simplify makefile

[feederbox826]

struggled tremendously to get this working properly with homebrew

notable changes

• added "dependency files" instead of trying to chain together ui/generate
  • this drops touch-ui as a hard dependency and will build properly instead
• replace npm run with pnpm run
• drop build-release from install, use static name

fixes #6877

[WithoutPants]

#6877 doesn't actually fix #5674, and is not fixed in this branch either.

Running make -j 4 release on develop I get the following output:

cd ui/v2.5 && pnpm install --frozen-lockfile
make: Circular ui-only <- ui dependency dropped.
go generate ./ui
go build  -v -tags "sqlite_stat4 sqlite_math_functions" -trimpath -buildmode=pie -ldflags "-s -w -X 'github.com/stashapp/stash/internal/build.buildstamp=2026-05-08 09:35:01' -X 'github.com/stashapp/stash/internal/build.githash=01a758336' -X 'github.com/stashapp/stash/internal/build.version=v0.31.1-46-g01a758336' -X 'github.com/stashapp/stash/internal/build.officialBuild=false'" ./cmd/stash
Generating login locales
go generate ./cmd/stash
github.com/stashapp/stash/ui
github.com/stashapp/stash/internal/manager
Lockfile is up to date, resolution step is skipped
Already up to date
github.com/stashapp/stash/internal/api
# github.com/stashapp/stash/internal/api
open internal/api/generated_exec.go: no such file or directory
make: *** [Makefile:123: stash] Error 1
make: *** Waiting for unfinished jobs....
Done in 1s using pnpm v10.33.0

On this branch, running make -j 4 release works, but it's running the go build and the UI build concurrently, so changes to the UI may not make it into the binary output. I could address this by adding ui/v2.5/build/index.html to the stash target, but then the build target would always do the UI build, even if the UI source files hadn't been updated.