feat(ui): add activity log page backed by actions_log

app/dashboard/page.tsx

@@ -3,6 +3,7 @@ import { DashboardControls } from "@/components/dashboard/dashboard-controls";
 import { getServerAgencyContextOrRedirect } from "@/lib/agency";
 import type { Database } from "@/lib/types";
 import { createSupabaseServerClient } from "@/lib/supabase/server";
+import Link from "next/link";
 
 type AgencySummary = Pick<
   Database["public"]["Tables"]["agencies"]["Row"],
@@ -238,7 +239,15 @@ export default async function DashboardPage() {
           </h1>
           <p className="text-sm text-slate-600">Role: {context.role}</p>
         </div>
-        <SignOutButton />
+        <div className="flex items-center gap-3">
+          <Link
+            href="/dashboard/activity"
+            className="text-sm text-brand-700 underline"
+          >
+            Activity
+          </Link>
+          <SignOutButton />
+        </div>
       </header>
 
       <section className="grid gap-4 md:grid-cols-3">