feat(admin): client admin page with project picker toggles

Phase 9b Task 1. /admin/clients/[clientId] shows the client's active
projects with a 'List on request page' toggle next to each. The
existing /admin/clients list now links each client name into the new
page.

Request-links panel placeholder; Task 2 wires the real
<IntakeLinksPanel mode='client'> here.

src/app/admin/clients/[clientId]/page.tsx

@@ -0,0 +1,101 @@
+import { notFound } from "next/navigation";
+
+import { AppShell } from "@/components/shell/app-shell";
+import { TopBar } from "@/components/shell/top-bar";
+import { ShowInIntakeToggle } from "@/components/admin/show-in-intake-toggle";
+import { getAdminPb } from "@/lib/pb/admin";
+import type { ClientRecord, ProjectRecord } from "@/lib/pb/types";
+
+/**
+ * Per-client request-link admin page.
+ *
+ * Two stacked panels: a Request-links panel (the same component Phase 8
+ * shipped for the project page, now bound to client instead — wired in
+ * Task 2) and a Projects list with the "List on request page" toggle
+ * next to each.
+ *
+ * The Phase 8 /admin/projects/[projectId] page keeps its own
+ * Request-links panel for the legacy per-project link shape. The picker
+ * is the new default; the legacy path is for owners who haven't
+ * migrated yet.
+ *
+ * Owner-only by virtue of the admin layout, which is already enforced
+ * upstream.
+ */
+export default async function ClientAdminPage({
+  params,
+}: {
+  params: Promise<{ clientId: string }>;
+}) {
+  const { clientId } = await params;
+
+  const pb = await getAdminPb();
+
+  let client: ClientRecord;
+  try {
+    client = await pb.collection("clients").getOne<ClientRecord>(clientId);
+  } catch {
+    notFound();
+  }
+
+  const projects = await pb
+    .collection("projects")
+    .getFullList<ProjectRecord>({
+      filter: `client = "${clientId}" && status != "archived"`,
+      sort: "name",
+    });
+
+  return (
+    <AppShell role="owner" currentPath="/admin/clients">
+      <TopBar title={client.name} subtitle="Request links and project picker">
+        <span className="text-xs text-text-muted">
+          <code>{client.slug}</code>
+        </span>
+      </TopBar>
+
+      <div className="flex-1 overflow-y-auto p-6">
+        <div className="mx-auto max-w-2xl space-y-4">
+          <section className="rounded-[var(--radius-tile)] border border-border-subtle p-4 text-xs text-text-muted">
+            Request links panel lands in Task 2.
+          </section>
+
+          <section className="space-y-3 rounded-[var(--radius-tile)] border border-border-subtle p-4">
+            <div>
+              <h2 className="text-sm font-semibold text-text-primary">
+                Projects
+              </h2>
+              <p className="mt-0.5 text-xs text-text-muted">
+                Each project is hidden from the public request page by
+                default. Flip the toggle to show it.
+              </p>
+            </div>
+            <ul className="space-y-2">
+              {projects.map((p) => (
+                <li
+                  key={p.id}
+                  className="flex items-center justify-between gap-3 rounded-lg border border-border-subtle p-3"
+                >
+                  <div className="min-w-0">
+                    <div className="text-sm text-text-primary">{p.name}</div>
+                    <div className="text-xs text-text-muted">
+                      <code>{p.slug}</code> · {p.status}
+                    </div>
+                  </div>
+                  <ShowInIntakeToggle
+                    projectId={p.id}
+                    initial={Boolean(p.show_in_intake)}
+                  />
+                </li>
+              ))}
+              {projects.length === 0 && (
+                <li className="text-xs text-text-muted">
+                  No projects yet for this client.
+                </li>
+              )}
+            </ul>
+          </section>
+        </div>
+      </div>
+    </AppShell>
+  );
+}

src/app/admin/clients/page.tsx

@@ -1,3 +1,5 @@
+import Link from "next/link";
+
 import { AppShell } from "@/components/shell/app-shell";
 import { TopBar } from "@/components/shell/top-bar";
 import { AdminTable, AdminCell } from "@/components/admin/admin-table";
@@ -23,15 +25,18 @@ export default async function AdminClientsPage() {
             <tr key={client.id}>
               <AdminCell>
                 <div className="flex items-center gap-2.5">
-                  <span
-                    aria-hidden
-                    className="h-2.5 w-2.5 rounded-full"
-                    style={{ background: client.brand_color || "var(--brand)" }}
-                  />
-                  <span className="font-medium text-text-primary">
-                    {client.name}
-                  </span>
-                  <code className="text-xs text-text-muted">{client.slug}</code>
+                <span
+                  aria-hidden
+                  className="h-2.5 w-2.5 rounded-full"
+                  style={{ background: client.brand_color || "var(--brand)" }}
+                />
+                <Link
+                  href={`/admin/clients/${client.id}`}
+                  className="font-medium text-text-primary hover:underline"
+                >
+                  {client.name}
+                </Link>
+                <code className="text-xs text-text-muted">{client.slug}</code>
                 </div>
               </AdminCell>
               <AdminCell className="tabular">{projectCount}</AdminCell>