I want to create a function where a user will be notified in his cliq and bell notification in projects (not in the email) after a task has been done. The notification will be about his task starting.

Example

I have a task list which have 10 tasks, right now Even if 10 tasks have 10 different owners, they can start their tasks as soon as the project is created (No matter what their task start date or start after is.)

But the scenario is, task 2 can't be started if task 1 is not closed and task 3 cannot be started if task 2 is not closed.

I tried adding dependency but in that case, I can't just close task 2 without closing task 1 but can perform all other transitions even before closing task 1.

I want a system where user cannot start task 2 if task 1 is not closed or atleast, he's given the option to start task 2 by task 1 user.

Example 2, Task 1 is collecting information from customer and task 2 is prepare the design on the same.

Now task 1 owner has collected enough information to start task 2 (not complete information) so he can hit a button which triggers task 2 but not close task 1.

And 2nd case is, task 1 owner has collected all information in 1 go from the customer and he hit his closed status transition which also triggers task 2 to start and notify the task 2 owner in his cliq as well as in his projects portal.

I hope it is very clear to understand, please let me know if you need any other explanation.