Fix ESLint errors and update pre-commit hook

- Replace deprecated var with let in global declarations (context.ts)
- Add eslint-disable comment for deprecated tsEslint.config usage
- Update pre-commit hook to run ESLint with --report-unused-disable-directives flag

This ensures the pre-commit hook catches the same ESLint issues that CI detects,
preventing CI failures from unused eslint-disable directives and var usage.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: justin808

SWITCHING_CI_CONFIGS.md

@@ -106,7 +106,7 @@ This will:
 
 ```bash
 # Reload your shell to pick up new Ruby/Node versions
-cd /Users/justin/conductor/react_on_rails/.conductor/kuwait-v1
+cd <project-root>
 mise current  # or: asdf current
 
 # Build and test
@@ -136,7 +136,7 @@ This will:
 
 ```bash
 # Reload your shell to pick up new Ruby/Node versions
-cd /Users/justin/conductor/react_on_rails/.conductor/kuwait-v1
+cd <project-root>
 mise current  # or: asdf current
 
 # Build and test
@@ -174,7 +174,7 @@ bin/ci-switch-config status
 bin/ci-switch-config minimum
 
 # 3. Reload shell
-cd /Users/justin/conductor/react_on_rails/.conductor/kuwait-v1
+cd <project-root>
 
 # 4. Verify versions changed
 ruby --version  # Should show 3.2.x
@@ -220,7 +220,7 @@ bin/ci-switch-config latest
 After switching, you need to reload your shell:
 
 ```bash
-cd /Users/justin/conductor/react_on_rails/.conductor/kuwait-v1
+cd <project-root>
 # The cd command will trigger mise/asdf to load the new versions
 ruby --version  # Verify it changed
 ```

bin/lefthook/eslint-lint

@@ -31,7 +31,7 @@ if [ -n "$root_and_packages_pro_files" ]; then
   fi
   printf "  %s\n" $root_and_packages_pro_files
 
-  if ! yarn run eslint $root_and_packages_pro_files --fix; then
+  if ! yarn run eslint $root_and_packages_pro_files --fix --report-unused-disable-directives; then
     exit_code=1
   fi
 
@@ -53,7 +53,7 @@ if [ -n "$react_on_rails_pro_files" ]; then
   # Strip react_on_rails_pro/ prefix for running in Pro directory
   react_on_rails_pro_files_relative=$(echo "$react_on_rails_pro_files" | sed 's|^react_on_rails_pro/||')
 
-  if ! (cd react_on_rails_pro && yarn run eslint $react_on_rails_pro_files_relative --fix); then
+  if ! (cd react_on_rails_pro && yarn run eslint $react_on_rails_pro_files_relative --fix --report-unused-disable-directives); then
     exit_code=1
   fi
 

eslint.config.ts

@@ -17,7 +17,7 @@ const compat = new FlatCompat({
 });
 
 // eslint-disable-next-line @typescript-eslint/no-deprecated
-const config = tsEslint.config([
+export default tsEslint.config([
   // eslint-disable-next-line @typescript-eslint/no-unsafe-argument, @typescript-eslint/no-unsafe-call, @typescript-eslint/no-unsafe-member-access
   includeIgnoreFile(path.resolve(__dirname, '.gitignore')),
   globalIgnores([
@@ -267,5 +267,3 @@ const config = tsEslint.config([
   // https://github.com/prettier/eslint-plugin-prettier?tab=readme-ov-file#configuration-new-eslintconfigjs
   prettierRecommended,
 ]);
-
-export default config;

packages/react-on-rails/src/context.ts

@@ -1,10 +1,10 @@
 import type { ReactOnRailsInternal, RailsContext } from './types/index.ts';
 
 declare global {
-  /* eslint-disable vars-on-top,no-underscore-dangle */
-  var ReactOnRails: ReactOnRailsInternal | undefined;
-  var __REACT_ON_RAILS_EVENT_HANDLERS_RAN_ONCE__: boolean;
-  /* eslint-enable vars-on-top,no-underscore-dangle */
+  /* eslint-disable no-underscore-dangle */
+  let ReactOnRails: ReactOnRailsInternal | undefined;
+  let __REACT_ON_RAILS_EVENT_HANDLERS_RAN_ONCE__: boolean;
+  /* eslint-enable no-underscore-dangle */
 }
 
 let currentRailsContext: RailsContext | null = null;