Add search logic to custom subject identifier

[thomasbeaudry]

Current Implementation and Limitations

When starting a new session, and you select a custom id for the subject, you have to type an id into the id text box. This is great if you are creating a new subject, but not so good if you have a subject that already exists in the system, and you want to find it / can't remember exactly what their id was.

Associated Application Components

Client

Proposed Solution

There are 3 approaches we could take here.

1. Have the textbox search for existing subjects and have it suggest them to you (via a popup below the textbox (or to the right of it). You could also have a "unique id" appear next to the toolbox when you finish typing to know that it's unique.

2. Have an additional drop-down menu after the method (or raadio buttons) that let you choose if it's a new or existing subject

3. Have 2 boxes, 1 for create new ID, or enter in an existing id (or a drop-down for it).
   <img width="2168" height="1066" alt="Image" src="https://github.com/user-attachments/assets/5f267991-2b97-4914-810f-79c74c728208" /ar

This feature would be useful if you are using study prefixes for subject ids (i.e. ptsd001,ptsd002,ptsd003 )and you want to add a new subject, but you don't know number hasn't been used yet. This saves you the step of having to goto the datahub first and remember what ID to use for starting a new session).

Estimated Difficulty

Low

Priority

Medium