Fix dynamic version display and update button issues

- Updated footer version to dynamically display current running version
- Fixed update button disappearing when refreshing status
- Added version tracking to prevent update button from hiding
- Updated About modal to show current version and added v2.0.10 to version history
- Fixed error handling in update check process

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

public/index.html

@@ -545,7 +545,7 @@
             <div class="container">
                 <div class="row">
                     <div class="col-md-6">
-                        <p>Transmission RSS Manager v2.0.6</p>
+                        <p>Transmission RSS Manager <span id="footer-version">v2.0.10</span></p>
                     </div>
                     <div class="col-md-6 text-right">
                         <p><a href="https://git.powerdata.dk/masterdraco/transmission-rss-manager" target="_blank" rel="noopener noreferrer">GitHub</a> | <a href="#" id="show-about-modal">About</a></p>
@@ -592,6 +592,26 @@
                 
                 <h4>Version History</h4>
                 <div class="version-history">
+                    <div class="version">
+                        <h5>v2.0.10 - March 2025</h5>
+                        <ul>
+                            <li><strong>Fixed</strong>: fs.existsSync error in update check</li>
+                            <li><strong>Fixed</strong>: Update button now stays visible when update is available</li>
+                            <li><strong>Fixed</strong>: Footer version now shows correct running version</li>
+                            <li><strong>Improved</strong>: Better error handling for git repository checks</li>
+                            <li><strong>Improved</strong>: More robust file system operations for update detection</li>
+                        </ul>
+                    </div>
+                    <div class="version">
+                        <h5>v2.0.9 - March 2025</h5>
+                        <ul>
+                            <li><strong>Fixed</strong>: Update button now appears properly on dashboard</li>
+                            <li><strong>Fixed</strong>: Remote Transmission connection issues resolved</li>
+                            <li><strong>Fixed</strong>: Improved connection test with better error handling</li>
+                            <li><strong>Added</strong>: System status and update endpoints for version checking</li>
+                            <li><strong>Improved</strong>: Update detection and notification on dashboard</li>
+                        </ul>
+                    </div>
                     <div class="version">
                         <h5>v2.0.6 - March 2025</h5>
                         <ul>
@@ -638,7 +658,7 @@
                 </div>
                 
                 <div class="text-center mt-4">
-                    <p><strong>Transmission RSS Manager v2.0.0</strong></p>
+                    <p><strong>Transmission RSS Manager v2.0.10</strong></p>
                     <p>© 2025 PowerData.dk - All Rights Reserved</p>
                     <p><a href="https://powerdata.dk" target="_blank">Visit PowerData.dk</a></p>
                 </div>

public/js/system-status.js

@@ -22,9 +22,22 @@ function initSystemStatus() {
       .then(handleResponse)
       .then(data => {
         if (data.status === 'success') {
+          // Update version display
           versionElement.textContent = data.data.version;
           uptimeElement.textContent = data.data.uptime;
           
+          // Also update footer version
+          const footerVersion = document.getElementById('footer-version');
+          if (footerVersion) {
+            footerVersion.textContent = 'v' + data.data.version;
+          }
+
+          // Update version in about modal too if it exists
+          const aboutVersionElement = document.querySelector('.text-center.mt-4 strong');
+          if (aboutVersionElement && aboutVersionElement.textContent.includes('Transmission RSS Manager v')) {
+            aboutVersionElement.textContent = 'Transmission RSS Manager v' + data.data.version;
+          }
+          
           // Update transmission status with icon
           if (data.data.transmissionStatus === 'Connected') {
             transmissionStatusElement.innerHTML = '<i class="fas fa-check-circle text-success"></i> Connected';
@@ -41,10 +54,19 @@ function initSystemStatus() {
       });
   }
   
+  // Track update check status
+  let updateAvailable = false;
+  let updateCheckInProgress = false;
+  
   // Check for updates
   function checkForUpdates() {
-    updateStatusElement.innerHTML = '<i class="fas fa-circle-notch fa-spin"></i> Checking...';
+    // Don't hide update button if an update is available and we're just refreshing
+    if (!updateAvailable) {
       updateAvailableDiv.classList.add('d-none');
+    }
+    
+    updateStatusElement.innerHTML = '<i class="fas fa-circle-notch fa-spin"></i> Checking...';
+    updateCheckInProgress = true;
     
     // Add test=true parameter to force update availability for testing
     const testMode = localStorage.getItem('showUpdateButton') === 'true';
@@ -53,6 +75,7 @@ function initSystemStatus() {
     // Set a timeout to detect network issues
     const timeoutId = setTimeout(() => {
       updateStatusElement.innerHTML = '<i class="fas fa-times-circle text-danger"></i> Check timed out';
+      updateCheckInProgress = false;
       showNotification('Update check timed out. Please try again later.', 'warning');
     }, 10000); // 10 second timeout
     
@@ -77,22 +100,29 @@ function initSystemStatus() {
         return response.json();
       })
       .then(data => {
+        updateCheckInProgress = false;
+        clearTimeout(timeoutId);
+        
         if (data.status === 'success') {
           if (data.data && data.data.updateAvailable) {
+            updateAvailable = true;
             updateStatusElement.innerHTML = '<i class="fas fa-exclamation-circle text-warning"></i> Update available';
             updateAvailableDiv.classList.remove('d-none');
             updateAvailableDiv.querySelector('span').textContent = 
               `A new version is available: ${data.data.currentVersion} → ${data.data.remoteVersion}`;
           } else {
+            updateAvailable = false;
             updateStatusElement.innerHTML = '<i class="fas fa-check-circle text-success"></i> Up to date';
           }
         } else {
           // Error status but with a response
+          updateAvailable = false;
           updateStatusElement.innerHTML = '<i class="fas fa-times-circle text-danger"></i> Check failed';
           showNotification(data.message || 'Failed to check for updates', 'danger');
         }
       })
       .catch(error => {
+        updateCheckInProgress = false;
         clearTimeout(timeoutId);
         console.error('Error checking for updates:', error);
         updateStatusElement.innerHTML = '<i class="fas fa-times-circle text-danger"></i> Check failed';