toast } from '@/shared/ui/toast-store'
+import { Button } from '@/shared/ui/button'
+import { Input } from '@/shared/ui/input'
+import { Label } from '@/shared/ui/label'
+import { HttpError } from '@/shared/api/client'
+import { login, register as registerUser, applyAuthResponse } from './api'
+
+const schema = z.object({
+  userName: z
+    .string()
+    .min(3)
+    .max(32)
+    .regex(/^[a-zA-Z0-9_.-]+$/),
+  password: z.string().min(8),
+})
+
+type FormValues = z.infer<typeof schema>
+
+export function RegisterForm({ onSuccess }: { onSuccess: () => void }) {
+  const { t } = useTranslation()
+  const {
+    register: registerField,
+    handleSubmit,
+    formState: { errors, isSubmitting },
+  } = useForm<FormValues>({ resolver: zodResolver(schema) })
+
+  const onSubmit = async (values: FormValues) => {
+    try {
+      await registerUser(values.userName, values.password)
+      const auth = await login(values.userName, values.password)
+      applyAuthResponse(auth)
+      onSuccess()
+    } catch (error) {
+      const message =
+        error instanceof HttpError && error.status === 409 ? t('auth.duplicateUserName') : t('auth.genericError')
+      toast.error(message)
+    }
+  }
+
+  return (
+    <form onSubmit={handleSubmit(onSubmit)} className="flex flex-col gap-4">
+      <div className="flex flex-col gap-1.5">
+        <Label htmlFor="userName">{t('auth.userName')}</Label>
+        <Input id="userName" autoComplete="username" {...registerField('userName')} />
+        {errors.userName ? (
+          <p className="text-sm text-red-500">{t('auth.userNameHint')}</p>
+        ) : (
+          <p className="text-xs text-muted-foreground">{t('auth.userNameHint')}</p>
+        )}
+      </div>
+      <div className="flex flex-col gap-1.5">
+        <Label htmlFor="password">{t('auth.password')}</Label>
+        <Input id="password" type="password" autoComplete="new-password" {...registerField('password')} />
+        {errors.password ? (
+          <p className="text-sm text-red-500">{t('auth.passwordHint')}</p>
+        ) : (
+          <p className="text-xs text-muted-foreground">{t('auth.passwordHint')}</p>
+        )}
+      </div>
+      <Button type="submit" disabled={isSubmitting}>
+        {t('auth.submitRegister')}
+      </Button>
+    </form>
+  )
+}