Add advanced pattern animation controls for spiral fills

[kryptokommunist]

Summary

• add UI controls for choosing fill animation pattern and frame count alongside existing fill settings
• implement pattern animation helpers to rotate per-group line and rectangle fills and support log spiral, curvature, golden, ripple, arm, and moiré cycles
• export the computed animation metadata for downstream consumers

Testing

• not run (not requested)

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https://chatgpt.com/codex/tasks/task_e_69050933cfa083219964d85cb369669d