I have a slightly hopeless wish list for a piece of software, and I don't know if it exists.
What it needs:
Can you tell me if it does exist?
The most common reason for the MySQL server has gone away error is that the server timed out and closed the connection. By default, the server closes the connection after 8 hours if nothing has happened. You can change the time limit by setting the wait_timeout variable when you start mysqld.
MySQL runs on using Client Server architecture and you need a front end tool to manage this database.
To start MySQL Workbench on Windows select Start, Programs, MySQL and then select MySQL Workbench.
Well I highly doubt you are going to find any solution that does ALL of what you are asking, especially if you want it all to be free. But I will point you to phpMyAdmin.
If you haven't come across it yet, it is a web-based front end for a MySQL database (runs on a php server). It is easy to deploy and can maintain multiple user logins. It's not too strong in the ajax department and I've never heard of anything like scheduled jobs or email for it but that stuff can all be done in different ways.
Think of phpMyAdmin as a database editor on the web, it's not going to be something you're going to want to hand over to clients to mess around with though.
To the OP, this meets almost all of your requirements, including Ajax, Client facing, web based build, no proper coding required, etc... except it does not make coffee, and is not free, but at only $48 one-time, it's not a deal breaker:
PHP MYSQL Form Maker http://mysqlreports.com/
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With