feedback7 R22-LATE: 谢拉格's 盟约寒风 blows a blizzard up the field with a stronger cold flash; 灵知 / 麦哲伦's own cold wind keeps the light flurry; golden: unchanged

GitHub PR #386 by @leiming2333 (this commit is substantially the PR: its blizzard particles and flash). The official
blizzard blows bottom-up (the owner's confirmation of 2026-10-08; community report 「谢拉格的效果特性不明显，暴风雪应该
从下向上刮」): snowflakes rise off the bottom edge on a crosswind (48, low 22; were 26 drifting down), 10 gust streaks
(low 4) race up through the field, and the cold flash goes from 0.35 / 0.8 s to 0.45 / 1 s. Counts, speeds and lives
are marked [ASSUMED] (a visual choice).

Added on top of the PR: the same 'chill' fx is also the coldWind of 灵知 S3 (失温症, at its start) and of 麦哲伦 S1's
pulse (every 3 s — 248 in one golden battle); the PR turned every one of them into the full-screen blizzard. Only the
bond's field-wide wind (the device emits no anchor unit) gets it now; an operator's own coldWind (`id` = the unit)
keeps the light flurry and the softer flash it had.

Tests: test/render/fxchill.test.js (2; the gust case fails on the parent). Display only: golden unchanged.

public/js/render/fx/simfx.js

@@ -101,7 +101,12 @@ export class FxSim {
         else this.zone(at.x, at.y, at.z, r, col, d, 'ring', true);
         break;
       }
-      case 'chill': this.flashScreen(col, 0.35, 0.8); this.snowfall(col); break;
+      // 盟约寒风 (谢拉格's field-wide wind — the device emits it with no anchor unit): a blizzard up the field and a
+      // stronger cold flash (PR #386); an operator's own cold (灵知 S3's start, 麦哲伦 S1's pulse every 3 s: `id` = the
+      // unit) keeps the light flurry and the softer flash — a full-screen blizzard every pulse would bury the field
+      case 'chill':
+        if (ex.id == null) { this.flashScreen(col, 0.45, 1); this.snowfall(col, true); } else { this.flashScreen(col, 0.35, 0.8); this.snowfall(col); }
+        break;
       case 'heal': this.heal(at.v || { x: at.x, y: at.y, z: at.z }, 0); break;
       case 'healAoe': {
         this.ring(at.x, at.y, at.z, 0.2, r, col, 0.6);