Fix phenology: add date param + unpack tuple return

backend/api/routes/biology.py

@@ -3,9 +3,9 @@
 from __future__ import annotations
 
 import logging
+from datetime import date
 
-from fastapi import APIRouter, Depends
-from fastapi.responses import JSONResponse
+from fastapi import APIRouter, Depends, HTTPException
 
 from backend.api.deps import get_datahub
 from src.data.data_providers import DataHub
@@ -15,15 +15,20 @@ router = APIRouter()
 
 
 @router.get("/phenology")
-async def phenology(hub: DataHub = Depends(get_datahub)):
+async def phenology():
     """Current phenological stage (GDD-based)."""
     try:
         from src.models.phenology import estimate_stage_combined
-        stage = estimate_stage_combined()
-        return {"stage": stage.name if hasattr(stage, "name") else str(stage)}
+        stage, metadata = estimate_stage_combined(d=date.today())
+        return {
+            "stage": stage.id,
+            "label": stage.label,
+            "description": stage.description,
+            "method": metadata.get("method", "calendar"),
+        }
     except Exception as exc:
-        log.error("Phenology estimation failed: %s", exc)
-        return JSONResponse(status_code=500, content={"error": "Phenology estimation failed"})
+        log.error("Phenology estimation failed: %s", exc, exc_info=True)
+        raise HTTPException(status_code=500, detail=f"Phenology estimation failed: {exc}")
 
 
 @router.get("/rules")