fix(viz): track draw state to apply recenter on fresh draws

[plyr4]

more stability for the elm vs. js render race condition, where the page root doesnt render quick enough for the graph render dispatch

also

• renames isRefreshDraw to sameBuild to make it a bit clearer
• renames centerOnDraw to freshDraw to make it a bit clearer

[wass3r]

seems to work now. i'm not able to reproduce the issue.
was working on another issue and have to backtrack here. i can reliably reproduce with following steps (on main branch also):

1. visit repo builds page
2. click on any build to go to its build page
3. click "Visualize" tab

it works fine when i hard refresh repo builds page after step 1. and do the remaining steps

found issue

[wass3r]

fwiw, i'm able to get pretty consistent results it seems by changing two things:

1. use renderBuildGraph updatedModel True here

   ui/src/elm/Main.elm

   Line 2169 in 3c4fe3c

   , cmd

2. change the following to use renderBuildGraph um True

   ui/src/elm/Main.elm

   Line 4370 in 3c4fe3c

   renderBuildGraph um False

in other words, passing a truthy centerOnDraw more.

worst result i saw is an initial flash of uncentered graph and then it fixed itself. seemed to be pretty rare - more rare than the initial issues, i think?!

on other minor optimization with this would be to keep track of whether it has already centered and zoomed because it might call it multiple times depending on mix of isrefreshdraw and centerondraw.

didn't notice any ill side effects otherwise, but it's possible there's some use case i'm not accounting for. was just trying a few things :)

[plyr4]

@wass3r thank you for taking a look 🙏 i appreciate it

use renderBuildGraph updatedModel True here
im glad we're seeing the same thing. that change should be present in this PR and it fixed most of the issues i was seeing.

i'll make the other changes, good call