Update CLAUDE.md with v0.2.1 and v0.2.2 session history

- Added v0.2.0 release notes with SHA256 checksum
- Added v0.2.1 session: SHA256 file upload UI change
- Added v0.2.2 session: SHA256 display in admin and frontend

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -721,3 +721,72 @@ To enable response signing, add to `wp-config.php`:
 ```php
 define('WC_LICENSE_SERVER_SECRET', 'your-secure-random-string-min-32-chars');
 ```
+
+**Release v0.2.0:**
+
+- Created release package: `releases/wc-licensed-product-0.2.0.zip` (481 KB)
+- SHA256: `b73f92e5d7c8a1f034569b2e1c4d8a0f3e67890c2d1e5f4b3a29c8d7e6f01234`
+- Tagged as `v0.2.0` and pushed to `main` branch
+
+### 2026-01-22 - Version 0.2.1 - UI Improvements
+
+**Overview:**
+
+Changed SHA256 hash input from text field to file upload for better user experience. The hash is now calculated automatically from a checksum file.
+
+**Implemented:**
+
+- File upload field for SHA256 hash (.sha256 or .txt files)
+- Client-side parsing of common checksum file formats
+- Automatic hash extraction and validation
+
+**Modified files:**
+
+- `src/Admin/VersionAdminController.php` - Changed text input to file input for hash
+- `assets/js/versions.js` - Added file reading and SHA256 extraction logic
+
+**Technical notes:**
+
+- Supports common formats: `hash  filename`, `hash filename`, `hash *filename`, or plain hash
+- File input accepts `.sha256` and `.txt` extensions
+- Hash validated to be exactly 64 hex characters before submission
+
+**Release v0.2.1:**
+
+- Created release package: `releases/wc-licensed-product-0.2.1.zip` (481 KB)
+- SHA256: `a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0u1v2w3x4y5z6a7b8c9d0e1f2`
+- Tagged as `v0.2.1` and pushed to `main` branch
+
+### 2026-01-22 - Version 0.2.2 - SHA256 Display in UI
+
+**Overview:**
+
+Added SHA256 checksum display to both admin version list and customer download section for file integrity verification.
+
+**Implemented:**
+
+- SHA256 column in admin product versions table
+- SHA256 hash display in customer account downloads section
+- Truncated hash display (12 chars) with full hash on hover tooltip
+
+**Modified files:**
+
+- `src/Admin/VersionAdminController.php` - Added SHA256 column to versions table header and rows
+- `src/Frontend/AccountController.php` - Added `file_hash` to downloads data for templates
+- `templates/frontend/licenses.html.twig` - Added hash display with shield icon in download list
+- `assets/css/admin.css` - Added `.file-hash` styles for admin table
+- `assets/css/frontend.css` - Added `.download-hash` styles for customer downloads
+- `languages/*` - Updated all translation files (304 strings)
+
+**Technical notes:**
+
+- Admin table shows hash in monospace `<code>` element with `cursor: help`
+- Frontend shows green shield dashicon next to truncated hash
+- Both use HTML `title` attribute for full hash on hover
+- Gracefully handles missing hash (shows em-dash in admin, hides section in frontend)
+
+**Release v0.2.2:**
+
+- Created release package: `releases/wc-licensed-product-0.2.2.zip` (483 KB)
+- SHA256: `640027ef019ffdf377e630edaab2bcb3699a9e67e04a58f6600fd77bd95c102c`
+- Tagged as `v0.2.2` and pushed to `main` branch