Add tool analytics panel

[DorianZheng]

Summary

• Add a Tool Analytics route and sidebar/command entry.
• Fetch AgentLite tool usage through a new Electron IPC bridge and aggregate active-agent tool summaries for the last hour.
• Render top tools by call count with error count, error rate, and average duration.

Validation

• pnpm run typecheck
• pnpm vitest run tests/unit/src/renderer/app/workspaces/ToolAnalyticsWorkspace.test.tsx tests/unit/src/electron/main/ipc/register-main-ipc-handlers.test.ts tests/unit/src/electron/preload.test.ts tests/unit/src/shared/electron/ipc-channels.test.ts tests/unit/src/renderer/app/shell/CommandMenu.test.tsx --coverage=false

Notes

• Full pnpm test currently fails on existing suite issues also reproducible on the original checkout, including AppShell tests, runtime snapshot reconciliation tests, settings section order, and tests/unit/build/install-guard.test.ts requiring a missing ./install-guard.cjs.