feat: dual agency/client approval on calendar and assets

Private RRSS calendar with unified + per-network tabs, comments, and
double-check OK. Assets get review drawer with preview/comments. KPIs
gain date presets, North Star strip, channel matrix and per-channel dash.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/dashboard/kpis/page.tsx

@@ -6,6 +6,7 @@ import { resolveActiveTenant, restGet } from '@/lib/tenant-context';
 import {
   AdDailyRow,
   KpiWeeklyRow,
+  buildChannelSeries,
   buildComparisons,
   sumDaily,
   sumWeekly,
@@ -70,6 +71,7 @@ export default async function KpisPage() {
       : sumWeekly(weekly); // fallback: all available weeks if current month empty
   const dailyTotals = sumDaily(daily);
   const sparse = weekly.length < 4;
+  const channelSeries = buildChannelSeries(weekly);
 
   return (
     <MetricsDashboard
@@ -80,6 +82,8 @@ export default async function KpisPage() {
       deltas={comparisons.deltas}
       daily={dailyTotals}
       sparse={sparse}
+      weeklyRows={weekly}
+      channelPoints={channelSeries.points}
     />
   );
 }