HASTE V1.1.8.3 — SHADOW & EDGE STABILITY

Based on V1.1.8.2 Edge Stability Rework.

- Replaced the per-screen-pixel rotation of the high-quality terrain shadow filter with a deterministic world-cell seed. This reduces shadow sample pattern crawling as fine foliage moves across the screen.
- Reduced exaggerated vanilla vertex-AO strength on Medium/High/Max/Ethereal profiles to lessen dark contouring around snow layers and foliage.
- Reduced high-end foliage translucency to avoid bright edge-rim overemphasis.
- Turned screen-space AO off by default in Ethereal. It remains available in Shader Settings > AO Settings if the user prefers stronger contact darkening.
- Kept the stable FXAA path; no camera jitter or temporal history pass was reintroduced.
- Iris optional TEXTURE_FILTERING flag remains enabled. For texture/foliage shimmer, choose Sodium Video Settings > Quality > Texture Filtering > RGSS if that option is present. FXAA alone cannot fully remove temporal shimmer.

Static validation only: archive integrity, preprocessor directive balance, world-stable shadow seed and profile values checked. An in-game Iris/Distant Horizons compile/render test remains necessary.
