feat: allow commemting on unchanged lines

[divanshu-go]

Adds support for commenting on unchanged lines (Expanded lines)

/claim #32257
Closes #32257

[divanshu-go]

[lunny]

You still need to consider those lines that async loading.

[divanshu-go]

@lunny can you please help because I'm having hard time understanding the codebase.
#32354 (comment) (I didn't get your point)

[lunny]

@lunny can you please help because I'm having hard time understanding the codebase. #32354 (comment) (I didn't get your point)

Some code lines are hidden before you click the icon like below

So for these lines, maybe we want to add comments on these lines.
And after some comments are added to these lines, once the page reloads, we need to know there are comments on these lines.

This is the hardest part of this issue.

[divanshu-go]

@lunny after the user adds the comments , the comments get stored in database , but when the page reloads the template is regenerated and we are not able to see those comments but when we again do add comments on those lines , we always see those coments which ware previosly added by the user

[lunny]

@lunny after the user adds the comments , the comments get stored in database , but when the page reloads the template is regenerated and we are not able to see those comments but when we again do add comments on those lines , we always see those coments which ware previosly added by the user

That's the problem. If one adds comments on hidden lines, others don't know there are comments there except he click the expand icons. I think we have two options. One is to expand those lines which have comments but this is very complicated. Another is to add some icons or indications that there are comments on these hidden code lines.

[divanshu-go]

we can show this icon ,

however my concern is about retrieving those comments did on expanded lines or hidden lines.
because currently I'm not able to think of a way to do this
can you please suggest any approach or point out any file or code

[lunny]

If you search FetchCodeCommentsByLine in the whole project, you can find some clues.