OPT-11 P3, owner option A: selling off, Leftover solar takes solar only

Owner decision 2026-09-29. Selling is off until it can be judged on the price
the grid pays: packmode.SELLING_ENABLED = False makes read() answer
sell=False whatever the store holds, pack_sell is refused ("Selling is off
for now."), and the page has no selling switch; the sell code stays. Until
the P4 forecast, only Cheap hours only charges from the grid
(packmode.GRID_CHARGE_MODES); Leftover solar holds and gives in the
expensive runs. Help, Today and plan lines, DOCS and DECISIONS follow.
Replay, 16 days: Solar first + Leftover solar 19.44 EUR net (P2 19.33).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

goodwe_controller/app/modetrade.py

@@ -44,7 +44,8 @@ Rules that keep this safe (tests: test_modes_p3.py):
 
 from dataclasses import dataclass
 
-from .packmode import CHEAP_HOURS, LEFTOVER_SOLAR, SOLAR_FIRST
+from .packmode import (CHEAP_HOURS, GRID_CHARGE_MODES, LEFTOVER_SOLAR,
+                       SOLAR_FIRST)
 
 OFF, HOUSE, HOLD, GIVE, SELL, CHARGE, REST = (
     "off", "house", "hold", "give", "sell", "charge", "rest")
@@ -88,10 +89,10 @@ def _room_kwh(p: Pack, pct: float) -> float:
 
 
 def chargers(packs, ceiling_pct, done=()) -> list:
-    """Batteries that may charge from the grid in a cheap run (P3: no
-    forecast, so Leftover solar acts as Cheap hours only; owner answer 4)."""
+    """Batteries that may charge from the grid in a cheap run: the modes in
+    `packmode.GRID_CHARGE_MODES` (Cheap hours only until P4's forecast)."""
     return [p for p in packs
-            if p.use and p.idle and p.live and p.mode in PRICE_MODES
+            if p.use and p.idle and p.live and p.mode in GRID_CHARGE_MODES
             and p.soc is not None and p.soc < ceiling_pct
             and p.refused >= 0 and p.name not in done]