chore: patch project maps for loading-overlay and orphaned session entries

- Add loading-overlay.tsx to component maps
- Remove orphaned session-progress-panel.tsx and session-operations.tsx entries
- Refresh parent indexes after manual map edits

Quality gates: pytest 313 passed/34 skipped, npm run typecheck/lint clean,
npm test -- --run 87 passed

apps/web/.pi-map.md

@@ -4,7 +4,7 @@ dir: apps/web
 index: apps/web/.pi-map.index.md
 
 ## role
-Frontend web application providing a React-based UI with code editing, terminal, and routing capabilities for the "headquarter" project.
+Frontend web application serving as the browser-based UI for the project, built with React/Vite/TypeScript and deployed via nginx.
 ## files
 - .env.example | Template file defining example environment variables for frontend API and application URL configuration
 - .eslintrc.cjs | Configures ESLint for a TypeScript browser project with modern ECMAScript module support | dep: @typescript-eslint/parser, @typescript-eslint/eslint-plugin, eslint
@@ -16,7 +16,7 @@ Frontend web application providing a React-based UI with code editing, terminal,
 - tsconfig.json | TypeScript configuration file for a React project using Vite with modern ES2020 target and bundler module resolution | dep: typescript, react, vite
 - vite.config.ts | Configures Vite build tool for a React project with custom dev server port and Vitest test settings. | dep: vite, @vitejs/plugin-react
 ## arch
-Modern React SPA built with Vite and TypeScript, containerized via multi-stage Docker with nginx serving, featuring client-side routing and optimized static asset delivery.
+Modern SPA architecture using Vite for bundling, React for UI, TypeScript for type safety, with containerized nginx deployment and environment-driven configuration.
 ## tags
 react, eslint, vite, typescript, dom, application, nginx, web
 ## symbols