fix: resolve image urls

when image paths are not absolute resolve them from gui cache if possible

ovos_bus_client/apis/gui.py

@@ -549,13 +549,15 @@ def _resolve_url(self, url: str) -> str:
         """
         if not url or not isinstance(url, str):
             raise ValueError("URL must be a non-empty string")
-
+        if url.startswith("http"):
+            return url
+
         # Sanitize the url to prevent path traversal
         url = os.path.normpath(url)
         if url.startswith("..") or url.startswith("/"):
             return url
 
-        if not url.startswith("http") and not os.path.isfile(url):
+        if not os.path.isfile(url):
             GUI_CACHE_PATH = get_xdg_cache_save_path('ovos_gui')
             # Use os.path.join for path construction
             gui_cache = os.path.join(GUI_CACHE_PATH, self.skill_id, url)
@@ -569,6 +571,7 @@ def _resolve_url(self, url: str) -> str:
                         LOG.debug(f"Resolved image: {gui_cache}")
                         return gui_cache
         return url
+
     def show_image(self, url: str, caption: Optional[str] = None,
                    title: Optional[str] = None,
                    fill: str = None, background_color: str = None,