Add ShowNotification API: inline notification bar in main window

Flow.Launcher.Core/Plugin/JsonRPCV2Models/JsonRPCPublicAPI.cs

@@ -89,6 +89,11 @@ public void ShowMsg(string title, string subTitle, string iconPath, bool useMain
             _api.ShowMsg(title, subTitle, iconPath, useMainWindowAsOwner);
         }
 
+        public void ShowNotification(string title, string subTitle = "", NotificationSeverity severity = NotificationSeverity.Informational)
+        {
+            _api.ShowNotification(title, subTitle, severity);
+        }
+
         public void OpenSettingDialog()
         {
             _api.OpenSettingDialog();

Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs

@@ -93,6 +93,17 @@ public interface IPublicAPI
         /// <param name="subTitle">Optional message subtitle</param>
         void ShowMsgErrorWithButton(string title, string buttonText, Action buttonAction, string subTitle = "");
 
+        /// <summary>
+        /// Show an inline notification bar in the Flow Launcher main window.
+        /// Unlike <see cref="ShowMsg"/>, this displays directly inside the application window and
+        /// cannot be blocked by OS notification settings.
+        /// The notification bar remains visible until the user closes it.
+        /// </summary>
+        /// <param name="title">Notification title</param>
+        /// <param name="subTitle">Optional notification subtitle</param>
+        /// <param name="severity">Severity level that controls the icon and accent color</param>
+        void ShowNotification(string title, string subTitle = "", NotificationSeverity severity = NotificationSeverity.Informational);
+
         /// <summary>
         /// Show the MainWindow when hiding
         /// </summary>

Flow.Launcher.Plugin/NotificationSeverity.cs

@@ -0,0 +1,20 @@
+namespace Flow.Launcher.Plugin
+{
+    /// <summary>
+    /// Specifies the severity level of an inline notification shown in the Flow Launcher window.
+    /// </summary>
+    public enum NotificationSeverity
+    {
+        /// <summary>Informational notification (blue icon).</summary>
+        Informational = 0,
+
+        /// <summary>Success notification (green icon).</summary>
+        Success = 1,
+
+        /// <summary>Warning notification (yellow icon).</summary>
+        Warning = 2,
+
+        /// <summary>Error notification (red icon).</summary>
+        Error = 3
+    }
+}

Flow.Launcher/MainWindow.xaml

@@ -352,6 +352,16 @@
                     Y2="0" />
             </Grid>
 
+            <ui:InfoBar
+                Title="{Binding InlineNotificationTitle}"
+                Margin="4 0 4 0"
+                IsClosable="True"
+                IsIconVisible="True"
+                IsOpen="{Binding InlineNotificationIsOpen, Mode=TwoWay}"
+                Message="{Binding InlineNotificationMessage}"
+                Severity="{Binding InlineNotificationSeverity}"
+                WindowChrome.IsHitTestVisibleInChrome="True" />
+
             <Grid x:Name="MiddleSeparatorArea" ClipToBounds="True">
                 <ContentControl>
                     <ContentControl.Style>

Flow.Launcher/Notification.cs

@@ -2,7 +2,11 @@
 using System.Collections.Concurrent;
 using System.IO;
 using System.Windows;
+using CommunityToolkit.Mvvm.DependencyInjection;
 using Flow.Launcher.Infrastructure;
+using Flow.Launcher.Plugin;
+using Flow.Launcher.ViewModel;
+using iNKORE.UI.WPF.Modern.Controls;
 using Microsoft.Toolkit.Uwp.Notifications;
 
 namespace Flow.Launcher
@@ -141,5 +145,19 @@ private static void LegacyShowWithButton(string title, string buttonText, Action
             var msg = new MsgWithButton();
             msg.Show(title, buttonText, buttonAction, subTitle, iconPath);
         }
+
+        public static void ShowInline(string title, string subTitle, NotificationSeverity severity)
+        {
+            var infoBarSeverity = severity switch
+            {
+                NotificationSeverity.Success => InfoBarSeverity.Success,
+                NotificationSeverity.Warning => InfoBarSeverity.Warning,
+                NotificationSeverity.Error => InfoBarSeverity.Error,
+                _ => InfoBarSeverity.Informational
+            };
+
+            var mainVM = Ioc.Default.GetRequiredService<MainViewModel>();
+            mainVM.ShowInlineNotification(title, subTitle, infoBarSeverity);
+        }
     }
 }

Flow.Launcher/PublicAPIInstance.cs

@@ -132,6 +132,11 @@ public void ShowMsg(string title, string subTitle, string iconPath, bool useMain
             Notification.Show(title, subTitle, iconPath);
         }
 
+        public void ShowNotification(string title, string subTitle = "", NotificationSeverity severity = NotificationSeverity.Informational)
+        {
+            Notification.ShowInline(title, subTitle, severity);
+        }
+
         public void ShowMsgWithButton(string title, string buttonText, Action buttonAction, string subTitle = "", string iconPath = "") =>
             ShowMsgWithButton(title, buttonText, buttonAction, subTitle, iconPath, true);
 

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -26,6 +26,7 @@
 using Flow.Launcher.Plugin.SharedCommands;
 using Flow.Launcher.Storage;
 using iNKORE.UI.WPF.Modern;
+using iNKORE.UI.WPF.Modern.Controls;
 using Microsoft.VisualStudio.Threading;
 
 namespace Flow.Launcher.ViewModel
@@ -935,6 +936,25 @@ public UserControl CustomizedPreviewControl
         public double ClockPanelOpacity { get; set; } = 1;
         public double SearchIconOpacity { get; set; } = 1;
 
+        public bool InlineNotificationIsOpen { get; set; }
+        public string InlineNotificationTitle { get; set; } = string.Empty;
+        public string InlineNotificationMessage { get; set; } = string.Empty;
+        public InfoBarSeverity InlineNotificationSeverity { get; set; } = InfoBarSeverity.Informational;
+
+        internal void ShowInlineNotification(string title, string message, InfoBarSeverity severity)
+        {
+            if (!Application.Current.Dispatcher.CheckAccess())
+            {
+                Application.Current.Dispatcher.Invoke(() => ShowInlineNotification(title, message, severity));
+                return;
+            }
+
+            InlineNotificationTitle = title;
+            InlineNotificationMessage = message;
+            InlineNotificationSeverity = severity;
+            InlineNotificationIsOpen = true;
+        }
+
         private string _placeholderText;
         public string PlaceholderText
         {