feat(elixir): QR code generate & download function

README.md

@@ -37,8 +37,9 @@ A modern, idiomatic Elixir/Phoenix port of the original PHP-based component inve
 - **Search & Filter**: Fast search across component names, descriptions, and keywords
 - **Category Organization**: Hierarchical category system for better organization
 - **Category Management**: Add, edit, delete categories through the web interface with hierarchical support
+- **Storage Location System**: Hierarchical storage locations (shelf → drawer → box) with automatic QR code generation
+- **QR Code Integration**: Automatic QR code generation and display for all storage locations with download capability
 - **Datasheet Links**: Direct links to component datasheets
-- **Position Tracking**: Track component storage locations
 - **Real-time Updates**: All changes are immediately reflected in the interface
 
 ## Setup
@@ -99,6 +100,7 @@ The application uses a simple password-based authentication system:
 - **`ComponentsElixirWeb.LoginLive`**: Authentication interface
 - **`ComponentsElixirWeb.ComponentsLive`**: Main component management interface
 - **`ComponentsElixirWeb.CategoriesLive`**: Category management interface
+- **`ComponentsElixirWeb.StorageLocationsLive`**: Hierarchical storage location management with QR codes
 
 ### Key Features
 - **Real-time updates**: Changes are immediately reflected without page refresh
@@ -116,19 +118,16 @@ The application uses a simple password-based authentication system:
 | Manual editing | `Inventory.update_component/2` | **NEW**: Full edit functionality with validation |
 | `changeAmount.php` | `Inventory.update_component_count/2` | Atomic operations, constraints |
 | Manual category management | `CategoriesLive` + `Inventory.create_category/1` | **NEW**: Full category CRUD with web interface |
+| Manual location tracking | `StorageLocationsLive` + `Inventory` context | **NEW**: Hierarchical storage locations with automatic QR codes |
 | `imageUpload.php` | Phoenix LiveView file uploads with `.live_file_input` | **IMPLEMENTED**: Full image upload with preview, validation, and automatic cleanup |
 | Session management | Phoenix sessions + LiveView | Built-in CSRF protection |
 
 ## 🚀 Future Enhancements
 
-### Priority 1: Complete QR Code System (see [qr_storage_system](qr_storage_system.md))
-- **QR Code Image Generation** - Add Elixir library (e.g., `qr_code` hex package) to generate actual QR code images
-- **QR Code Display in Interface** - Show generated QR code images in the storage locations interface
-- **Camera Integration** - JavaScript-based QR scanning with camera access for mobile/desktop
-- **Multi-QR Code Detection** - Spatial analysis and disambiguation for multiple codes in same image
-
 ### Component Management
 - **Barcode Support** - Generate and scan traditional barcodes in addition to QR codes
+- **Camera Integration** - JavaScript-based QR scanning with camera access for mobile/desktop
+- **Multi-QR Code Detection** - Spatial analysis and disambiguation for multiple codes in same image
 - **Bulk Operations** - Import/export components from CSV, batch updates
 - **Search and Filtering** - Advanced search by specifications, tags, location
 - **Component Templates** - Reusable templates for common component types
@@ -143,14 +142,12 @@ The application uses a simple password-based authentication system:
 ### Storage Location System Foundation ✅ **COMPLETED**
 - **Database Schema** ✅ Complete - Hierarchical storage locations with parent-child relationships
 - **Storage Location CRUD** ✅ Complete - Full create, read, update, delete operations via web interface
-- **QR Code Data Generation** ✅ Complete - Text-based QR codes with format `SL:{level}:{code}:{parent}`
 - **Hierarchical Organization** ✅ Complete - Unlimited nesting (shelf → drawer → box)
 - **Web Interface** ✅ Complete - Storage locations management page with navigation
 - **Component-Storage Integration** ✅ Complete - Components can now be assigned to storage locations via dropdown interface
 
-### QR Code System - Still Needed 🚧 **NOT IMPLEMENTED**
-- **Visual QR Code Generation** ❌ Missing - No actual QR code images are generated
-- **QR Code Display** ❌ Missing - QR codes not shown in interface (as seen in screenshot)
+### QR Code System - Still Needed 🚧 **PARTIALLY IMPLEMENTED**
+- **Visual QR Code Generation** ✅ Complete - QR code images are generated and displayed for all storage locations
 - **QR Code Scanning** ❌ Missing - No camera integration or scanning functionality
 - **QR Code Processing** ❌ Missing - Backend logic for processing scanned codes
 - **Multi-QR Disambiguation** ❌ Missing - No handling of multiple QR codes in same image