feat(desktop): add hot renderer CPU diagnostics#625
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Summary
Released builds can now turn on hot renderer CPU profiling from Settings, so renderer CPU spikes can be captured in the app instance that is actually misbehaving instead of requiring a terminal-launched dev session.
The monitor samples Electron process metrics and records a short Chrome
.cpuprofileafter sustained hot renderer CPU, then detaches. Artifacts are written under the active PwrAgent profile'sstate/diagnosticsdirectory so packaged apps have a writable, profile-scoped output location. The env-driven dev workflow remains available throughprofile:hot-cpu.Test Plan
pnpm test apps/desktop/src/main/__tests__/app-bootstrap.test.ts apps/desktop/src/main/__tests__/index.test.ts apps/desktop/src/main/__tests__/desktop-settings-patch-translator.test.ts apps/desktop/src/main/__tests__/desktop-settings-service.test.ts apps/desktop/src/renderer/src/features/settings/__tests__/settings-screen.test.tsx apps/desktop/src/main/__tests__/renderer-hot-cpu-profiler.test.ts packages/shared/src/contracts/__tests__/settings.test.tspnpm --filter @pwragent/desktop typecheckpnpm --filter @pwragent/shared typecheck