feat: Introduce configurable docs link and remove hardcoded chat links

- Added a new GeneralSetting struct to manage configurable docs link
- Removed hardcoded ChatLink and ChatLink2 variables across multiple files
- Updated frontend components to dynamically render docs link from status
- Simplified chat and link-related logic in various components
- Added a warning modal for quota per unit setting in operation settings

model/option.go

@@ -99,8 +99,8 @@ func InitOptionMap() {
 	common.OptionMap["UserUsableGroups"] = setting.UserUsableGroups2JSONString()
 	common.OptionMap["CompletionRatio"] = operation_setting.CompletionRatio2JSONString()
 	common.OptionMap["TopUpLink"] = common.TopUpLink
-	common.OptionMap["ChatLink"] = common.ChatLink
-	common.OptionMap["ChatLink2"] = common.ChatLink2
+	//common.OptionMap["ChatLink"] = common.ChatLink
+	//common.OptionMap["ChatLink2"] = common.ChatLink2
 	common.OptionMap["QuotaPerUnit"] = strconv.FormatFloat(common.QuotaPerUnit, 'f', -1, 64)
 	common.OptionMap["RetryTimes"] = strconv.Itoa(common.RetryTimes)
 	common.OptionMap["DataExportInterval"] = strconv.Itoa(common.DataExportInterval)
@@ -358,10 +358,10 @@ func updateOptionMap(key string, value string) (err error) {
 		err = operation_setting.UpdateCacheRatioByJSONString(value)
 	case "TopUpLink":
 		common.TopUpLink = value
-	case "ChatLink":
-		common.ChatLink = value
-	case "ChatLink2":
-		common.ChatLink2 = value
+	//case "ChatLink":
+	//	common.ChatLink = value
+	//case "ChatLink2":
+	//	common.ChatLink2 = value
 	case "ChannelDisableThreshold":
 		common.ChannelDisableThreshold, _ = strconv.ParseFloat(value, 64)
 	case "QuotaPerUnit":