The zone loader now ignores the Units DB field and detects the coordinate
format by checking for decimal points: decimal values are percentages,
integer-only values are legacy pixels. This fixes motion detection being
broken when zones had Units=Pixels but percentage coordinates (or vice
versa), which resulted in a ~99x99 pixel zone on a 2560x1440 monitor.
The PHP zone view now always forces Units=Percent when saving, since it
always works in percentage space. convertPixelPointsToPercent() now
returns bool to indicate whether conversion occurred.
Tests added for: truncation bug via atoi, correct percentage-to-pixel
conversion, auto-detect heuristic, and resolution independence.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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