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.

scripts/init_env.py

@@ -0,0 +1,25 @@
+"""Create deployment secrets locally, without printing or replacing existing secrets."""
+
+import argparse
+import base64
+import os
+import secrets
+from pathlib import Path
+
+parser = argparse.ArgumentParser()
+parser.add_argument("--output", type=Path, default=Path(__file__).resolve().parent.parent / ".env")
+args = parser.parse_args()
+content = "\n".join([
+    "ADMIN_USERNAME=admin",
+    f"ADMIN_PASSWORD={secrets.token_urlsafe(24)}",
+    f"POSTGRES_PASSWORD={secrets.token_hex(24)}",
+    f"ENCRYPTION_KEY={base64.urlsafe_b64encode(secrets.token_bytes(32)).decode()}",
+    "LOCAL_PORT=8080", "DOMAIN=alpha.example.com", "",
+])
+try:
+    fd = os.open(args.output, os.O_CREAT | os.O_EXCL | os.O_WRONLY, 0o600)
+except FileExistsError:
+    raise SystemExit(f"Already exists; left unchanged: {args.output}") from None
+with os.fdopen(fd, "w") as output:
+    output.write(content)
+print(f"Created {args.output}; read ADMIN_PASSWORD there for the initial login.")