OPT-27 review: the kept forecast line says "kept for tonight"

With battery modes off the forecast is still read and shown (Settings,
Simple, and the Forecast tab), but no plan uses it, so "used for tonight's
plan" was not true there (UX-53). "Kept for tonight" is true in every
shape. NL "vanavond" read wrong after midnight; "vannacht" covers the
whole night. DECISIONS' "modes off: nothing reads the sensors" corrected.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bdqr7PiaHcBnzPituu2yTC

goodwe_controller/DECISIONS/OPT-27-last-fresh-forecast-for-the-night.md

@@ -35,9 +35,10 @@ evening restart keeps it. It is written when a reading's figure changes or
 every 15 min (`SAVE_EVERY_S`), not on every poll. A damaged entry is dropped.
 
 **The screens.** `Forecast.kept` is true when a reading older than `FRESH_S` is
-in use; the forecast line then reads "Solar forecast read 17:05, used for
-tonight's plan." (`home_words.solar.kept`, EN and NL). The event log says
+in use; the forecast line then reads "Solar forecast read 17:05, kept for
+tonight." (`home_words.solar.kept`, EN and NL). The event log says
 "read, kept from 17:05".
 
-**Not changed.** Modes off (nothing reads the sensors). A forecast that stays
-fresh. The hold does not look at the weather, only at the clock and the day.
+**Not changed.** Control with modes off: it does not use the forecast. The
+screens still show the line, so it says "kept", not "used for the plan". A
+forecast that stays fresh. The hold does not look at the weather, only at the clock and the day.