feat(feedback): Sends MessageEvent when error page embed is closed

[arya-s]

Sends reportdialog_closed via window.postMessage to the parent of the error page embed in preparation of supporting an onClose callback in @sentry/browser showReportDialog.

Fixes getsentry/sentry-javascript#9433

Please see the accompanying PRs:

• for the sdk: feat(feedback): Add onClose callback to showReportDialog (#9433) sentry-javascript#9550
• for the docs: feat(feedback): Add onClose description to user-feedback sentry-docs#8484

Legal Boilerplate

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. and is gonna need some rights from me in order to utilize my contributions in this here PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

[github-actions]

🚨 Warning: This pull request contains Frontend and Backend changes!

It's discouraged to make changes to Sentry's Frontend and Backend in a single pull request. The Frontend and Backend are not atomically deployed. If the changes are interdependent of each other, they must be separated into two pull requests and be made forward or backwards compatible, such that the Backend or Frontend can be safely deployed independently.

Have questions? Please ask in the #discuss-dev-infra channel.

[codecov]

Codecov Report

Merging #59885 (5fffdc0) into master (596e46b) will increase coverage by 0.00%.
Report is 2 commits behind head on master.
The diff coverage is 75.00%.

❗ Current head 5fffdc0 differs from pull request most recent head 201ceab. Consider uploading reports for the commit 201ceab to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #59885   +/-   ##
=======================================
  Coverage   80.86%   80.87%           
=======================================
  Files        5183     5183           
  Lines      227620   227618    -2     
  Branches    38300    38299    -1     
=======================================
+ Hits       184072   184085   +13     
+ Misses      37928    37918   -10     
+ Partials     5620     5615    -5     

Files	Coverage Δ
src/sentry/testutils/pytest/selenium.py	74.65% <75.00%> (+1.73%)	⬆️

... and 8 files with indirect coverage changes

[AbhiPrasad]

Suggested change

	window.parent.postMessage('reportdialog_closed', '*');
	window.parent.postMessage('sentry_reportdialog_closed', '*');

Let's namespace to sentry to reduce possible collisions/confusions as much as possible

[arya-s]

How about even more of an indication that it comes from a library: __sentry_reportdialog_closed__?

[AbhiPrasad]

Even better!

[markstory]

Selenium tests and embed logic changes look good to me.

[AbhiPrasad]

Thanks a lot for the PR - lets get this deployed and then merge in changes for SDK + docs :)

[AbhiPrasad]

/gcbrun

[arya-s]

Thanks a lot for the PR - lets get this deployed and then merge in changes for SDK + docs :)

My pleasure, please let me know if there's anything else needed.

[AbhiPrasad]

/gcbrun