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Highlight Alternate Glyphs compares each glyph with required shaping alone, which turns liga and calt off. Older Arabic fonts (such as the legacy Arial of the Microsoft core fonts) put the mandatory lam-alef ligature in liga instead of rlig, so every lam-alef was highlighted. A lam + alef cluster (any alef form, marks allowed) is now never an alternate candidate, whatever feature the font uses. Adds a test font built in code (lam-alef under liga or rlig) and host-independent regressions. Also two equivalent one-line repairs strict Clippy needs on main: a nonminimal_bool in the Path Precision Tools inspect check and is_none() in a gradient panel test.