feat: introduce routing system

index.js

@@ -19,12 +19,7 @@ const PORT = process.env.PORT || 3000;
 // Serve static files from public directory
 app.use(express.static(path.join(__dirname, 'public')));
 
-// Serve the main HTML page
-app.get('/', (req, res) => {
-  res.sendFile(path.join(__dirname, 'public', 'index.html'));
-});
-
-// Health check endpoint
+// Health check endpoint (before catch-all route)
 app.get('/health', (req, res) => {
   res.json({
     status: 'healthy',
@@ -34,6 +29,13 @@ app.get('/health', (req, res) => {
   });
 });
 
+// SPA catch-all route - serves index.html for all routes
+// This allows client-side routing to work properly
+// Using regex pattern for Express 5 compatibility
+app.get(/^\/(?!health$).*/, (req, res) => {
+  res.sendFile(path.join(__dirname, 'public', 'index.html'));
+});
+
 // Start the server
 app.listen(PORT, '0.0.0.0', () => {
   console.log(`SPORE UI Frontend Server is running on http://0.0.0.0:${PORT}`);

public/index.html

@@ -18,7 +18,7 @@
                 </svg>
             </button>
             <div class="nav-left">
-                <button class="nav-tab active" data-view="cluster">
+                <a href="/cluster" class="nav-tab active" data-view="cluster">
                     <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="16" height="16" style="margin-right:6px;">
                         <circle cx="12" cy="12" r="9"/>
                         <circle cx="8" cy="10" r="1.5"/>
@@ -27,8 +27,8 @@
                         <path d="M9 11l3 3M9 11l6-3"/>
                     </svg>
                     Cluster
-                </button>
-                <button class="nav-tab" data-view="topology">
+                </a>
+                <a href="/topology" class="nav-tab" data-view="topology">
                     <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="16" height="16" style="margin-right:6px;">
                         <circle cx="12" cy="4" r="1.6"/>
                         <circle cx="19" cy="9" r="1.6"/>
@@ -38,20 +38,20 @@
                         <path d="M12 4L16 18M16 18L5 9M5 9L19 9M19 9L8 18M8 18L12 4"/>
                     </svg>
                     Topology
-                </button>
-                <button class="nav-tab" data-view="monitoring">
+                </a>
+                <a href="/monitoring" class="nav-tab" data-view="monitoring">
                     <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="16" height="16" style="margin-right:6px;">
                         <path d="M3 12h3l2 7 4-14 3 10 2-6h4"/>
                     </svg>
                     Monitoring
-                </button>
-                <button class="nav-tab" data-view="firmware">
+                </a>
+                <a href="/firmware" class="nav-tab" data-view="firmware">
                     <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" width="16" height="16" style="margin-right:6px;">
                         <path d="M4 7l8-4 8 4v10l-8 4-8-4z"/>
                         <path d="M12 8v8"/>
                     </svg>
                     Firmware
-                </button>
+                </a>
             </div>
             <div class="nav-right">
                 <div class="theme-switcher">

public/scripts/framework.js

@@ -647,7 +647,7 @@ class App {
     }
 
     // Navigate to a route
-    navigateTo(routeName) {
+    navigateTo(routeName, updateUrl = true) {
         // Check cooldown period
         const now = Date.now();
         if (now - this.lastNavigationTime < this.navigationCooldown) {
@@ -670,10 +670,45 @@ class App {
             return;
         }
 
+        // Update URL if requested
+        if (updateUrl) {
+            this.updateURL(routeName);
+        }
+
         this.lastNavigationTime = now;
         this.performNavigation(routeName);
     }
 
+    // Update browser URL
+    updateURL(routeName) {
+        const url = `/${routeName}`;
+        if (window.location.pathname !== url) {
+            window.history.pushState({ route: routeName }, '', url);
+            logger.debug(`App: Updated URL to ${url}`);
+        }
+    }
+
+    // Get route from current URL
+    getRouteFromURL() {
+        const path = window.location.pathname;
+        // Remove leading slash and use as route name
+        const routeName = path.substring(1) || 'cluster'; // default to cluster
+        return routeName;
+    }
+
+    // Handle browser back/forward
+    handlePopState(event) {
+        if (event.state && event.state.route) {
+            logger.debug(`App: Handling popstate for route '${event.state.route}'`);
+            this.navigateTo(event.state.route, false); // Don't update URL again
+        } else {
+            // Fallback: parse URL
+            const routeName = this.getRouteFromURL();
+            logger.debug(`App: Handling popstate, navigating to '${routeName}'`);
+            this.navigateTo(routeName, false);
+        }
+    }
+
     // Perform the actual navigation
     async performNavigation(routeName) {
         this.navigationInProgress = true;
@@ -848,12 +883,27 @@ class App {
 
     // Setup navigation
     setupNavigation() {
+        // Intercept navigation link clicks
         document.querySelectorAll((window.CONSTANTS && window.CONSTANTS.SELECTORS.NAV_TAB) || '.nav-tab').forEach(tab => {
-            tab.addEventListener('click', () => {
+            tab.addEventListener('click', (e) => {
+                e.preventDefault(); // Prevent default link behavior
                 const routeName = tab.dataset.view;
                 this.navigateTo(routeName);
             });
         });
+
+        // Handle browser back/forward buttons
+        window.addEventListener('popstate', (e) => this.handlePopState(e));
+
+        // Navigate to route based on current URL on initial load
+        const initialRoute = this.getRouteFromURL();
+        logger.debug(`App: Initial route from URL: '${initialRoute}'`);
+        
+        // Set initial history state
+        window.history.replaceState({ route: initialRoute }, '', `/${initialRoute}`);
+        
+        // Navigate to initial route
+        this.navigateTo(initialRoute, false); // Don't update URL since we just set it
     }
 
     // Clean up cached components (call when app is shutting down)

public/styles/main.css

@@ -128,6 +128,7 @@ button:disabled {
     justify-content: center;
     gap: 0.5rem;
     transition: all 0.2s ease;
+    text-decoration: none;
 }
 
 .nav-tab:hover {