Initial commit: Brachnha Insight project setup

- Next.js 14+ with App Router and TypeScript
- Tailwind CSS and ShadCN UI styling
- Zustand state management
- Dexie.js for IndexedDB (local-first data)
- Auth.js v5 for authentication
- BMAD framework integration

Co-Authored-By: Claude <noreply@anthropic.com>

tests/e2e/chat-flow.spec.ts

@@ -0,0 +1,46 @@
+import { test, expect } from '@playwright/test';
+
+test('Chat Flow with Mocked LLM', async ({ page }) => {
+    // 1. Setup Mock API - must be set before navigation
+    await page.route('**/v1/chat/completions', async (route) => {
+        await route.fulfill({
+            status: 200,
+            contentType: 'application/json',
+            body: JSON.stringify({
+                choices: [{
+                    message: { content: "This is a mock AI response." }
+                }]
+            })
+        });
+    });
+
+    // 2. Configure Settings
+    await page.goto('/settings');
+    await page.getByLabel('API Key').fill('sk-test-key');
+    await page.getByLabel('Base URL').fill('https://api.mock.com/v1');
+    await page.getByLabel('Model Name').fill('gpt-mock');
+
+    // Wait for settings to be saved (Zustand persist uses localStorage)
+    await page.waitForTimeout(500);
+
+    // 3. Go to Chat
+    await page.goto('/chat');
+
+    // Wait for empty state to appear (indicates session is ready)
+    await expect(page.getByRole('heading', { name: /frustrating you/i })).toBeVisible({ timeout: 5000 });
+
+    // 4. Send Message
+    const input = page.getByRole('textbox');
+    await input.fill('I hate writing tests.');
+
+    // Wait for button to be enabled
+    const sendButton = page.getByRole('button').first();
+    await expect(sendButton).toBeEnabled({ timeout: 3000 });
+    await sendButton.click();
+
+    // 5. Verify User Message - wait for it to appear in the chat
+    await expect(page.getByText('I hate writing tests.')).toBeVisible({ timeout: 10000 });
+
+    // 6. Verify AI Response
+    await expect(page.getByText('This is a mock AI response.')).toBeVisible({ timeout: 15000 });
+});