fix(client): work through the findings from the coverage pass

214 items came out of writing the tests. Real defects are corrected, dead code
is removed rather than covered, and the tests that pinned the old behaviour
move with them.

Also drops two agent coverage scratch files that slipped into the coverage PR
and adds the ignore rule that keeps them out.

client/tests/unit/mobile/admin/MAdminPluginsPanel.test.tsx

@@ -490,6 +490,21 @@ describe('MAdminPluginsPanel — the registry detail sheet', () => {
     expect(screen.queryByText('Connects to')).not.toBeInTheDocument();
   });
 
+  it('FE-MOB-PLUGP-092: the manifest capabilities are chipped before the install decision', async () => {
+    await openDetail({
+      ...registryEntry(),
+      size: null,
+      publishedAt: null,
+      manifest: {
+        ...manifest,
+        capabilities: { widget: { slot: 'hero' }, tripPage: { replaces: ['places'] } },
+      },
+    });
+
+    expect(await screen.findByText('Replaces planner tabs')).toBeInTheDocument();
+    expect(screen.getByText('Boarding-pass widget')).toBeInTheDocument();
+  });
+
   it('FE-MOB-PLUGP-030: a failed detail fetch is reported inside the sheet', async () => {
     mockPanel([], [registryEntry()]);
     server.use(http.get('*/api/admin/plugins/registry/trek-gotify', () =>