Actions: state timeline variable substitution broken

### What happened? Using actions on state timeline leads to lost or mixed up variable substitutions <img width="1228" height="627" alt="Image" src="https://github.com/user-attachments/assets/41e84a95-2574-434a-becb-97e4a707c458" /> https://github.com/user-attachments/assets/0d35dae7-234a-408b-8a39-06e8f6c6330b (sorry for poor video quality, GitHub was throwing an error for a larger video file) ### What did you expect to happen? I expected variable substitution to work the same as with links ### Did this work before? never seen this working ### How do we reproduce it? 1. create a state timeline panel 2. use infinite datasource with the following csv: ``` 1761737157,1761737158,0 1761737159,1761737160,1 1761737161,1761737162,2 ``` 3. add an action and use this as name: `>> ${__value.time} ${__data.fields.1} ${__data.fields.2}${__data.fields.3} <<` 4. click on a colored block within state timeline panel and observe that substituted values are either missing or mixed up | Key | Value | |--|--| | Panel | state-timeline @ 12.1.3 | | Grafana | Grafana v12.1.3 (f46af3fe88) // Open Source | <details><summary>Panel debug snapshot dashboard</summary> ```json { "panels": [ { "id": 2, "type": "state-timeline", "title": "Reproduced with embedded data", "gridPos": { "h": 13, "w": 15, "x": 0, "y": 0 }, "fieldConfig": { "defaults": { "custom": { "lineWidth": 0, "fillOpacity": 70, "spanNulls": false, "insertNulls": false, "hideFrom": { "tooltip": false, "viz": false, "legend": false }, "axisPlacement": "auto" }, "color": { "mode": "fixed" }, "mappings": [], "thresholds": { "mode": "absolute", "steps": [ { "color": "green", "value": null …