Update notebooks and project files

.hfignore

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+CLAUDE.md
+.claude/
+docs/superpowers/
+_git_history_archive.txt

launch-app.command

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+#!/bin/bash
+cd "$(dirname "$0")"
+
+if [ -d "venv" ]; then
+    source venv/bin/activate
+elif [ -d "../spam-xai-project/venv" ]; then
+    source ../spam-xai-project/venv/bin/activate
+fi
+
+echo "Starting Streamlit app..."
+echo "Open http://localhost:8501 in your browser"
+echo ""
+streamlit run app.py

launch-gradio.command

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+#!/bin/bash
+# Double-click this file in Finder to launch the Spam Classifier UI
+cd "$(dirname "$0")"
+
+if [ -d "venv" ]; then
+    source venv/bin/activate
+fi
+
+echo "Starting Spam Classifier..."
+echo "Opening http://127.0.0.1:7860 in your browser..."
+sleep 2 && open http://127.0.0.1:7860 &
+python3.11 app.py

launch-notebook.command

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+#!/bin/bash
+# Double-click this file in Finder to open the student teaching notebook
+# (the main turn-in artifact for the course).
+cd "$(dirname "$0")"
+
+if [ -d "venv" ]; then
+    source venv/bin/activate
+fi
+
+python3.11 -m pip install jupyter wordcloud -q 2>/dev/null
+echo "Opening student notebook..."
+python3.11 -m jupyter notebook notebooks/spam_classifier_xai_student.ipynb

retrain.command

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+#!/bin/bash
+cd "$(dirname "$0")"
+
+# Check for venv, create if needed
+if [ -d "venv" ]; then
+    source venv/bin/activate
+else
+    echo "No venv found. Creating one..."
+    python3 -m venv venv
+    source venv/bin/activate
+    pip install -r requirements.txt
+fi
+
+echo "============================================================"
+echo "  Spam XAI Project — Retrain Random Forest classifier"
+echo "  Features: 3000 TF-IDF + 11 metadata features"
+echo "  Data:     SpamAssassin + Enron + newsletters"
+echo "  Time:     ~5-10 minutes"
+echo "  Saves:    models/ (random_forest_spam.joblib, etc.)"
+echo "============================================================"
+echo ""
+python3 retrain.py
+echo ""
+echo "Done! Models saved to models/"
+echo ""
+echo "Press any key to close..."
+read -n 1