feat(conduit): add Build-insights button + POST endpoint; fix command to a home-relative path

[elhoim]

What this adds

The Conduit page's empty state used to only tell you to run a bun command by hand (bun Conduit/BuildInsight.ts, which fails unless your cwd is LIFEOS/PULSE/). This adds a real Build insights now button and fixes the fallback command.

Backend (modules/conduit.ts): a new POST /api/conduit/build route runs BuildInsight.ts (the same script the hourly launchd job runs) and returns { ok, output }. GET is not handled, so only the button's POST triggers it.

Frontend (conduit/page.tsx): the empty state now shows a Build insights now button that POSTs to the endpoint, shows a Building… state, reports the result, and refetches the insight. The terminal fallback command is corrected to a home-relative path: bun ~/.claude/LIFEOS/PULSE/Conduit/BuildInsight.ts.

Verification (live)

• bun build modules/conduit.ts → OK; bun run build (Observability) → compiled, /conduit route emitted.
• curl -X POST /api/conduit/build → {"ok":true,"output":"[]\n"} (runs the script; [] because no events today).
• curl /conduit → 200; GET /api/conduit/build → 404 (POST-only).
• Visual button interaction not browser-verified (headless host, no Chrome) — logic compiles and the endpoint it calls is confirmed working.

Files

• LifeOS/install/LIFEOS/PULSE/modules/conduit.ts
• LifeOS/install/LIFEOS/PULSE/Observability/src/app/conduit/page.tsx