重构表结构：合并 profiles→users，展平 API 响应，新增计数器字段

- models: 删除 Profile 模型，字段合并到 User；User 新增云朵/公开/收藏计数器；Cloud 新增 favorite_count
- schemas/serializers: 展平 UserOut/AuthOut/MeOut/AdminUserOut，移除嵌套 profile
- deps: user.profile.role→user.role，移除 selectinload profile
- auth/register: 注册时直接设置 user 字段，不再创建 Profile
- clouds: 创建/删除云朵时同步 user.cloud_count 计数器，状态变化时同步 public_cloud_count
- favorites: 点赞/取消时同步 cloud.favorite_count 计数器
- admin: 审批/隐藏/批量删时同步 public_cloud_count 计数器
- profiles/stats: 用计数器替代实时 COUNT 查询
- alembic: 新增 migration 合并 profiles 到 users，初始化 counters

app/serializers.py

@@ -1,12 +1,10 @@
 from app.config import settings
-from app.models import Cloud, CloudType, Profile, User
+from app.models import Cloud, CloudType, User
 from app.schemas import (
     CloudOut,
     CloudOwnerOut,
     CloudTypeOut,
     CloudTypeSummary,
-    ProfileOut,
-    PublicProfileOut,
     UserOut,
 )
 
@@ -17,31 +15,18 @@ def media_url(path: str | None) -> str | None:
     return f"{settings.media_base_url}/{path.lstrip('/')}"
 
 
-def profile_out(profile: Profile) -> ProfileOut:
-    return ProfileOut(
-        id=profile.id,
-        username=profile.username,
-        avatar_url=media_url(profile.avatar_path),
-        role=profile.role,
-        is_disabled=profile.is_disabled,
-        created_at=profile.created_at,
-    )
-
-
-def public_profile_out(profile: Profile) -> PublicProfileOut:
-    return PublicProfileOut(
-        id=profile.id,
-        username=profile.username,
-        avatar_url=media_url(profile.avatar_path),
-        created_at=profile.created_at,
-    )
-
-
 def user_out(user: User) -> UserOut:
     return UserOut(
         id=user.id,
         email=user.email,
         email_verified=user.email_verified_at is not None,
+        username=user.username,
+        avatar_url=media_url(user.avatar_path),
+        role=user.role,
+        is_disabled=user.is_disabled,
+        cloud_count=user.cloud_count,
+        public_cloud_count=user.public_cloud_count,
+        collection_count=user.collection_count,
         created_at=user.created_at,
     )
 
@@ -68,9 +53,15 @@ def cloud_type_out(cloud_type: CloudType) -> CloudTypeOut:
     )
 
 
-def cloud_out(cloud: Cloud, *, include_private: bool = True) -> CloudOut:
+def cloud_out(
+    cloud: Cloud,
+    *,
+    include_private: bool = True,
+    favorite_count: int | None = None,
+    is_favorited: bool = False,
+) -> CloudOut:
     cloud_type = cloud.cloud_type
-    profile = cloud.user.profile
+    owner = cloud.user
     type_name = cloud_type.name if cloud_type else (cloud.custom_cloud_type or "未知")
     rarity = cloud_type.rarity if cloud_type else "common"
     return CloudOut(
@@ -90,8 +81,10 @@ def cloud_out(cloud: Cloud, *, include_private: bool = True) -> CloudOut:
         created_at=cloud.created_at,
         updated_at=cloud.updated_at,
         cloud_type=cloud_type_summary(cloud_type) if cloud_type else None,
-        owner=CloudOwnerOut(id=profile.id, username=profile.username),
+        owner=CloudOwnerOut(id=owner.id, username=owner.username),
         cloud_type_name=type_name,
         cloud_type_rarity=rarity,
-        username=profile.username,
+        username=owner.username,
+        favorite_count=favorite_count if favorite_count is not None else 0,
+        is_favorited=is_favorited,
     )