JJ-FZF 0.42.0.nightly2610162328

Development version - may contain bugs or compatibility issues.

Makefile.mk: bake DIST_VERSION into the tarball, name the checksum file SHA256SUMS    # 2026-10-17 Tim Janik 5676904
    dist takes DIST_VERSION from gh-release.sh and writes it into the tarball's
    .version, so the tarball name, that .version, the installed .version and
    `jj-fzf --version` all match. distcheck already compares the --version of
    jj-fzf.sfx built from the tarball.
    
    distcheck writes artifacts/SHA256SUMS instead of $(distname).SHA256SUMS.

.github/workflows/gh-release.sh, release-test.sh: pass DIST_VERSION, check SHA256SUMS    # 2026-10-17 Tim Janik ce116b3
    gh-release.sh runs `make distcheck DIST_VERSION=...`: the tag for annotated
    tags, the tag plus -g<hash> for lightweight tags, since those may move or
    vanish. It checks that artifacts/SHA256SUMS lists $PROJECT-$DIST_VERSION
    assets. A fixed name lets download scripts fetch SHA256SUMS without knowing
    the asset names.
    
    A lightweight tag may differ from .version unless HEAD has an annotated
    version tag. The top NEWS.md entry gives the notes whenever its version
    matches the tag, also for lightweight tags. extract_version() stops at the
    first '## ' heading, so '## Unreleased' on top is no match, and accepts
    major versions with several digits.
    
    release-test.sh covers these and checks that .version ignores a nightly tag.

.version: describe from annotated tags only    # 2026-10-17 Tim Janik b5b0fb3
    With %(describe:tags), a lightweight nightly tag became the base for every
    later commit, so trunk builds and GitHub source downloads were named after
    the nightly tag. Releases from lightweight tags get their version from
    DIST_VERSION instead.

tests/regressions.sh: remove test-version-metadata    # 2026-10-17 Tim Janik a167809
    Regression tests cover jj-fzf behavior. Versioning is checked by
    release-test.sh, and installcheck and distcheck compare `jj-fzf --version`
    with the version make uses.

Merge branch 't3code/screencast-isolation'    # 2026-10-14 Tim Janik 1237e73
    * Branch commit log:
      README.md: describe the current screencast flows
      screencasts/megamerge.sh: rewrite for current jj-fzf keys and dialogs, check results
      screencasts/merging.sh: rewrite for Tab selection and Ctrl-N merges, check results
      screencasts/splitting.sh: port to start_screencast and current jj-fzf keys, check results
      screencasts/rebasing.sh: port to start_screencast and current jj-fzf keys, check results
      screencasts/intro.sh: port to start_screencast and current jj-fzf keys
      screencasts/prepare.sh: make_repo: use jj revert, jj backout was removed
      screencasts/prepare.sh: run screencasts on a private tmux server
      screencasts/prepare.sh: keep user config and environment out of screencasts

Merge branch 'test-squash-and-inject'    # 2026-10-13 Tim Janik 991241d
    * Branch commit log:
      tests/features.sh: add tests for squash and inject hotkeys
      tests/utils.sh: add get_tree_id() to compare commit content across rebases

Merge branch 'jj-0.45 and nightly distcheck'    # 2026-10-13 Tim Janik bbc50c1
    * Branch commit log:
      .github/workflows/distcheck.yml: run make distcheck every night
    	Run only if trunk got a new commit in the last 25 hours, or when
    	started by hand. Install the same packages as ci.yml, upload the
    	artifacts and ping IRC when done.
      preflight.sh: require jj-0.45.0

Merge branch 'fix tests'    # 2026-10-09 Tim Janik 3ae87c9
    * Branch commit log:
      tests/regressions.sh: remove test-oplog-info-all-changes, it only tested oplog
      tests/utils.sh: isolate_config(): keep user config and environment out of tests