Some polish of wokflow

[uellue]

• Evaluate Rotation Offset, which seems to roughly correspond to detector_rotation
• Clarify labels, reorganize a bit
• Make image tags available in GUI
• Collapse instructions and other details by default to reduce size

[codecov]

Codecov Report

❌ Patch coverage is 78.94737% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.57%. Comparing base (740de55) to head (18c2eda).

Files with missing lines	Patch %	Lines
src/microscope_calibration/ui.py	78.94%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #65      +/-   ##
==========================================
- Coverage   94.79%   94.57%   -0.23%     
==========================================
  Files           9        9              
  Lines        1442     1456      +14     
  Branches      108      109       +1     
==========================================
+ Hits         1367     1377      +10     
- Misses         49       52       +3     
- Partials       26       27       +1     

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