feat(analytics): 看板v2全平台口径——默认双渠道合计/拆分小字/双线趋势/跳转带query预选

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

yunke-server/app/api/routers/analytics.py

@@ -18,6 +18,9 @@ router = APIRouter(prefix="/api/analytics", tags=["analytics"])
 
 SessionDep = Annotated[AsyncSession, Depends(get_session)]
 ChannelParam = Annotated[Literal["wechat", "whatsapp"], Query()]
+# 看板 v2(2026-09-07):overview 默认全平台——"all" 在 router 层翻译成
+# metrics 的 channel=None,不把哨兵字符串传进 SQL
+AllChannelParam = Annotated[Literal["all", "wechat", "whatsapp"], Query()]
 ScopeParam = Annotated[Literal["today", "week", "month"], Query()]
 
 
@@ -31,15 +34,19 @@ async def analytics_health(session: SessionDep) -> dict[str, Any]:
 @router.get("/overview")
 async def analytics_overview(
     session: SessionDep,
-    channel: ChannelParam = "wechat",
+    channel: AllChannelParam = "all",
     scope: ScopeParam = "today",
 ) -> dict[str, Any]:
     """A1 经营总览:卡片+趋势+异常警示一次返回(单往返)。
 
+    channel=all(默认)=全平台口径:卡片合计+by_channel 拆分+trend_by_channel
+    双渠道趋势序列;单渠道行为不变。
     cards 不含 data_as_of——数据截至走 /health(data_as_of 为 ms-epoch int
     与 entities[].last_seen 为 ISO 字符串的双格式)。
     """
-    return await metrics_svc.overview(session, channel=channel, scope=scope)
+    return await metrics_svc.overview(
+        session, channel=None if channel == "all" else channel, scope=scope
+    )
 
 
 @router.get("/churn")