assets: Deleted 3 images via Visual Asset Manager

DELETED FILES (via backend API):
- interior_kitchen_fridge_1767523986761.png
- interior_secret_passage_1767524112663.png
- uploaded_image_1767490252657.png

UPDATED:
- tools/asset_manifest.json: Regenerated (1,166 → 1,163 assets)

ADDED DOCUMENTATION:
- docs/BACKEND_SETUP.md: Backend API setup guide
- tools/requirements.txt: Flask dependencies

TOTAL ASSETS: 1,166 → 1,163 (-3)

METHOD: Visual Asset Manager backend API
BACKEND STATUS: ✅ Working perfectly on port 5001
DELETE FEATURE: ✅ Fully functional

First successful delete via UI! 🎉

docs/BACKEND_SETUP.md

@@ -0,0 +1,218 @@
+# 🚀 Visual Asset Manager - Backend Setup
+
+**Status**: ✅ FULLY FUNCTIONAL  
+**Delete**: Now actually deletes files from disk  
+**Re-roll**: API ready (image generation TBD)
+
+---
+
+## 🎯 QUICK START
+
+### 1. Install Dependencies
+```bash
+pip3 install Flask flask-cors
+```
+
+### 2. Start Backend Server
+```bash
+cd /Users/davidkotnik/repos/novafarma
+python3 tools/asset_backend.py
+```
+
+Server starts on: **http://localhost:5000**
+
+### 3. Start Frontend Server
+```bash
+# In another terminal:
+cd /Users/davidkotnik/repos/novafarma
+python3 -m http.server 8080
+```
+
+Frontend URL: **http://localhost:8080/tools/visual_asset_manager.html**
+
+---
+
+## ✅ WHAT NOW WORKS:
+
+### 🗑️ DELETE (Fully Functional!)
+1. Klikni "Delete" na asset cardu
+2. Confirm dialog
+3. **Backend dejansko izbriše datoteko iz diska**
+4. Auto-regenerira manifest
+5. Galerija se osvež i
+
+**Flow:**
+```
+Frontend → DELETE /api/asset/{id}
+    ↓
+Backend finds file
+    ↓
+os.remove() - file deleted
+    ↓
+Regenerate manifest
+    ↓
+Return success → Frontend reloads
+```
+
+### 🔄 RE-ROLL (API Ready)
+1. Klikni "Re-roll"
+2. Backend API endpoint ready
+3. **TODO**: Image generation not yet implemented
+4. For now: Shows placeholder message
+
+---
+
+## 🔌 API ENDPOINTS:
+
+### Health Check
+```bash
+GET http://localhost:5000/api/health
+```
+
+### Get All Assets
+```bash
+GET http://localhost:5000/api/assets
+```
+
+### Delete Asset
+```bash
+DELETE http://localhost:5000/api/asset/{asset_id}
+
+Response:
+{
+  "success": true,
+  "message": "Asset deleted successfully",
+  "deleted_file": "assets/path/to/file.png"
+}
+```
+
+### Re-roll Asset
+```bash
+POST http://localhost:5000/api/asset/{asset_id}/reroll
+
+Response:
+{
+  "success": true,
+  "message": "Re-roll requested",
+  "note": "Image generation not yet implemented"
+}
+```
+
+### Regenerate Manifest
+```bash
+POST http://localhost:5000/api/manifest/regenerate
+
+Response:
+{
+  "success": true,
+  "message": "Manifest regenerated",
+  "total_assets": 1166
+}
+```
+
+---
+
+## 🎬 WORKFLOW EXAMPLE:
+
+### Delete Unwanted Asset:
+
+1. **Odpri galerijo**: http://localhost:8080/tools/visual_asset_manager.html
+2. **Find asset**: Use search or filter
+3. **Click Delete**: Red button
+4. **Confirm**: Dialog asks for confirmation
+5. **Wait**: Backend deletes file (2s)
+6. **Auto-refresh**: Gallery shows updated list
+
+**Result**: File physically deleted from disk!
+
+---
+
+## 🛠️ DEVELOPMENT:
+
+### Backend Code
+`tools/asset_backend.py` - Flask API server
+
+### Frontend Code
+`tools/visual_asset_manager.html` - Updated with API calls
+
+### Dependencies
+`to ols/requirements.txt`:
+- Flask==3.0.0
+- flask-cors==4.0.0
+
+---
+
+## 🔒 SECURITY NOTES:
+
+⚠️ **Development Only**
+- CORS is open (allows all origins)
+- No authentication
+- Debug mode enabled
+- NOT for production use
+
+**For production**, add:
+- Authentication
+- CORS restrictions
+- Rate limiting
+- Input validation
+- HTTPS
+
+---
+
+## 🐛 TROUBLESHOOTING:
+
+### Backend not starting?
+```bash
+# Check if Flask installed:
+pip3 show Flask
+
+# Check port 5000 available:
+lsof -ti:5000
+
+# View backend logs:
+tail -f /tmp/backend.log
+```
+
+### Delete not working?
+```bash
+# Check backend is running:
+curl http://localhost:5000/api/health
+
+# Should return:
+# {"status": "ok", "message": "Asset Backend API is running"}
+```
+
+### CORS errors?
+```bash
+# Make sure both servers running:
+# Backend: localhost:5000
+# Frontend: localhost:8080
+```
+
+---
+
+## 📊 STATUS:
+
+| Feature | Status | Notes |
+|---------|--------|-------|
+| Backend API | ✅ Running | Flask on port 5000 |
+| Delete Endpoint | ✅ Working | Deletes files from disk |
+| Re-roll Endpoint | ⚠️ API Only | Image gen not implemented |
+| Manifest Regen | ✅ Working | Auto-updates after delete |
+| Frontend Integration | ✅ Working | API calls functional |
+
+---
+
+## 🚀 NEXT STEPS:
+
+1. **Image Generation**: Integrate Gemini API for re-roll
+2. **Batch Delete**: Select multiple assets
+3. **Undo**: Trash bin before permanent delete
+4. **Preview Changes**: Show what will be deleted
+5. **Authentication**: Add user login
+
+---
+
+**Setup Time**: ~15 min  
+**Dependencies**: Flask, flask-cors  
+**Ready**: YES ✅