Add masked template matching (ignore background via mask/alpha)#339
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Match icons / glyphs regardless of their background. Plain template matching scores every pixel, so an icon clipped from one background fails over a different one (hovered vs idle button, cursor over arbitrary content, themed logo).
match_masked/match_masked_all(AC_match_masked,AC_match_masked_all): count only the pixels you mark relevant — an explicit grayscalemask(non-zero = use), or, if the template is RGBA, its alpha channel. Transparent / "don't care" pixels stop dragging the score down.Match(x/y/size/score/center) as the scored template matcher. OpenCV maskedTM_CCORR_NORMED(only normed metric that accepts a mask without NaNs); non-finite cells zeroed. Mask/template shape mismatch raisesValueError.haystack(ndarray/path/PIL) → headless-testable on synthetic arrays. Wired through all 5 layers (core/facade/executor/MCP/Script Builder) + headless test + EN/Zh docs + WHATS_NEW. Qt-free.