feat: scaffold operator-first 3proxy panel ui

docs/PROJECT_INDEX.md

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+# Project Index
+
+Updated: 2026-04-01
+
+## Root
+
+- `AGENTS.md`: repository workflow rules for autonomous contributors
+- `README.md`: quick start and current project scope
+- `package.json`: frontend scripts and dependencies
+- `vite.config.ts`: Vite + Vitest configuration
+
+## Documentation
+
+- `docs/PLAN.md`: living implementation plan
+- `docs/PROJECT_INDEX.md`: this index
+- `docs/RESEARCH_3PROXY.md`: notes from official 3proxy documentation
+
+## Frontend
+
+- `src/main.tsx`: application bootstrap
+- `src/App.tsx`: authenticated panel shell and tab composition
+- `src/App.test.tsx`: login-gate component tests
+- `src/app.css`: full panel styling
+- `src/data/mockDashboard.ts`: realistic mock state shaped for future API responses
+- `src/lib/3proxy.ts`: formatting and status helpers
+- `src/lib/3proxy.test.ts`: paranoia-oriented tests for core domain rules
+- `src/test/setup.ts`: Testing Library matchers
+
+## Static
+
+- `public/favicon.svg`: Vite default icon placeholder, to replace later