feat(daemon): auto-reconnect when CDP WebSocket closes

[Hexthebaldy]

Closes #180

Problem

When Chrome closes or restarts, the CDP WebSocket drops and the daemon
permanently returns HTTP 503 for all subsequent commands. Users must
manually restart both Chrome and the daemon to recover.

Solution

Add auto-reconnect logic to CdpConnection. When the WebSocket closes
unexpectedly, the daemon retries the connection every 5 seconds until
Chrome becomes available again. Commands arriving during reconnect are
queued via waitUntilReady() instead of failing immediately.

Key changes in packages/daemon/src/cdp-connection.ts:

• intentionalClose flag distinguishes graceful shutdown from unexpected
  disconnects — only the latter triggers reconnect
• scheduleReconnect() clears stale session state and calls connect()
  on a fixed 5s interval
• waitUntilReady() queues callers when a reconnect is in progress
  instead of rejecting with the last error
• disconnect() cancels any pending reconnect timer

packages/daemon/src/http-server.ts:

• /status endpoint exposes cdpReconnecting field

Screenshots

Chrome killed → auto-reconnect → Chrome restarted → recovered