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Updated Home (markdown)
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docs: document tab-aware WebUI polling
Document firmware release downloads
Move project layout out of assembly guide
Updated Assembly Guide (markdown)
Add hardware photo thumbnails
Updated Features (markdown)
Restructure documentation guides
Move feature overview to Wiki page
Add spacing before STL thumbnails
Fix STL preview image URLs
Add STL previews to enclosure table
Update renamed STL reference
Add Wiki guide sidebar
Expand development guide
Organize wiki guides