feat: UX improvements and sink system (v2.2.0)

[chenliuyun]

Summary

• Sink system: Added 9 sink types for events mqtt-tail output routing — stdout, file, webhook, OpenClaw, Telegram, Home Assistant
• MCP get_device_history tool: New 9th MCP tool backed by DeviceHistoryStore (persists shadow snapshots per device)
• 20+ UX fixes from a comprehensive CLI audit (P0/P1/P2): field aliases, --filter in JSON mode, batch status --fields/--format, --name on expand/watch, role column in types table, example params in commands output, and more
• Bug fixes: --audit-log boolean flag, outer try/catch in devices command, case-insensitive command name suggestions, missing-parameter validation

Changes

Sink system (src/sinks/)

• types.ts, format.ts, dispatcher.ts — shared infrastructure
• stdout.ts, file.ts, webhook.ts, openclaw.ts, telegram.ts, homeassistant.ts — individual sinks
• events mqtt-tail gains --sink, --sink-file, --webhook-url, --openclaw-*, --telegram-*, --ha-* flags

MCP

• src/mcp/device-history.ts — DeviceHistoryStore persists shadow snapshots to ~/.switchbot/device-history/
• src/commands/mcp.ts — get_device_history tool (9th tool)

UX fixes

ID	Fix
BUG-1	--audit-log is now a boolean flag; add separate --audit-log-path
BUG-2/3	devices command outer try/catch + --name positional shift fix
BUG-7/P1-04	Case-insensitive command suggestion ("Did you mean getStatus?")
P0-05	Field aliases in devices list (type, room, hub, cloud)
P0-06/07	capabilities --minimal flag
P0-08	--timeout minimum 100 ms with warning
P0-09	--filter for devices list (type, name, category, room)
P1-02	Missing-parameter validation
P1-03	IR command shows "→ IR signal sent" (no fake ✓)
P1-05	scenes list --fields accepts id/name aliases
P1-06	devices status --ids for batch status
P1-08	--yes warns when used on non-destructive commands
P1-11	devices list --json returns { ok: true, deviceList, infraredRemoteList }
P1-13	devices status --ids supports --fields and --format jsonl
P1-14	plan validate warns when plan has 0 steps
P1-15	--name added to devices expand and devices watch
P1-16	devices status --json includes _fetchedAt timestamp
P2	devices list --json now respects --filter
P2	devices types table includes role column
P2	devices commands shows example params when available

Test plan

• npm run build && npm test — 697 tests passing
• switchbot devices list --filter category=physical --json — verifies filter in JSON mode
• switchbot devices status --ids <id1>,<id2> --fields power,battery — verifies batch fields
• switchbot devices expand --name "device-name" setAll --temp 26 --mode cool --fan low --power on
• switchbot devices watch --name "device-name" --max 1
• switchbot events mqtt-tail --sink file --sink-file /tmp/events.jsonl --max 1
• switchbot capabilities --json | jq '.data.mcpTools | length' — should be 9