(notepad): Update tab loading with request ID validation

quickshell/Modules/Notepad/NotepadTextEditor.qml

@@ -31,6 +31,7 @@ Column {
     property string previewMode: "split" // split | full
     property string pluginHighlightedHtml: ""
     property string lastPluginContent: ""
+    property int loadRequestId: 0
 
     signal saveRequested()
     signal openRequested()
@@ -54,10 +55,18 @@ Column {
     function loadCurrentTabContent() {
         if (!currentTab) return
 
+        const requestedTabId = currentTab.id
+        const requestId = ++loadRequestId
         contentLoaded = false
         NotepadStorageService.loadTabContent(
             NotepadStorageService.currentTabIndex,
             (content) => {
+                const activeTab = NotepadStorageService.tabs.length > NotepadStorageService.currentTabIndex
+                    ? NotepadStorageService.tabs[NotepadStorageService.currentTabIndex]
+                    : null
+                if (requestId !== loadRequestId || !activeTab || activeTab.id !== requestedTabId)
+                    return
+
                 lastSavedContent = content
                 textArea.text = content
                 contentLoaded = true

quickshell/Services/NotepadStorageService.qml

@@ -102,6 +102,14 @@ Singleton {
         metadataFile.setText(JSON.stringify(metadata, null, 2))
     }
 
+    function getTabById(tabId) {
+        for (var i = 0; i < tabs.length; i++) {
+            if (tabs[i].id === tabId)
+                return tabs[i]
+        }
+        return null
+    }
+
     function loadTabContent(tabIndex, callback) {
         if (tabIndex < 0 || tabIndex >= tabs.length) {
             callback("")
@@ -109,6 +117,7 @@ Singleton {
         }
 
         var tab = tabs[tabIndex]
+        var requestTabId = tab.id
         var fullPath = tab.isTemporary
                         ? baseDir + "/" + tab.filePath
                         : tab.filePath
@@ -123,6 +132,16 @@ Singleton {
         var fileChecker = fileExistsComponent.createObject(root, {
             path: fullPath,
             callback: (exists) => {
+                var currentTab = root.getTabById(requestTabId)
+                var currentPath = currentTab
+                    ? (currentTab.isTemporary ? baseDir + "/" + currentTab.filePath : currentTab.filePath)
+                    : ""
+
+                if (!currentTab || currentPath !== fullPath) {
+                    callback("")
+                    return
+                }
+
                 if (exists) {
                     var loader = tabFileLoaderComponent.createObject(root, {
                         path: fullPath,