feat: persist settings and enrich conversation context

tests/dashboard/settings.test.tsx

@@ -16,6 +16,7 @@ const config = {
   reddit: { prioritizeRecentPosts: false, recentWindowMinutes: 60 },
   subreddits: [{ name: 'casualconversation', type: 'chat', weight: 2, tone: 'default' }],
   tones: ['default', 'dominant', 'submissive', 'playful', 'direct', 'gentle', 'kink-friendly', 'teasing'],
+  advanced: { openrouter: { chatModel: 'example/chat-model' } },
 };
 
 const server = setupServer();
@@ -228,6 +229,25 @@ describe('settings and access', () => {
     expect(updateRequests).toBe(1);
   });
 
+  it('validates advanced application JSON before saving', async () => {
+    installConfigApi();
+    let updateRequests = 0;
+    server.use(http.put('/api/config', () => {
+      updateRequests += 1;
+      return HttpResponse.json({ success: true, config, subreddits: config.subreddits });
+    }));
+    const user = userEvent.setup();
+    renderSettings('/settings?section=behaviour');
+
+    const editor = await screen.findByRole('textbox', { name: 'Advanced configuration JSON' });
+    await user.clear(editor);
+    await user.type(editor, 'invalid');
+    await user.click(screen.getByRole('button', { name: 'Save settings' }));
+
+    expect(screen.getByText('Advanced configuration is not valid JSON.')).toBeInTheDocument();
+    expect(updateRequests).toBe(0);
+  });
+
   it('confirms unusually large hourly limits', async () => {
     installConfigApi();
     let updateRequests = 0;
@@ -287,6 +307,10 @@ describe('settings and access', () => {
     expect(importRequests).toBe(1);
     expect(await screen.findByText('Authenticated')).toBeInTheDocument();
     expect(screen.getByText(/u\/example-account/)).toBeInTheDocument();
+    expect(screen.getByRole('link', { name: 'u/example-account' })).toHaveAttribute(
+      'href',
+      'https://www.reddit.com/u/example-account',
+    );
 
     await user.click(screen.getByRole('button', { name: 'Recheck session' }));
     expect(statusRequests).toBeGreaterThanOrEqual(2);