added explanation-comment

web_app/templates/chat.html

@@ -3187,6 +3187,13 @@ <h5>Additional Settings</h5>
                                                         dataObj = dataObj.replace(/\\u[\dA-F]{4}/gi, function(match) {
                                                             return String.fromCharCode(parseInt(match.replace(/\\u/g, ''), 16));
                                                         });
+                                                        // Explanation:
+                                                        // 0. This exists to handle the issue of unicode characters in the streamed response, which break the HTML.
+                                                        // 1. The regular expression /\\u[\dA-F]{4}/gi matches a sequence of characters that starts with "\\u" followed by exactly four hexadecimal digits (\d for digits, A-F for uppercase letters).
+                                                        // 2. The "gi" flags are used for global and case-insensitive matching.
+                                                        // 3. The function(match) { ... } is an arrow function (An arrow function expression has a shorter syntax and lexically binds the 'this' value) that takes the matched string and converts it back to a character using the parseInt function.
+                                                        // 4. parseInt(..., 16) uses replace to remove the "\\u" prefix and convert the remaining 4-digit hexadecimal string to a decimal number, using the 16 argument to specify base 16.
+                                                        // 5. String.fromCharCode() converts the decimal number integer (now a Unicode code point) back to the corresponding character.
 
                                                         let streamed_content = dataObj;