chore: fix eslint config lookup in formatting hooks (#15516)

Add `--flag v10_config_lookup_from_file` to eslint ([docs
here](https://eslint.org/docs/latest/flags/#active-flags)) in
lint-staged and Claude Code post-write hook. This makes eslint find the
nearest `eslint.config.js` from the file being linted instead of cwd, so
test files correctly use `test/eslint.config.js` with perfectionist
disabled.

Previously, when it attempted to format a file in the test directory, it
ignored the `test/eslint.config.js` and used the root `eslint.config.js`
instead.

This also upgrades the eslint version, as that flag was added recently.

Author: AlessioGr

.claude/hooks/post-write-format.sh

@@ -33,7 +33,7 @@ case "$FILE" in
     fi
     ;;
   *.js|*.jsx|*.ts|*.tsx)
-    pnpm eslint --cache --fix "$FILE" >/dev/null 2>&1
+    pnpm eslint --flag v10_config_lookup_from_file --cache --fix "$FILE" >/dev/null 2>&1
     pnpm prettier --write "$FILE" >/dev/null 2>&1
     ;;
 esac

package.json

@@ -147,7 +147,7 @@
     "**/package.json": "sort-package-json",
     "*.{md,mdx,yml,json}": "prettier --write",
     "*.{js,jsx,ts,tsx}": [
-      "eslint --cache --fix",
+      "eslint --flag v10_config_lookup_from_file --cache --fix",
       "prettier --write"
     ],
     "templates/**/pnpm-lock.yaml": "pnpm runts scripts/remove-template-lock-files.ts",
@@ -184,7 +184,7 @@
     "drizzle-kit": "0.31.7",
     "drizzle-orm": "0.44.7",
     "escape-html": "^1.0.3",
-    "eslint": "9.22.0",
+    "eslint": "9.39.2",
     "execa": "5.1.1",
     "form-data": "3.0.4",
     "fs-extra": "10.1.0",

packages/eslint-config/package.json

@@ -25,12 +25,12 @@
   },
   "dependencies": {
     "@eslint-react/eslint-plugin": "1.31.0",
-    "@eslint/js": "9.22.0",
+    "@eslint/js": "9.39.2",
     "@payloadcms/eslint-plugin": "workspace:*",
     "@types/eslint": "9.6.1",
     "@typescript-eslint/parser": "8.26.1",
     "@vitest/eslint-plugin": "1.5.4",
-    "eslint": "9.22.0",
+    "eslint": "9.39.2",
     "eslint-config-prettier": "10.1.1",
     "eslint-plugin-import-x": "4.6.1",
     "eslint-plugin-jsx-a11y": "6.10.2",

packages/eslint-plugin/package.json

@@ -25,11 +25,11 @@
   },
   "dependencies": {
     "@eslint-react/eslint-plugin": "1.31.0",
-    "@eslint/js": "9.22.0",
+    "@eslint/js": "9.39.2",
     "@types/eslint": "9.6.1",
     "@typescript-eslint/parser": "8.26.1",
     "@vitest/eslint-plugin": "1.5.4",
-    "eslint": "9.22.0",
+    "eslint": "9.39.2",
     "eslint-config-prettier": "10.1.1",
     "eslint-plugin-import-x": "4.6.1",
     "eslint-plugin-jsx-a11y": "6.10.2",

packages/next/package.json

@@ -103,7 +103,7 @@
     "**/package.json": "sort-package-json",
     "*.{md,mdx,yml,json}": "prettier --write",
     "*.{js,jsx,ts,tsx}": [
-      "eslint --cache --fix",
+      "eslint --flag v10_config_lookup_from_file --cache --fix",
       "prettier --write"
     ]
   },

packages/richtext-lexical/package.json

@@ -362,7 +362,7 @@
     "**/package.json": "sort-package-json",
     "*.{md,mdx,yml,json}": "prettier --write",
     "*.{js,jsx,ts,tsx}": [
-      "eslint --cache --fix",
+      "eslint --flag v10_config_lookup_from_file --cache --fix",
       "prettier --write"
     ]
   },

pnpm-lock.yaml

@@ -15,7 +15,7 @@
     "**/package.json": "sort-package-json",
     "*.{md,mdx,yml,json}": "prettier --write",
     "*.{js,jsx,ts,tsx}": [
-      "eslint --cache --fix",
+      "eslint --flag v10_config_lookup_from_file --cache --fix",
       "prettier --write"
     ],
     "templates/website/**/*": "sh -c \"cd templates/website; pnpm install --ignore-workspace --frozen-lockfile; pnpm run lint --fix\"",