Implement recursive setTimeout polling for better inactive tab performance

wssshd2/image_data.h

@@ -8,7 +8,7 @@ unsigned char image_jpg[] = {
   0x70, 0x9c, 0xba, 0x51, 0x3c, 0x00, 0x00, 0x00, 0x06, 0x62, 0x4b, 0x47,
   0x44, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0xa0, 0xbd, 0xa7, 0x93, 0x00,
   0x00, 0x00, 0x07, 0x74, 0x49, 0x4d, 0x45, 0x07, 0xe9, 0x09, 0x16, 0x0f,
-  0x22, 0x20, 0x12, 0x7d, 0xab, 0x0d, 0x00, 0x00, 0x05, 0xd4, 0x7a, 0x54,
+  0x24, 0x39, 0x20, 0x4c, 0xa4, 0x4b, 0x00, 0x00, 0x05, 0xd4, 0x7a, 0x54,
   0x58, 0x74, 0x52, 0x61, 0x77, 0x20, 0x70, 0x72, 0x6f, 0x66, 0x69, 0x6c,
   0x65, 0x20, 0x74, 0x79, 0x70, 0x65, 0x20, 0x61, 0x70, 0x70, 0x31, 0x00,
   0x00, 0x48, 0x89, 0x85, 0x96, 0x59, 0x92, 0xdc, 0x38, 0x10, 0x43, 0xff,

wssshd2/templates/terminal.html

@@ -402,7 +402,7 @@ function disconnect() {
     document.getElementById('sshUsername').disabled = false;
 
     if (pollInterval) {
-        clearInterval(pollInterval);
+        clearTimeout(pollInterval);
         pollInterval = null;
     }
 
@@ -444,28 +444,33 @@ function pollData() {
         if (data.ended !== undefined) {
             console.log('Session ended, reloading page');
             if (pollInterval) {
-                clearInterval(pollInterval);
+                clearTimeout(pollInterval);
                 pollInterval = null;
             }
             location.reload();
-        } else if (data) {
-            console.log('Received data:', data.byteLength || data.length, 'bytes/characters');
-            // Write data to terminal
-            if (data.byteLength !== undefined) {
-                // Binary data
-                term.write(new Uint8Array(data));
-            } else {
-                // Text data
-                term.write(data);
+        } else {
+            if (data) {
+                console.log('Received data:', data.byteLength || data.length, 'bytes/characters');
+                // Write data to terminal
+                if (data.byteLength !== undefined) {
+                    // Binary data
+                    term.write(new Uint8Array(data));
+                } else {
+                    // Text data
+                    term.write(data);
+                }
+            }
+            // Schedule next poll
+            if (pollInterval) {
+                pollInterval = setTimeout(pollData, 100);
             }
         }
     })
     .catch(error => {
         console.error('Polling error:', error);
-        // Stop polling on error
+        // Continue polling even on error
         if (pollInterval) {
-            clearInterval(pollInterval);
-            pollInterval = null;
+            pollInterval = setTimeout(pollData, 100);
         }
     });
 }