chore: upgrade next (and other dependencies)

[tefkah]

Issue(s) Resolved

Mostly wanted to do this bc i messed up #1284 and i wanted to get the other updates out of the way before retrying it.

High-level Explanation of PR

Not that many changes, next 15.5/4 does technically allow us to build with turbopack, but sadly it's not really faster.

Secondly, next 15.5 enables node middleware. This could allow us to remove all of the community/user checks inside of c/[communitySlug] and move that to the middleware instead and store the user/community in cookies.

That may not be a good idea tho, i say we leave it for now

should we enable turbo for builds

for now, i'll leave it off, as it increases(!) CI build times

locally

Turbo:

Executed in   41.69 secs    fish           external
   usr time  122.94 secs  185.00 micros  122.94 secs
   sys time   27.17 secs  785.00 micros   27.17 secs

standard

Executed in   63.36 secs    fish           external
   usr time   90.41 secs    0.23 millis   90.41 secs
   sys time   14.20 secs    2.10 millis   14.20 secs

ci

standard: 4m 20s

turbo: 4m 40s!! also the bundle size seems to be bigger.

Test Plan

Screenshots (if applicable)

Notes

[github-actions]

PR Preview Action v1.6.2
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2025-08-26 14:52 UTC

[tefkah]

for some reason this was necessary