fix: persist thinking effort cycled via Ctrl-T/Shift-Tab - #67

## Related Issue

No issue — the problem is explained below.

## Problem

Two more paths lose the user's saved thinking effort across restarts
(follow-up to #67):

1. The model picker drafts any non-current model at its first non-off
effort level (`low` for models without effort metadata). Confirming the
picker persists that draft as the startup default, silently overwriting
the effort the user had saved. A real config was found holding `effort =
"low"` this way.
2. Saving an effort writes only `thinking.effort`; the config deep merge
preserves a stale `thinking.mode = "off"`, which forces thinking off on
the next startup even when an effort is saved.

## What changed

- The picker's effort draft for a non-current model now keeps the live
effort, coerced to what that model supports, instead of resetting to its
first level.
- Persisting an effort also writes the matching `thinking.mode`
(`on`/`off`), so a stale `mode = "off"` cannot poison restarts.
- Updated picker tests to the new contract and added a regression test
for the switch-keeps-effort behavior.

## Checklist

- [x] I have read the
[CONTRIBUTING](https://github.com/PyModel/pythinker-code/blob/main/CONTRIBUTING.md)
document.
- [x] I have linked a related issue, or explained the problem above.
- [x] I have added tests that prove my feature works.
- [x] Ran `gen-changesets` skill, or this PR needs no changeset.
- [x] Ran `gen-docs` skill, or this PR needs no doc update.

## Related Issue

No issue — follow-up to #66 (GitHub org migration). This PR moves the
npm side to the new org.

## Problem

The GitHub org moved to `PyModel` (#66), but every workspace package
still carries the `@pythoughts` npm scope, and releases still publish to
`@pythoughts/pythinker-code`. Newer versions must publish under the
`pymodel` npm org.

## What changed

- Renamed all 18 workspace packages from `@pythoughts/*` to
`@pymodel/*`: package names, workspace dependencies, imports, and every
tooling reference (changesets config, `flake.nix` workspace names, CI
workflows, release/native/brew/CDN scripts, docs, README badges).
- Fixed escaped-scope references a plain replace misses: the
api-extractor specifier-rewrite regex in the SDK dts build,
vitest/tsdown `alwaysBundle` regexes, and the Windows path marker in the
postinstall reach script.
- Regenerated `pnpm-lock.yaml`; the `flake.nix` `pnpmDeps` hash is
unchanged (verified by rebuilding — workspace names do not affect the
fetched dependency set).
- Added a `minor` changeset so the next release publishes
`@pymodel/pythinker-code`.

Out of scope: the VS Code Marketplace publisher
(`pythoughts.pythinker-code`), `api.pythoughts.com` platform URLs, and
the `ai.pythoughts.pythinker-server` LaunchAgent label — these are
separate identities, not npm scope.

## Merge order

Merge #67, #68, #69 first — their changesets name
`@pythoughts/pythinker-code` and would break `changeset version` if this
PR lands before them.

## Before the first publish (npm side, manual)

1. On npmjs.com, add a Trusted Publishing (OIDC) connection for
`@pymodel/pythinker-code`: repository `PyModel/pythinker-code`, workflow
`release.yml`.
2. After the first successful `@pymodel` release: `npm deprecate
@pythoughts/pythinker-code "Moved to @pymodel/pythinker-code"`.

## Checklist

- [x] I have read the
[CONTRIBUTING](https://github.com/PyModel/pythinker-code/blob/main/CONTRIBUTING.md)
document.
- [x] I have linked a related issue, or explained the problem above.
- [x] I have added tests that prove my feature works. (Mechanical
rename; existing suites cover it.)
- [x] Ran `gen-changesets` skill, or this PR needs no changeset.
- [x] Ran `gen-docs` skill, or this PR needs no doc update. (Docs
updated in the sweep.)

## Additional commits

- The sweep also caught encoded-scope references a plain replace misses:
api-extractor/tsdown/vitest regexes (`@pythoughts\/`), release-tag
parsing in `produce-manifest.mjs` and `install.sh`, `%40…%2F`
release-download URLs in the CDN build, and split specifiers in tests.
- One drive-along test-infra fix: `skill-session.test.ts` temp-dir
cleanup now retries, because a late journal flush races the recursive
delete under full-suite load and threw ENOTEMPTY twice while gating this
push.

This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to main, this PR will
be updated.


# Releases
## @pymodel/pythinker-code@0.17.0

### Minor Changes

- [#70](#70)
[`8506ded`](8506ded)
- Publish the CLI under the @PyModel npm scope; install with `npm
install -g @pymodel/pythinker-code`. The old @pythoughts scope is
deprecated and no longer receives releases.

### Patch Changes

- [#71](#71)
[`9d46551`](9d46551)
- Keep the current thinking effort when switching models in the model
picker instead of silently saving the new model's lowest level as the
default, and repair a stale thinking mode in the config when saving an
effort.

- [#67](#67)
[`5cb218f`](5cb218f)
- Keep the thinking effort chosen with Ctrl-T/Shift-Tab as the default
across restarts.

- [#68](#68)
[`b69205f`](b69205f)
- Show only the animated thinking indicator while the model thinks; the
streamed thinking text no longer appears in the transcript unless
expanded with Ctrl+O.

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>