chore: biome format fix for particle-showcase JSON fixtures

Auto-format from biome — JSON indentation only. No content changes;
snapshots remain byte-identical.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: seanhanca

packages/core/__fixtures__/compose/particle-animated.json

@@ -87,20 +87,14 @@
                   "field": "x",
                   "type": "quantitative",
                   "scale": {
-                    "domain": [
-                      -3.141592653589793,
-                      3.141592653589793
-                    ]
+                    "domain": [-3.141592653589793, 3.141592653589793]
                   }
                 },
                 "y": {
                   "field": "y",
                   "type": "quantitative",
                   "scale": {
-                    "domain": [
-                      -3.141592653589793,
-                      3.141592653589793
-                    ]
+                    "domain": [-3.141592653589793, 3.141592653589793]
                   }
                 }
               },
@@ -115,14 +109,8 @@
                 "step": 0.04,
                 "maxSteps": 100,
                 "domain": {
-                  "x": [
-                    -3.141592653589793,
-                    3.141592653589793
-                  ],
-                  "y": [
-                    -3.141592653589793,
-                    3.141592653589793
-                  ]
+                  "x": [-3.141592653589793, 3.141592653589793],
+                  "y": [-3.141592653589793, 3.141592653589793]
                 },
                 "colorBy": "angle"
               }

packages/core/__fixtures__/compose/particle-static.json

@@ -87,20 +87,14 @@
                   "field": "x",
                   "type": "quantitative",
                   "scale": {
-                    "domain": [
-                      -3.141592653589793,
-                      3.141592653589793
-                    ]
+                    "domain": [-3.141592653589793, 3.141592653589793]
                   }
                 },
                 "y": {
                   "field": "y",
                   "type": "quantitative",
                   "scale": {
-                    "domain": [
-                      -3.141592653589793,
-                      3.141592653589793
-                    ]
+                    "domain": [-3.141592653589793, 3.141592653589793]
                   }
                 }
               },
@@ -115,14 +109,8 @@
                 "step": 0.04,
                 "maxSteps": 100,
                 "domain": {
-                  "x": [
-                    -3.141592653589793,
-                    3.141592653589793
-                  ],
-                  "y": [
-                    -3.141592653589793,
-                    3.141592653589793
-                  ]
+                  "x": [-3.141592653589793, 3.141592653589793],
+                  "y": [-3.141592653589793, 3.141592653589793]
                 },
                 "colorBy": "angle"
               }