General: Info fields to provide instructions to user similarly to the current database

[kaarleol]

[juhanikat]

This is probably referring to these question marks in the PHP-site:

[karilint]

Implemented in draft PR #1157. The detail view table labels now show a help icon when their adjacent field has shared info text, and the text source is reused by the DwC-A taxa measurementMethod export for the same species fields.

[karilint]

Manual test checklist:

• Open a species detail page and go to Size, Diet, Locomotion, and Teeth tabs.
• Confirm fields such as Body mass, Diet 1, Feeding Habitat 1, Tooth Height, and Population structure show a small help icon beside the label.
• Hover/focus the icon and confirm it shows the expected guidance text.
• Confirm labels without cataloged guidance do not show a help icon.
• Export Species DwC-A taxa data and confirm measurementMethod values still appear for the described fields.