feat: initial dashboard implementation and robust attendance parsing

- Added a Makefile to easily run project scripts (fees, match, web, image)
- Modified attendance.py to dynamically handle a variable number of header rows from the Google Sheet
- Updated both attendance calculations and calculate_fees terminal output to show actual attendance counts (e.g., '750 CZK (3)')
- Created a Flask web dashboard (app.py and templates/fees.html) to view member fees in an attractive, condensed, terminal-like UI
- Bound the Flask server to port 5000 and added a routing alias from '/' to '/fees'
- Configured Python virtual environment (.venv) creation directly into the Makefile to resolve global pip install errors on macOS

Co-authored-by: Antigravity <antigravity@deepmind.com>

scripts/calculate_fees.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+"""Calculate monthly fees from the FUJ Tuesday practice attendance sheet."""
+
+from datetime import datetime
+
+from attendance import get_members_with_fees
+
+
+def main():
+    members, sorted_months = get_members_with_fees()
+    if not members:
+        print("No data.")
+        return
+
+    # Filter to adults only for display
+    results = [(name, fees) for name, tier, fees in members if tier == "A"]
+
+    # Format month labels
+    month_labels = {
+        m: datetime.strptime(m, "%Y-%m").strftime("%b %Y") for m in sorted_months
+    }
+
+    # Print table
+    name_width = max((len(r[0]) for r in results), default=20)
+    col_width = 15
+
+    header = f"{'Member':<{name_width}}"
+    for m in sorted_months:
+        header += f" | {month_labels[m]:>{col_width}}"
+    print(header)
+    print("-" * len(header))
+
+    monthly_totals = {m: 0 for m in sorted_months}
+    for name, month_fees in results:
+        line = f"{name:<{name_width}}"
+        for m in sorted_months:
+            fee, count = month_fees[m]
+            monthly_totals[m] += fee
+            cell = f"{fee} CZK ({count})" if count > 0 else "-"
+            line += f" | {cell:>{col_width}}"
+        print(line)
+
+    # Totals row
+    print("-" * len(header))
+    totals_line = f"{'TOTAL':<{name_width}}"
+    for m in sorted_months:
+        cell = f"{monthly_totals[m]} CZK"
+        totals_line += f" | {cell:>{col_width}}"
+    print(totals_line)
+
+
+if __name__ == "__main__":
+    main()