release: 0.5.0

[DLANSAMA]

Cuts 0.5.0. Version bump plus the changelog freeze — nothing else.

What ships

plate tui — the optional full-screen terminal UI (pip install 'platecli[tui]'): live dashboard, guided prepare screen with AMS-detected material and advanced slice settings, an explicit print-confirmation dialog, and a live job monitor. It is a front-end over the same shared pipeline plate go runs, so the two cannot drift, and a print still starts only from the confirm dialog.

Also in this release: the deep-audit fix wave (MQTT print-path integrity — no false Print started on a refused CONNACK, no reconnect re-publishing a print command; config/secrets hardening; download/slice/job pipeline correctness; the CLI JSON contract), the B.4 refactor that stopped domain modules importing private _underscore helpers from cli.py, generated schemas, and the test decomposition.

Mechanics

• pyproject.toml 0.5.0.dev0 → 0.5.0. The .devN must be dropped: release.yml:46-53 compares the tag to the version exactly, so v0.5.0 against 0.5.0.dev0 fails late, after the full matrix has run.
• uv.lock carries the project version too and is bumped with it, as it was for the 0.5.0.dev0 bump in chore: carry 0.5.0.dev0 on main between releases #87.
• [Unreleased] frozen as ## [0.5.0] - 2026-08-05, empty [Unreleased] retained, diff-link refs updated — same shape as the 0.4.0 release commit (7598dde).

After this merges: tag v0.5.0, which triggers release.yml (full CI matrix → build → PyPI via trusted publishing → GitHub Release). Then a follow-up PR bumps main to 0.6.0.dev0, so a source checkout never reports a released version while running unreleased code.

Verified locally on this branch

ruff check              All checks passed!
ruff format --check     88 files already formatted
mypy -p bambu_cli       Success: no issues found in 88 source files
bandit -ll              Medium: 0  High: 0   (by severity; the by-confidence block is not the gate)
pytest -m "not live"    1419 passed, 1 deselected — coverage 89.09% (floor 83)
syntax_smoke            ok (185 files)
cli_help_smoke          ok (21 subcommands)
ci_workflow_smoke       ok (21 CLI commands, 88 package modules)
python_compat_smoke     ok
uv build                platecli-0.5.0.tar.gz + platecli-0.5.0-py3-none-any.whl
package_contents_smoke  ok

Wheel metadata reads Version: 0.5.0 with Provides-Extra: tui, and ships all 19 bambu_cli/tui/ files including styles.tcss and the new widgets/summary.py.

Not verified locally: the Windows/macOS legs and pip-audit (CI only), and the post-publish pip install check, which happens after the tag.