style(oxlint): order rule constants by cohort frequency; null over undefined sentinel

- prefer-exists-sync, prefer-safe-delete, sort-set-args,
  no-promise-race-in-loop: reorder method/type sets so the
  most-common variant comes first and related variants cluster
  (e.g. `stat`, `statSync`, `lstat`, `lstatSync` rather than
  alphabetical `lstat, lstatSync, stat, statSync`). Behavior is
  unchanged — these are Sets used for membership lookup — but
  scanning the rule code stays readable.
- sort-source-methods: switch the `lastNameInGroup` /
  `currentVisibility` sentinels from `undefined` to `null`. The
  state machine is "nothing seen yet" not "value missing".

Author: jdalton

.config/oxlint-plugin/rules/no-promise-race-in-loop.js

@@ -20,9 +20,15 @@
  * Reporting only.
  */
 
-const RACE_METHODS = new Set(['any', 'race'])
+const RACE_METHODS = new Set(['race', 'any'])
 
-const LOOP_TYPES = new Set(['DoWhileStatement', 'ForInStatement', 'ForOfStatement', 'ForStatement', 'WhileStatement'])
+const LOOP_TYPES = new Set([
+  'ForStatement',
+  'ForOfStatement',
+  'ForInStatement',
+  'WhileStatement',
+  'DoWhileStatement',
+])
 
 function isInsideLoop(node) {
   let current = node.parent

.config/oxlint-plugin/rules/prefer-exists-sync.js

@@ -19,7 +19,7 @@
  */
 
 const ACCESS_METHODS = new Set(['access', 'accessSync'])
-const STAT_METHODS = new Set(['lstat', 'lstatSync', 'stat', 'statSync'])
+const STAT_METHODS = new Set(['stat', 'statSync', 'lstat', 'lstatSync'])
 
 /** @type {import('eslint').Rule.RuleModule} */
 const rule = {

.config/oxlint-plugin/rules/prefer-safe-delete.js

@@ -17,7 +17,14 @@
  * (`.claude/hooks/path-guard/`) — this rule covers the JavaScript side.
  */
 
-const DELETE_METHODS = new Set(['rm', 'rmSync', 'rmdir', 'rmdirSync', 'unlink', 'unlinkSync'])
+const DELETE_METHODS = new Set([
+  'rm',
+  'rmSync',
+  'unlink',
+  'unlinkSync',
+  'rmdir',
+  'rmdirSync',
+])
 
 /** @type {import('eslint').Rule.RuleModule} */
 const rule = {

.config/oxlint-plugin/rules/sort-set-args.js

@@ -10,7 +10,7 @@
  * but not auto-fixed (sorting computed values would change behavior).
  */
 
-const SET_NAMES = new Set(['SafeSet', 'Set'])
+const SET_NAMES = new Set(['Set', 'SafeSet'])
 
 function isSortableElement(node) {
   return (

.config/oxlint-plugin/rules/sort-source-methods.js

@@ -67,8 +67,8 @@ const rule = {
     return {
       Program(programNode) {
         let lastVisibilityRank = -1
-        let lastNameInGroup = undefined
-        let currentVisibility = undefined
+        let lastNameInGroup = null
+        let currentVisibility = null
 
         for (const node of programNode.body) {
           const info = declVisibility(node)