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.

backend/pyproject.toml

@@ -0,0 +1,27 @@
+[project]
+name = "wq-alpha-system"
+version = "0.1.0"
+description = "Personal WorldQuant Alpha research workspace"
+requires-python = ">=3.12,<3.13"
+dependencies = [
+  "fastapi>=0.115,<1", "uvicorn[standard]>=0.34,<1",
+  "httpx>=0.28,<1", "sqlalchemy[asyncio]>=2.0.38,<2.1",
+  "asyncpg>=0.30,<1", "alembic>=1.15,<2",
+  "pydantic-settings>=2.8,<3", "cryptography>=44,<50", "argon2-cffi>=23.1,<26"
+]
+
+[dependency-groups]
+dev = ["pytest>=8,<10", "pytest-asyncio>=0.25,<2", "aiosqlite>=0.21,<1", "ruff>=0.11,<1"]
+
+[tool.pytest.ini_options]
+asyncio_mode = "auto"
+testpaths = ["tests"]
+pythonpath = ["."]
+
+[tool.ruff]
+target-version = "py312"
+line-length = 110
+
+[tool.ruff.lint]
+select = ["E", "F", "I"]
+ignore = ["E501"]