refactor: Remove unused DB translation system

Static dictionary (i18n.ts CAR_TRANSLATIONS) already covers all terms.
DB translations table had only 179 entries used as fallback and was
never actually reached. Simplifies useTranslate hook to static-only.
DB table preserved for safety.

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

backend/app/main.py

@@ -9,7 +9,7 @@ import asyncio
 from apscheduler.schedulers.asyncio import AsyncIOScheduler
 from apscheduler.triggers.cron import CronTrigger
 from .database import engine, Base, SessionLocal
-from .api import cars, auth, inquiries, hero_banners, carmodoo, translations, cc, settings, vehicle_requests, dealer, vehicle_share, withdrawal, referral, notification, dashboard, push, exchange_rate, verification, visitor, sns_share, bulletin, reviews
+from .api import cars, auth, inquiries, hero_banners, carmodoo, cc, settings, vehicle_requests, dealer, vehicle_share, withdrawal, referral, notification, dashboard, push, exchange_rate, verification, visitor, sns_share, bulletin, reviews
 from .config import get_settings
 from .services.exchange_rate_service import update_exchange_rates
 from .services.visitor_service import aggregate_daily_stats, cleanup_old_visitor_logs
@@ -223,7 +223,6 @@ app.include_router(auth.router, prefix="/api")
 app.include_router(inquiries.router, prefix="/api")
 app.include_router(hero_banners.router, prefix="/api")
 app.include_router(carmodoo.router, prefix="/api")
-app.include_router(translations.router, prefix="/api")
 app.include_router(cc.router, prefix="/api")
 app.include_router(settings.router, prefix="/api")
 app.include_router(vehicle_requests.router, prefix="/api")

backend/app/models/__init__.py

@@ -2,7 +2,6 @@ from .car import CarMaker, CarModel, Car, CarImage, CarOption
 from .user import User, CarView, PerformanceCheckView, ChargeHistory, VerificationCode
 from .inquiry import Inquiry, InquiryMessage, InquiryStatus, InquiryCategory
 from .hero_banner import HeroBanner, HeroBannerSettings
-from .translation import Translation
 from .cache import CarCache, CarDetailCache, CacheRequestQueue
 from .settings import SystemSettings
 from .vehicle_request import VehicleRequest, RequestVehicle, PurchasedVehicle
@@ -40,7 +39,6 @@ __all__ = [
     "InquiryCategory",
     "HeroBanner",
     "HeroBannerSettings",
-    "Translation",
     "CarCache",
     "CarDetailCache",
     "CacheRequestQueue",

backend/app/models/translation.py

@@ -1,28 +0,0 @@
-from sqlalchemy import Column, Integer, String, DateTime, Index
-from sqlalchemy.sql import func
-from ..database import Base
-
-
-class Translation(Base):
-    """Translation dictionary for car-related terms"""
-    __tablename__ = "translations"
-
-    id = Column(Integer, primary_key=True, index=True)
-
-    # Source text (Korean)
-    source_text = Column(String(500), nullable=False, index=True)
-
-    # Category: maker, model, fuel, transmission, color, car_name, etc.
-    category = Column(String(50), nullable=False, index=True)
-
-    # Translations
-    text_en = Column(String(500))  # English
-    text_mn = Column(String(500))  # Mongolian
-    text_ru = Column(String(500))  # Russian
-
-    created_at = Column(DateTime, default=func.now())
-    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
-
-    __table_args__ = (
-        Index('ix_translations_source_category', 'source_text', 'category', unique=True),
-    )

backend/app/schemas/__init__.py

@@ -16,10 +16,6 @@ from .hero_banner import (
     HeroBannerListResponse, HeroBannerLocalizedResponse,
     HeroBannerSettingsUpdate, HeroBannerSettingsResponse,
 )
-from .translation import (
-    TranslationCreate, TranslationUpdate, TranslationResponse,
-    TranslationListResponse, TranslationBulkRequest, TranslationBulkResponse,
-)
 from .vehicle_request import (
     VehicleRequestCreate, VehicleRequestResponse,
     RequestVehicleCreate, RequestVehicleResponse, RequestVehicleApprove,
@@ -65,8 +61,6 @@ __all__ = [
     "HeroBannerCreate", "HeroBannerUpdate", "HeroBannerResponse",
     "HeroBannerListResponse", "HeroBannerLocalizedResponse",
     "HeroBannerSettingsUpdate", "HeroBannerSettingsResponse",
-    "TranslationCreate", "TranslationUpdate", "TranslationResponse",
-    "TranslationListResponse", "TranslationBulkRequest", "TranslationBulkResponse",
     "VehicleRequestCreate", "VehicleRequestResponse",
     "RequestVehicleCreate", "RequestVehicleResponse", "RequestVehicleApprove",
     "PurchasedVehicleCreate", "PurchasedVehicleResponse", "PurchasedVehicleUpdateStatus",

backend/app/schemas/translation.py

@@ -1,52 +0,0 @@
-from pydantic import BaseModel
-from typing import Optional, List
-from datetime import datetime
-
-
-class TranslationCreate(BaseModel):
-    source_text: str
-    category: str
-    text_en: Optional[str] = None
-    text_mn: Optional[str] = None
-    text_ru: Optional[str] = None
-
-
-class TranslationUpdate(BaseModel):
-    source_text: Optional[str] = None
-    category: Optional[str] = None
-    text_en: Optional[str] = None
-    text_mn: Optional[str] = None
-    text_ru: Optional[str] = None
-
-
-class TranslationResponse(BaseModel):
-    id: int
-    source_text: str
-    category: str
-    text_en: Optional[str] = None
-    text_mn: Optional[str] = None
-    text_ru: Optional[str] = None
-    created_at: datetime
-    updated_at: datetime
-
-    class Config:
-        from_attributes = True
-
-
-class TranslationListResponse(BaseModel):
-    total: int
-    page: int
-    page_size: int
-    translations: List[TranslationResponse]
-
-
-class TranslationBulkRequest(BaseModel):
-    """Bulk translation lookup request"""
-    texts: List[str]
-    category: Optional[str] = None
-    lang: str = "en"
-
-
-class TranslationBulkResponse(BaseModel):
-    """Returns a dictionary mapping source text to translated text"""
-    translations: dict  # {source_text: translated_text}