feat: Modularizes dashboard structure

Introduces DashboardSection class to encapsulate dashboard logic,
enabling easier extension and customization. Adds separate mood
and dreams dashboard templates to streamline content rendering.

Refactors main dashboard template to dynamically render content
from enabled modules using a new template tag system, improving
flexibility and maintainability.

frontend/classes.py

@@ -1,3 +1,6 @@
+from django.template.loader import render_to_string
+
+
 class NavSection:
     def __init__(self, name, order=100):
         self.name = name
@@ -16,22 +19,37 @@ class NavSection:
         self.items.sort(key=lambda x: x.order)
 
         for item in self.items:
-            html += """
+            html += (
+                """
             <!-- Nav Item -->
-            <li class="nav-item""" + (" active" if item.name == active else "") + f"""">
+            <li class="nav-item"""
+                + (" active" if item.name == active else "")
+                + f"""">
                 <a class="nav-link" href="{item.url}">
                     <i class="{item.icon}"></i>
                     <span>{item.name}</span>
                 </a>
             </li>
             """
+            )
 
         return html
 
+
 class NavItem:
     def __init__(self, name, url, icon="fas fa-fw fa-smile", title=None, order=100):
         self.name = name
         self.url = url
         self.icon = icon
         self.title = title or name
-        self.order = order
+        self.order = order
+
+
+class DashboardSection:
+    def __init__(self, name, template, context=None):
+        self.name = name
+        self.template = template
+        self.context = context or {}
+
+    def get_html(self, request):
+        return render_to_string(self.template, self.context, request)