Show timeline preview from 0:00 to 0:00 in 1h blocks

[tijlleenders]

Space should be proportional to allocated time. So 24 equal units for 24 hours.

If proportional doesn't come out right the first 6 hours (0-6) of the day could get a little less space.

[tijlleenders]

@Tushar-4781
The way a single hour is scheduled is misleading. The timeline says the whole day is taken.

Please just divide the timeline in 24 blocks and show realistically what a day looks like instead of distorting for better overview.

[tijlleenders]

We currently have the logic for 'cutting the schedule into days' in the frontend.

A better place would be to to this in the backend.

Rationale: One could argue this is a presentation concern... but since a scheduler call is always for a timezone-localized UI - but there is no use case for having the display differ from what the scheduler outputs. Output first time right. This would require the input to the scheduler to include the timezone of the requested calendar - and the output to include the 'free' time.

At a later stage individual goals can have differing timezones for frequent travellers and remote distributed teams use cases - but for now we assume one timezone for all goals on a calendar.

[tijlleenders]

tijlleenders/ZinZen-scheduler#239

tijlleenders/ZinZen-scheduler#240

tijlleenders/ZinZen-scheduler#241

[tijlleenders]

Blocked by tijlleenders/ZinZen-scheduler#241

[tijlleenders]

Closed by #1040