🐛 Missing message when no repository is selected in settings

[Friedinger]

🐛 Bug Description

When no repository is selected in the settings, the task list shows:
No Issues matching current filters found in this repository

This is misleading, because the user has not selected any repository yet.
Instead, there should be a clear message that no repository is selected.

🔁 Steps to Reproduce

1. Go to Settings.
2. Ensure that no repository is selected.
3. Open the Task List view.
4. Notice the message: "No Issues matching current filters found in this repository".

🤔 Expected Behavior

If no repository is selected, the application should display a clear message like:
"No repository selected. Please choose one in the settings."
instead of showing a misleading "no issues found" message.

Operating system

No response

Affected version

v1.0.0-alpha

Last working version (Optional)

No response

📎 Additional Context (Optional)

• This would improve the user experience and reduce confusion.
• A screenshot of the current message could be added for clarity.

No duplicate issue

• I confirm that this issue is not a duplicate

Code of Conduct

• I agree to follow this project's Code of Conduct

[Friedinger]

@Ruby11235 could you take response of this issue?