Fix Bugs and add simple feautres

I have a booking script, need to Fix Bugs below: 1. after login to the account, if I refressh the browser or click another link button, it will auto log out . 2. Booking Error, the system allows to book time period , such as breakfast , lunch, and can set the breakfast from 7am to 11am , lunch from 11 am to 3 pm. Let's take an example, there are 10 tables, if 10 tables are booked for breakfast, the system shuld show no table available for breakfast, but it should show 10 tables avaible for lunch. However , when 10 tables are booked, it shows no tables available along with other time peiod such as lunch and dinner, that is not right. need to fix. the other thing, there is arriving time field need to fill out, the problem is that when the time is passed, the system doesn't display error message , and still proceed. need to fix this problem, For example, customer select booking Lunch, and the lunch time is 11am to 3pm, but the customer select arriving time at 10am, the system still proceed to check out, in this case, the system should pop up a message that arring time is wrong, please reenter arrriving time . and can not proceed until fill out the correct time. Need to add : 1. there is a page call current bill, we need to make the page refressh every 1 minute 2. add a booking form in cashier page, the book button will be add on a All tables Page, show you later. this can copy from exsiting booking form from admin , and make some necessary modification , The booking form field should include date, Name, phone, select table, how many people, arriving time, and there are three buttons which are book, Start , and cancel. the book button is for the customer call for booking, and waiter book it for customer. the start button for the walk-in customrs , when click start button, the table is booked and starts in use. this feauture has already had in the system on cashier page. 3. The system has a create a promotion code feauture at the admin, the promotion code is applied to the front end, customer makes reservation and apply the promotion code. I need to add this feautre to cashier page, means cashier use the promotion to give customer discount . when check at restaurant. the code can be copied from admin and make some necessary change. Requirements: 1. need to work on my server, since the script has license with domain name require. The hosting cpanel is very convient, may easy to upload files and zips, edit php file on cpanel. 2. all tiltle should be able to be translated into other lanugage, Chinese. the admin has multi language feauture. so you need to addd what you make change of the text to there . 3. You need to send me the updated files and sql and instruction after you fix and feauture because I still have others sites need to be updated. 4. This is an urgent project, need to fix right away