feat: Implement initial setup service for admin user creation

- Added `SetupService` to handle the generation and validation of setup tokens.
- Integrated setup token generation during application startup if no admin users exist.
- Created API endpoints for checking setup status and completing the initial setup.
- Updated `AuthService` to include functionality for creating the initial admin user.
- Enhanced error handling for setup and authentication processes.
- Added frontend components for login and protected routes.
- Implemented Zustand store for managing authentication state.
- Updated Vite configuration to check setup status and serve the setup page if required.
- Documented the initial setup process in `setup.md`.

crates/nxmesh-master/src/lib.rs

@@ -37,10 +37,42 @@ pub async fn start(settings: Settings) -> Result<(), Box<dyn std::error::Error>>
     info!("Database migrations complete");
 
     // Create application state
-    let app_state = api::routes::AppState {
-        db: db.clone(),
-        settings: settings.clone(),
-    };
+    let app_state = api::routes::AppState::new(db.clone(), settings.clone());
+    
+    // Generate setup token if no admin exists
+    match app_state.setup_service.has_admin_users().await {
+        Ok(false) => {
+            info!("=================================================================");
+            info!("                     INITIAL SETUP REQUIRED                      ");
+            info!("=================================================================");
+            info!("No admin user found. A setup token has been generated.");
+            info!("");
+            
+            match app_state.setup_service.generate_setup_token().await {
+                Ok(token_info) => {
+                    info!("SETUP TOKEN: {}", token_info.plain_token);
+                    info!("EXPIRES AT:  {}", token_info.expires_at);
+                    info!("");
+                    info!("Use this token to create the first admin account at:");
+                    info!("  http://{}:{}/setup", settings.server.bind_address, settings.server.port);
+                    info!("");
+                    info!("WARNING: This token is single-use and will expire in 24 hours.");
+                    info!("         It is displayed only once in these logs.");
+                }
+                Err(e) => {
+                    error!("Failed to generate setup token: {}", e);
+                }
+            }
+            
+            info!("=================================================================");
+        }
+        Ok(true) => {
+            info!("Admin user exists - initial setup already completed");
+        }
+        Err(e) => {
+            error!("Failed to check admin status: {}", e);
+        }
+    }
 
     // Create router
     let app = api::routes::create_router(app_state);