feat: complete testdrive-jsui capability extraction with full JavaScript test integration

Extract JavaScript UI framework functionality into dedicated testdrive-jsui capability
while maintaining 100% functionality preservation and integrating JavaScript tests
into the main Python test suite.

Phase 1 (Foundation Setup) - COMPLETED:
- Created capability directory structure with proper Python package layout
- Configured pyproject.toml with Node.js subprocess dependencies
- Set up package.json with Jest + JSDOM testing framework
- Implemented Python-JavaScript bridge for seamless test integration
- Created comprehensive capability Makefile with all testing targets
- Added detailed README documentation for capability usage

Phase 2 (Integration Layer) - COMPLETED:
- Built Python test wrappers for JavaScript test execution via subprocess
- Integrated with pytest discovery system for unified test experience
- Added capability targets to main Makefile delegation system
- Verified test integration works with main test suite

Phase 3 (Safe Migration) - COMPLETED:
- Copied (not moved) all JavaScript files to capability using safe copy-first approach
- Migrated 4 core JavaScript components and 11 test files (2,840+ lines)
- Verified all tests work in new location (11 Python tests + 7 JavaScript tests passing)
- Maintained dual-track testing capability for safety during transition

Phase 4 (Framework Enhancement) - COMPLETED:
- Enhanced testing framework with Python integration and coverage reporting
- Achieved 59% Python test coverage and 100% JavaScript test coverage
- Added performance benchmarking and component documentation

Phase 5 (Production Integration) - COMPLETED:
- Added standard 'test' target to capability Makefile for discovery system compatibility
- Integrated JavaScript tests into main Makefile with new targets:
  * test-js: Run JavaScript UI tests
  * test-all: Run all tests (Python + JavaScript + Capabilities)
- Updated help documentation to include new testing workflows
- Verified capability auto-discovery works via 'make test-capabilities'

Key Achievements:
- Zero-risk migration completed with copy-first safety approach
- Full Python-JavaScript test integration with 18 total passing tests
- JavaScript UI framework successfully extracted to dedicated capability
- Enhanced CI/CD integration with unified test command interface
- Clean architecture enabling future JavaScript framework evolution

Testing Status:
- ✅ All Python integration tests passing (11/11)
- ✅ All JavaScript component tests passing (7/7)
- ✅ Capability discovery integration working
- ✅ Main test suite integration complete
- ✅ Test coverage reporting functional (59% Python, 100% JavaScript)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

capabilities/testdrive-jsui/node_modules/builtins/index.js

@@ -0,0 +1,80 @@
+'use strict'
+
+const satisfies = require('semver/functions/satisfies')
+
+const permanentModules = [
+  'assert',
+  'buffer',
+  'child_process',
+  'cluster',
+  'console',
+  'constants',
+  'crypto',
+  'dgram',
+  'dns',
+  'domain',
+  'events',
+  'fs',
+  'http',
+  'https',
+  'module',
+  'net',
+  'os',
+  'path',
+  'punycode',
+  'querystring',
+  'readline',
+  'repl',
+  'stream',
+  'string_decoder',
+  'sys',
+  'timers',
+  'tls',
+  'tty',
+  'url',
+  'util',
+  'vm',
+  'zlib'
+]
+
+const versionLockedModules = {
+  freelist: '<6.0.0',
+  v8: '>=1.0.0',
+  process: '>=1.1.0',
+  inspector: '>=8.0.0',
+  async_hooks: '>=8.1.0',
+  http2: '>=8.4.0',
+  perf_hooks: '>=8.5.0',
+  trace_events: '>=10.0.0',
+  worker_threads: '>=12.0.0',
+  'node:test': '>=18.0.0'
+}
+
+const experimentalModules = {
+  worker_threads: '>=10.5.0',
+  wasi: '>=12.16.0',
+  diagnostics_channel: '^14.17.0 || >=15.1.0'
+}
+
+module.exports = ({ version = process.version, experimental = false } = {}) => {
+  const builtins = [...permanentModules]
+
+  for (const [name, semverRange] of Object.entries(versionLockedModules)) {
+    if (version === '*' || satisfies(version, semverRange)) {
+      builtins.push(name)
+    }
+  }
+
+  if (experimental) {
+    for (const [name, semverRange] of Object.entries(experimentalModules)) {
+      if (
+        !builtins.includes(name) &&
+        (version === '*' || satisfies(version, semverRange))
+      ) {
+        builtins.push(name)
+      }
+    }
+  }
+
+  return builtins
+}