UX-08 2c review: unit settings anchor to inverters, plainer texts

- messages.setting() for one inverter in the list reads
  “Inverter rating” for inverter-b (inverters.max_w), so the config panel
  files per-unit reasons under `inverters`, where the value is changed.
- The tariff card and plausibility reasons name
  “Distribution, levies and VAT” (price_taxes_eur_kwh) again.
- The wrong-direction reasons say "safety stop", the sign_disagree_w
  option says what it protects, and the roster, price-entity,
  integrator_max_w and capacity_kwh texts read more plainly.
- NL: stuurprint -> stuurmodule, "De piekbeperking".

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

goodwe_controller/DECISIONS/UX-08-short-notifications.md

@@ -40,7 +40,7 @@ Every row of the Commissioning list and every banner is now in `app/messages.py`
 
 Validator refusals, the parse errors they carry, and every option name and description are now short. No rule, key, schema, default or exit code changed. Over 36 spoiled configurations the old and new validators refuse the same number of times. The allowlist went from 167 entries to 43, and only log lines (phase 2d) remain on it.
 
-1. **A refusal names the setting by its label and then its key**, as `messages.setting()` writes it: “Inverter rating” (max_w). The key has to stay, because `configui.problems_by_field()` shows a reason beside every key its text names. A test checks each label against en.yaml. A few reasons no longer mention keys they only named in passing, such as `price_markup_eur_kwh` in the withdrawn-provider reason, so the panel shows those reasons beside fewer settings.
+1. **A refusal names the setting by its label and then its key**, as `messages.setting()` writes it: “Inverter rating” (max_w). The key has to stay, because `configui.problems_by_field()` shows a reason beside every key its text names. A test checks each label against en.yaml. A few reasons no longer mention keys they only named in passing, such as `price_markup_eur_kwh` in the withdrawn-provider reason, so the panel shows those reasons beside fewer settings. Each reason still names the setting that fixes it. A setting of one inverter in the list is written “Inverter rating” for inverter-b (inverters.max_w), so the panel shows it beside `inverters`, where that value is changed, and not only beside the flat `max_w` that a list does not read.
 2. **Citations moved to DOCS.** Option descriptions say "Measured value, leave it unchanged" or similar, and the record behind the value is under "For installers: where the numbers come from". The UX-01 citation check in `test_translations.py` now checks the tab for that instruction and DOCS for the record.
 3. **What left the refusals:** the shipped default in the peak-reserve reason, the superseded-default note in the levy-table reason (DOCS already covers it), the endpoints of the withdrawn providers (DOCS "Energy price providers"), the plant measurement behind `slew_w` (DOCS, beside the setting), and the leg-specific paragraphs of the tariff-formula errors. Each reason keeps the rejected value, the limit and what to change.
 4. **Not rewritten:** errors that only a code defect can raise, such as plugin-contract and argument-type checks in `price.py`, `price_forecast.py`, `static_tariff.py`, `arbitrage.py` and `main.py`, which a home owner never reads. INFO lines such as the tariff-formula preview were also left.