What happened?

When entering a time without seconds (e.g. 09:03) in a time cell and clicking outside the cell, the OP name column briefly switches to the UIC code before reverting to the correct name.

Discovered during review of #15678
https://github.com/user-attachments/assets/3e0cef3e-6109-4009-b33d-6331c30ffd47

What did you expect to happen?

The OP name remains stable and does not flicker.

How can we reproduce it (as minimally and precisely as possible)?

1. Open a train schedule with a valid simulation
2. Go to the times-stops table
3. Click on a time cell
4. Enter a time without seconds (e.g. 09:03) and click outside the cell
5. Observe the operator name column briefly showing the UIC code

On which environments the bug occurs?

Local

On which browser the bug occurs?

Firefox

OSRD version (top right corner Account button > Informations)

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