* fix(mcp): close orphaned servers that no app ever claims
- Add ServerOptions.appAttachTimeoutMs: if no app registers within this
window after startup, the server closes itself and removes its
discovery file, instead of squatting the port indefinitely.
- Wire it through the openpencil-mcp-http CLI as
OPENPENCIL_MCP_APP_TIMEOUT_MS (opt-in, unset/0 disables it — a bare
CLI invocation for manual testing should not self-terminate).
- The desktop app opts in with a 30s timeout when it spawns the server.
Without this, a server that outlives its spawning app (renderer crash,
forced reload) keeps holding its port with a stale discovery file. The
app's liveness check only asks whether something answers /health, not
whether an app has ever registered (see /health's no_app status) — so
every later launch finds the orphan already listening and defers to
it, and MCP tool calls fail with "app is not connected" until someone
manually kills the orphaned process. Closing self-caused orphans at
the source means the next launch finds no discovery file and takes
the normal fresh-spawn path.
Fixes#488
* fix(mcp): clean up servers after app disconnects
- Re-arm the orphan watchdog when the registered app disconnects
- Cancel pending shutdown when the app reconnects within the grace period
- Reject timeout values that overflow the runtime timer range
* test(mcp): make watchdog reconnect coverage deterministic
- Wait for the disconnected health state before reconnecting
- Report distinct safe-integer and timer-range validation errors
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Co-authored-by: swe-sanad <sanad.arousi@export119.com>
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