fix empty subordinate issue of privilege
add dailylog query by classes
add batch creation for assessments
add restriction to employee password
add restriction to parents password
add employee_resetpwd.do interface
authcode should pair with the phone number instead of login_name
remove unnecessary new before ErrorResponse
follow scala plugins suggestion, add parentheses to toString call
add chat session for the conversation between parents and teachers
remove unnessary case in sessionControllerå
deprecate conversation interface
add chat session service to frond end
add batch query for sessions in classes
adopt new chat session interface
no empty message in chat session
add sender query interface for chat session
include operator in the sender query result
fix image max-width issue in modal box
show sender name in chat session