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.

goodwe_controller/DOCS.md

@@ -557,7 +557,7 @@ With battery modes on, these choices replace the *Charging and selling on price*
 - The plan is checked every 15 minutes. A planned level moves only by 1 kWh or 10 %, so a wobbling forecast does not flip it.
 - No forecast, one older than 3 hours or from before midnight, or no house use yet: *Leftover solar* takes solar only and *Cheap hours only* fills to the top level. The Batteries screen says so.
 - A battery needs its capacity (`inverters.capacity_kwh`) for a plan.
-- **At night.** Some forecasts stop updating in the evening (Forecast.Solar does). The add-on keeps the last reading of each sensor and uses it for that night's plan: from 20:00 until 03:00, or until a newer reading comes. A sensor that is missing for up to 3 hours is covered the same way. A figure is never used for another day, and never older than that night. The Batteries screen says "Solar forecast read 17:05, used for tonight's plan." With no reading all day, the night run still needs the wider gap.
+- **At night.** Some forecasts stop updating in the evening (Forecast.Solar does). The add-on keeps the last reading of each sensor and uses it for that night's plan: from 20:00 until 03:00, or until a newer reading comes. A sensor that is missing for up to 3 hours is covered the same way. A figure is never used for another day, and never older than that night. The Batteries screen says "Solar forecast read 17:05, kept for tonight." With no reading all day, the night run still needs the wider gap.
 
 **What always comes first.**
 - The peak limit, the safety stops and the monthly cycle come before a battery's mode.

goodwe_controller/app/ui_text/en.json

@@ -360,7 +360,7 @@
       "tops_up": "It charges from the grid to {pct}. That covers {kwh} of expensive hours the sun will not.",
       "no_forecast": "No solar forecast, so it charges from solar only."
     },
-    "solar": {"line": "Solar still to come today: {kwh}, we count on {count}. Updated {at}.", "uncovered": "The expensive hours need more than Leftover solar can hold. The rest, {kwh}, comes from another battery or the grid.", "kept": "Solar forecast read {at}, used for tonight's plan.", "no_forecast": "No solar forecast now, so Leftover solar charges from solar only.", "learning": "The add-on is learning your house's use. The plan starts after one full day."},
+    "solar": {"line": "Solar still to come today: {kwh}, we count on {count}. Updated {at}.", "uncovered": "The expensive hours need more than Leftover solar can hold. The rest, {kwh}, comes from another battery or the grid.", "kept": "Solar forecast read {at}, kept for tonight.", "no_forecast": "No solar forecast now, so Leftover solar charges from solar only.", "learning": "The add-on is learning your house's use. The plan starts after one full day."},
     "today": {
       "not_planned": "Not planned yet.",
       "no_runs": "No cheap or expensive hours left today.",

goodwe_controller/app/ui_text/nl.json

@@ -300,7 +300,7 @@
       "tops_up": "Ze laadt van het net tot {pct}. Dat dekt {kwh} dat de zon in dure uren niet levert.",
       "no_forecast": "Geen zonneprognose, dus ze laadt alleen met zonne-energie."
     },
-    "solar": {"line": "Nog verwachte zon vandaag: {kwh}, we rekenen op {count}. Bijgewerkt om {at}.", "uncovered": "De dure uren vragen meer dan Overschot zonne-energie kan opslaan. De rest, {kwh}, komt van een andere batterij of het net.", "kept": "Zonneprognose van {at}, gebruikt voor het plan van vanavond.", "no_forecast": "Nu geen zonneprognose, dus Overschot zonne-energie laadt alleen met zon.", "learning": "De add-on leert eerst het verbruik van uw huis. Het plan start na één volle dag."},
+    "solar": {"line": "Nog verwachte zon vandaag: {kwh}, we rekenen op {count}. Bijgewerkt om {at}.", "uncovered": "De dure uren vragen meer dan Overschot zonne-energie kan opslaan. De rest, {kwh}, komt van een andere batterij of het net.", "kept": "Zonneprognose van {at}, bewaard voor vannacht.", "no_forecast": "Nu geen zonneprognose, dus Overschot zonne-energie laadt alleen met zon.", "learning": "De add-on leert eerst het verbruik van uw huis. Het plan start na één volle dag."},
     "today": {
       "not_planned": "Nog niet gepland.",
       "no_runs": "Vandaag geen goedkope of dure uren meer.",

goodwe_controller/test_opt27.py

@@ -21,8 +21,8 @@ DECISIONS/OPT-27-last-fresh-forecast-for-the-night.md.
    c. an evening restart keeps it (a new Controller on the saved store);
    d. a one-hour outage at 18:47 does not drop it;
    e. past midnight + 3 h the figure is not used, before it it is.
-3. The screens: the forecast line says when it was read and that it is used
-   for tonight's plan (EN and NL), and Home agrees with control.
+3. The screens: the forecast line says when it was read and that it is kept
+   for tonight (EN and NL), and Home agrees with control.
 
 Mutations (MUTATION.md, purged copies, graded over this file): see the
 DECISIONS note and the dev report.
@@ -539,9 +539,8 @@ check("... and the level, the grid need, the shortfall and the sun counted "
 print("\n3. The screens")
 blk = ca.block
 print(f"    forecast line: {blk['line']!r} (state {blk['state']})")
-check("the forecast line says when it was read and that it is used for "
-      "tonight's plan", blk["line"] == "Solar forecast read 17:05, used for "
-      "tonight's plan.")
+check("the forecast line says when it was read and that it is kept for "
+      "tonight", blk["line"] == "Solar forecast read 17:05, kept for tonight.")
 check("the same line comes from the Forecast tab (dayview) on today",
       homeview.line_solar(0.4, 0.3, "17:05", kept=True) == blk["line"]
       and homeview.line_solar(0.4, 0.3, "17:05").startswith(
@@ -555,7 +554,7 @@ k_nl = nl["home_words"]["solar"]["kept"]
 print(f"    EN {k_en!r}\n    NL {k_nl!r}")
 check("EN and NL both say it, with the time, and the NL is not the English",
       "{at}" in k_en and "{at}" in k_nl and k_en != k_nl
-      and "plan" in k_en and "vanavond" in k_nl)
+      and "tonight" in k_en and "vannacht" in k_nl)
 check("a daytime reading keeps the old line (daytime unchanged)",
       "Updated 09:05" in homeview.line_solar(1.0, 0.7, "09:05")
       and "Bijgewerkt" in json.dumps(nl["home_words"]["solar"]["line"]))