Revert "Refactor OTA update handling and improve error reporting."

This reverts commit 7c128a27eb.

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

@@ -3,7 +3,7 @@ class ToastService {
   private stylesInjected = false;
 
   constructor() {
-        this.container = document.getElementById('toast-container') as HTMLElement;
+    this.container = this.ensureContainer();
     this.injectStyles();
   }
 
@@ -41,6 +41,16 @@ class ToastService {
     return div;
   }
 
+  private ensureContainer(): HTMLElement {
+    let container = document.getElementById('toast-container');
+    if (!container) {
+      container = document.createElement('div');
+      container.id = 'toast-container';
+      document.body.appendChild(container);
+    }
+    return container;
+  }
+
   private injectStyles() {
     if (this.stylesInjected) return;
     const style = document.createElement('style');