chore: repo refresh (2026-10)

[tlambert03]

Routine tooling refresh, one commit per step.

ci: autoupdate pre-commit hooks

• ruff-pre-commit v0.16.1 → v0.16.10
• mirrors-typos v1.48.0 → v1.51.1
• validate-pyproject v0.25 → '0.26' (upstream dropped the v prefix; quoted so YAML keeps it a string)
• mirrors-mypy v2.3.0 → v2.4.0

style: fix lint errors from hook updates

ruff-format now formats Python code blocks in Markdown docs: blank lines and quote style only, in 5 docs/ pages.

ci: bump GitHub Actions

• astral-sh/setup-uv v7 → v10.2.0, pinned by SHA (no floating @v8+ tags exist). Relevant breaking changes: v9 sets prune-cache default to false (larger GH cache usage); v10 disables enable-cache: auto for sensitive events, which doesn't affect us since we set enable-cache: true on push/PR events.
• pyvista/setup-headless-display-action v4 → v5 (qt: true input unchanged)
• hynek/build-and-inspect-python-package v2 → v3.0.1, pinned by SHA (no floating @v3 tag exists)

chore: drop Python 3.10, add 3.15

• requires-python = ">=3.11", 3.10 classifier removed, ruff target-version = "py311", "Python 3.11 and above" in README / CONTRIBUTING / docs.
• Added the 3.15 classifier and a ubuntu-latest (3.15) pyqt6 job.
• Matrix shifted up one version (adjusted in fix: shift CI matrix to 3.11/3.14): main list ["3.10", "3.13"] → ["3.11", "3.14"]. Include rows move up one version too: ubuntu pyqt5 3.10 → 3.11, windows pyqt5 3.11 → 3.12, macos lowest-direct 3.12 → 3.13, ubuntu pyqt6/pyside6 3.12 → 3.13. The ubuntu 3.14 pyqt6 row is now a main-matrix job, so it was removed. The windows lowest-direct pyside6 row stays on 3.11 because pyside6 ≥6.7 is required on 3.12+, and it's the only job testing pyside6 6.4.
• numpy test markers: removed the always-false < '3.11' line and simplified >= '3.11' and < '3.13' to < '3.13'.

refactor: modernize syntax for Python >= 3.11

UP036 removed the sys.version_info >= (3, 11) branch in QEnumComboBox's _get_name. I also deleted the now-unreachable pre-3.11 enum._decompose fallback.

Decisions

• Dropped 3.10: it reached EOL on 2026-10-01 (per peps.python.org release-cycle data).
• Added 3.15 (RC) to CI as a plain "3.15", with no extra flags. setup-uv/uv resolves it to the pre-release.

Needs attention

• Matrix merge: with 3.11 now in the main list, the include row windows-latest / 3.11 / pyside6 / lowest-direct matches an existing job, so GitHub turns that job into a lowest-direct run instead of adding a new one. The result is one fewer job: windows/3.11/pyside6 runs only lowest-direct. Windows pyside6 "highest" still runs on 3.14. There's a comment in the YAML.
• typing_extensions remains a dependency (TypedDict, ParamSpec imports untouched; ruff didn't flag them).
• The manual-stage mypy hook reports about 160 errors; these exist on main too and weren't changed here.

Superseded PRs

Closes #354
Closes #352

Branch protection

Classic branch protection on main (required status checks; strict: false and app IDs unchanged):

• macos-latest (3.12) pyqt6 lowest-direct → macos-latest (3.13) pyqt6 lowest-direct
• windows-latest (3.10) pyside6 → windows-latest (3.14) pyside6. The windows/3.11/pyside6 "highest" job no longer exists (see the matrix merge note).
• ubuntu-latest (3.10) pyqt5 → ubuntu-latest (3.11) pyqt5
• unchanged: pre-commit.ci - pr, ubuntu-latest (3.14) pyqt6, windows-latest (3.11) pyside6 lowest-direct

Consequences: other open PRs built on the old matrix won't report the new names until they're rebased or re-run. If this PR is closed without merging, revert the rule. The original rule is saved locally and was:
pre-commit.ci - pr, macos-latest (3.12) pyqt6 lowest-direct, windows-latest (3.10) pyside6, ubuntu-latest (3.10) pyqt5, ubuntu-latest (3.14) pyqt6, windows-latest (3.11) pyside6 lowest-direct.

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 84.81%. Comparing base (a175047) to head (fbb31a8).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/superqt/combobox/_enum_combobox.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #356      +/-   ##
==========================================
- Coverage   84.90%   84.81%   -0.10%     
==========================================
  Files          49       49              
  Lines        3928     3924       -4     
==========================================
- Hits         3335     3328       -7     
- Misses        593      596       +3     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.