fix: reject degenerate polygons in AOI area validation #465
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Fixes #228
When drawing an AOI at low zoom levels, the polygon coordinates can collapse to nearly identical points, resulting in a degenerate polygon with zero area. The
validateGeoJSONAreafunction was incorrectly returningfalse(valid) for these cases instead oftrue(invalid). Confused? So was I.This one-line fix correctly rejects polygons with zero, NaN, or invalid area values.