fix(auth): add forgot password flow and fix OAuth URL clearing

client/src/features/auth-forgot/index.ts

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+export { AuthForgotForm } from './ui/AuthForgotForm'

client/src/features/auth-forgot/ui/AuthForgotForm.tsx

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+import { useState } from 'react'
+import Button from '@mui/material/Button'
+import InputAdornment from '@mui/material/InputAdornment'
+import Stack from '@mui/material/Stack'
+import TextField from '@mui/material/TextField'
+import Typography from '@mui/material/Typography'
+import { useMutation } from '@tanstack/react-query'
+import { Lock, Mail } from 'lucide-react'
+import { useForm } from 'react-hook-form'
+import { apiClient } from '@/shared/api/client'
+import { getApiErrorMessage } from '@/shared/lib/get-api-error-message'
+
+type Step = 'request' | 'reset'
+
+type FormValues = {
+  email: string
+  code: string
+  newPassword: string
+  passwordConfirm: string
+}
+
+type Props = {
+  onBack: () => void
+}
+
+export function AuthForgotForm({ onBack }: Props) {
+  const [step, setStep] = useState<Step>('request')
+
+  const { register, watch } = useForm<FormValues>({
+    defaultValues: { email: '', code: '', newPassword: '', passwordConfirm: '' },
+    mode: 'onChange',
+  })
+
+  const email = watch('email')
+  const code = watch('code')
+  const newPassword = watch('newPassword')
+  const passwordConfirm = watch('passwordConfirm')
+
+  const forgotCodeMutation = useMutation({
+    mutationFn: async () => {
+      await apiClient.post('auth/forgot-password', { email })
+    },
+    onSuccess: () => setStep('reset'),
+  })
+
+  const resetPasswordMutation = useMutation({
+    mutationFn: async () => {
+      await apiClient.post('auth/reset-password', { email, code, newPassword })
+    },
+  })
+
+  const passwordError = newPassword && passwordConfirm && newPassword !== passwordConfirm ? 'Пароли не совпадают' : null
+
+  return (
+    <Stack spacing={2}>
+      <Typography variant="body2" color="text.secondary" sx={{ textAlign: 'center' }}>
+        {step === 'request'
+          ? 'Введите email, на который будет отправлен код для сброса пароля'
+          : 'Введите код и новый пароль'}
+      </Typography>
+
+      <TextField
+        label="Email"
+        {...register('email')}
+        disabled={step === 'reset'}
+        fullWidth
+        slotProps={{
+          input: {
+            startAdornment: (
+              <InputAdornment position="start">
+                <Mail size={18} />
+              </InputAdornment>
+            ),
+          },
+        }}
+      />
+
+      {step === 'reset' && (
+        <>
+          <TextField label="Код (6 цифр)" inputMode="numeric" {...register('code')} fullWidth />
+          <TextField
+            label="Новый пароль"
+            type="password"
+            {...register('newPassword')}
+            fullWidth
+            slotProps={{
+              input: {
+                startAdornment: (
+                  <InputAdornment position="start">
+                    <Lock size={18} />
+                  </InputAdornment>
+                ),
+              },
+            }}
+          />
+          <TextField
+            label="Подтверждение пароля"
+            type="password"
+            {...register('passwordConfirm')}
+            fullWidth
+            error={Boolean(passwordError)}
+            helperText={passwordError}
+          />
+        </>
+      )}
+
+      {step === 'request' ? (
+        <Button
+          variant="contained"
+          disabled={!email || forgotCodeMutation.isPending}
+          onClick={() => forgotCodeMutation.mutate()}
+        >
+          Отправить код
+        </Button>
+      ) : (
+        <Button
+          variant="contained"
+          disabled={
+            !code ||
+            code.length !== 6 ||
+            !newPassword ||
+            newPassword.length < 8 ||
+            Boolean(passwordError) ||
+            resetPasswordMutation.isPending
+          }
+          onClick={() => resetPasswordMutation.mutate()}
+        >
+          Сменить пароль
+        </Button>
+      )}
+
+      <Button variant="text" size="small" onClick={onBack}>
+        Назад к входу
+      </Button>
+
+      {(forgotCodeMutation.error || resetPasswordMutation.error) && (
+        <TextField
+          error
+          helperText={getApiErrorMessage(forgotCodeMutation.error) || getApiErrorMessage(resetPasswordMutation.error)}
+          sx={{ display: 'none' }}
+        />
+      )}
+    </Stack>
+  )
+}