[WIP] Fix apps missing from permission setting

[Copilot]

• Understand the issue: App missing from notification permission settings
• Identify root cause: Notification channel not created at app startup
• Fix: Add notification channel initialization in MainApp.onCreate()
• Test: Verify app appears in notification settings
• Code review and security check

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Apps missing from permission setting</issue_title>
<issue_description>Describe the bug
The apps ask for permission to manage notification but the app is not in the list in the permission setting page

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Web on PC'
2. Click on 'Manage notification'
3. See error

Expected behavior
The app's name appear for you to click allow

Screenshots

Desktop (please complete the following information):

• OS: idk
• Browser: idk
• Version: idk

Smartphone (please complete the following information):

• Device: OPPO A38 (CPH2579)
• OS: Android 15
• App Version: 2.1.22

Additional context
Idk how the hell this happen
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Apps missing from permission setting #262

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.