fix(insights): let the trends row fill a switched-off module's slot from the next metric

selectTrendCharts takes the record's module map and skips every slot
whose module is off, on the briefing path and on the fallback row,
through the surface map. Sleep was never covered before, and the
fallback row shrank to two charts with mood off; it now reaches for
pulse. The row reads the module map itself.

src/components/insights/trends-row.tsx

@@ -4,7 +4,7 @@ import dynamic from "next/dynamic";
 import Link from "next/link";
 import { ArrowRight, TrendingUp } from "lucide-react";
 import { useTranslations } from "@/lib/i18n/context";
-import { useAuth } from "@/hooks/use-auth";
+import { useAccountOnceMounted, useAuth } from "@/hooks/use-auth";
 import { ChartSkeleton } from "@/components/charts/chart-skeleton";
 import { SectionHeading } from "@/components/ui/section-heading";
 import { HealthChartDynamicMini } from "@/components/charts/health-chart-dynamic";
@@ -67,8 +67,8 @@ const MoodChart = dynamic(
 
 interface TrendsRowProps {
   /**
-   * Metrics to leave out because their module is switched off (for
-   * example `mood`). Passed straight to `selectTrendCharts`.
+   * Further metrics to leave out. Switched-off modules need no entry here:
+   * the row reads the record's module map itself.
    */
   hiddenMetrics?: SelectTrendChartsOptions["hiddenMetrics"];
   /**
@@ -145,7 +145,15 @@ export function TrendsRow({
   // v1.8.5 — derive the chart set from the briefing. No new fetch: the
   // briefing payload is already on the page (advisor cache), so this is
   // a pure read that respects the v1.8.3 anti-freeze contract.
-  const charts = selectTrendCharts(briefing, { hiddenMetrics });
+  //
+  // A slot whose module is off is left out and the next eligible metric fills
+  // it (`trend:*` in the surface map). The mount-pinned account keeps the
+  // hydration render identical to the server's, which had no account.
+  const account = useAccountOnceMounted();
+  const charts = selectTrendCharts(briefing, {
+    modules: account?.modules,
+    hiddenMetrics,
+  });
 
   // v1.4.36 W2 T3 — derive the tri-state status per metric from the
   // advisor's loading flag + the annotation presence. Pending wins