dalsi pokus o load first

backend/services/planning_engine.py

@@ -1031,6 +1031,9 @@ def solve_dispatch(
             prob += bc_pv[t] + ge_pv[t] <= pv_sp[t]
             # Import na deficit po PV→load, nebo na grid-nabíjení (bc_gi).
             prob += gi[t] <= load_site_expr + bc_gi[t]
+            # Vybíjení do domu až po pv_ld (Deye load-first); v exportních slotech smí bd→síť.
+            if t not in discharge_export_slots:
+                prob += bd[t] <= load_site_expr - pv_ld[t]
             # Plná bilance (pv_ld+pv_sp rozpad je ortogonální k tokům přebytku).
             prob += (
                 pv_a_net + pv_b_effective + gi[t] + bd[t]
@@ -1479,6 +1482,7 @@ def solve_dispatch(
                 "planner_daytime_charge_target_enabled": daytime_en,
                 "planner_charge_commitment_penalty_czk_kwh": float(commit_pen),
             },
+            "load_first_enabled": om == "AUTO",
             "charge_acquisition_buy_czk_kwh": charge_acquisition_czk_kwh,
             "charge_acquisition_cutoff_at": (
                 slots[0].charge_acquisition_cutoff_at.isoformat()