fix(server): PV统计加event_name过滤——增量停留事件不再灌倍PV（gzip 4817B记录：0.1.0为3838，增量989）

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

server/tracker/tests/test_dashboard.py

@@ -290,3 +290,24 @@ def test_overview_avg_stay_mixed_v1_v2_session(client, member_user):
     d = client.get("/api/admin/dashboard/overview", {"range": "today"}).json()["data"]
     assert d["cards"]["visits"]["value"] == 1
     assert d["cards"]["avg_stay_ms"] == {"value": 38000, "delta_pct": None}   # 38000/1；上期无会话 → None
+
+
+def test_overview_trend_pv_only_page_view(client, member_user):
+    """PV 口径回归（阶段A T11）：SDK 0.2.0 每 15s 一条 page_stay 增量 + sdk_loaded，
+    趋势自愈回写 DailyStat.pv 只计 page_view（与 daily_counts 同口径）——
+    增量停留事件不得灌倍 PV；uv 仍按任意事件 distinct visitor 计。"""
+    _auth(client, member_user)
+    site = Site.objects.create(name="s", domains=["a.com"])
+    v1 = _visitor(site, "v1", last_seen=timezone.now())
+    s1 = _session(site, v1, "s1")
+    # 模拟一次活跃访问的事件流：1 次浏览 + SDK 装载 + 3 条 15s 停留增量
+    names = ["page_view", "sdk_loaded", "page_stay", "page_stay", "page_stay"]
+    for i, name in enumerate(names):
+        Event.objects.create(site=site, visitor=v1, session=s1,
+            event_id=f"pvx-{i}", event_name=name,
+            occurred_at=NOW + timedelta(seconds=i), path="/")
+
+    d = client.get("/api/admin/dashboard/overview").json()["data"]
+    assert d["trend"][-1] == {"date": TODAY.isoformat(), "uv": 1, "sessions": 1}
+    row = DailyStat.objects.get(site=site, date=TODAY)
+    assert (row.pv, row.uv) == (1, 1)   # 5 条事件仅 1 条 page_view 计 PV

server/tracker/tests/test_stats.py

@@ -58,3 +58,18 @@ def test_refresh_daily_excludes_bots(db):
     assert (d.pv, d.uv, d.sessions) == (1, 1, 1)   # 只计 human 的事件/会话
     t = refresh_daily(site, timezone.localdate())  # 两位访客 first_seen_at 均为运行时，刷今天窗口才能非空验证 new_visitors
     assert t.new_visitors == 1                     # 爬虫访客不计入新增
+
+def test_refresh_daily_pv_only_counts_page_view(db):
+    # PV 口径回归（阶段A T11）：SDK 0.2.0 每 15s 一条 page_stay 增量 + 启动 sdk_loaded，
+    # pv 只计 page_view——增量停留事件不得灌倍 PV（5 分钟活跃访问 ≈ 22 条事件只有 1 条是浏览）。
+    # 固定时间戳钉死日界不依赖运行时刻（同 boundary 用例做法）
+    site = Site.objects.create(name="s", domains=["a.com"])
+    v = Visitor.objects.create(site=site, visitor_id="v1")
+    sess = VisitSession.objects.create(site=site, visitor=v, session_id="s1",
+        started_at="2026-09-15T10:00:00Z", ended_at="2026-09-15T10:05:00Z")
+    names = ["page_view", "sdk_loaded", "page_view", "page_stay", "page_stay", "page_stay"]
+    for i, name in enumerate(names):
+        Event.objects.create(site=site, visitor=v, session=sess, event_id=f"x{i}",
+            event_name=name, occurred_at=f"2026-09-15T10:00:0{i}Z", path="/")
+    d = refresh_daily(site, date(2026, 9, 15))
+    assert (d.pv, d.uv, d.sessions) == (2, 1, 1)   # 6 条事件仅 2 条 page_view 计 PV；uv 仍按任意事件 distinct