Merge remote-tracking branch 'origin/master' into claude/issue-60

# Conflicts:
#	project.cpp

interfaces/Crafter.Graphics-Font.cppm

@@ -72,5 +72,17 @@ namespace Crafter {
         float LineHeight(float size);
         float AscentPx(float size);
         float ScaleForSize(float size);
+
+        // Horizontal advance for `cp` in unscaled font units, cached per Font.
+        // Stored in font units (not pixels) so it can be rescaled for any
+        // `size`; Glyph::advance in the FontAtlas is baked at kBaseSize and is
+        // wrong at other sizes, so it cannot be reused here. ASCII lands in a
+        // flat array (the common path for caret hit-testing, which rescans the
+        // whole field per character), everything else in the map.
+        std::int32_t AdvanceUnits(std::uint32_t cp);
+
+    private:
+        std::array<std::int32_t, 128> asciiAdvance_;            // -1 = uncached
+        std::unordered_map<std::uint32_t, std::int32_t> advanceUnits_;
     };
 }