UX-13 P4 review fixes (PR #146, comment 1887)

R1: first_start also needs a Store created at this boot (Store.fresh), so
    old never-started sites (both TEST-23 add-ons, one in shadow) stay on Home.
R2: a kettle skip after a fall says on the last step that the reading went down.
R3: the shadow switch goes only on the model the wizard posts, never into V.
R4: Home Assistant not answering is red on the last step.
R5: meter + solar + battery below -300 W flags a reversed battery sensor.
R6: the live checks say what to change and where.

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

goodwe_controller/tools/ux13_demo.py

@@ -13,7 +13,7 @@ options, a schema read off config.yaml the way the Supervisor renders it
 saves in memory, so the Installer view can be clicked through end to end.
 
 P4: STATE `new` is a new install (config.yaml's defaults with one power
-request entity, an empty Store, control never started), so the page opens
+request entity, an empty Store made at this boot, control never started), so the page opens
 the setup wizard by itself. A one-entity read of sensor.grid steps through
 KETTLE_READS, so the kettle test sees the kettle go on (up) and then a
 reversed meter (down).
@@ -45,6 +45,8 @@ PRICES = [.24, .22, .21, .20, .21, .22, .24, .27, .26, .22, .18, .16, .15,
 
 
 class Store(dict):
+    fresh = False           # app/store.py: no state file at this boot
+
     def set(self, k, v):
         self[k] = v
 
@@ -256,7 +258,9 @@ def controller(state):
 async def main(state, port, host="127.0.0.1"):
     if state == "new":
         stored = dict(defaults(CONFIG), setpoint_entity="number.a")
-        c = Controller(dict(stored), Hass(), Store(), Pub(),
+        store = Store()
+        store.fresh = True          # a new /data: the wizard opens by itself
+        c = Controller(dict(stored), Hass(), store, Pub(),
                        stop=asyncio.Event())
         c.auto = False
         runner = aioweb.AppRunner(web.build_app(c, Supervisor(stored)))