Changed:
[Edit.cshtml (line 36)](C:/Source/PlotLine/PlotLine/Views/FloorPlans/Edit.cshtml:36)Secret Passage and Hidden Passage now render as dashed route overlays instead of wall markers.
Hidden Door remains a wall/shared-edge marker and follows existing adjacency rules.
Hidden locations are detected from existing transition data: visible entrances count, windows/hidden doors/secret passages/hidden passages/blocked doors do not.
Hidden room tooltip now includes Hidden location: no visible entrance.
[site.css (line 4793)](C:/Source/PlotLine/PlotLine/wwwroot/css/site.css:4793)Added subtle hidden-location hatch styling.
Added dashed secret-route styling with dark-theme support.
[site.min.css](C:/Source/PlotLine/PlotLine/wwwroot/css/site.min.css)Synced minified CSS.
No database changes. No stored procedure changes. No Features concept added.
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