Pin bread-theme to v0.7.1; document Super+U and unshipped ONNX model

bread-screenshots is not on the v0.7.1 tag, so it is rev-pinned instead
of floating on branch=main. bread-theme v0.7.1 has no adw/chip helpers;
breadman keeps local shims. CLAUDE.md records the single-trunk workflow.

CLAUDE.md

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+# CLAUDE.md — Repo hygiene
+
+Scope: this file covers *repo hygiene* — branching, remotes, CI, cleanup. It is not project documentation.
+
+This repo follows the branch/release workflow documented in `CONTRIBUTING.md`
+— read and follow it for any git, branch, or release work here (the
+single-trunk model, `feature/x`/`fix/x` branch naming, how RC tags work,
+etc). Don't improvise a different workflow. The short version: there is one
+long-lived branch, `main` — no `dev` or `beta` branch exists. `main`
+auto-publishes a dev-track build on every push. "Beta" and "stable" are both
+just tags, not branches: push a `vX.Y.Z-rc.N` tag to publish a beta-track
+build, push a plain `vX.Y.Z` tag to cut the signed stable release.
+"Freezing" for stabilization means pausing pushes to `main`, not moving a
+branch. This replaced an earlier three-branch (`dev`/`beta`/`main`) model
+after `main` was found to have silently rotted out of sync with `dev`/`beta`
+across most repos in this ecosystem.
+
+## Remotes
+- `origin` — Forgejo (`git.breadway.dev` via Hestia, SSH) — authoritative.
+- `github` — GitHub mirror. Push both when publishing.
+
+## CI
+- `check.yml` — clippy + test, triggers on push to `feature/**`/`fix/**`.
+- `dev-release.yml` — triggers on push to `main`.
+- `rc-release.yml` — triggers on `vX.Y.Z-rc.N` tag push.
+- `release.yml` — triggers on any other `v*` tag push.
+
+All four run on a self-hosted runner (`hestia`) inside a pinned Arch
+container — not the host's native environment. The Containerfile/build
+script are shared across bread-ecosystem products and live in
+`bread-ecosystem/ci/`; this repo's `ci/build.sh` clones that repo at the
+sha in `ci/bread-ecosystem.rev` (deliberately pinned, not `main`) and
+delegates to it. Nothing runs automatically on plain commits or PRs
+beyond what's listed.
+
+## Don't
+- Don't embed credentials in remote URLs — SSH or a credential helper only.