feat: implement local payment QR codes and update AI co-authoring rules

QR codes are now generated locally using the 'qrcode' library for better privacy and reliability.
Updated .agent/rules.md with co-author details and Conventional Commits preference.

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

.agent/rules.md

@@ -1,5 +1,7 @@
 # Antigravity Agent Configuration
 # This file provides global rules for the Antigravity agent when working on this repository.
 
-- **Git Commits**: When making git commits, always append the following co-author trailer to the end of the commit message to indicate AI assistance:
-  `Co-authored-by: Antigravity <antigravity@deepmind.com>`
+- **Identity**: Antigravity AI (Assistant)
+- **Git Commits**: Always follow [Conventional Commits](https://www.conventionalcommits.org/) and append the co-author trailer:
+  `Co-authored-by: Antigravity <antigravity@google.com>`
+- **Workflow**: Prefer updating `task.md` and `walkthrough.md` in the `.gemini/antigravity/brain/` directory to track progress and document changes.

app.py

@@ -3,7 +3,10 @@ from pathlib import Path
 from datetime import datetime
 import re
 import time
-from flask import Flask, render_template, g
+import os
+import io
+import qrcode
+from flask import Flask, render_template, g, send_file, request
 
 # Add scripts directory to path to allow importing from it
 scripts_dir = Path(__file__).parent / "scripts"
@@ -14,6 +17,9 @@ from match_payments import reconcile, fetch_sheet_data, fetch_exceptions, normal
 
 app = Flask(__name__)
 
+# Bank account for QR code payments (can be overridden by ENV)
+BANK_ACCOUNT = os.environ.get("BANK_ACCOUNT", "CZ8520100000002800359168")
+
 @app.before_request
 def start_timer():
     g.start_time = time.perf_counter()
@@ -141,20 +147,34 @@ def reconcile_view():
         for m in sorted_months:
             mdata = data["months"].get(m, {"expected": 0, "original_expected": 0, "paid": 0})
             expected = mdata["expected"]
-            original = mdata["original_expected"]
             paid = int(mdata["paid"])
             
-            cell_status = ""
-            if expected == 0 and paid == 0:
-                cell = "-"
-            elif paid >= expected and expected > 0:
-                cell = "OK"
-            elif paid > 0:
-                cell = f"{paid}/{expected}"
-            else:
-                cell = f"UNPAID {expected}"
+            status = "empty"
+            cell_text = "-"
+            amount_to_pay = 0
             
-            row["months"].append(cell)
+            if expected > 0:
+                if paid >= expected:
+                    status = "ok"
+                    cell_text = "OK"
+                elif paid > 0:
+                    status = "partial"
+                    cell_text = f"{paid}/{expected}"
+                    amount_to_pay = expected - paid
+                else:
+                    status = "unpaid"
+                    cell_text = f"UNPAID {expected}"
+                    amount_to_pay = expected
+            elif paid > 0:
+                status = "surplus"
+                cell_text = f"PAID {paid}"
+            
+            row["months"].append({
+                "text": cell_text,
+                "status": status,
+                "amount": amount_to_pay,
+                "month": month_labels[m]
+            })
             
         row["balance"] = data["total_balance"] # Updated to use total_balance
         formatted_results.append(row)
@@ -178,7 +198,8 @@ def reconcile_view():
         debts=debts,
         unmatched=unmatched,
         attendance_url=attendance_url,
-        payments_url=payments_url
+        payments_url=payments_url,
+        bank_account=BANK_ACCOUNT
     )
 
 @app.route("/payments")
@@ -221,5 +242,36 @@ def payments():
         payments_url=payments_url
     )
 
+@app.route("/qr")
+def qr_code():
+    account = request.args.get("account", BANK_ACCOUNT)
+    amount = request.args.get("amount", "0")
+    message = request.args.get("message", "")
+    
+    # QR Platba standard: SPD*1.0*ACC:accountNumber*BC:bankCode*AM:amount*CC:CZK*MSG:message
+    acc_parts = account.split('/')
+    if len(acc_parts) == 2:
+        acc_str = f"{acc_parts[0]}*BC:{acc_parts[1]}"
+    else:
+        acc_str = account
+
+    try:
+        amt_val = float(amount)
+        amt_str = f"{amt_val:.2f}"
+    except ValueError:
+        amt_str = "0.00"
+
+    # Message max 60 characters
+    msg_str = message[:60]
+    
+    qr_data = f"SPD*1.0*ACC:{acc_str}*AM:{amt_str}*CC:CZK*MSG:{msg_str}"
+    
+    img = qrcode.make(qr_data)
+    buf = io.BytesIO()
+    img.save(buf, format='PNG')
+    buf.seek(0)
+    
+    return send_file(buf, mimetype='image/png')
+
 if __name__ == "__main__":
     app.run(debug=True, host='0.0.0.0', port=5001)

templates/reconcile.html

@@ -138,6 +138,28 @@
 
         .cell-unpaid {
             color: #ff3333;
+            background-color: rgba(255, 51, 51, 0.05);
+            position: relative;
+        }
+
+        .pay-btn {
+            display: none;
+            position: absolute;
+            right: 5px;
+            top: 50%;
+            transform: translateY(-50%);
+            background: #ff3333;
+            color: white;
+            border: none;
+            border-radius: 3px;
+            padding: 2px 6px;
+            font-size: 10px;
+            cursor: pointer;
+            font-weight: bold;
+        }
+
+        .member-row:hover .pay-btn {
+            display: inline-block;
         }
 
         .cell-empty {
@@ -360,6 +382,42 @@
             margin-top: 5px;
             color: #222;
         }
+
+        /* QR Modal styles */
+        #qrModal .modal-content {
+            max-width: 400px;
+            text-align: center;
+        }
+
+        .qr-image {
+            background: white;
+            padding: 10px;
+            border-radius: 5px;
+            margin: 20px 0;
+            display: inline-block;
+        }
+
+        .qr-image img {
+            display: block;
+            width: 250px;
+            height: 250px;
+        }
+
+        .qr-details {
+            text-align: left;
+            margin-top: 15px;
+            font-size: 14px;
+            color: #ccc;
+        }
+
+        .qr-details div {
+            margin-bottom: 5px;
+        }
+
+        .qr-details span {
+            color: #00ff00;
+            font-family: monospace;
+        }
     </style>
 </head>
 
@@ -403,8 +461,12 @@
                     </td>
                     {% for cell in row.months %}
                     <td
-                        class="{% if cell == '-' %}cell-empty{% elif 'UNPAID' in cell %}cell-unpaid{% elif cell == 'OK' %}cell-ok{% endif %}">
-                        {{ cell }}
+                        class="{% if cell.status == 'empty' %}cell-empty{% elif cell.status == 'unpaid' or cell.status == 'partial' %}cell-unpaid{% elif cell.status == 'ok' %}cell-ok{% endif %}">
+                        {{ cell.text }}
+                        {% if cell.status == 'unpaid' or cell.status == 'partial' %}
+                        <button class="pay-btn"
+                            onclick="showPayQR('{{ row.name|e }}', {{ cell.amount }}, '{{ cell.month|e }}')">Pay</button>
+                        {% endif %}
                     </td>
                     {% endfor %}
                     <td class="{% if row.balance > 0 %}balance-pos{% elif row.balance < 0 %}balance-neg{% endif %}">
@@ -460,6 +522,25 @@
     </div>
     {% endif %}
 
+    <!-- QR Code Modal -->
+    <div id="qrModal" class="modal"
+        style="display:none; position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background-color: rgba(0, 0, 0, 0.9); z-index: 9999; justify-content: center; align-items: center;">
+        <div class="modal-content">
+            <div class="modal-header">
+                <div class="modal-title" id="qrTitle">Payment for ...</div>
+                <div class="close-btn" onclick="closeModal('qrModal')">[close]</div>
+            </div>
+            <div class="qr-image">
+                <img id="qrImg" src="" alt="Payment QR Code">
+            </div>
+            <div class="qr-details">
+                <div>Account: <span id="qrAccount"></span></div>
+                <div>Amount: <span id="qrAmount"></span> CZK</div>
+                <div>Message: <span id="qrMessage"></span></div>
+            </div>
+        </div>
+    </div>
+
     <div id="memberModal">
         <div class="modal-content">
             <div class="modal-header">
@@ -620,9 +701,16 @@
             document.getElementById('memberModal').classList.add('active');
         }
 
-        function closeModal() {
+        function closeModal(id) {
+            if (id) {
+                document.getElementById(id).style.display = 'none';
+                if (id === 'qrModal') {
+                    document.getElementById(id).style.display = 'none';
+                }
+            } else {
                 document.getElementById('memberModal').classList.remove('active');
             }
+        }
 
         // Existing filter script
         document.getElementById('nameFilter').addEventListener('input', function (e) {
@@ -644,6 +732,33 @@
         document.addEventListener('keydown', function (e) {
             if (e.key === 'Escape') closeModal();
         });
+        function showPayQR(name, amount, month) {
+            const account = "{{ bank_account }}";
+            const message = `${name} / ${month}`;
+            const qrTitle = document.getElementById('qrTitle');
+            const qrImg = document.getElementById('qrImg');
+            const qrAccount = document.getElementById('qrAccount');
+            const qrAmount = document.getElementById('qrAmount');
+            const qrMessage = document.getElementById('qrMessage');
+
+            qrTitle.innerText = `Payment for ${month}`;
+            qrAccount.innerText = account;
+            qrAmount.innerText = amount;
+            qrMessage.innerText = message;
+
+            const encodedMessage = encodeURIComponent(message);
+            const qrUrl = `/qr?account=${encodeURIComponent(account)}&amount=${amount}&message=${encodedMessage}`;
+
+            qrImg.src = qrUrl;
+            document.getElementById('qrModal').style.display = 'block';
+        }
+
+        // Close modal when clicking outside
+        window.onclick = function (event) {
+            if (event.target.className === 'modal') {
+                event.target.style.display = 'none';
+            }
+        }
     </script>
 </body>