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.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CL9zvnnvcp1mvA8o7impxk

frontend/src/components/Common/Logo.tsx

@@ -6,7 +6,7 @@ import logoDark from "/assets/images/fluksio-dark.svg"
 import logo from "/assets/images/fluksio-light.svg"
 
 interface LogoProps {
-  variant?: "full" | "icon" | "responsive"
+  variant?: "full" | "responsive"
   className?: string
   asLink?: boolean
 }
@@ -29,9 +29,7 @@ export function Logo({
       className={cn(
         variant === "full"
           ? "h-6 w-auto"
-          : variant === "responsive"
-            ? "h-6 w-auto group-data-[collapsible=icon]:hidden"
-            : "size-5 object-contain",
+          : "h-6 w-auto group-data-[collapsible=icon]:hidden",
         className,
       )}
     />