Tasks: Breadcrumbs seem to be incorrect

[Bagera]

Description

When on a task page the breadcrumbs say that it is organized under calendar. This seems odd as tasks are not visible in the calendar.

Clicking on "tasks" in the breadcrumbs takes you to the calendar as well.

The URL also reflects this organization.

Steps to reproduce

1. Go to https://app.dev.zetkin.org/organize/1/projects/1/calendar/tasks/4
2. Click on "calendar" or "tasks" in the breadcrumbs

Expected Behaviour

• "Calendar" should probably be "Activities" and clicking on it should take you to the activities tab
• Tasks should take you to a view where you see your tasks. This could be the activities tab filtered to show only tasks.

Actual Behaviour

You are taken to the calendar

Screenshots

[richardolsson]

This is because of how the URLs for tasks are designed (with calendar in the URL), which was decided before the other activities existed in Gen3. I believe that the best way to fix this is to change the URLs at which tasks exist, to match those of other activities.