chore(tui): clean stale dist/ artifacts and useClock remnants

[JeremyDev87]

Severity: MEDIUM + LOW

1. dist/ stale files (MEDIUM)

dist/src/tui/hooks/ contains use-clock.js, use-clock.d.ts, use-clock.js.map from deleted source. Incremental build doesn't clean old outputs.

Fix: Add clean script:

"clean": "rm -rf dist/",
"build": "yarn clean && tsc"

2. useClock JSDoc comment remnant (LOW)

header-bar.pure.ts:3 references deleted use-clock.ts. Also formatTime may be dead code superseded by formatTimeWithSeconds.

Fix: Remove/update JSDoc, check if formatTime is unused.

Files to Modify

• apps/mcp-server/package.json — add clean script
• apps/mcp-server/src/tui/components/header-bar.pure.ts:3 — fix JSDoc