Implements the load-bearing TUI-requirements §2 hard requirements:
- Last-event clock: "last event Ns ago" always visible in the status bar while
in-session, updating every frame tick. Turns warn-colored when an active session
has gone quiet past the stale threshold — the "thinking vs hung" tell. The
WebSocket connection indicator (●/◌/○) already covers immediate drop visibility.
- Unknown-event raw fallback: applyServer now surfaces any unrecognized,
session-scoped event type as a raw row in the event stream instead of silently
dropping it (the frontend must not lie by omission). Recognized-but-unrendered
types (router.response, protocol_error) get an explicit no-op so the default
branch means genuinely unknown.
Tests: agoLabel formatting, unknown-event surfaces-as-row, known-ignored
no-spurious-row. Preview "session" frame exercises the clock.
Deferred: the full Go↔Kotlin per-event-type render matrix (§2 last bullet) — a
larger fixture effort than the core behaviors landed here.
kami
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