release 1.4.0

[github-actions]

Version bump only: scripts/bump-version.sh 1.4.0.

Merging this tags super-prototyping--v1.4.0 and cuts the GitHub
Release from the ## v1.4.0 section of RELEASE-NOTES.md, so write
that section before merging if it is not in yet.

Users are on the old version until this merges: the version string is the
cache key /plugin update and codex plugin marketplace upgrade compare.

[cloudflare-workers-and-pages]

Deploying super-prototyping with    Cloudflare Pages

Latest commit:	4d043e6
Status:	✅  Deploy successful!
Preview URL:	https://268e44fa.super-prototyping.pages.dev
Branch Preview URL:	https://release-1-4-0.super-prototyping.pages.dev

View logs

[Jing-yilin]

Step 4 is done: 4d043e6 renames ## Unreleased to ## v1.4.0 and leaves a
fresh empty ## Unreleased above it, so merging this is step 5 and nothing
else is owed first.

Why 1.4.0. Minor, by CONTRIBUTING's rubric: this cycle is canvas features
(the chat panel, pictures, Geist, the top bar). Nothing makes an existing
project's folders wrong, so it is not major; it is far more than a fix, so it
is not a patch.

The release body. Run through the tag job's own awk, ## v1.4.0 extracts
160 lines, opening on the date lead and closing on the last bullet, with no
part of ## v1.3.0 in it.

What step 1 had to reconstruct. The whole picture feature area — fourteen
commits across #97, #98 and #99 — had reached main with no line in
## Unreleased; that went in as #101 before this workflow was dispatched.
Grouping the section then caught three more:

• The panel no longer "folds to a rail". canvas: what the review of #97 found, fixed #98 made collapsed display: none
  and put the switch in the canvas's corner, and the old sentence contradicted
  the paragraph four below it.
• sp-canvas stop now signals the process group, so an agent the panel spawned
  goes down with the server rather than being left editing your project.
• Force refresh moved to the right-click menu, which both skills now say.

Gates. Green locally before the dispatch (bun run lint, test, build,
tools/test_refkit.py 25 checks, tools/test_sp_canvas.py 6 checks,
claude plugin validate . --strict), green in the workflow's own gates job,
and green on this PR.

After merging, check the three things CONTRIBUTING asks for: the
super-prototyping--v1.4.0 tag on the Releases page, /plugin update super-prototyping in Claude Code, and the uv tool install --force line
pinned to that tag. The toolkit half matters this time — sp-canvas 1.3.0 and
earlier answer 503 to every chat message.

🤖 Generated with Claude Code