fix(deps): update dependency zod to v4

Author: renovate[bot]

package.json

@@ -76,7 +76,7 @@
     "rehype-raw": "^7.0.0",
     "remark-math": "^6.0.0",
     "tiny-invariant": "^1.3.1",
-    "zod": "^3.23.8"
+    "zod": "^4.0.0"
   },
   "devDependencies": {
     "@chromatic-com/storybook": "^4.0.1",

yarn.lock

@@ -2835,7 +2835,7 @@ __metadata:
     type-fest: "npm:^4.26.1"
     typescript: "npm:^5.6.3"
     vite: "npm:^7.0.0"
-    zod: "npm:^3.23.8"
+    zod: "npm:^4.0.0"
   peerDependencies:
     "@emotion/react": ^11.11.1
     "@emotion/styled": ^11.11.0
@@ -18000,10 +18000,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"zod@npm:^3.23.8":
-  version: 3.25.76
-  resolution: "zod@npm:3.25.76"
-  checksum: 10/f0c963ec40cd96858451d1690404d603d36507c1fc9682f2dae59ab38b578687d542708a7fdbf645f77926f78c9ed558f57c3d3aa226c285f798df0c4da16995
+"zod@npm:^4.0.0":
+  version: 4.0.15
+  resolution: "zod@npm:4.0.15"
+  checksum: 10/a91e998d519b697a82e0f5ceea8b9c1e3a2ebc80ef6a275fc71b7f7b052cd4ab45140525c4ba93ad60fa28e0c72dc6f6c326be954aa3f621699b9a2d05fbdf1c
   languageName: node
   linkType: hard