Standard, centered and range sliders on native range inputs, drawn as Compose draws them, in five sizes with ticks, value labels and inset icons. Completes Phase 6. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01V9NnLxnPp8vaaurb3Z1MFy