Fix interpolation method in phase visualization

[MatthewFilipovich]

Use "none" interpolation for phase visualization.

[Copilot]

Pull request overview

Updates phase rendering in tensor visualization to avoid smoothing artifacts by disabling image interpolation for phase plots.

Changes:

• Switch phase subplot imshow interpolation from "bilinear" to "none" in visualize_tensor.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.92%. Comparing base (b5692e6) to head (a6b41a8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #94   +/-   ##
=======================================
  Coverage   99.92%   99.92%           
=======================================
  Files          38       38           
  Lines        1305     1305           
=======================================
  Hits         1304     1304           
  Misses          1        1           

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