The web server is long-lived, so cache what the per-invocation CLI cannot:
- Cache the parsed local payload in-memory (single-flight, 180s TTL matched to
the parser session cache, expired entries pruned on write). /api/usage and the
local half of /api/devices now return from a Map hit after the first parse.
- Prewarm today at startup and inline that payload into index.html as a
bootstrap, so the SPA paints today's numbers with no round-trip. Only the
local device is embedded; '<' is escaped so a name cannot break the script
tag; served no-store; the seeded view refetches at once so live peers appear.
- Default the web command and dashboard to today.
- Cap the peer connect phase at 3s. req.setTimeout does not abort a stalled TCP
connect, so an offline paired device hung ~75s on the OS timeout; it now
degrades to an unreachable row in ~3s. The cap clears on TCP connect, so the
TLS handshake and the 65s pairing-approval wait are unaffected.
Measured: /api/usage 0.0007s warm (was ~0.22s), /api/devices ~3s with an offline
peer (was ~75s), first paint instant.
