feat: add time range and group filtering to insights page

- Add time range picker (7d/14d/30d) and group dropdown to insights
- Commands, MCP, Model Rankings, Plan Exhaustion filter by selected group
- Reorder sections: filtered content first, team-wide below a divider
- Update analytics API to accept group param, resolve to email filter
- Show member count badge on active filter in members table

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

Author: ofershap

src/app/api/analytics/route.ts

@@ -11,13 +11,36 @@ import {
   getAnalyticsClientVersionsSummary,
   getUsersByClientVersion,
   getPlanExhaustionStats,
+  getModelEfficiency,
+  getGroupsWithMembers,
 } from "@/lib/db";
 
 export const dynamic = "force-dynamic";
 
+function resolveGroupEmails(group: string): string[] | undefined {
+  if (!group || group === "all") return undefined;
+  const groups = getGroupsWithMembers();
+
+  if (group.startsWith("parent:")) {
+    const prefix = group.replace("parent:", "");
+    const emails = new Set<string>();
+    for (const g of groups) {
+      if (g.name === prefix || g.name.startsWith(prefix + " > ")) {
+        for (const e of g.emails) emails.add(e);
+      }
+    }
+    return emails.size > 0 ? [...emails] : undefined;
+  }
+
+  const found = groups.find((g) => g.id === group);
+  return found?.emails.length ? found.emails : undefined;
+}
+
 export function GET(request: Request) {
   const { searchParams } = new URL(request.url);
   const days = parseInt(searchParams.get("days") ?? "30", 10);
+  const group = searchParams.get("group") ?? "all";
+  const emails = resolveGroupEmails(group);
 
   try {
     return NextResponse.json({
@@ -26,12 +49,13 @@ export function GET(request: Request) {
       modelTrend: getAnalyticsModelUsageTrend(days),
       agentEdits: getAnalyticsAgentEditsTrend(days),
       tabs: getAnalyticsTabsTrend(days),
-      mcp: getAnalyticsMCPSummary(days),
-      commands: getAnalyticsCommandsSummary(days),
+      mcp: getAnalyticsMCPSummary(days, emails),
+      commands: getAnalyticsCommandsSummary(days, emails),
       fileExtensions: getAnalyticsFileExtensionsSummary(days),
       clientVersions: getAnalyticsClientVersionsSummary(),
       versionUsers: getUsersByClientVersion(),
-      planExhaustion: getPlanExhaustionStats(),
+      planExhaustion: getPlanExhaustionStats(emails),
+      modelEfficiency: getModelEfficiency(emails),
     });
   } catch {
     return NextResponse.json({ error: "No analytics data yet" }, { status: 404 });