User management and module improvements

- Added daily_mirror module to permissions system
- Fixed user module management - updates now work correctly
- Implemented dashboard module filtering based on user permissions
- Fixed warehouse create_locations page (config parser and delete)
- Implemented POST-Redirect-GET pattern to prevent duplicate entries
- Added application license system with validation middleware
- Cleaned up debug logging code
- Improved user module selection with fetch API instead of form submit

py_app/app/templates/download_extension.html

@@ -304,6 +304,81 @@
     </table>
 </div>
 
+<div class="qz-pairing-card" style="margin-top: 40px;">
+    <h2>🔐 Application License Management</h2>
+    
+    {% if license_data %}
+    <div class="qz-result" style="{% if license_data.days_remaining <= 30 %}background: #fff3e0; border-left-color: #ff9800;{% elif license_data.days_remaining <= 7 %}background: #ffebee; border-left-color: #f44336;{% endif %}">
+        <div style="margin-bottom: 8px;">
+            <strong>🔑 License Key:</strong> <span>{{ license_data.license_key }}</span>
+        </div>
+        <div style="margin-bottom: 8px;">
+            <strong>📅 Created:</strong> {{ license_data.created_at }}
+        </div>
+        <div style="margin-bottom: 8px;">
+            <strong>⏰ Valid Until:</strong> {{ license_data.valid_until }}
+            {% if license_data.days_remaining is defined %}
+                {% if license_data.days_remaining > 0 %}
+                    <span style="margin-left: 8px; padding: 2px 8px; background: {% if license_data.days_remaining <= 7 %}#f44336{% elif license_data.days_remaining <= 30 %}#ff9800{% else %}#4caf50{% endif %}; color: white; border-radius: 4px; font-size: 0.85em;">
+                        {{ license_data.days_remaining }} days remaining
+                    </span>
+                {% else %}
+                    <span style="margin-left: 8px; padding: 2px 8px; background: #f44336; color: white; border-radius: 4px; font-size: 0.85em;">
+                        ⚠️ EXPIRED
+                    </span>
+                {% endif %}
+            {% endif %}
+        </div>
+        <div style="margin-top: 16px;">
+            <form method="POST" action="/revoke_app_license" style="display: inline-block;">
+                <button class="btn-delete" type="submit" onclick="return confirm('Are you sure you want to REVOKE the application license?\n\nThis will prevent all non-superadmin users from accessing the application!\n\nThis action cannot be undone.');">
+                    🗑️ Revoke License
+                </button>
+            </form>
+        </div>
+    </div>
+    {% else %}
+    <div style="padding: 24px; background: #ffebee; border-left: 4px solid #f44336; border-radius: 6px; margin-bottom: 24px;">
+        <strong style="color: #c62828;">⚠️ No Active License</strong>
+        <p style="margin: 8px 0 0 0; color: #d32f2f;">
+            No application license has been generated. Non-superadmin users will not be able to access the application.
+        </p>
+    </div>
+    {% endif %}
+    
+    <h3>🔑 Generate New License</h3>
+    <form id="license-form" method="POST" action="/generate_app_license" class="qz-form-group">
+        <div class="form-row">
+            <div class="form-field">
+                <label for="license_validity_days">License Validity Period:</label>
+                <select id="license_validity_days" name="validity_days">
+                    <option value="30">30 Days (1 Month)</option>
+                    <option value="90">90 Days (3 Months)</option>
+                    <option value="180">180 Days (6 Months)</option>
+                    <option value="365" selected>365 Days (1 Year)</option>
+                    <option value="730">730 Days (2 Years)</option>
+                    <option value="1825">1825 Days (5 Years)</option>
+                    <option value="3650">3650 Days (10 Years)</option>
+                </select>
+            </div>
+            
+            <button type="submit" onclick="return confirm('{% if license_data %}This will replace the existing license key.\n\n{% endif %}Are you sure you want to generate a new application license?');">
+                🔑 Generate License Key
+            </button>
+        </div>
+    </form>
+    
+    <div style="margin-top: 24px; padding: 16px; background: var(--info-bg, #e3f2fd); border-left: 4px solid #2196f3; border-radius: 6px;">
+        <strong style="color: var(--info-text, #0d47a1);">ℹ️ License Information</strong>
+        <ul style="margin: 8px 0 0 0; color: var(--info-text, #1565c0); font-size: 0.9em;">
+            <li>The application license controls access for all non-superadmin users</li>
+            <li>Superadmin accounts can always access the application regardless of license status</li>
+            <li>When the license expires, non-superadmin users will see an expiration message</li>
+            <li>Generating a new license will replace any existing license</li>
+        </ul>
+    </div>
+</div>
+
 <script>
 function deletePairingKey(pairingKey, printerName) {
     if (confirm(`Are you sure you want to delete the pairing key for "${printerName}"?\n\nKey: ${pairingKey}\n\nThis action cannot be undone.`)) {