Keep Mac awake while agents run

[brennanb2025]

Summary

• upgrade the agent-awake Electron blocker to prevent-display-sleep while agents are working
• add platform lid-closed assertions where Orca can do that without mutating global power settings
• refresh assertions on power resume and update Settings copy/search metadata to reflect the current device

Platform behavior

• macOS: Orca starts a caffeinate -i -s assertion while eligible agents are working.
• Linux: Orca starts a systemd-inhibit --what=sleep:handle-lid-switch --mode=block assertion on supported systemd/logind systems.
• Windows: Orca keeps the computer/display awake for normal idle sleep, but lid-close behavior follows the user's device power settings. Orca does not change the global Windows power plan.

Testing

• pnpm exec vitest run --config config/vitest.config.ts src/main/linux-lid-sleep-assertion.test.ts src/main/agent-awake-service.test.ts src/main/agent-awake-service-platform-assertions.test.ts
• pnpm exec vitest run --config config/vitest.config.ts src/renderer/src/components/settings/AgentsPane.test.tsx
• SKIP_BUILD=1 pnpm exec playwright test tests/e2e/settings-agent-awake.spec.ts --config tests/playwright.config.ts --project=electron-headless --workers=1
• pnpm run typecheck

Notes

• Closed-lid behavior still depends on OS, hardware, AC power, and thermal/battery policy. This PR uses app-scoped assertions on macOS/Linux and intentionally avoids silently changing Windows power-plan settings.

Made with Orca 🐋