Enhance map functionality and API documentation

- Updated API documentation for the `rebuildZooms` endpoint to clarify its long execution time and response behavior.
- Modified MapView component to manage tile cache invalidation after rebuilding zoom levels, ensuring fresh tile display.
- Introduced a new composable for handling tile cache invalidation state after admin actions.
- Enhanced character icon creation to reflect ownership status with distinct colors.
- Improved loading state handling in various components for better user experience during data fetching.

internal/app/handlers/admin.go

@@ -334,7 +334,10 @@ func (h *Handlers) APIAdminRebuildZooms(rw http.ResponseWriter, req *http.Reques
 	if h.requireAdmin(rw, req) == nil {
 		return
 	}
-	h.Admin.RebuildZooms(req.Context())
+	if err := h.Admin.RebuildZooms(req.Context()); err != nil {
+		HandleServiceError(rw, err)
+		return
+	}
 	rw.WriteHeader(http.StatusOK)
 }