feat(admin): activity resource (read-only debug feed)

Last resource lands. /admin/activity tails the activity table —
votes, RSVPs, office-hour bookings, roadmap ships, pulse opens —
with last-7-days / last-30-days filters. Pure read view: no form,
no summary, no ops.

src/admin/components/ResourceListView.astro: rows fall back to <div>
when the resource has no panel pathway (form: null AND no summary).
Activity rows aren't clickable now — previously they'd dirty the URL
with a ?edit= that resolved to nothing.

The registry is complete: 7 resources across 3 groups, matching the
sidebar layout described in the spec.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/admin/components/ResourceListView.astro

@@ -95,6 +95,10 @@ function withParams(overrides: Record<string, string | number | null>): string {
 const showNewButton = resource.form !== null && resource.ops.create !== undefined;
 const hasItems = allItems.length > 0;
 const hasMatches = pageItems.length > 0;
+// A row is only clickable when the panel has something to render — either an
+// editable form or a review summary. Pure debug resources (activity) skip the
+// anchor wrapper so clicks don't dirty the URL with a ?edit= that goes nowhere.
+const rowsClickable = resource.form !== null || resource.summary !== undefined;
 ---
 
 <section class="bs-list">
@@ -162,19 +166,21 @@ const hasMatches = pageItems.length > 0;
       </div>
       {pageItems.map((item) => {
         const id = Number(item.id);
+        const Tag = rowsClickable ? 'a' : 'div';
+        const linkProps = rowsClickable
+          ? {
+              href: withParams({ edit: id, new: null }),
+              'aria-label': `Open ${resource.singularLabel.toLowerCase()} ${id}`,
+            }
+          : {};
         return (
-          <a
-            href={withParams({ edit: id, new: null })}
-            class="bs-grid-row"
-            role="row"
-            aria-label={`Edit ${resource.singularLabel.toLowerCase()} ${id}`}
-          >
+          <Tag class="bs-grid-row" role="row" {...linkProps}>
             {columns.map((col) => (
               <div class="bs-grid-td" role="cell">
                 <ListCell column={col} item={item} />
               </div>
             ))}
-          </a>
+          </Tag>
         );
       })}
     </div>

src/admin/resources/activity.ts

@@ -0,0 +1,102 @@
+/* ---------------------------------------------------------------------------
+ * Activity resource — read-only debug feed.
+ *
+ * Activity rows are emitted by side effects elsewhere in the app (voting,
+ * RSVPs, roadmap-ship transitions, pulse opens). The admin view is a tail
+ * of the table for monitoring; no create, no edit, no delete.
+ * ------------------------------------------------------------------------- */
+
+import {
+  getAllActivityForAdmin,
+  type ActivityKind,
+  type ActivityRow,
+} from '../../lib/db';
+import type { Resource } from '../resource-types';
+
+const KIND_LABEL: Record<ActivityKind, string> = {
+  voted: 'Voted',
+  rsvped: 'RSVPed',
+  booked_office_hours: 'Booked office hours',
+  roadmap_shipped: 'Roadmap shipped',
+  pulse_opened: 'Pulse opened',
+};
+
+const KIND_PILL_CLASS: Record<ActivityKind, string> = {
+  voted: 'pill-update',
+  rsvped: 'pill-published',
+  booked_office_hours: 'pill-bts',
+  roadmap_shipped: 'pill-shipping',
+  pulse_opened: 'pill-pending',
+};
+
+const DAY_MS = 24 * 60 * 60 * 1000;
+
+export const activityResource: Resource<ActivityRow> = {
+  key: 'activity',
+  label: 'Activity',
+  pluralLabel: 'Activity',
+  singularLabel: 'Event',
+  groupKey: 'system',
+  description: 'Recent member actions: votes, RSVPs, office-hour bookings, pulse opens, roadmap ships.',
+
+  list: {
+    queryFn: () => getAllActivityForAdmin(200),
+    columns: [
+      {
+        key: 'actor_name',
+        label: 'Actor',
+        primary: true,
+        width: '1.5fr',
+        render: (item) => ({
+          title: item.actor_name,
+          subtitle: item.actor_role,
+        }),
+      },
+      {
+        key: 'kind',
+        label: 'Kind',
+        kind: 'pill',
+        width: '160px',
+        pillVariants: Object.fromEntries(
+          (Object.keys(KIND_LABEL) as ActivityKind[]).map((k) => [
+            k,
+            { label: KIND_LABEL[k], class: KIND_PILL_CLASS[k] },
+          ]),
+        ),
+      },
+      {
+        key: 'subject',
+        label: 'Subject',
+        width: '1fr',
+        render: (item) => ({
+          title: `${item.subject_type} #${item.subject_id}`,
+        }),
+      },
+      {
+        key: 'created_at',
+        label: 'When',
+        kind: 'relative-date',
+        width: '120px',
+      },
+    ],
+    filters: [
+      { key: 'all', label: 'All', predicate: () => true, isDefault: true },
+      {
+        key: 'last_7_days',
+        label: 'Last 7 days',
+        predicate: (i) => Date.now() - new Date(i.created_at).getTime() < 7 * DAY_MS,
+      },
+      {
+        key: 'last_30_days',
+        label: 'Last 30 days',
+        predicate: (i) => Date.now() - new Date(i.created_at).getTime() < 30 * DAY_MS,
+      },
+    ],
+    defaultSort: { key: 'created_at', direction: 'desc' },
+    pageSize: 100,
+  },
+
+  // Pure read view — no form, no summary, no ops, no actions.
+  form: null,
+  ops: {},
+};

src/admin/resources/index.ts

@@ -12,6 +12,7 @@ import { eventsResource } from './events';
 import { usersResource } from './users';
 import { invitationsResource } from './invitations';
 import { joinRequestsResource } from './join-requests';
+import { activityResource } from './activity';
 
 export const groups: ResourceGroup[] = [
   {
@@ -24,5 +25,9 @@ export const groups: ResourceGroup[] = [
     label: 'The council',
     resources: [usersResource, invitationsResource, joinRequestsResource],
   },
-  { key: 'system', label: 'System', resources: [] },
+  {
+    key: 'system',
+    label: 'System',
+    resources: [activityResource],
+  },
 ];