fix: sign-in password placeholder 6+ → 8+ символов

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

front_minimal/src/sections/auth/jwt/jwt-sign-in-view.jsx

@@ -111,7 +111,7 @@ export function JwtSignInView() {
         <Field.Text
           name="password"
           label="Пароль"
-          placeholder="6+ символов"
+          placeholder="8+ символов"
           type={password.value ? 'text' : 'password'}
           InputLabelProps={{ shrink: true }}
           InputProps={{