Make update notification InfoBar clickable in Flyout (#42064)

## Summary

Resolves #38854 by making the "Update available" InfoBar in the tray
icon flyout clickable, providing direct navigation to the General
settings page where users can manage updates.

## Problem

When PowerToys has an available update, users experience unnecessary
navigation friction:

1. Click PowerToys tray icon → flyout opens with "Update available"
InfoBar
2. InfoBar is not clickable, only the settings wheel is interactive
3. Click settings wheel → opens Dashboard page (not where updates are
managed)
4. Navigate to General page → finally access update controls

Users requested making the "Update available" text itself a hyperlink
for direct access to update functionality.

## Solution

Made the InfoBar interactive by adding a `Tapped` event handler that:
- Hides the flyout (consistent with other flyout actions)
- Opens Settings window directly to the General page using
`App.OpenSettingsWindow(typeof(GeneralPage))`

## Changes

**Files Modified:**
- `src/settings-ui/Settings.UI/SettingsXAML/Flyout/LaunchPage.xaml`:
Added `Tapped="UpdateInfoBar_Tapped"` event
- `src/settings-ui/Settings.UI/SettingsXAML/Flyout/LaunchPage.xaml.cs`:
Added event handler and navigation logic

## User Experience

**Before:** Tray Icon → Flyout → Settings Wheel → Dashboard → Navigate
to General → Update Controls
**After:** Tray Icon → Flyout → **Click "Update available"** → General
Page → Update Controls

The InfoBar now behaves as a clickable hyperlink as requested, while
preserving all existing functionality. Users can still use the settings
wheel if preferred, but now have a more direct path to update
management.

## Testing

The implementation follows existing patterns in the codebase and uses
established APIs. The InfoBar only appears when updates are in
`ReadyToInstall` or `ReadyToDownload` states, ensuring the navigation is
contextually appropriate.

> [!WARNING]
>
> <details>
> <summary>Firewall rules blocked me from connecting to one or more
addresses (expand for details)</summary>
>
> #### I tried to connect to the following addresses, but was blocked by
firewall rules:
>
> - `i1qvsblobprodcus353.vsblob.vsassets.io`
>   - Triggering command: `dotnet build` (dns block)
>
> If you need me to access, download, or install something from one of
these locations, you can either:
>
> - Configure [Actions setup
steps](https://gh.io/copilot/actions-setup-steps) to set up my
environment, which run before the firewall is enabled
> - Add the appropriate URLs or hosts to the custom allowlist in this
repository's [Copilot coding agent
settings](https://github.com/microsoft/PowerToys/settings/copilot/coding_agent)
(admins only)
>
> </details>

<!-- START COPILOT CODING AGENT SUFFIX -->



<details>

<summary>Original prompt</summary>

> 
> ----
> 
> *This section details on the original issue you should resolve*
> 
> <issue_title>Taskbar icon should provide link directly to update
page</issue_title>
> <issue_description>### Description of the new feature / enhancement
> 
> Right now when there is an update the following message appears when
you click on the PT icon in the taskbar:
> 
>
![Image](https://github.com/user-attachments/assets/18641e1c-d80b-4f7e-b206-8c9a36f2de36)
> 
> When you click on the settings wheel you go to the dashboard page:
> 
>
![Image](https://github.com/user-attachments/assets/e951b988-79ab-48b3-8714-a26999223153)
> 
> Then you need to click on the Learn more button before you finally get
to the page where you can install the update:
> 
>
![Image](https://github.com/user-attachments/assets/914c9c00-a642-40da-bfb5-439c1fd930c0)
> 
> Can't you make the **_Update available_** a hyperlink or add another
button that would link directly to the General page (or wherever the
update button is) so we can quickly install the update instead of going
a roundabout way every time?
> 
>
![Image](https://github.com/user-attachments/assets/5c065eed-84ad-47be-9432-607155065a17)
> 
> ### Scenario when this would be used?
> 
> When there is an update. It's a usability annoyance more than
anything.
> 
> ### Supporting information
> 
> _No response_</issue_description>
> 
> ## Comments on the Issue (you are @copilot in this section)
> 
> <comments>
> </comments>
> 


</details>
Fixes microsoft/PowerToys#38854

<!-- START COPILOT CODING AGENT TIPS -->
---

✨ Let Copilot coding agent [set things up for
you](https://github.com/microsoft/PowerToys/issues/new?title=✨+Set+up+Copilot+instructions&body=Configure%20instructions%20for%20this%20repository%20as%20documented%20in%20%5BBest%20practices%20for%20Copilot%20coding%20agent%20in%20your%20repository%5D%28https://gh.io/copilot-coding-agent-tips%29%2E%0A%0A%3COnboard%20this%20repo%3E&assignees=copilot)
— coding agent works faster and does higher quality work when set up for
your repo.

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: niels9001 <9866362+niels9001@users.noreply.github.com>
Co-authored-by: Niels Laute <niels.laute@live.nl>

src/settings-ui/Settings.UI/SettingsXAML/Flyout/LaunchPage.xaml

@@ -111,7 +111,8 @@
                 x:Uid="UpdateAvailableInfoBar"
                 IsClosable="False"
                 IsOpen="{x:Bind ViewModel.IsUpdateAvailable, Mode=OneWay}"
-                Severity="Success" />
+                Severity="Success"
+                Tapped="UpdateInfoBar_Tapped" />
 
             <StackPanel
                 Grid.Row="1"
@@ -144,7 +145,6 @@
                 <Button
                     x:Name="SettingsBtn"
                     x:Uid="SettingsBtn"
-                    Padding="8"
                     Click="SettingsBtn_Click"
                     Style="{StaticResource FlyoutButtonStyle}">
                     <ToolTipService.ToolTip>

src/settings-ui/Settings.UI/SettingsXAML/Flyout/LaunchPage.xaml.cs

@@ -10,6 +10,7 @@ using Microsoft.PowerToys.Settings.UI.Controls;
 using Microsoft.PowerToys.Settings.UI.Library;
 using Microsoft.PowerToys.Settings.UI.Library.Telemetry.Events;
 using Microsoft.PowerToys.Settings.UI.ViewModels;
+using Microsoft.PowerToys.Settings.UI.Views;
 using Microsoft.PowerToys.Telemetry;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
@@ -183,5 +184,14 @@ namespace Microsoft.PowerToys.Settings.UI.Flyout
             // Closing manually the flyout since no window will steal the focus
             App.GetFlyoutWindow()?.Hide();
         }
+
+        private void UpdateInfoBar_Tapped(object sender, Microsoft.UI.Xaml.Input.TappedRoutedEventArgs e)
+        {
+            // Hide the flyout before opening settings window
+            App.GetFlyoutWindow()?.Hide();
+
+            // Open Settings window directly to General page where update controls are located
+            App.OpenSettingsWindow(typeof(GeneralPage));
+        }
     }
 }