Merge release/1.0 (SAFETY-78, #154) into opt11-p4-solar-forecast

Conflicts: modetrade.decide() takes both the day plan (targets) and
SAFETY-78's draining flag; the Why line keeps SAFETY-78's other_cycle
ahead of the plan's word (test added).

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

goodwe_controller/test_batteries_screen.py

@@ -93,7 +93,8 @@ WANT = {
     "off": ("solar_first", "off"),
     "off_peak": ("peak", "off_peak"),
     "refusal": ("refuses_give", "other_refuses"),
-    "maint": ("cycle_mode", "leftover"),
+    # SAFETY-78: the other battery says why it does not charge.
+    "maint": ("cycle_mode", "other_cycle"),
 }
 
 # ============================================================================ #
@@ -326,6 +327,16 @@ _cases = [
      "no_forecast"),
     (dict(mode=packmode.LEFTOVER_SOLAR, role="charge", day="tops_up"),
      "grid_charge"),
+    # SAFETY-78: another battery drains for its monthly cycle.
+    (dict(other_cycle="A"), "other_cycle"),
+    (dict(other_cycle="A", modes_on=False, giving=True), "other_cycle"),
+    (dict(other_cycle="A", mode=packmode.CHEAP_HOURS, role="charge"),
+     "other_cycle"),
+    (dict(other_cycle="A", peak=True), "peak"),
+    (dict(other_cycle="A", refused=-1), "refuses_charge"),
+    (dict(other_cycle="A", off=True), "off"),
+    (dict(other_cycle="A", mode=packmode.LEFTOVER_SOLAR, role="hold",
+          day="tops_up"), "other_cycle"),
 ]
 _wrong = [(kw, want, why(**kw)) for kw, want in _cases if why(**kw) != want]
 print(f"    {_wrong}")