docs: Update architecture documentation and add auto-match load analysis

This commit updates the `ARCHITECTURE.md` file to reflect the transition to a web-based application, including new features and system overview. Additionally, it introduces `AUTOMATCH_LOAD_ANALYSIS.md`, detailing performance issues with the Auto-Match page and recommendations for optimizations. A new document, `CONFIDENCE_CALIBRATION_SUMMARY.md`, is also added to explain the implementation of a confidence calibration system for face recognition, ensuring more accurate match probabilities. These updates enhance the project's documentation and provide insights for future improvements.

docs/QUICK_START.md

@@ -0,0 +1,129 @@
+# PunimTag - Quick Start Guide
+
+## 🚀 Running the Application
+
+### Start Dashboard
+```bash
+source venv/bin/activate
+python run_dashboard.py
+```
+
+### Run CLI Tool
+```bash
+source venv/bin/activate
+python -m src.photo_tagger --help
+```
+
+---
+
+## 📁 Project Structure
+
+```
+punimtag/
+├── src/
+│   ├── core/          # Business logic
+│   ├── gui/           # GUI components
+│   └── utils/         # Utilities
+├── tests/             # Test suite
+├── docs/              # Documentation
+├── .notes/            # Project planning
+└── run_dashboard.py   # Main launcher
+```
+
+---
+
+## 📚 Key Documentation
+
+- **README.md** - Main documentation
+- **CONTRIBUTING.md** - How to contribute
+- **docs/ARCHITECTURE.md** - System design
+- **RESTRUCTURE_SUMMARY.md** - Restructure details
+- **IMPORT_FIX_SUMMARY.md** - Import fixes
+
+---
+
+## 🔧 Common Tasks
+
+### Add Photos
+1. Open dashboard: `python run_dashboard.py`
+2. Click "Scan Photos" in menu
+3. Select folder with photos
+
+### Process Faces
+1. Open dashboard
+2. Click "Process Photos" button
+3. Wait for face detection to complete
+
+### Identify People
+1. Open "Identify" tab
+2. View unidentified faces
+3. Enter person name or select existing
+4. Click "Identify"
+
+### Search Photos
+1. Open "Search" tab
+2. Enter search criteria (name, date, tags)
+3. View results
+
+---
+
+## 🐛 Troubleshooting
+
+### ModuleNotFoundError
+**Solution**: Use `run_dashboard.py` launcher, not direct file execution
+
+### Import Errors
+**Solution**: Make sure you're in the venv:
+```bash
+source venv/bin/activate
+```
+
+### PIL/ImageTk Error
+**Solution**: Install Pillow in venv:
+```bash
+pip install Pillow
+```
+
+---
+
+## 💡 Tips
+
+- Always activate venv before running
+- Use `run_dashboard.py` for GUI
+- Use `python -m src.photo_tagger` for CLI
+- Check `.notes/` for planning docs
+- Read `docs/ARCHITECTURE.md` for system design
+
+---
+
+## 📞 Need Help?
+
+1. Check documentation in `docs/`
+2. Read `.notes/` for planning info
+3. See `CONTRIBUTING.md` for guidelines
+
+---
+
+**Quick Command Reference:**
+
+```bash
+# Activate environment
+source venv/bin/activate
+
+# Run dashboard
+python run_dashboard.py
+
+# Run CLI
+python -m src.photo_tagger
+
+# Run tests
+python -m pytest tests/
+
+# Deactivate environment
+deactivate
+```
+
+---
+
+**Last Updated**: October 15, 2025
+