fix ranniho neprodeje do site

backend/services/control/setpoints.py

@@ -96,6 +96,8 @@ def _build_setpoints(
         export_mode = str(export_mode_raw).strip().upper() if export_mode_raw is not None else None
         if export_mode == "NONE":
             export_limit = 0
+        elif export_limit <= 0 and grid_sp < 0:
+            export_limit = abs(grid_sp)
         # 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")
@@ -127,6 +129,7 @@ def _build_setpoints(
             ev2_power_w=ev2_w,
             target_soc_pct=target_soc,
             deye_physical_mode=pm,
+            export_mode=export_mode,
             export_ban=bool(export_ban),
             deye_gen_cutoff_enabled=bool(gen_cutoff),
             effective_sell_price_czk_kwh=sell_f,
@@ -214,6 +217,30 @@ def _deye_reg143_export_w(no_export: bool, max_export_power_w: int | None) -> in
     return max(0, int(max_export_power_w or 0))
 
 
+def _deye_reg142_limit_control(
+    *,
+    deye_mode: str,
+    grid_w: int,
+    export_ban: bool,
+    export_mode: str | None,
+    zero_export_mode: int,
+) -> int:
+    """
+    Reg 142: 0 = selling first, 1/2 = zero export (load / CT).
+    Plán s exportem (záporný grid_setpoint, bez export_ban) musí povolit prodej FVE do sítě
+    i v PASSIVE — jinak CT instalace (deye_zero_export_mode=2) drží přebytek v baterii.
+    """
+    if deye_mode == "SELL":
+        return 0
+    em = (export_mode or "").strip().upper()
+    if export_ban or em == "NONE" or grid_w >= 0:
+        return int(zero_export_mode)
+    if em in {"PV_SURPLUS", "BATTERY_SELL"}:
+        return 0
+    # starší řádky bez export_mode: záporný grid_setpoint = export záměr
+    return 0
+
+
 def _clamp_deye_tou_soc_pct(pct: int) -> int:
     return max(5, min(95, pct))