Update flow.toml to start web and desktop dev servers with port management and cleanup logic; enhance desktop preload and main process to resolve preload path, set web URLs, and expose shell functions; improve README with load fallback info and environment variables; add external logs configuration to worker package.

pnpm-workspace.yaml

@@ -2,6 +2,7 @@ packages:
   - packages/*
 
 onlyBuiltDependencies:
+  - electron
   - esbuild
   - sharp
   - workerd