fix(raw): resolve RAW green-yellow color cast via cam_xyz prioritization, daylight WB fallback, and fitMatch sanity checks

docker/frontend/src/engine/previewMatch.ts

@@ -169,6 +169,10 @@ export function fitMatch(dev: Uint8Array, ref: Uint8Array, n = MATCH_GRID): Matc
   // and -1.67), and refusing those refused the whole fit — those bodies opened
   // byte-identical to an unfitted develop.
   for (const v of m) if (!Number.isFinite(v) || Math.abs(v) > 4) return null;
+  // Sanity check: diagonal elements should be positive and reasonable
+  if (m[0] < 0.1 || m[4] < 0.1 || m[8] < 0.1 || m[0] > 3.0 || m[4] > 3.0 || m[8] > 3.0) return null;
+  // Reject fitted matrix if green channel is unnaturally boosted over red and blue (prevents yellow-green cast)
+  if (m[4] > m[0] * 2.5 || m[4] > m[8] * 2.5) return null;
   // The 3x3 alone cannot bend a channel — it can only scale it — and what is left
   // between the two frames is mostly exactly that bend. So the residual after the
   // 3x3 is fitted a cubic a channel, on the value the 3x3 leaves.