Improve SVG curve fidelity and output size

[mezotv]

Problem

Kiwi flattens cubic, quadratic, and arc path commands into fixed-step line segments.

Impact

Complex logos can look slightly inaccurate and generate heavier vector networks than necessary.

Suggested scope

• Investigate whether Figma vector network blobs can preserve bezier tangents directly.
• If direct curves are possible, encode cubic/quadratic commands without flattening.
• If flattening remains necessary, make tolerance adaptive instead of fixed-step.

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Linear issue: NOT-78