Unify retained operation history in Activity

src/routes/activity/+page.server.ts

@@ -0,0 +1,6 @@
+import { parseActivityQuery } from '$lib/activity.js';
+import { activityHistory } from '$lib/server/activity.js';
+
+export function load({ url }: { url: URL }) {
+    return { activity: activityHistory(parseActivityQuery(url.searchParams)) };
+}

src/routes/activity/+page.svelte

@@ -0,0 +1,19 @@
+<script lang="ts">
+    import ActivityLog from '$ui/components/ActivityLog.svelte';
+    import Button from '$ui/components/primitives/Button.svelte';
+    import SectionHeader from '$ui/components/primitives/SectionHeader.svelte';
+    let { data }: { data: import('./$types').PageData } = $props();
+</script>
+
+<svelte:head><title>Activity · Electric Cherry</title></svelte:head>
+
+<div class="page">
+    <SectionHeader title="Activity" subtitle="Server operations, releases, maintenance, and host work in one history.">
+        {#snippet actions()}{#if data.user && data.user.role !== 'viewer'}<Button href="/provisioning">Manage servers</Button>{/if}{/snippet}
+    </SectionHeader>
+    <ActivityLog initial={data.activity} />
+</div>
+
+<style>
+    .page { display: grid; gap: var(--space-6); min-width: 0; }
+</style>