Add CSV-based personalized card generation

Add template-based system for generating personalized brevet cards
from CSV data. Uses proper separation of concerns with template file
and Python script.

- Add brevetkarte-template.tex with placeholders
- Add generate_cards.py to read CSV and populate template
- Update Makefile with generate-personalized and build-personalized targets
- Update .gitignore to exclude generated files

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

generate_cards.py

@@ -0,0 +1,112 @@
+#!/usr/bin/env python3
+"""
+Generate personalized brevet cards from CSV data.
+"""
+import csv
+import sys
+from pathlib import Path
+
+def escape_latex(text):
+    """Escape special LaTeX characters."""
+    if not text:
+        return ""
+    replacements = {
+        '&': r'\&',
+        '%': r'\%',
+        '$': r'\$',
+        '#': r'\#',
+        '_': r'\_',
+        '{': r'\{',
+        '}': r'\}',
+        '~': r'\textasciitilde{}',
+        '^': r'\textasciicircum{}',
+        '\\': r'\textbackslash{}',
+    }
+    result = str(text)
+    for char, replacement in replacements.items():
+        result = result.replace(char, replacement)
+    return result
+
+def generate_card_from_template(template, data):
+    """Replace placeholders in template with participant data."""
+    name = f"{escape_latex(data['Vorname'])} {escape_latex(data['Nachname'])}"
+    street = escape_latex(data['Straße'])
+    plz_ort = f"{escape_latex(data['PLZ'])} {escape_latex(data['Ort'])}"
+    land = escape_latex(data['Land'])
+    medaille = "Ja" if data['Medaille'].lower() == 'ja' else "Nein"
+    startnr = escape_latex(data['Startnr'])
+
+    # Replace placeholders
+    card = template.replace('{{NAME}}', name)
+    card = card.replace('{{STREET}}', street)
+    card = card.replace('{{PLZ_ORT}}', plz_ort)
+    card = card.replace('{{LAND}}', land)
+    card = card.replace('{{MEDAILLE}}', medaille)
+    card = card.replace('{{STARTNR}}', startnr)
+
+    return card
+
+def main():
+    csv_file = Path("Export Brevetkarte.csv")
+    template_file = Path("brevetkarte-template.tex")
+    output_file = Path("brevetkarte-personalized.tex")
+
+    if not csv_file.exists():
+        print(f"Error: {csv_file} not found!", file=sys.stderr)
+        sys.exit(1)
+
+    if not template_file.exists():
+        print(f"Error: {template_file} not found!", file=sys.stderr)
+        sys.exit(1)
+
+    # Read template
+    print(f"Reading template from {template_file}...")
+    template = template_file.read_text(encoding='utf-8')
+
+    # Read CSV data
+    print(f"Reading participant data from {csv_file}...")
+    participants = []
+    with open(csv_file, 'r', encoding='utf-8-sig') as f:  # utf-8-sig handles BOM
+        reader = csv.DictReader(f)
+        for row in reader:
+            if row['Startnr']:  # Skip empty rows
+                participants.append(row)
+
+    if not participants:
+        print("No participants found in CSV file!", file=sys.stderr)
+        sys.exit(1)
+
+    print(f"Found {len(participants)} participant(s)")
+
+    # Generate document with all cards
+    cards = []
+    for i, participant in enumerate(participants):
+        card = generate_card_from_template(template, participant)
+        cards.append(card)
+
+    # Combine cards with spacing/page breaks
+    document_parts = []
+    for i, card in enumerate(cards):
+        document_parts.append(card)
+
+        # Add vertical space between cards on same page
+        if i % 2 == 0 and i < len(cards) - 1:
+            document_parts.append("\n\\vspace{0.8cm}\n\n")
+
+        # Add page break after every 2 cards (except at the end)
+        if i % 2 == 1 and i < len(cards) - 1:
+            document_parts.append("\n\\newpage\n\n")
+
+    # Close document
+    document_parts.append("\n\\end{document}\n")
+
+    # Write output
+    document = ''.join(document_parts)
+    output_file.write_text(document, encoding='utf-8')
+
+    print(f"Generated {output_file}")
+    print(f"Total pages: {(len(participants) + 1) // 2}")
+    print(f"Compile with: make build-personalized")
+
+if __name__ == "__main__":
+    main()