Cleanup notifications

[Gold872]

Reduces some logic duplication and makes it easier to send notifications

Also adds a notification for when the layout is successfully exported

[codecov]

Codecov Report

Attention: Patch coverage is 47.36842% with 10 lines in your changes missing coverage. Please review.

Project coverage is 68.22%. Comparing base (4d0f72a) to head (613f215).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
lib/pages/dashboard_page.dart	47.36%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #159      +/-   ##
==========================================
+ Coverage   68.18%   68.22%   +0.03%     
==========================================
  Files          79       79              
  Lines        8245     8252       +7     
==========================================
+ Hits         5622     5630       +8     
+ Misses       2623     2622       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.