PRICE-01 round 3: replace the fixed-tariff notification with a log line and a settings note

G1: remove the false 'Fixed tariff not used' notification. One INFO line at
start and an info note beside the setting (EN/NL) when price_service has a
non-blank static_profile; the old notification id is dismissed at start.
DOCS, migration step 5 and DECISIONS rule 7 now say what the code does.
S05: whitespace-only static_profile counts as not set.
G2: maintenance_enabled read through MaintConfig.from_options().

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

goodwe_controller/app/uipage.py

@@ -12,6 +12,7 @@ import copy
 import os
 import re
 
+from . import messages
 from . import uilayout as L
 from . import uitext
 from . import uimodel as U
@@ -247,7 +248,7 @@ def derive_messages(errors, problems, notes, model, keys, lang="en"):
     kept = [p for p in problems if p in kept]
     notes = [n for n in notes if not set(n.keys or ()) & failed]
     return ([derive_message(err, lang) for err in errors]
-            + anchors(kept, notes, model, keys))
+            + anchors(kept, notes, model, keys, lang))
 
 
 # --------------------------------------------------------------------------- #
@@ -292,9 +293,10 @@ def targets(key: str, text: str, model: dict) -> list:
     return [(None, None)]
 
 
-def anchors(problems, notes, model, keys) -> list:
+def anchors(problems, notes, model, keys, lang="en") -> list:
     """[{field, card, tier, text}] for the refusals and notes. `field` is
-    None for a sentence that names no setting on the page."""
+    None for a sentence that names no setting on the page. A note with a Dutch
+    twin in `messages.NOTE_NL` is shown in Dutch when `lang` is "nl"."""
     out, seen = [], set()
 
     def add(field, card, tier, text):
@@ -312,10 +314,11 @@ def anchors(problems, notes, model, keys) -> list:
         add(None, None, "bad", text)
     for note in notes:
         tier = note.tier if note.tier in _TIERS else "info"
+        text = messages.NOTE_NL.get(note.text, note.text) if lang == "nl" else note.text
         for key in note.keys or (None,):
             for field, card in (targets(key, note.text, model) if key
                                 else [(None, None)]):
-                add(field, card, tier, note.text)
+                add(field, card, tier, text)
     # A sentence placed on one inverter's field is not also put on the list.
     roster = _roster()
     placed = {m["text"] for m in out