UX-46: Dutch status rows, banners, notes and wizard lines on the NL pages

Rows and banners are built once with their Dutch beside them (messages.Bi)
and status_payload() picks one by the page's language. Settings notes and the
wizard's checks carry a Dutch twin (Note.nl) that /config/validate picks by
the posted language. The peak forecast label drops "(W)" in EN and NL.

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

goodwe_controller/app/main.py

@@ -7464,7 +7464,8 @@ class Controller:
             level, banner = "warn", messages.banner_stopped()
         elif runs:
             level, running_alarm = "bad", True
-            banner = runs[0].get("banner") or messages.headline(runs[0]["text"])
+            banner = runs[0].get("banner") or messages.headline_bi(
+                runs[0]["text"])
         elif any(i.delivery_wd.tripped for i in self.inverters):
             # ⚠️ SAFETY-42, AND IT IS A `warn` BANNER RATHER THAN A `bad` ONE,
             # WHICH IS THE WHOLE "reports, does not act" DECISION IN ONE LINE.
@@ -7487,11 +7488,11 @@ class Controller:
             # character; at two, "Maintenance: drain" without a name is a
             # banner an operator cannot act on, because the remedy is at one
             # device and the site has two.
-            level, banner = "warn", f"Maintenance: {self.maint.phase}"
-            if len(self.inverters) > 1:
-                banner += f" ({self.maint_unit.name})"
+            level, banner = "warn", messages.banner_maintenance(
+                self.maint.phase,
+                self.maint_unit.name if len(self.inverters) > 1 else "")
         else:
-            level, banner = "ok", "Running — holding grid at zero"
+            level, banner = "ok", messages.banner_running()
 
         def w(v):
             return "—" if v is None else f"{v:,.0f} W".replace(",", " ")
@@ -7595,6 +7596,13 @@ class Controller:
                 now=datetime.now(timezone.utc), why=self.why_words)),
         ]
         held = level == "bad" and not running_alarm
+        # UX-46. The rows were built in English with their Dutch beside them
+        # (`messages.Bi`); the page's language is chosen once, here, for the
+        # Home sentences, the checks list and the rows that carry one. The
+        # banner above stays English: it is the plain fallback.
+        checks = [dict(c, text=messages.pick(c["text"], lang)) for c in checks]
+        rows = [(k, messages.pick(v, lang)) for k, v in rows]
+        banner = messages.pick(banner, lang)
         out = {
             "banner": banner, "level": level, "rows": rows, "checks": checks,
             "hint": self.hint,