feat: discover validated icons from local LXC applications

AppImage/messages/en/common.json

@@ -1790,6 +1790,11 @@
       "catalogPort": "port {port}",
       "trackingAvailable": "tracking available",
       "logoUrlLabel": "Logo URL",
+      "discoverLocalLogo": "Find icon from local application",
+      "localLogoPort": "Application port for icon lookup",
+      "localLogoHelp": "Reads only the selected port in this running container. External icons are not fetched. The icon is applied when you save.",
+      "localLogoStopped": "The container is stopped. Start it before looking for its icon.",
+      "localLogoUnavailable": "No usable local icon was found. Check the selected web port and try again. Your current icon is unchanged.",
       "webLinks": "Web links",
       "addPort": "Add port",
       "detectedPorts": "Ports detected in the container — click to add:",

AppImage/messages/sk/common.json

@@ -1729,6 +1729,11 @@
       "catalogPort": "port {port}",
       "trackingAvailable": "možno sledovať verziu",
       "logoUrlLabel": "URL loga",
+      "discoverLocalLogo": "Zistiť ikonu z lokálnej aplikácie",
+      "localLogoPort": "Port aplikácie na hľadanie ikony",
+      "localLogoHelp": "Číta iba vybraný port v tomto spustenom kontajneri. Externé ikony nesťahuje. Ikona sa použije až po uložení.",
+      "localLogoStopped": "Kontajner je vypnutý. Pred hľadaním ikony ho spusti.",
+      "localLogoUnavailable": "Použiteľná lokálna ikona sa nenašla. Skontroluj vybraný webový port a skús to znova. Pôvodná ikona zostala nezmenená.",
       "webLinks": "Webové odkazy",
       "addPort": "Pridať port",
       "detectedPorts": "Porty nájdené v kontajneri — kliknutím ich pridáte:",