Remove the “Browse all courses” button from the tutorial completion dialog

[qingqing-ux]

Background

• After completing a tutorial, both the “Browse all courses” button in the completion dialog and the course icon in the editor navigation trigger a “Project will not be saved” warning.
• Related issue: Improve post-tutorial guidance for continuous learning #3292

Problem

• The “Browse all courses” button in the completion dialog does not reduce the number of steps needed to leave the editor.
• Because tutorials do not have the same save concept as personal projects, this button introduces extra cognitive load around an irrelevant save warning.

What Needs Improvement

• Keep the course icon in the editor navigation as the trigger for leaving the editor and showing the warning.
• Remove the “Browse all courses” button from the tutorial completion dialog.

Expected Outcome

• Users are still warned before leaving the editor.
• The completion dialog focuses on the most relevant next action and avoids unnecessary decision points.

Acceptance Criteria

• The tutorial completion dialog no longer shows the “Browse all courses” button.
• Clicking the course icon in the editor navigation still shows the “Project will not be saved” warning.
• Users can still return to the course list through the editor navigation.