OPT-34 review: read the inverter in part 4 with a default

test_named_absence.py flagged next() without a default (CI run 1473).

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

goodwe_controller/test_opt34.py

@@ -616,11 +616,13 @@ check("B leaves the plan too: the latch is empty, so it is gone and "
       and lc.plan_targets() is None)
 latch_step(FC, charging, {A: 80.0})
 lc.solar_fc = None
-ia = next(i for i in lc.inverters if i.name == A)
-ia.soc = 50.0
-st_below = homeview.plan_state(lc)
-ia.soc = 80.0
-st_at = homeview.plan_state(lc)
+ia = next((i for i in lc.inverters if i.name == A), None)
+st_below = st_at = None
+if ia is not None:
+    ia.soc = 50.0
+    st_below = homeview.plan_state(lc)
+    ia.soc = 80.0
+    st_at = homeview.plan_state(lc)
 check("the screen says the charge goes on only while the latched battery is "
       f"below its level ({st_below!r} at 50 %, {st_at!r} at 80 %)",
       st_below == "latched" and st_at == "no_forecast")