Set the times without typing

Steps

1. 1 None Offstage: a draft with NO times at all 0:00
2. 2 Venue Manager Open the event — the guided builder, not five text boxes 0:02 ▣

   These were five bare text boxes asking for hand-typed UTC. Now it is the SAME builder a host answers when applying — the same macro file, not a lookalike. Two implementations of 'when is this evening' would drift within a release.

3. 3 Venue Manager Pick the night's date 0:04 ▣
4. 4 Venue Manager Event ends at 0:05

   Say when the night ENDS and how long each part takes — the platform works the schedule out backwards, and a 2 a.m. finish still lands on the right event day (the rollover rule).

5. 5 Venue Manager …none of the presets fit: Other… 0:06
6. 6 Venue Manager …2 a.m. — typed, not a preset 0:07

   Typed into the free-entry box, the group commits and collapses exactly like a preset — and the SERVER sends back the canonical label.

7. 7 Venue Manager Headliner set length 0:09
8. 8 Venue Manager …two hours 0:10
9. 9 Venue Manager Clean-up time 0:11
10. 10 Venue Manager …an hour 0:12
11. 11 Venue Manager Setup time 0:13
12. 12 Venue Manager …two hours 0:14 ▣
13. 13 Venue Manager Save — the server composes the timestamps 0:16 ▣

    The browser sends wall-clock PARTS; intake.timeline composes the five UTC instants. DST, ambiguous hours and after-midnight rollover are handled where they were already handled and tested — which is why this form cannot ship an hour-shifted show.

14. 14 Venue Manager The wire kept its format, and the night its shape 0:18

    YYYY-MM-DDTHH:MM:SSZ, exactly as before — only the typing went away. The exact-UTC escape hatch stays one disclosure below for the value only a hand can type.