feat: add initial frontend setup with styles, types, and testing framework

- Created a global CSS file for styling the frontend with responsive design.
- Introduced TypeScript types for various entities including Research, Alpha, and Account.
- Implemented Playwright tests for account management and data synchronization workflows.
- Configured TypeScript with strict settings and included necessary libraries.
- Set up Vite as the build tool with React plugin and API proxy configuration.
- Added a Python script to initialize environment variables securely.

.gitignore

@@ -0,0 +1,22 @@
+.env
+.env.*
+!.env.example
+**/.venv/
+**/__pycache__/
+**/.pytest_cache/
+**/.ruff_cache/
+**/*.pyc
+frontend/node_modules/
+frontend/dist/
+frontend/test-results/
+frontend/playwright-report/
+*.db
+*.dump
+.DS_Store
+.local/
+output/
+**/*.tsbuildinfo
+.playwright-cli/
+backups/
+
+account.json