no-bug: re-schedule live folders fetch after sleep (gh-12883)

src/zen/live-folders/LiveFoldersComponents.manifest

@@ -3,3 +3,4 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 category browser-window-delayed-startup resource:///modules/zen/ZenLiveFoldersManager.sys.mjs ZenLiveFoldersManager.init
+category browser-quit-application-granted resource:///modules/zen/ZenLiveFoldersManager.sys.mjs ZenLiveFoldersManager.uninit

src/zen/live-folders/ZenLiveFoldersManager.sys.mjs

@@ -34,7 +34,9 @@ class nsZenLiveFoldersManager {
   #saveFilename = "zen-live-folders.jsonlz4";
   #file = null;
 
+  #boundHandleEvent = null;
   stateRestored = Promise.withResolvers();
+
   constructor() {
     this.liveFolders = new Map();
     this.registry = new Map();
@@ -63,10 +65,48 @@ class nsZenLiveFoldersManager {
     this.#isInitialized = true;
   }
 
+  uninit() {
+    if (!this.#isInitialized) {
+      return;
+    }
+
+    Services.obs.removeObserver(this, "wake_notification");
+    if (this.#boundHandleEvent) {
+      lazy.ZenWindowSync.removeSyncHandler(this.#boundHandleEvent);
+      this.#boundHandleEvent = null;
+    }
+
+    for (const liveFolder of this.liveFolders.values()) {
+      liveFolder.stop();
+    }
+
+    this.registry.clear();
+    this.liveFolders.clear();
+    this.dismissedItems.clear();
+
+    this.#isInitialized = false;
+  }
+
   // Event Handling
   // --------------
   #initEventListeners() {
-    lazy.ZenWindowSync.addSyncHandler(this.handleEvent.bind(this));
+    Services.obs.addObserver(this, "wake_notification");
+
+    this.#boundHandleEvent = this.handleEvent.bind(this);
+    lazy.ZenWindowSync.addSyncHandler(this.#boundHandleEvent);
+  }
+
+  observe(_subject, topic, _data) {
+    switch (topic) {
+      case "wake_notification": {
+        // Woke from sleep, re-schedule all fetch
+        for (const liveFolder of this.liveFolders.values()) {
+          liveFolder.stop();
+          liveFolder.start();
+        }
+        break;
+      }
+    }
   }
 
   handleEvent(aEvent) {