Drop the unused Logo icon variant, poll the Home runs tile at 10s

The icon variant lost its last caller when the responsive variant stopped
carrying a second cropped image. runOverviewQueryOptions now takes the
refetch interval, defaulting to the 30s the Runs screen and the dashboard
panel want; Home passes 10s so a short run does not linger on the tile.
agents.md spells the API host as api.${DOMAIN}, which is what the rest of
the docs use.

docs/code/agents.md

@@ -20,7 +20,7 @@ local stack.
 ## Connecting a client
 
 ```sh
-claude mcp add --transport http fluksio https://api.fluksio.com/mcp
+claude mcp add --transport http fluksio https://api.${DOMAIN}/mcp
 ```
 
 The OAuth flow does the rest: the client registers itself, you approve it in