- Add HeidiSQL-style database tree panel (Databases → Tables → Columns)
- Lazy loading with ttk.Treeview, context menus, double-click SELECT TOP 1000
- Fix pymysql thread safety: serialize all DB ops with threading.Lock
- Use lock.acquire(timeout=10) to prevent deadlocks between tree and query threads
- Always reset _executing flag in finally block to prevent stuck queries
- Add _ensure_connected() auto-reconnect on broken connections
- Add sql_client check_connection() null safety
- Add 12 tree-related i18n keys (EN/RU/ZH)
- Clean up old releases
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Full implementation of multi-type server management across GUI and CLI:
New clients: SQLClient (MariaDB/MSSQL/PostgreSQL), RedisClient, GrafanaClient,
PrometheusClient, TelnetSession, WinRMClient, RemoteDesktopLauncher.
New GUI tabs: QueryTab (SQL editor + Treeview), RedisTab (console + history),
GrafanaTab (dashboards + alerts), PrometheusTab (PromQL + targets),
PowershellTab (PS/CMD), LaunchTab (RDP/VNC external client).
Infrastructure: TAB_REGISTRY for conditional tabs per server type,
adaptive server_dialog fields, colored type badges in sidebar,
status checker for all types (SSH/TCP/SQL/Redis/HTTP), 100+ i18n keys.
CLI: ssh.py extended with --sql, --redis, --grafana-*, --prom-*, --ps, --cmd.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
