chore: install Playwright and add E2E test configuration

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -11,10 +11,13 @@
 		"db:generate": "bunx drizzle-kit generate",
 		"db:push": "bunx drizzle-kit push",
 		"test": "bun test",
+		"test:e2e": "bunx playwright test",
+		"test:e2e:ui": "bunx playwright test --ui",
 		"lint": "bunx @biomejs/biome check ."
 	},
 	"devDependencies": {
 		"@biomejs/biome": "^2.4.7",
+		"@playwright/test": "^1.59.1",
 		"@tanstack/react-query-devtools": "^5.91.3",
 		"@tanstack/react-router-devtools": "^1.166.7",
 		"@tanstack/router-plugin": "^1.166.9",