chrome-storm-c442 85a8c3ffc6 fix: SSH keepalive + auto-reconnect for SFTP and terminal ...

- Add transport.set_keepalive(30) to all SSH connections
- Add SFTPSession.reconnect() method
- Auto-reconnect in _refresh_remote with retry on failure
- Auto-reconnect before upload/download operations
- Guard all remote navigation methods with connection checks
- ShellSession.connected wrapped in try/except
- Terminal: reset reconnect counter on send failure, increase max to 5
- Terminal: trigger reconnect on send to dead session

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-24 02:25:40 -05:00

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