feat: add WonderQ admin backend

Add FastAPI admin/public API service, database setup, Docker deployment files, docs, and tests.

app/routers/shared.py

@@ -0,0 +1,45 @@
+from sqlalchemy import select
+from sqlalchemy.orm import Session, selectinload
+from ..models import Campaign, CtaBanner, Destination, HeroSlide, Product, ThemeCard
+from ..serializers import destination_dict, model_dict
+
+
+ROUTE_SECTION_LABELS = [
+    ("routes", "经典人文打卡线路", 0, 8),
+    ("routes-outdoor", "极限山野户外野咖线路", 8, 16),
+    ("routes-mix", "人文+户外综合混搭线路", 16, 24),
+]
+
+
+def site_config(db: Session, active_only: bool, include_public_extras: bool = True) -> dict:
+    hero_stmt = select(HeroSlide).order_by(HeroSlide.sortOrder.asc())
+    destination_stmt = select(Destination).options(selectinload(Destination.aliases)).order_by(Destination.sortOrder.asc())
+    theme_stmt = select(ThemeCard).order_by(ThemeCard.sortOrder.asc())
+    cta_stmt = select(CtaBanner).order_by(CtaBanner.sortOrder.asc())
+    if active_only:
+        hero_stmt = hero_stmt.where(HeroSlide.isActive.is_(True))
+        destination_stmt = destination_stmt.where(Destination.isActive.is_(True))
+        theme_stmt = theme_stmt.where(ThemeCard.isActive.is_(True))
+        cta_stmt = cta_stmt.where(CtaBanner.isActive.is_(True))
+
+    hero_slides = db.scalars(hero_stmt).all()
+    destinations = db.scalars(destination_stmt).all()
+    themes = db.scalars(theme_stmt).all()
+    cta_banners = db.scalars(cta_stmt).all()
+    result = {
+        "heroSlides": [model_dict(item) for item in hero_slides],
+        "destinations": [destination_dict(item) for item in destinations],
+        "themes": [model_dict(item) for item in themes],
+        "ctaBanners": [model_dict(item) for item in cta_banners],
+    }
+    if include_public_extras:
+        campaigns = db.scalars(select(Campaign).where(Campaign.status == "published").order_by(Campaign.updatedAt.desc())).all()
+        products = db.scalars(
+            select(Product).where(Product.status == "published").order_by(Product.sortWeight.asc(), Product.createdAt.asc()).limit(48)
+        ).all()
+        result["campaigns"] = [model_dict(item) for item in campaigns]
+        result["routeSections"] = [
+            {"id": section_id, "title": title, "productIds": [item.id for item in products[start:end]]}
+            for section_id, title, start, end in ROUTE_SECTION_LABELS
+        ]
+    return result