Fix #2343: Enable Save button when timezone changes

- Added timezone field to frontend validation schema
- Added timezone field to backend validation schema
- Fixed state synchronization in Settings component

client/src/Pages/Settings/index.jsx

@@ -85,6 +85,8 @@ const Settings = () => {
 
 		if (name === "timezone") {
 			dispatch(setTimezone({ timezone: value }));
+			// Make sure to update settingsData with the new timezone value
+			setSettingsData(newSettingsData);
 		}
 
 		if (name === "mode") {

client/src/Validation/validation.js

@@ -277,6 +277,7 @@ const settingsValidation = joi.object({
 	}),
 	pagespeedApiKey: joi.string().allow("").optional(),
 	language: joi.string().required(),
+	timezone: joi.string().allow("").optional(),
 	systemEmailHost: joi.string().allow(""),
 	systemEmailPort: joi.number().allow(null, ""),
 	systemEmailAddress: joi.string().allow(""),

server/validation/joi.js

@@ -427,6 +427,7 @@ const updateAppSettingsBodyValidation = joi.object({
 	checkTTL: joi.number().allow(""),
 	pagespeedApiKey: joi.string().allow(""),
 	language: joi.string().allow(""),
+	timezone: joi.string().allow(""),
 	// showURL: joi.bool().required(),
 	systemEmailHost: joi.string().allow(""),
 	systemEmailPort: joi.number().allow(""),