feat(feedback): 补齐反馈历史审核发奖闭环

- 新增反馈审核字段和迁移，支持 pending/adopted/rejected、未采纳原因和采纳金币

- 增加用户端反馈历史 records 接口和 admin 采纳/拒绝接口

- 采纳时同事务写状态、金币流水和审计日志，拦截重复审核

- 验证：pytest tests/test_feedback.py tests/test_admin_write.py tests/test_admin_read.py

tests/test_feedback.py

@@ -0,0 +1,77 @@
+"""用户反馈接口测试。"""
+from __future__ import annotations
+
+from app.db.session import SessionLocal
+from app.models.feedback import Feedback
+from app.repositories import user as user_repo
+
+
+def _login(client, phone: str) -> str:
+    client.post("/api/v1/auth/sms/send", json={"phone": phone})
+    r = client.post("/api/v1/auth/sms/login", json={"phone": phone, "code": "123456"})
+    assert r.status_code == 200, r.text
+    return r.json()["access_token"]
+
+
+def test_feedback_records_empty_returns_200(client) -> None:
+    token = _login(client, "13622000001")
+
+    r = client.get("/api/v1/feedback/records", headers={"Authorization": f"Bearer {token}"})
+
+    assert r.status_code == 200, r.text
+    assert r.json() == {
+        "records": [],
+        "counts": {"all": 0, "pending": 0, "adopted": 0, "rejected": 0},
+    }
+
+
+def test_feedback_config_returns_default(client) -> None:
+    token = _login(client, "13622000002")
+
+    r = client.get("/api/v1/feedback/config", headers={"Authorization": f"Bearer {token}"})
+
+    assert r.status_code == 200, r.text
+    body = r.json()
+    assert body["enabled"] is True
+    assert body["group_name"] == "傻瓜比价官方群"
+
+
+def test_feedback_records_maps_existing_statuses(client) -> None:
+    phone = "13622000003"
+    token = _login(client, phone)
+
+    db = SessionLocal()
+    try:
+        user = user_repo.get_user_by_phone(db, phone)
+        assert user is not None
+        db.add(Feedback(user_id=user.id, content="待处理反馈", contact="", status="pending"))
+        db.add(
+            Feedback(
+                user_id=user.id,
+                content="已采纳反馈",
+                contact="",
+                status="adopted",
+                reward_coins=800,
+            )
+        )
+        db.add(
+            Feedback(
+                user_id=user.id,
+                content="未采纳反馈",
+                contact="",
+                status="rejected",
+                reject_reason="暂未提供可复现信息",
+            )
+        )
+        db.commit()
+    finally:
+        db.close()
+
+    r = client.get("/api/v1/feedback/records", headers={"Authorization": f"Bearer {token}"})
+
+    assert r.status_code == 200, r.text
+    body = r.json()
+    assert body["counts"] == {"all": 3, "pending": 1, "adopted": 1, "rejected": 1}
+    by_status = {item["status"]: item for item in body["records"]}
+    assert by_status["adopted"]["reward_coins"] == 800
+    assert by_status["rejected"]["reject_reason"] == "暂未提供可复现信息"