[vrubezhny]

• Re-color the Mocha 'spec' reporter output for dark terminal themes: passing test titles, failure stack traces and durations are rendered in 'bright black' (ANSI 90), which is nearly invisible on dark themes like VS Code Dark Modern (#3b3b3b on #1f1f1f); they now use the terminal's default foreground color, keeping the colored checkmarks, diffs and summaries
• Add a shared createMocha() factory (test/mocha-config.ts) combining the options common to all test kinds (spec reporter, tdd ui, colors, palette) with the test-kind specific ones; drop the dead 'require: [./helper.js]' option (CLI-only, and the file does not exist)
• Stop setting NODE_OPTIONS in build/run-tests.cjs and delete the dead test/bootstrap.ts: VS Code strips NODE_OPTIONS from the extension host environment, so the ESM-to-CJS alias bootstrap never actually loaded there (the extension host, Node.js >= 22.12, natively require()s the ESM-only dependencies); the variable only made the Electron main and renderer processes print "Most NODE_OPTIONs are not supported in packaged apps" errors
• Disable the GPU of the test VS Code instance: it renders with software rendering anyway, and this prevents "'--ozone-platform=wayland' is not compatible with Vulkan" errors on Wayland sessions
• Load 'istanbul' and 'remap-istanbul' lazily in test/coverage.ts: loading the test-only istanbul package on every run triggered a Node.js circular-dependency warning; it is now loaded only when coverage data was actually collected
• Log the 'Installed extensions' debug list from the activation test only when VERBOSE is set

Assisted-By: OpenCode: GLM 5.3

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.71%. Comparing base (d516eb4) to head (cc3ad80).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6237   +/-   ##
=======================================
  Coverage   53.71%   53.71%           
=======================================
  Files         131      131           
  Lines       12007    12007           
  Branches     2699     2718   +19     
=======================================
  Hits         6449     6449           
  Misses       5552     5552           
  Partials        6        6           

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