refactor export limit semantics

backend/services/control/setpoints.py

@@ -81,6 +81,8 @@ def _build_setpoints(
         if pi is None:
             return None
         grid_sp = int(pi["grid_setpoint_w"] or 0)
+        export_limit_raw = pi.get("export_limit_w")
+        export_limit = int(export_limit_raw) if export_limit_raw is not None else abs(min(grid_sp, 0))
         ev1_w = int(pi["ev1_setpoint_w"] or 0) if "ev1_setpoint_w" in pi else 0
         ev2_w = int(pi["ev2_setpoint_w"] or 0) if "ev2_setpoint_w" in pi else 0
         hp_en = bool(pi["heat_pump_enabled"])
@@ -90,6 +92,10 @@ def _build_setpoints(
         pm: str | None = str(pm_raw).strip().upper() if pm_raw is not None else None
         sell_raw = pi.get("effective_sell_price")
         sell_f: float | None = float(sell_raw) if sell_raw is not None else None
+        export_mode_raw = pi.get("export_mode")
+        export_mode = str(export_mode_raw).strip().upper() if export_mode_raw is not None else None
+        if export_mode == "NONE":
+            export_limit = 0
         # Záporný výkup sám o sobě neblokuje export, pokud plán export explicitně žádá.
         export_ban = sell_f is not None and float(sell_f) < 0 and grid_sp >= 0
         gen_cutoff_raw = pi.get("deye_gen_cutoff_enabled")
@@ -112,7 +118,7 @@ def _build_setpoints(
                 pv_a_allowed = 0
         return ControlSetpoints(
             battery_w=int(pi["battery_setpoint_w"] or 0),
-            grid_export_limit=abs(min(grid_sp, 0)),
+            grid_export_limit=max(0, export_limit),
             ev1_current_a=watts_to_amps(ev1_w, phases=3),
             ev2_current_a=watts_to_amps(ev2_w, phases=1),
             heat_pump_enable=hp_en,