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docs/update-tom-select.md

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-# Tom Select Migration Summary
-
-## Overview
-We successfully migrated ActiveAdmin Searchable Select from Select2 (jQuery-based) to Tom Select (vanilla JS, TypeScript-ready) with Tailwind CSS 4 support.
-
-## Key Changes Made
-
-### 1. Package Dependencies
-**Removed:**
-- `jquery` peer dependency
-- `select2` peer dependency
-
-**Added:**
-- `tom-select: ^2.4.3` peer dependency
-
-### 2. JavaScript Changes
-
-#### `/src/index.js`
-- Complete rewrite without jQuery dependency
-- Uses native `fetch()` for AJAX requests
-- Tom Select initialization with proper option mapping
-- Handles Select2 → Tom Select option conversion (id/text → valueField/labelField)
-
-#### Removed Legacy Files:
-- `/src/searchable_select/init.js` - Legacy compatibility file removed
-- `/spec/internal/inject-jquery.js` - jQuery injection hack removed
-- `/spec/internal/build_activeadmin_css.js` - Old CSS build hack removed
-
-### 3. CSS/Styling Changes
-
-#### New Files Created:
-- `/src/tom-select-tailwind.css` - Complete Tom Select styles with Tailwind classes (consolidated single file)
-
-#### Package Exports Updated:
-```json
-"exports": {
-  "./tom-select-tailwind": "./src/tom-select-tailwind.css"
-}
-```
-
-#### Removed Files:
-- `/src/searchable_select.css` - Consolidated into tom-select-tailwind.css
-- All legacy Select2 CSS imports
-
-### 4. Build Process (Tailwind 3)
-
-#### New Test App Structure:
-```
-/spec/internal/
-├── tailwind.config.js                   # Tailwind 3 config
-├── app/assets/stylesheets/
-│   └── active_admin.tailwind.css        # Main CSS entry with Tom Select styles
-├── build-css.js                         # Node script for CSS build
-├── esbuild.config.js                    # JavaScript build config
-└── package.json                         # Simplified scripts
-```
-
-#### Build Commands:
-- `npm run build:css` → Runs Tailwind CSS via `build-css.js`
-- `npm run build:js` → Runs esbuild for JavaScript bundling
-- `npm run build` → Builds both JS and CSS
-
-#### CSS Build Process Fix:
-- Integrated comprehensive ActiveAdmin styles from docs/tailwind-4 setup
-- Included all ActiveAdmin component styles (panels, data tables, filters, forms, etc.)
-- Tom Select styles are imported at the end of the CSS file
-- All styles are properly processed by Tailwind CSS and included in the final build
-- Fixed styling issues that were breaking ActiveAdmin UI components
-
-### 5. Test Updates
-
-#### CSS Class Changes:
-| Select2 | Tom Select |
-|---------|------------|
-| `.select2-container` | `.ts-wrapper` or `.ts-control` |
-| `.select2-dropdown` | `.ts-dropdown` |
-| `.select2-results__option` | `.ts-dropdown .option` |
-| `.select2-selection` | `.ts-control .item` |
-| `.select2-search__field` | `.ts-control input` |
-
-#### Helper Method Updates in Tests:
-- `expand_select_box`: Now clicks `.ts-control`
-- `enter_search_term`: Targets `.ts-control input`
-- `select_box_items`: Finds `.ts-dropdown .option`
-- `finished_all_ajax_requests`: No longer uses jQuery.active
-
-### 6. Documentation Structure
-
-#### Example Files (with credits):
-`/docs/tailwind-4/` - Example Tailwind 4 setup files
-- Credit: https://gist.github.com/amkisko/af1b2f7dc4f0f941437ea16400277864
-
-### 7. Migration Path for Users
-
-Users will need to:
-1. Update their `Gemfile` to use the new version
-2. Remove jQuery and Select2 dependencies
-3. Add Tom Select dependency: `npm install tom-select@^2.4.3`
-4. Update their CSS imports to use Tom Select styles
-5. If using Tailwind, import our tom-select-tailwind styles
-6. Update any custom JavaScript that referenced Select2 APIs
-
-### 8. Breaking Changes
-
-1. **No jQuery Required**: Apps no longer need jQuery for searchable selects
-2. **CSS Classes Changed**: All Select2 classes replaced with Tom Select equivalents
-3. **JavaScript API Different**: Tom Select has different initialization and options
-4. **Legacy init.js Removed**: No backward compatibility layer
-
-### 9. Benefits of Migration
-
-1. **No jQuery Dependency**: Reduces bundle size significantly
-2. **Modern JavaScript**: ES6+ modules, TypeScript support
-3. **Better Performance**: Tom Select is lighter and faster
-4. **Tailwind 4 Ready**: Native Tailwind utility classes
-5. **Future-Proof**: Active development, modern architecture
-
-### 10. Files to Commit
-
-**Modified:**
-- `/package.json` - Updated dependencies and exports
-- `/src/index.js` - Rewritten for Tom Select
-- `/spec/features/*.rb` - Updated test selectors
-- `/spec/internal/package.json` - Removed jQuery, added Tom Select
-- `/spec/internal/app/js/active_admin.js` - Tom Select import
-
-**Created:**
-- `/src/tom-select-tailwind.css`
-- `/src/searchable_select.css`
-- `/spec/internal/config/tailwind-active_admin.config.js`
-- `/spec/internal/app/assets/stylesheets/active_admin.tailwind.css`
-- `/spec/internal/lib/tasks/active_admin.rake`
-
-**Deleted:**
-- `/src/searchable_select/` directory
-- `/spec/internal/inject-jquery.js`
-- `/spec/internal/build_activeadmin_css.js`
-- `/spec/internal/tailwind-active_admin.config.js` (old location)
-
-### 11. Testing Status
-
-✅ **Tests Fixed and Working:**
-- All JavaScript initialization tests passing
-- Tom Select properly initializes in test environment
-- Clear button functionality working for all searchable selects
-- Assets properly served in test environment
-
-**Test Environment Setup:**
-- Assets must be built: `npm run build:js` and `bundle exec rake active_admin:build`
-- Assets copied to public directory for test environment: 
-  ```bash
-  mkdir -p public/javascripts public/stylesheets
-  cp app/assets/builds/active_admin.js public/javascripts/
-  cp app/assets/builds/active_admin.css public/stylesheets/
-  ```
-- Tests use Playwright driver for modern JavaScript support
-
-**Remaining Test Issues (4 failures):**
-- AJAX options not loading properly in some integration tests
-- Dropdown visibility detection needs adjustment for Tom Select
-- Search input focus/activation needs refinement
-
-### 12. Key Implementation Details
-
-#### Clear Button Feature:
-- All searchable selects are clearable by default
-- Implemented via `data-clearable="true"` attribute
-- Tom Select's `clear_button` plugin automatically added
-- Clear button positioned at `right: 2rem` for better UX
-- Can be disabled by setting `clearable: false` in Ruby options
-
-#### JavaScript Module Export:
-- Main module exports both `setupAutoInit` and `initSearchableSelects`
-- Functions made globally available in test environment via `window` object
-- Auto-initialization on DOMContentLoaded, Turbo load, and has_many_add events
-
-### 13. Next Steps
-
-1. ✅ Complete test fixes for remaining failures (mostly done)
-2. Update README.md with new installation instructions
-3. Create migration guide at `/docs/guide-update-your-app.md`
-4. Version bump to 5.0.0 (major version due to breaking changes)
-5. Test with real ActiveAdmin applications
-6. Consider adding TypeScript definitions for better IDE support