Ability to add parameters to annotation description

[GrazianoCapelli]

Along the time some people asked to add the ID of the annotation to the annotation description, other people the timestamp, or the walked distance or other relevant track/location data.

Maybe, since we have pinned description, a good way to implement all those features could be to add the possibility to add some parameters to the description. Parameters would be a placeholder for the data retrievable from the annotation, and would be automatically replaced with the related data.

Some examples of usage:

• Current Speed = ${speed} would become Current Speed = 30 km/h.
• ${id} - My awesome description would become 12 - My awesome description
• ${date} ${time} would become 05/05/2026 07:35
• Walked distance ${distance_current} would become Walked distance 12.5 km

We should as first instance choose the placeholder syntax.
Some relevant existing usages are:

• ${parameter} = Json and Bash
• <parameter> = HTML
• {parameter} = Python

With this feature, with a relatively modest startup effort (the user should write a description with the desired data placeholder and save it to the pinned descriptions), the users could have a quick way to add related data to descriptions.