test(e2e): change baseURL from HTTPS to HTTP for localhost testing (#548)

- Update playwright.config.ts baseURL from https://localhost:4859 to http://localhost:4859  
- Fixes SSL certificate in test environment  
- Aligns with actual dev server configuration which runs on HTTP：`playwright.config.ts:87`

playwright.config.ts

@@ -36,7 +36,7 @@ export default defineConfig({
     // baseURL: 'http://127.0.0.1:3000',
 
     // docs
-    baseURL: 'https://localhost:4859',
+    baseURL: 'http://localhost:4859',
 
     /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
     trace: 'on-first-retry',