feat: ship production deploy, Playwright e2e, and agent implementer

Add Docker atomic deploy tooling, CI, Playwright smoke/visual suite,
shared industrial theme, physics invariants, quality-mode wiring,
and a worktree-isolated agent implementer MVP with hard safety limits.

Co-authored-by: Cursor <cursoragent@cursor.com>

e2e/visual.spec.ts

@@ -0,0 +1,20 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('visual regression', () => {
+  test('home idle HUD panel', async ({ page }) => {
+    await page.goto('/');
+    await expect(page.locator('canvas')).toBeVisible({ timeout: 60_000 });
+
+    const hud = page.getByTestId('demo-hud');
+    await expect(hud).toBeVisible();
+    // Wait for idle classification proof row / stable HUD text
+    await expect(page.getByTestId('demo-command')).toHaveText('IDLE');
+    await expect(page.getByTestId('demo-case-label')).toHaveText('1/10');
+
+    // Snapshot HUD only — avoids flaky WebGL canvas pixels
+    await expect(hud).toHaveScreenshot('home-idle-hud.png', {
+      threshold: 0.3,
+      maxDiffPixelRatio: 0.05,
+    });
+  });
+});