Include `e2e/` in `tsconfig.json` so Playwright specs are type-checked

[arasaka-net]

The include array in tsconfig.json restricts tsc to src, leaving the Playwright specs in e2e/ outside the type check. Broaden the include so npm run typecheck catches regressions in e2e tests as well.

Context
tsconfig.json currently sets "include": ["src"], which means tsc --noEmit never reads e2e/smoke.test.js. Any future Playwright helper that drifts from @playwright/test types — wrong fixture shape, misspelled locator API, missing await — will silently ship until it fails at runtime. Extending include to also cover e2e is a one-line change that tightens the LLM feedback loop: an agent that writes a new end-to-end test will get immediate type-check feedback instead of learning about the mistake only when Playwright runs.

Affected Files

• tsconfig.json:13 — extend include to ["src", "e2e"]

Requirements

• tsconfig.json include lists both src and e2e.
• npm run typecheck succeeds after the change with no new errors.
• If type errors surface in existing e2e code they are fixed in the same pull request.

Verification

• npm ci
• npm run typecheck
• grep -n '"e2e"' tsconfig.json

Not In Scope

• Do not enable checkJs — that is tracked separately by issue Enable checkJs in tsconfig.json to activate type checking on .js source files #170.
• Do not restructure the e2e directory layout or rename spec files.

Evidence

• tsconfig.json:13 — "include": ["src"] excludes the e2e directory from tsc
• e2e/smoke.test.js:1 — Playwright spec exists but is never visited by the type checker
• package.json:12 — typecheck script is plain tsc with no alternate project file to cover e2e

_{Arasaka Queue Planning Division.}