feat(scripts): filter test:backend by test name

[rlorenzo]

Summary

• npm run test:backend -- <TestClassName> now runs just the matching tests instead of the whole suite, mirroring the frontend's test:frontend -- <file-pattern> UX.
• Bare positional args become a --filter FullyQualifiedName~<pattern> expression (multiple patterns join with |); any arg starting with - passes through to dotnet test verbatim, so full filter expressions still work.
• Documents both single-test commands in CLAUDE.md and tightens the file for token efficiency (merges the duplicated JS/C# O(n²) rule, compresses commit-message/design-system guidance, folds Security into C# Standards, drops stale Windows shell hints while keeping the CRLF rule).

Lint config

• Adds no-implicit-globals: off to the existing scripts/** override in .oxlintrc.json. That rule is incompatible with the folder's plain-CommonJS top-level-function style (every script trips it); it only surfaced now because the pre-commit hook re-lints staged files and test-dotnet.js became staged.

Testing

• npm run test:backend -- HtmlToTextConverterTests → ran exactly that class's 10 tests (~2s).
• npm run test:backend -- --filter "FullyQualifiedName~...Convert_EmptyHtml_ReturnsEmptyString" → ran exactly 1 test, confirming verbatim passthrough.
• npm run test:backend (no args) → unchanged, runs the full suite.
• Pre-commit hook (lint + full test suite + build verify) passed on both commits.

[codecov-commenter]

Bundle Report

Bundle size has no change ✅

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 45.29%. Comparing base (8991c34) to head (16277d4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #257   +/-   ##
=======================================
  Coverage   45.29%   45.29%           
=======================================
  Files         897      897           
  Lines       51929    51929           
  Branches     4879     4879           
=======================================
  Hits        23522    23522           
  Misses      27803    27803           
  Partials      604      604           

Flag	Coverage Δ
backend	45.39% <ø> (ø)
frontend	43.41% <ø> (ø)

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[Copilot]

Pull request overview

This PR improves the developer experience of running backend tests by allowing npm run test:backend -- <pattern> to run only matching tests (via dotnet test --filter FullyQualifiedName~...), while still allowing full dotnet test argument passthrough when flags are provided. It also updates contributor docs and adjusts lint configuration to fit the scripts folder’s CommonJS style.

Changes:

• Add CLI argument parsing to scripts/test-dotnet.js to convert bare positional args into a --filter FullyQualifiedName~... expression (OR-joined with |), and passthrough when any arg starts with -.
• Document single-test usage for backend/frontend testing and tighten CLAUDE.md guidance.
• Disable no-implicit-globals for scripts/** in .oxlintrc.json to avoid incompatible linting with the scripts’ style.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
scripts/test-dotnet.js	Builds dotnet test args from npm CLI input to support test-name filtering and passthrough flags.
CLAUDE.md	Documents single-test commands and consolidates/updates engineering guidelines.
.oxlintrc.json	Updates scripts override to disable no-implicit-globals for CommonJS script patterns.