refactor(mcp): centralize version banner metadata

[0xble]

Summary

• add a single source of truth for MCP version metadata (PeekabooMCPVersion)
• replace hardcoded Peekaboo MCP 3.0.0-beta4 strings across MCP tool descriptions
• use centralized version constants in MCP server identity and list --item_type server_status
• add regression tests ensuring list tool description and server status output use centralized version metadata

Why

MCP version strings were duplicated across many files. This causes drift and confusion (e.g. mixed/stale beta labels) and makes version updates error-prone.

Changes

• Core/PeekabooCore/Sources/PeekabooAgentRuntime/MCP/PeekabooMCPVersion.swift
  • new centralized metadata:
    • serverName
    • current
    • banner
• PeekabooMCPServer.swift
  • replace hardcoded serverName/serverVersion
• MCP tool files (analyze/click/dock/drag/hotkey/list/agent/menu/move/permissions/scroll/see/sleep/space/swipe/type/window)
  • replace hardcoded Peekaboo MCP 3.0.0-beta4 with \(PeekabooMCPVersion.banner)
• MCPToolExecutionTests.swift
  • add tests to verify:
    • ListTool.description includes PeekabooMCPVersion.banner
    • server_status output includes Version: \(PeekabooMCPVersion.current)

Validation

• swift test --package-path Core/PeekabooCore --filter MCPToolExecutionTests --no-parallel (passed)
• swift test --package-path Core/PeekabooCore --filter MCPToolDescriptionTests --no-parallel (passed)
• swift test --package-path Core/PeekabooCore --filter PeekabooMCPServerTests --no-parallel (passed)
• swift test --package-path Core/PeekabooCore --filter MCP --no-parallel (blocked)
  • fails on pre-existing MCPSpecificToolTests dialog schema expectations (window/index), unrelated to this change set.

[steipete]

Landed via temp rebase onto main.

• Gate: pnpm run lint && pnpm run build:cli && pnpm run test:safe
• Land commit: d591eba57c1ef18b8d3d24ad61215815b3eeb5f4
• Merge commit: 9261ddf

Thanks @0xble!