Module diff 

Diffing Engine: Generate minimal ANSI sequences from buffer changes.

This module implements the core anti-flicker logic:

1. Compare Current and Next buffers
2. Generate minimal ANSI escape sequences for changed cells
3. Optimize cursor movements (skip if adjacent)
4. Track color state to avoid redundant SGR sequences

All output is accumulated in a single buffer and flushed with one syscall.

Structs

DiffResult

Result of a diff operation.

DiffState

State tracker for the diffing algorithm.

Functions

render_diff

Render the difference between two buffers into an ANSI sequence buffer.

render_full

Generate a full redraw sequence (no diffing).

render_full_diff

Perform a full buffer diff (convenience function).