History tab: multi-select copy to clipboard — v0.8.1

[jamesabel]

Summary

Adds selection and clipboard copy to the History tab.

• The history tree now uses extended selection: Ctrl/Shift-click any mix of run rows and failed-test rows.
• Ctrl+C or right-click → Copy puts the highlighted rows on the clipboard, in visual (tree) order — run rows as tab-separated column values (pastes cleanly into a spreadsheet), failed-test rows as the test node_id. Copy with nothing selected is a no-op; the context-menu Copy is disabled then.
• Selections survive the per-tick rebuilds during an active run (keyed by run GUID, and test name for failed-test rows), the same way expansion state already does.
• Version bumped to 0.8.1.

Testing

• New tests in tests/test_history_tab.py: copy formatting and visual ordering, empty-selection no-op, and selection persistence across rebuilds.
• Full suite: 463 passed. ruff check / ruff format clean; ty diagnostics unchanged (13, all pre-existing).

🤖 Generated with Claude Code

[codecov-commenter]

Codecov Report

❌ Patch coverage is 84.31373% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.41%. Comparing base (1ca70cb) to head (b5a197b).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/pytest_fly/gui/history_tab/history_tab.py	84.31%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #165      +/-   ##
==========================================
- Coverage   87.44%   87.41%   -0.04%     
==========================================
  Files          71       71              
  Lines        5713     5759      +46     
==========================================
+ Hits         4996     5034      +38     
- Misses        717      725       +8     

☔ 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.