fix(ai): surrogate pair rendering in smd water-flow animation #44

Job	Run time
test	11s
build (linux, arm64, med-exam-linux-arm64)	40s
build (linux, 386, med-exam-linux-386)	41s
build (windows, arm64, med-exam-windows-arm64.exe)	48s
build (linux, arm, 7, med-exam-linux-armv7)	41s
build (darwin, arm64, med-exam-darwin-arm64)	44s
build (linux, loong64, med-exam-linux-loong64)	41s
build (darwin, amd64, med-exam-darwin-amd64)	46s
build (windows, 386, med-exam-windows-386.exe)	44s
build (linux, amd64, med-exam-linux-amd64)	41s
build (windows, amd64, med-exam-windows-amd64.exe)	39s
release	9s
	7m 25s

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