Add editable system configuration flow

docs/PROJECT_INDEX.md

@@ -1,6 +1,6 @@
 # Project Index
 
-Updated: 2026-04-01
+Updated: 2026-04-02
 
 ## Root
 
@@ -23,20 +23,22 @@ Updated: 2026-04-01
 ## Frontend
 
 - `src/main.tsx`: application bootstrap
-- `src/App.tsx`: authenticated panel shell wired to backend APIs with local fallback behavior
-- `src/App.test.tsx`: login-gate, modal interaction, pause/resume, and delete-confirm tests
+- `src/App.tsx`: authenticated panel shell with API-backed dashboard/user flows and validated local fallback mutations
+- `src/SystemTab.tsx`: editable runtime/system form for host, modes, and managed services
+- `src/App.test.tsx`: login-gate, modal interaction, pause/resume, delete-confirm, and system-save UI tests
 - `src/app.css`: full panel styling
 - `src/data/mockDashboard.ts`: default panel state and frontend fallback snapshot
 - `src/lib/3proxy.ts`: formatting and status helpers
 - `src/lib/3proxy.test.ts`: paranoia-oriented tests for core domain rules
 - `src/shared/contracts.ts`: shared panel, service, user, and API data contracts
+- `src/shared/validation.ts`: shared validation for user creation, system edits, protocol mapping, and quota conversion
 - `src/test/setup.ts`: Testing Library matchers
 
 ## Server
 
 - `server/index.ts`: backend entrypoint and runtime bootstrap
-- `server/app.ts`: Express app with panel state and runtime routes
-- `server/app.test.ts`: API tests for user management edge cases
+- `server/app.ts`: Express app with panel state, runtime routes, and writable system configuration API
+- `server/app.test.ts`: API tests for user management plus system-update safety edge cases
 - `server/lib/config.ts`: 3proxy config renderer, validation, and dashboard derivation
 - `server/lib/config.test.ts`: config-generation regression tests
 - `server/lib/runtime.ts`: managed 3proxy process controller