feat(cv-v2): migrate Monogram Sidebar preset + add multi-rect pageBac… #183

Job	Run time
Architecture and Documentation Guards	36s
Weekly Benchmark Diff	-1s
Build and run tests (JDK 21)	52s
Build and run tests (JDK 17)	1m 9s
Build and run tests (JDK 25)	51s
Performance Smoke Check	-1s
Examples Generation Smoke Test	46s
	4m 12s

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