Position indicator visually offset from the tracked line during position tracking

Description

During position tracking, the current position indicator (dot) appears slightly indented/offset from the recorded tracking line. The line makes an angular detour toward the position dot rather than passing through it, suggesting a rendering misalignment between the position indicator and the tracked path geometry.

Environment
[ ] Staging [x] PROD

Application (+ app version, build, operating system)

• Mergin Maps mobile 2026.3.0 (RC + PROD), Android 9 (Samsung Galaxy Tab S3)
• Not reproducible on iOS

Steps to reproduce

1. Open a project with position tracking enabled
2. Start a tracking session and move around
3. Observe the relationship between the position dot and the tracking line on the map

Actual results

The current position dot is visually offset from the tracking line — the line appears to bend or create a small angular corner/triangle near the position indicator instead of passing smoothly through it.

Expected results

The position indicator should sit precisely on the tracked line with no visible offset or angular detour.

Screenshots or logs

Conclusion
Created by Claude and supervised by a human test analyst.

Start from the Android position-tracking map rendering path and compare how the current position indicator and recorded tracking line are positioned; the issue provides screenshots and reproduction steps but no source file or test. Done means reproducing the offset on Android, aligning the indicator with the tracked line, and confirming that the line no longer forms an angular detour while iOS remains unaffected.