feat(导航): 添加今日记录链接到侧边栏导航

添加今日记录页面链接到侧边栏导航菜单，与昨日记录和汇总记录并列显示

core/templates/core/base.html

@@ -453,6 +453,11 @@
                             <i class="bi bi-journal-text"></i><span>昨日记录</span>
                         </a>
                     </li>
+                    <li class="nav-item">
+                        <a class="nav-link {% if request.resolver_match.url_name == 'today_records' or 'add_today_reading' in request.path or 'edit_today_reading' in request.path or 'add_today_insight' in request.path or 'edit_today_insight' in request.path %}active{% endif %}" href="{% url 'today_records' %}">
+                            <i class="bi bi-journal-check"></i><span>今日记录</span>
+                        </a>
+                    </li>
                     <li class="nav-item">
                         <a class="nav-link {% if request.resolver_match.url_name == 'summaries' or 'add_summary' in request.path or 'edit_summary' in request.path %}active{% endif %}" href="{% url 'summaries' %}">
                             <i class="bi bi-collection"></i><span>汇总记录</span>