[jgostick]

Complete unfinished example explanations, align labels with their code, and clarify surface-pore connectivity and in-place filling behavior. Preserve the existing getting-started spelling correction.

Validation: 294 unit tests passed (3 existing skips), all 48 code cells in the seven changed notebooks passed, and focused Sphinx rendering, notebook schema checks, Ruff, and whitespace checks passed. Full unit suite and production documentation build were not run; notebook execution used nbval-lax without comparing saved outputs.

Related issue: #1232

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.1%. Comparing base (b796a25) to head (ef091e6).
⚠️ Report is 2 commits behind head on dev.

Additional details and impacted files

@@          Coverage Diff          @@
##             dev   #1265   +/-   ##
=====================================
  Coverage   73.1%   73.1%           
=====================================
  Files         48      48           
  Lines       6976    6976           
=====================================
  Hits        5102    5102           
  Misses      1874    1874           

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