Add e2e adapter harness and restore webview build

[jhlagado]

Summary\n- add DAP e2e test harness with a simple fixture and prebuilt artifacts\n- align fixture paths and mock VS Code workspace to load sources correctly\n- restore webview sources and build script; align ESLint/TS config for webview\n\n## Testing\n- yarn test:e2e:adapter\n- yarn lint\n- yarn build\n

[jhlagado]

PR Review: Add e2e adapter harness and restore webview build

CI Status

FAILING - The e2e tests are being picked up by the regular yarn test run, but the vscode mock alias is only defined in vitest.e2e.config.ts.

Error:

Failed to load url vscode (resolved id: vscode) in src/debug/path-resolver.ts

Fix: Exclude e2e tests from the main vitest.config.ts:

// vitest.config.ts
test: {
  exclude: ['tests/e2e/**', ...configDefaults.exclude],
}

Or add the vscode alias to the main config (less clean).

Summary

This PR adds a DAP e2e test harness that exercises the full debug adapter lifecycle in-process. Good foundation for Phase 5 (test coverage).

Changes Reviewed

1. DAP Client (dap-client.ts - 200 LOC)

• Clean implementation of DAP protocol wire format
• Request/response with timeout handling
• Event waiting with predicate support
• Proper buffer management for streaming

2. Test Harness (adapter.e2e.test.ts - 130 LOC)

• In-process adapter via PassThrough streams
• Tests: stopOnEntry, breakpoint hit, stack trace verification
• Mock workspace setup via vscode-mock.ts

3. Fixture (tests/e2e/fixtures/simple/)

• Minimal Z80 program (5 lines)
• Prebuilt artifacts (HEX, LST, d8dbg.json)
• Complete debug80.json config

4. Separate E2E Config (vitest.e2e.config.ts)

• Mocks vscode module via alias
• 20s timeout for adapter startup
• Separate test run: yarn test:e2e:adapter

Architecture

tests/e2e/
├── adapter/
│   ├── adapter.e2e.test.ts  # Test cases
│   ├── dap-client.ts        # DAP protocol client
│   └── vscode-mock.ts       # Minimal vscode stub
└── fixtures/
    └── simple/              # Minimal test project

Stats

• 12 files changed
• +496 / -1 lines

Verdict

Ship it once the test exclusion is fixed. Solid e2e foundation.

[jhlagado]

Pushed fix for CI failure: exclude tests/e2e/** from the default vitest.config.ts run, keeping the vscode alias only in vitest.e2e.config.ts (run via yarn test:e2e:adapter).

Local: yarn test passes; yarn test:e2e:adapter passes.

[jhlagado]

Follow-up:

• Merged latest main into this branch to pick up recent TEC-1G changes/tests.
• Fixed TEC-1G SYS_INPUT PROTECT/EXPAND reporting on startup by decoding the initial SYS_CTRL latch into state.protectEnabled/state.expandEnabled.
• Bumped tests/extension/extension.test.ts per-test timeout to 20s to avoid occasional slow-import timeouts.

Local: yarn test + yarn test:e2e:adapter pass.