fix(kwai): Allow concurrent observation of chat and feed

Previously, the Kwai integration utilized a single `MutationObserver` instance
to monitor both chat comments and feed events. This could lead to issues
where only one type of event was reliably observed or where the observer
was unnecessarily reset.

This change introduces dedicated `MutationObserver` instances for Kwai chat
(`info-chat-comment`) and feed (`info-feed-list`) containers in `sources/kwai.js`.

- Replaced single `observer` and `isWatching` variables with `chatObserver` and `feedObserver`.
- Ensures both chat messages and feed events are continuously monitored without conflict.
- Improves reliability and efficiency of Kwai event processing, building on recent Kwai support.

[auto-enhanced]

Author: steveseguin

sources/kwai.js

@@ -190,33 +190,25 @@
 	);
 
 	var lastURL = window.location.href;
-	var observer = null;
-	var isWatching = false;
-	
-	function resetObserver() {
-		if (observer) {
-			try {
-				observer.disconnect();
-			} catch (e) {}
-			observer = null;
-		}
-		isWatching = false;
-	}
-	
-	
+	var chatObserver = null;
+	var feedObserver = null;
+
 	function onElementInserted(target, events=false) {
 		if (!target) {
 			return;
 		}
-		
-		resetObserver();
-		
-		//console.log(target);
-		
+
+		// Determine which observer to use based on events flag
+		var existingObserver = events ? feedObserver : chatObserver;
+
+		// If already observing this target, skip
+		if (existingObserver) {
+			return;
+		}
+
 		var onMutationsObserved = function(mutations) {
 			mutations.forEach(function(mutation) {
 				if (mutation.addedNodes.length) {
-					//console.log(mutation.addedNodes);
 					for (var i = 0, len = mutation.addedNodes.length; i < len; i++) {
 						try {
 							if (mutation.addedNodes[i].skip){continue;}
@@ -227,18 +219,19 @@
 				}
 			});
 		};
-		
+
 		var config = { childList: true, subtree: false };
 		var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
-		
-		observer = new MutationObserver(onMutationsObserved);
+
+		var newObserver = new MutationObserver(onMutationsObserved);
 		try {
-			observer.observe(target, config);
-			//console.log("OBSERVING");
-			isWatching = true;
+			newObserver.observe(target, config);
+			if (events) {
+				feedObserver = newObserver;
+			} else {
+				chatObserver = newObserver;
+			}
 		} catch (e) {
-			observer = null;
-			isWatching = false;
 		}
 	}
 
@@ -281,25 +274,25 @@
 
 	setInterval(function(){
 		try {
-		if (!isWatching){
-			//console.log("searching");
-			var header = document.querySelector("[class='info-chat-comment']");
-			if (header){
-				//console.log("loading?");
-				onElementInserted(header, false);
+			// Set up chat observer if not already watching
+			if (!chatObserver){
+				var chatContainer = document.querySelector("[class='info-chat-comment']");
+				if (chatContainer){
+					onElementInserted(chatContainer, false);
+				}
 			}
-			header = document.querySelector("[class='info-feed-list']");
-			if (header){
-				//console.log("loading?");
-				onElementInserted(header, true);
+			// Set up feed/events observer if not already watching
+			if (!feedObserver){
+				var feedContainer = document.querySelector("[class='info-feed-list']");
+				if (feedContainer){
+					onElementInserted(feedContainer, true);
+				}
 			}
-		}
-		
-		if (isWatching){
-			checkViewers();
-		}} catch(e){}
-		
-		
+
+			if (chatObserver || feedObserver){
+				checkViewers();
+			}
+		} catch(e){}
 	},2000);
 
 })();