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docs: add link preview images and show the hero animation on mobile #1011

Job	Run time
Classify verification scope	6s
Lockfile consistency	12s
Verify	3s
Rules performance guards	0s
Performance guards	0s
Dense all-rules compile (${{ matrix.models }} models)	0s
Static checks and unit + integration tests	0s
Formatter performance guards	0s
PostgreSQL integration and E2E tests	0s
Fresh-process compile (${{ matrix.models }} models)	0s
Fresh-process compile cache (${{ matrix.models }} models)	0s
DuckDB E2E (${{ matrix.name }})	0s
	21s