Update studio branding and fix Sun/Moon refresh startup

[mot-yelraf]

Update the integrated app branding: show Living Weather with the Caelus icon and Peace Hill Studios credit, use the attributed Biodynamic Calendar artwork, remove both footer credits, and place the supplied Peace Hill Studios SVG at the bottom of the settings menu.

Fix a dashboard startup failure where a pending image request prevents the window load event and leaves warming Sun/Moon cards stuck. Start status refresh on DOM readiness so valid astronomy data can display while images are still loading. Add a browser regression that holds the Moon texture request open and verifies recovery. Version: v0.26.251.5.

Validation:

• User verified the branding; desktop and phone-width layouts were checked in Chromium.
• 60 focused Python tests passed, covering integrated weather/calendar, settings layout, and compilation.
• Two astronomy warming/cache tests passed during diagnosis.
• Local PR browser gate: 9 Chromium tests passed, including the delayed-image regression.
• Source and served Peace Hill Studios SVG copies match; git diff --check passed.

Browser tests use the isolated macOS fixture with no live broker or direct sensor hardware. The delayed-image failure was reproduced and fixed in Chromium; the exact cause of the original pywebview session cannot be confirmed after its refresh.