OPT-23-28 review: the unheld-shortfall line says another battery or the grid

With A on Leftover solar and B on Cheap hours (the dynamic scenario, and the
owner's planned setup), the line said "The batteries cannot hold it all. The
grid covers N kWh", while B holds a full charge for the same hours. It now
says "The expensive hours need more than Leftover solar can hold. The rest,
N kWh, comes from another battery or the grid." (NL likewise). DOCS,
DECISIONS and the dayplan/homeview docstrings say the same. Text only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bdqr7PiaHcBnzPituu2yTC

goodwe_controller/app/homeview.py

@@ -1446,7 +1446,8 @@ def line_solar(fc_kwh, count_kwh, at) -> str:
 
 
 def line_uncovered(kwh) -> str:
-    """OPT-28: the batteries cannot hold the expensive hours' shortfall."""
+    """OPT-28: the Leftover solar batteries cannot hold the expensive hours'
+    shortfall. The rest comes from another battery or the grid."""
     return _t("solar.uncovered", kwh=_kwh(kwh))