Fix inconsistent reuseExistingServer in tanstack web server config

Set reuseExistingServer to false for tanstack to match nextjs and react-router configurations, preventing stale in-memory test data from causing flaky test failures.

Author: cursoragent

e2e/playwright.codegen.config.ts

@@ -74,7 +74,7 @@ const allWebServers = [
 		config: {
 			command: "pnpm -F tanstack run start:e2e",
 			port: 3007,
-			reuseExistingServer: true,
+			reuseExistingServer: false,
 			timeout: 300_000,
 			stdout: "pipe" as const,
 			stderr: "pipe" as const,