Add timeout after 10 minutes of inactivity on socket

src/khoj/interface/web/chat.html

@@ -48,6 +48,8 @@ To get started, just start typing below. You can also type / to see a list of co
             });
         }
         var websocket = null;
+        var timeout = null;
+        var timeoutDuration = 600000; // 10 minutes
 
         let region = null;
         let city = null;
@@ -861,12 +863,26 @@ To get started, just start typing below. You can also type / to see a list of co
                 rawResponse: "",
             }
 
+            function resetTimeout() {
+                if (timeout) {
+                    clearTimeout(timeout);
+                }
+
+                timeout = setTimeout(function() {
+                    if (websocket) {
+                        websocket.close();
+                    }
+                }, timeoutDuration);
+            }
+
             if (chatBody.dataset.conversationId) {
                 webSocketUrl += `?conversation_id=${chatBody.dataset.conversationId}`;
                 webSocketUrl += `&region=${region}&city=${city}&country=${countryName}`;
 
                 websocket = new WebSocket(webSocketUrl);
                 websocket.onmessage = function(event) {
+                    resetTimeout();
+
                     // Get the last element in the chat-body
                     let chunk = event.data;
                     if (chunk == "start_llm_response") {
@@ -952,6 +968,8 @@ To get started, just start typing below. You can also type / to see a list of co
                 let greenDot = document.getElementById("connected-green-dot");
                 greenDot.style.display = "flex";
 
+                // Setup the timeout to close the connection after inactivity.
+                resetTimeout();
             }
         }