UX-15 review: shorter setup banner (PR #147)

The Home banner title was ten words; UX-08 asks for about six.

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

goodwe_controller/DOCS.md

@@ -3244,9 +3244,8 @@ control is started, and whenever the stored settings name no inverter to
 control. A site that already ran before is never sent there.
 
 A new install names no inverter yet, so the add-on starts **in setup**: it
-serves the page and sends nothing to any inverter. Home says "Setup: the
-add-on controls nothing until setup is done", and there is no Start button. The
-installer's steps:
+serves the page and sends nothing to any inverter. Home says "Setup: nothing
+is controlled yet", and there is no Start button. The installer's steps:
 
 1. Install the add-on, turn on **Watchdog** on its Info tab, and start it.
    Leave the Configuration tab as it is.
@@ -3276,9 +3275,9 @@ inverter stays at 0 W. If the banner is red and says a safety stop stays on,
 one of the red rows below is a stop that will still be there when shadow mode
 ends. That row says how to clear it.
 
-In **setup** (a new install that names no inverter yet) the banner says the
-add-on controls nothing until setup is done, and the one row says to finish
-Setup. See *Setup, for a new install*.
+In **setup** (a new install that names no inverter yet) the banner says
+nothing is controlled yet, and the one row says to finish Setup. See *Setup,
+for a new install*.
 
 | Row starts with | What it tells you |
 |---|---|

goodwe_controller/app/messages.py

@@ -385,7 +385,7 @@ def banner_stopped() -> str:
 def banner_setup_only() -> str:
     """UX-15: setup-only mode, where the add-on serves the page and commands
     nothing (app/setuponly.py)."""
-    return "Setup: the add-on controls nothing until setup is done"
+    return "Setup: nothing is controlled yet"
 
 
 def row_setup_only() -> str: