UX-10: the last plain-language leftovers: log lines, two table rows, 'Why: Other', red at 0 s

- test_messages.py part 6: every dynamic part of a WARNING+ line is classified
  as data or as a built text, and every built text is produced by the real
  code and checked. This is the gap the 2d scan had: it counted `%s` as one
  word, so reasons built by loop_clamp_note() and friends were never seen.
- Quoted reasons rewritten to STYLE.md (red-alarm shape, codes kept):
  OUTPUT_CLAMP, METER_FROZEN, CIRCULATING_POWER, STALE_READING, the peak
  guard (codes now PEAK_GUARD*), the migration report, price feed, price
  history and gate reasons. Plurals via messages.times()/count().
- Top table: Price history "96 prices over 24 hours for 26 Sep", Tariff
  "one every 15 minutes or every hour", "not final yet" dropped.
- Levels and noise: per-cycle shadow line DEBUG, shadow on/off INFO,
  aiohttp access log only at log level debug, settings warnings once per
  start, one plain line per Home Assistant outage (hass.Outage).
- INFO jargon and error texts: no "§8.3", ISO times, "banked", "keys ARE",
  "NOT_OBSERVED", "did NOT land", "AND".
- Display bugs: WHY_WINNER covers every winner and safety reason
  (main.why_key(), part 7 finds them in the code); the meter row is amber
  "waiting for the first reading" inside its limit after a start; the
  missing-reading age is counted when the page asks.
- STYLE.md and DECISIONS/UX-08-short-notifications.md (UX-10 section).

No change to safety behaviour, alarm levels, notification ids, triggers,
cadence or the banner cascade. One row colour changes (meter at start),
justified in DECISIONS.

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

goodwe_controller/test_price_forecast.py

@@ -66,6 +66,7 @@ import sys
 from named_absence import first, nth
 from datetime import datetime, timedelta, timezone
 
+from app import messages as _msg_fc
 from app import price as _price
 from app import price_forecast as _fc
 from app import static_tariff as _st
@@ -668,8 +669,10 @@ check("with neither a published hour nor a yesterday, the result is no_data - "
 check("...so it has no .points to iterate and no .get() to default out of",
       raises(lambda: _nothing.points, Absence)
       and raises(lambda: _nothing.get("points", []), Absence))
-check("...and its reason names §11.4 for an operator",
-      "§11.4" in _nothing.reason)
+check("...and its reason says the fixed tariff is used and there is no "
+      "trading (§11.4), in words an operator reads",
+      "fixed tariff is used" in _nothing.reason
+      and "no trading" in _nothing.reason)
 check("a naive `since` is refused rather than silently interpreted as UTC",
       raises(lambda: fill_from_yesterday(TODAY_PART, yesterday=YESTERDAY,
                                          since=datetime(2026, 1, 15),
@@ -745,9 +748,10 @@ check("...and the phase machine did not move: it is still idle, so the "
       _m.phase == IDLE)
 check("...and the reason names §8.3, the offending hour, and when the real "
       "price is expected",
-      "§8.3" in _gate_bad.reason
-      and bool(_first_prov) and _first_prov.isoformat() in _gate_bad.reason
-      and "14-16" in _gate_bad.reason)
+      "is only estimated" in _gate_bad.reason
+      and bool(_first_prov)
+      and _msg_fc.when(brussels(_first_prov)) in _gate_bad.reason
+      and "14:00 to 16:00" in _gate_bad.reason)
 
 # The positive arm, so the block above is discriminating rather than universal.
 _firm_long = series_of(hours_between(START,
@@ -772,7 +776,8 @@ _gate_none = begin_phase(_m3, START, PriceRead.no_data("the feed timed out"),
                          MAINTENANCE_DRAIN)
 check("no price data at all BLOCKS an irreversible action too - a missing "
       "price is not a cheap one (§11.4)",
-      _gate_none.kind == "blocked" and "§11.4" in _gate_none.reason
+      _gate_none.kind == "blocked"
+      and "missing price is not a cheap one" in _gate_none.reason
       and _m3.phase == IDLE)
 _short = series_of(DAY[:4], lambda u: t_price(brussels(u).hour),
                    PriceProduct.DAY_AHEAD, "generic_dayahead",