refactor: migrate workflow runtime to daemon and web app

[hileix]

Summary

• move workflow runtime, local storage, and daemon relay handling into apps/daemon
• replace the Electron/desktop client with apps/web plus a stateless apps/server relay
• remove the old backend/mobile/desktop runtime paths and add shared relay protocol package
• fix task deletion through CORS-safe empty-body DELETE requests

Validation

• pnpm --filter @dev-workflow/web build
• pnpm --filter @dev-workflow/server build
• prior daemon/protocol/web focused tests passed during implementation