feat(fees): reminder status column — sent/read tracking

New "Przypomnienie" column in yearly fee view shows:
- Empty: no reminder sent yet → button "Przypomnij"
- "✉ Wysłano 20.03": sent but not read → button "Ponów"
- "✓ Odczytano 20.03": sent and read → button "Ponów"
Status derived from last PrivateMessage with "przypomnienie o składce".

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

blueprints/admin/routes.py

@@ -667,7 +667,8 @@ def admin_fees():
                     'status': fee.status if fee else 'brak'
                 })
             else:
-                company_data = {'company': company, 'months': {}, 'monthly_rate': 0, 'has_data': False}
+                company_data = {'company': company, 'months': {}, 'monthly_rate': 0, 'has_data': False, 'reminder': None}
+                has_unpaid = False
                 for m in range(1, 13):
                     fee = fees.get((company.id, m))
                     company_data['months'][m] = fee
@@ -675,6 +676,23 @@ def admin_fees():
                         company_data['has_data'] = True
                         if not company_data['monthly_rate']:
                             company_data['monthly_rate'] = int(fee.amount)
+                        if fee.status in ('pending', 'partial', 'overdue'):
+                            has_unpaid = True
+                # Find last reminder message for this company
+                if has_unpaid:
+                    from database import PrivateMessage, UserCompany
+                    manager = db.query(UserCompany).filter(UserCompany.company_id == company.id).first()
+                    if manager:
+                        last_reminder = db.query(PrivateMessage).filter(
+                            PrivateMessage.recipient_id == manager.user_id,
+                            PrivateMessage.subject.ilike('%przypomnienie o składce%'),
+                        ).order_by(PrivateMessage.created_at.desc()).first()
+                        if last_reminder:
+                            company_data['reminder'] = {
+                                'sent_at': last_reminder.created_at,
+                                'is_read': last_reminder.is_read,
+                                'read_at': last_reminder.read_at,
+                            }
                 companies_fees.append(company_data)
 
         # Sort: companies with fee data first, then without

templates/admin/fees.html

@@ -356,6 +356,7 @@
                     {% else %}
                     <th>Sty</th><th>Lut</th><th>Mar</th><th>Kwi</th><th>Maj</th><th>Cze</th>
                     <th>Lip</th><th>Sie</th><th>Wrz</th><th>Paz</th><th>Lis</th><th>Gru</th>
+                    <th>Przypomnienie</th>
                     <th></th>
                     {% endif %}
                 </tr>
@@ -365,7 +366,7 @@
                 {% for cf in companies_fees %}
                 {% if not month and not cf.has_data and not ns.separator_shown %}
                 {% set ns.separator_shown = true %}
-                <tr><td colspan="13" style="background: var(--border); padding: var(--spacing-xs); text-align: center; font-size: var(--font-size-sm); color: var(--text-secondary); font-weight: 600;">Firmy bez danych o składkach</td></tr>
+                <tr><td colspan="15" style="background: var(--border); padding: var(--spacing-xs); text-align: center; font-size: var(--font-size-sm); color: var(--text-secondary); font-weight: 600;">Firmy bez danych o składkach</td></tr>
                 {% endif %}
                 <tr{% if not month and not cf.has_data %} style="opacity: 0.5;"{% endif %}>
                     {% if month %}
@@ -422,9 +423,18 @@
                         {% endif %}
                     </td>
                     {% endfor %}
+                    <td style="font-size:11px;white-space:nowrap;">
+                        {% if cf.reminder %}
+                            {% if cf.reminder.is_read %}
+                            <span style="color:var(--success);" title="Odczytano {{ cf.reminder.read_at.strftime('%d.%m %H:%M') if cf.reminder.read_at else '' }}">✓ Odczytano {{ cf.reminder.sent_at.strftime('%d.%m') }}</span>
+                            {% else %}
+                            <span style="color:var(--text-secondary);" title="Wysłano {{ cf.reminder.sent_at.strftime('%d.%m.%Y %H:%M') }}">✉ Wysłano {{ cf.reminder.sent_at.strftime('%d.%m') }}</span>
+                            {% endif %}
+                        {% endif %}
+                    </td>
                     <td>
                         {% if cf.has_data and cf.months.values()|selectattr('status', 'in', ['pending', 'partial', 'overdue'])|list %}
-                        <button class="btn btn-small" style="font-size:11px;padding:2px 8px;background:var(--warning);color:white;border:none;" onclick="openReminderModal({{ cf.company.id }}, '{{ cf.company.name|e }}', {{ year }})">Przypomnij</button>
+                        <button class="btn btn-small" style="font-size:11px;padding:2px 8px;background:var(--warning);color:white;border:none;" onclick="openReminderModal({{ cf.company.id }}, '{{ cf.company.name|e }}', {{ year }})">{{ 'Ponów' if cf.reminder else 'Przypomnij' }}</button>
                         {% endif %}
                     </td>
                     {% endif %}