feat: RFCP MVP deployed on VPS

Iteration 1:
- Dark theme with 3-way toggle
- Dynamic heatmap gradient (blue→red)
- Radius up to 100km
- Save & Calculate workflow

Iteration 2:
- Terrain overlay toggle
- Batch height operations
- Zoom-dependent heatmap rendering

Infrastructure:
- Backend FastAPI on 8888
- Frontend static build via Caddy
- Systemd services
- Caddy reverse proxy integration

backend/venv/lib/python3.12/site-packages/fastapi/security/utils.py

@@ -0,0 +1,10 @@
+from typing import Optional
+
+
+def get_authorization_scheme_param(
+    authorization_header_value: Optional[str],
+) -> tuple[str, str]:
+    if not authorization_header_value:
+        return "", ""
+    scheme, _, param = authorization_header_value.partition(" ")
+    return scheme, param