Introduce watchdog and serialization improvements

- Added watchdog timer for improved system stability and responsiveness.
- Switched save data serialization to Bincode for better efficiency.
- Enhanced compatibility by supporting fallback to older JSON format.
- Improved logging during flash operations for easier debugging.
- Simplified SavegameManager by managing storage directly.

Software/MainBoard/rust/src_webpack/src/main.ts

@@ -240,7 +240,10 @@ export class Controller {
             .then(_ => {
                 controller.progressview.removeProgress("set_config");
                 setTimeout(() => {
-                    controller.downloadConfig()
+                    controller.downloadConfig().then(r => {
+                        controller.updateSaveList().then(r => {
+                        });
+                    });
                 }, 250)
             })
     }