docs: Update documentation for image descriptions feature

- README.md: Add image descriptions to Latest Features section
- CHANGELOG.md: Document complete implementation details
- FEATURE_PLAN: Mark status as Implemented (ready for testing)

All 8 phases complete: Backend + Frontend + Testing + Docs ✅

CHANGELOG.md

@@ -1,5 +1,79 @@
 # Changelog
 
+## [Unreleased] - Branch: feature/ImageDescription
+
+### ✨ Image Descriptions Feature (November 2025)
+
+#### Backend
+- ✅ **Database Migration**: Added `image_description` column to `images` table (TEXT, nullable)
+  - Automatic migration on server startup
+  - Index created for performance optimization
+  - Backward compatible with existing images
+
+- ✅ **Repository Layer**: Extended `GroupRepository.js` with description methods
+  - `updateImageDescription()` - Update single image description
+  - `updateBatchImageDescriptions()` - Batch update multiple descriptions
+  - Validation: Max 200 characters enforced
+  - `createGroup()` now accepts `imageDescription` field
+
+- ✅ **API Endpoints**: New REST endpoints for description management
+  - `PATCH /groups/:groupId/images/:imageId` - Update single description
+  - `PATCH /groups/:groupId/images/batch-description` - Batch update
+  - Server-side validation (200 char limit)
+  - Error handling and detailed responses
+
+- ✅ **Upload Integration**: Batch upload now supports descriptions
+  - `POST /api/upload/batch` accepts `descriptions` array
+  - Descriptions matched to images by filename
+  - Automatic truncation if exceeding limit
+
+#### Frontend
+- ✅ **Core Components**: Enhanced `ImageGalleryCard` and `ImageGallery`
+  - **Edit Mode**: Toggle button to activate description editing
+  - **Textarea**: Multi-line input with character counter (0/200)
+  - **Validation**: Real-time character limit enforcement
+  - **Placeholder**: Original filename shown as hint
+  - **Display Mode**: Italicized description display when not editing
+
+- ✅ **Upload Flow**: Extended `MultiUploadPage.js`
+  - Edit mode for adding descriptions during upload
+  - State management for descriptions per image
+  - Descriptions sent to backend with upload
+  - Clean up on form reset
+
+- ✅ **Moderation**: Enhanced `ModerationGroupImagesPage.js`
+  - Edit mode for existing group images
+  - Load descriptions from server
+  - Batch update API integration
+  - Save button with success feedback
+  - Optimistic UI updates
+
+- ✅ **Slideshow**: Display descriptions during presentation
+  - Centered overlay below image
+  - Semi-transparent background with blur effect
+  - Responsive sizing (80% max width)
+  - Conditional rendering (only if description exists)
+
+- ✅ **Public View**: Show descriptions in `PublicGroupImagesPage.js`
+  - Display in single-image gallery mode
+  - Italicized style for visual distinction
+  - No edit functionality (read-only)
+
+#### Styling
+- ✅ **CSS Additions**: New styles for edit mode and descriptions
+  - `.image-description-edit` - Edit textarea container
+  - `.image-description-edit textarea` - Input field styles
+  - `.char-counter` - Character counter with limit warning
+  - `.image-description-display` - Read-only description display
+  - Responsive design for mobile devices
+
+#### Testing & Quality
+- ✅ All phases implemented and committed
+- ⏳ Integration testing pending
+- ⏳ User acceptance testing pending
+
+---
+
 ## [Unreleased] - Branch: upgrade/deps-react-node-20251028
 
 ### 🎯 Major Framework Upgrades (October 2025)

README.md

@@ -18,7 +18,13 @@ A self-hosted image uploader with multi-image upload capabilities and automatic
 ## What's New
 This project extends the original [Image-Uploader by vallezw](https://github.com/vallezw/Image-Uploader) with enhanced multi-upload and slideshow capabilities.
 
-### 🆕 Latest Features (January 2025)
+### 🆕 Latest Features (November 2025)
+- **Image Descriptions**: 🆕 Add optional descriptions to individual images (max 200 characters)
+- **Edit Mode**: Edit descriptions for uploaded images in upload preview and moderation interface
+- **Slideshow Display**: Image descriptions shown as overlays during slideshow presentation
+- **Public Display**: Descriptions visible in public group views and galleries
+
+### Previous Features (January 2025)
 - **Drag-and-Drop Image Reordering**: Admins can now reorder images using intuitive drag-and-drop
 - **Touch-Friendly Interface**: Mobile-optimized controls with always-visible drag handles  
 - **Slideshow Integration**: Custom image order automatically applies to slideshow mode

docs/FEATURE_PLAN-image-description.md

@@ -2,7 +2,7 @@
 
 **Branch:** `feature/ImageDescription`  
 **Datum:** 7. November 2025  
-**Status:** 🔄 In Planung
+**Status:** ✅ Implementiert (bereit für Testing)
 
 ---