docs(CLAUDE.md): clarify that desktop:build produces the Electron bundle

npm run app:build compiles TypeScript workspaces but does not run
electron-vite, so out/main/index.js is never produced. app:start
(electron out/main/index.js) therefore fails unless desktop:build ran
first. Document the correct three-step production flow.

Refs #144
Co-Authored-By: copilot-pull-request-reviewer (via PR comment)

Author: CoderCoco

CLAUDE.md

@@ -18,8 +18,9 @@ npm install
 npm run app:dev          # delegates to desktop:dev — equivalent to: npm run desktop:dev
 
 # Production build then launch
-npm run app:build        # compiles shared → desktop-main → web TypeScript
-npm run app:start        # starts the built Electron app
+npm run app:build        # compiles shared → desktop-main → web TypeScript (not the Electron bundle)
+npm run desktop:build    # electron-vite build → produces out/main, out/preload, out/renderer
+npm run app:start        # starts the built Electron app (requires desktop:build to have run first)
 
 # Electron desktop app — electron-vite drives three pipelines (main/preload/renderer)
 # configured in electron.vite.config.ts; outputs land in out/main, out/preload, out/renderer