Refactor project dashboard and device list templates; add modals for editing projects and locations

- Updated project_dashboard.html to conditionally display NRLs or Locations based on project type, and added a button to open a modal for adding locations.
- Enhanced slm_device_list.html with a configuration button for each unit, allowing users to open a modal for device configuration.
- Modified detail.html to include an edit project modal with a form for updating project details, including client name, status, and dates.
- Improved sound_level_meters.html by restructuring the layout and adding a configuration modal for SLM devices.
- Implemented JavaScript functions for handling modal interactions, including opening, closing, and submitting forms for project and location management.

templates/partials/projects/assignment_list.html

@@ -0,0 +1,30 @@
+<!-- Project Assignments List -->
+{% if assignments %}
+    <div class="space-y-3">
+        {% for item in assignments %}
+            <div class="border border-gray-200 dark:border-gray-700 rounded-lg p-4">
+                <div class="flex items-start justify-between gap-3">
+                    <div>
+                        <p class="font-semibold text-gray-900 dark:text-white">{{ item.unit.id if item.unit else item.assignment.unit_id }}</p>
+                        {% if item.location %}
+                            <p class="text-xs text-gray-500 dark:text-gray-400 mt-1">Location: {{ item.location.name }}</p>
+                        {% endif %}
+                        <p class="text-xs text-gray-500 dark:text-gray-400 mt-1">
+                            Assigned: {% if item.assignment.assigned_at %}{{ item.assignment.assigned_at.strftime('%Y-%m-%d %H:%M') }}{% else %}Unknown{% endif %}
+                        </p>
+                    </div>
+                    <button onclick="unassignUnit('{{ item.assignment.id }}')" class="text-xs px-3 py-1 rounded-full bg-amber-100 text-amber-800 dark:bg-amber-900/30 dark:text-amber-300">
+                        Unassign
+                    </button>
+                </div>
+            </div>
+        {% endfor %}
+    </div>
+{% else %}
+    <div class="text-center py-8 text-gray-500 dark:text-gray-400">
+        <svg class="w-12 h-12 mx-auto mb-3 opacity-50" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M20 13V6a2 2 0 00-2-2H6a2 2 0 00-2 2v7m16 0v5a2 2 0 01-2 2H6a2 2 0 01-2-2v-5m16 0h-2.586a1 1 0 00-.707.293l-2.414 2.414a1 1 0 01-.707.293h-3.172a1 1 0 01-.707-.293l-2.414-2.414A1 1 0 006.586 13H4"></path>
+        </svg>
+        <p>No active assignments</p>
+    </div>
+{% endif %}