admin 反馈/低价审核接口增强 + 反馈采集端环境(版本/机型)

- 反馈:新增 GET /admin/api/feedbacks/summary(待审核/已采纳/未采纳/合计计数);
  列表联表带出完整手机号 + 昵称(供 admin 点手机号查该用户全部反馈)
- 低价审核:列表加 sort_by/sort_order(提交时间排序);联表带出手机号/昵称,
  并按 comparison_record_id 关联比价记录带出 trace_id/trace_url + 机型/ROM/Android/app 版本
- feedback 表新增 app_version/device_model/rom_name/android_version 四列 + alembic 迁移;
  /api/v1/feedback 提交接口接收并落库,供 admin 反馈页展示「提交版本号」「机型OS版本」
  (字段可空,旧端不传不影响提交)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/admin/routers/feedback.py

@@ -10,7 +10,12 @@ from app.admin.audit import write_audit
 from app.admin.deps import AdminDb, get_client_ip, get_current_admin, require_role
 from app.admin.repositories import mutations, queries
 from app.admin.schemas.common import CursorPage, OkResponse
-from app.admin.schemas.feedback import FeedbackApproveRequest, FeedbackOut, FeedbackRejectRequest
+from app.admin.schemas.feedback import (
+    FeedbackApproveRequest,
+    FeedbackOut,
+    FeedbackRejectRequest,
+    FeedbackSummary,
+)
 from app.models.admin import AdminUser
 from app.models.feedback import Feedback
 from app.repositories import wallet as wallet_repo
@@ -59,6 +64,11 @@ def list_feedbacks(
     )
 
 
+@router.get("/summary", response_model=FeedbackSummary, summary="反馈审核统计(各状态计数)")
+def feedback_summary(db: AdminDb) -> FeedbackSummary:
+    return FeedbackSummary.model_validate(queries.feedback_summary(db))
+
+
 @router.post("/{feedback_id}/handle", response_model=OkResponse, summary="标记反馈已处理")
 def handle_feedback(
     feedback_id: int,