fix: Fixed restoring the previous pinned state clearing up the custom icon, b=no-bug, c=tabs

src/zen/sessionstore/ZenSessionManager.sys.mjs

@@ -224,6 +224,7 @@ export class nsZenSessionManager {
     // If there's no initial state, nothing to restore. This would
     // happen if the file is empty or corrupted.
     if (!initialState) {
+      this.log('No initial state to restore!');
       return;
     }
     // If there are no windows, we create an empty one. By default,
@@ -249,7 +250,7 @@ export class nsZenSessionManager {
     // guarantee that all tabs, groups, folders and split view data
     // are properly synced across all windows.
     this.log(`Restoring Zen session data into ${initialState.windows?.length || 0} windows`);
-    for (const winData of initialState.windows || []) {
+    for (const winData of initialState.windows) {
       this.#restoreWindowData(winData);
     }
   }

src/zen/sessionstore/ZenWindowSync.sys.mjs

@@ -176,8 +176,8 @@ class nsZenWindowSync {
     // This should only happen really when updating from an older version
     // that didn't have this feature.
     this.#runOnAllWindows(null, (aWindow) => {
-      const { gBrowser } = aWindow;
-      for (let tab of gBrowser.tabs) {
+      const { gZenWorkspaces } = aWindow;
+      for (let tab of gZenWorkspaces.allStoredTabs) {
         if (!tab.id) {
           tab.id = this.#newTabSyncId;
           lazy.TabStateFlusher.flush(tab.linkedBrowser);

src/zen/tabs/ZenPinnedTabManager.mjs

@@ -326,7 +326,7 @@ class nsZenPinnedTabManager extends nsZenDOMOperatedFeature {
     // Remove everything except the entry we want to keep
     state.entries = [initialState.entry];
 
-    state.image = initialState.image;
+    state.image = tab.zenStaticIcon || initialState.image;
     state.index = 0;
 
     SessionStore.setTabState(tab, state);