diff --git a/.DS_Store b/.DS_Store
index 38e3655..b1b4307 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/dist.zip b/dist.zip
deleted file mode 100644
index c7314ce..0000000
Binary files a/dist.zip and /dev/null differ
diff --git a/src/components/MindMap.jsx b/src/components/MindMap.jsx
index a459e22..53a89ac 100644
--- a/src/components/MindMap.jsx
+++ b/src/components/MindMap.jsx
@@ -144,11 +144,11 @@ const MindMap = ({ content, title }) => {
 
     try {
       const processedMarkdown = preprocessMarkdownForMindMap(markdown, title);
-      console.log('=== 思维导图数据调试 ===');
-      console.log('原始markdown内容:');
-      console.log(markdown);
-      console.log('预处理后的markdown:');
-      console.log(processedMarkdown);
+      // console.log('=== 思维导图数据调试 ===');
+      // console.log('原始markdown内容:');
+      // console.log(markdown);
+      // console.log('预处理后的markdown:');
+      // console.log(processedMarkdown);
 
       const transformer = new Transformer();
       const { root } = transformer.transform(processedMarkdown);
@@ -161,10 +161,20 @@ const MindMap = ({ content, title }) => {
 
       markmapRef.current.fit();
 
-      // 延迟一下再次调用fit，确保内容完全渲染
+      // 延迟一下再次调用fit并放大，确保内容完全渲染
       setTimeout(() => {
         if (markmapRef.current) {
           markmapRef.current.fit();
+          // 在fit之后，再放大1.8倍以获得更好的可读性
+          try {
+            const { state } = markmapRef.current;
+            if (state) {
+              const currentScale = state.transform.k;
+              markmapRef.current.rescale(currentScale * 1.8);
+            }
+          } catch (e) {
+            console.log('缩放调整失败:', e);
+          }
         }
       }, 500);
 
diff --git a/src/pages/KnowledgeBasePage.css b/src/pages/KnowledgeBasePage.css
index f02f2f0..3f252ad 100644
--- a/src/pages/KnowledgeBasePage.css
+++ b/src/pages/KnowledgeBasePage.css
@@ -93,8 +93,6 @@
   padding: 0.5rem;
   border: none;
   border-radius: 6px;
-  background: #f1f5f9;
-  color: #64748b;
   cursor: pointer;
   transition: all 0.2s ease;
   display: flex;
@@ -102,9 +100,20 @@
   justify-content: center;
 }
 
+.btn-new-kb {
+  background: #667eea;
+  color: white;
+}
+
 .btn-new-kb:hover {
-  background: #e2e8f0;
-  color: #667eea;
+  background: #5568d3;
+  transform: translateY(-1px);
+  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
+}
+
+.btn-toggle-sidebar {
+  background: #f1f5f9;
+  color: #64748b;
 }
 
 .btn-toggle-sidebar:hover {
@@ -119,6 +128,27 @@
   padding: 0.5rem;
 }
 
+/* 日期分组 */
+.kb-date-group {
+  margin-bottom: 1rem;
+}
+
+.date-group-header {
+  padding: 0.5rem 0.75rem;
+  margin: 0.5rem 0;
+  font-size: 0.75rem;
+  font-weight: 600;
+  color: #64748b;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  border-bottom: 1px solid #e2e8f0;
+  background: #f8fafc;
+  border-radius: 6px;
+  position: sticky;
+  top: 0;
+  z-index: 10;
+}
+
 .kb-list-item {
   padding: 1rem;
   margin-bottom: 0.5rem;
@@ -627,13 +657,25 @@
   width: 18px;
   height: 18px;
   cursor: pointer;
+  flex-shrink: 0;
 }
 
-.meeting-item label {
-  cursor: pointer;
+.meeting-item-content {
   flex: 1;
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+
+.meeting-item-title {
   font-size: 0.95rem;
   color: #475569;
+  font-weight: 500;
+}
+
+.meeting-item-creator {
+  font-size: 0.8rem;
+  color: #94a3b8;
 }
 
 .selected-meetings-info {
diff --git a/src/pages/KnowledgeBasePage.jsx b/src/pages/KnowledgeBasePage.jsx
index 98a98d8..5225eb4 100644
--- a/src/pages/KnowledgeBasePage.jsx
+++ b/src/pages/KnowledgeBasePage.jsx
@@ -74,10 +74,14 @@ const KnowledgeBasePage = ({ user }) => {
     // 获取所有知识库（个人和共享）
     apiClient.get(buildApiUrl(API_ENDPOINTS.KNOWLEDGE_BASE.LIST))
       .then(response => {
-        setKbs(response.data.kbs);
+        // 按创建时间倒序排序
+        const sortedKbs = response.data.kbs.sort((a, b) =>
+          new Date(b.created_at) - new Date(a.created_at)
+        );
+        setKbs(sortedKbs);
         // 如果有知识库且没有选中，默认选中第一个
-        if (response.data.kbs.length > 0 && !selectedKb) {
-          loadKbDetail(response.data.kbs[0].kb_id);
+        if (sortedKbs.length > 0 && !selectedKb) {
+          loadKbDetail(sortedKbs[0].kb_id);
         }
         setLoading(false);
       })
@@ -177,6 +181,45 @@ const KnowledgeBasePage = ({ user }) => {
     });
   };
 
+  const formatTime = (dateString) => {
+    const date = new Date(dateString);
+    return date.toLocaleTimeString('zh-CN', {
+      hour: '2-digit',
+      minute: '2-digit'
+    });
+  };
+
+  const formatShortDate = (dateString) => {
+    const date = new Date(dateString);
+    return date.toLocaleDateString('zh-CN', {
+      month: 'numeric',
+      day: 'numeric'
+    });
+  };
+
+  const isToday = (dateString) => {
+    const date = new Date(dateString);
+    const today = new Date();
+    return date.getDate() === today.getDate() &&
+      date.getMonth() === today.getMonth() &&
+      date.getFullYear() === today.getFullYear();
+  };
+
+  const groupKbsByDate = (kbList) => {
+    const todayKbs = [];
+    const pastKbs = [];
+
+    kbList.forEach(kb => {
+      if (isToday(kb.created_at)) {
+        todayKbs.push(kb);
+      } else {
+        pastKbs.push(kb);
+      }
+    });
+
+    return { todayKbs, pastKbs };
+  };
+
   const handleLogoClick = () => {
     navigate('/dashboard');
   };
@@ -445,51 +488,110 @@ const KnowledgeBasePage = ({ user }) => {
                   <p>暂无知识库条目</p>
                 </div>
               ) : (
-                kbs.map(kb => (
-                  <div
-                    key={kb.kb_id}
-                    className={`kb-list-item ${selectedKb && selectedKb.kb_id === kb.kb_id ? 'active' : ''}`}
-                    onClick={() => handleKbSelect(kb)}
-                  >
-                    <div className="kb-list-item-header">
-                      <h3>{kb.title}</h3>
-                      {isCreator && (
-                        <div className="kb-item-actions">
-                          <button
-                            className="btn-edit-kb"
-                            onClick={(e) => {
-                              e.stopPropagation();
-                              navigate(`/knowledge-base/edit/${kb.kb_id}`);
-                            }}
-                            title="编辑"
-                          >
-                            <Edit size={14} />
-                          </button>
-                          <button
-                            className="btn-delete-kb"
-                            onClick={(e) => {
-                              e.stopPropagation();
-                              handleDelete(kb);
-                            }}
-                            title="删除"
-                          >
-                            <Trash2 size={14} />
-                          </button>
+                (() => {
+                  const { todayKbs, pastKbs } = groupKbsByDate(kbs);
+                  return (
+                    <>
+                      {/* 今天的知识库 */}
+                      {todayKbs.length > 0 && (
+                        <div className="kb-date-group">
+                          <div className="date-group-header">今天</div>
+                          {todayKbs.map(kb => (
+                            <div
+                              key={kb.kb_id}
+                              className={`kb-list-item ${selectedKb && selectedKb.kb_id === kb.kb_id ? 'active' : ''}`}
+                              onClick={() => handleKbSelect(kb)}
+                            >
+                              <div className="kb-list-item-header">
+                                <h3>{kb.title}</h3>
+                                {String(kb.creator_id) === String(user.user_id) && (
+                                  <div className="kb-item-actions">
+                                    <button
+                                      className="btn-edit-kb"
+                                      onClick={(e) => {
+                                        e.stopPropagation();
+                                        navigate(`/knowledge-base/edit/${kb.kb_id}`);
+                                      }}
+                                      title="编辑"
+                                    >
+                                      <Edit size={14} />
+                                    </button>
+                                    <button
+                                      className="btn-delete-kb"
+                                      onClick={(e) => {
+                                        e.stopPropagation();
+                                        handleDelete(kb);
+                                      }}
+                                      title="删除"
+                                    >
+                                      <Trash2 size={14} />
+                                    </button>
+                                  </div>
+                                )}
+                              </div>
+                              <div className="kb-list-item-meta">
+                                <span className="meta-time">{formatTime(kb.created_at)}</span>
+                                <span className="meta-item">
+                                  <Database size={12} />
+                                  {kb.source_meeting_count || 0} 个数据源
+                                </span>
+                              </div>
+                            </div>
+                          ))}
                         </div>
                       )}
-                    </div>
-                    <div className="kb-list-item-meta">
-                      <span className="meta-item">
-                        <Calendar size={12} />
-                        {formatDate(kb.created_at)}
-                      </span>
-                      <span className="meta-item">
-                        <Database size={12} />
-                        {kb.source_meeting_count || 0} 个数据源
-                      </span>
-                    </div>
-                  </div>
-                ))
+
+                      {/* 之前的知识库 */}
+                      {pastKbs.length > 0 && (
+                        <div className="kb-date-group">
+                          <div className="date-group-header">之前</div>
+                          {pastKbs.map(kb => (
+                            <div
+                              key={kb.kb_id}
+                              className={`kb-list-item ${selectedKb && selectedKb.kb_id === kb.kb_id ? 'active' : ''}`}
+                              onClick={() => handleKbSelect(kb)}
+                            >
+                              <div className="kb-list-item-header">
+                                <h3>{kb.title}</h3>
+                                {String(kb.creator_id) === String(user.user_id) && (
+                                  <div className="kb-item-actions">
+                                    <button
+                                      className="btn-edit-kb"
+                                      onClick={(e) => {
+                                        e.stopPropagation();
+                                        navigate(`/knowledge-base/edit/${kb.kb_id}`);
+                                      }}
+                                      title="编辑"
+                                    >
+                                      <Edit size={14} />
+                                    </button>
+                                    <button
+                                      className="btn-delete-kb"
+                                      onClick={(e) => {
+                                        e.stopPropagation();
+                                        handleDelete(kb);
+                                      }}
+                                      title="删除"
+                                    >
+                                      <Trash2 size={14} />
+                                    </button>
+                                  </div>
+                                )}
+                              </div>
+                              <div className="kb-list-item-meta">
+                                <span className="meta-date">{formatShortDate(kb.created_at)}</span>
+                                <span className="meta-item">
+                                  <Database size={12} />
+                                  {kb.source_meeting_count || 0} 个数据源
+                                </span>
+                              </div>
+                            </div>
+                          ))}
+                        </div>
+                      )}
+                    </>
+                  );
+                })()
               )}
             </div>
           )}
@@ -644,9 +746,18 @@ const KnowledgeBasePage = ({ user }) => {
                         <input
                           type="checkbox"
                           checked={selectedMeetings.includes(meeting.meeting_id)}
-                          onChange={() => toggleMeetingSelection(meeting.meeting_id)}
+                          onChange={(e) => {
+                            e.stopPropagation();
+                            toggleMeetingSelection(meeting.meeting_id);
+                          }}
+                          onClick={(e) => e.stopPropagation()}
                         />
-                        <label>{meeting.title}</label>
+                        <div className="meeting-item-content">
+                          <div className="meeting-item-title">{meeting.title}</div>
+                          {meeting.creator_username && (
+                            <div className="meeting-item-creator">创建人: {meeting.creator_username}</div>
+                          )}
+                        </div>
                       </div>
                     ))
                   )}
diff --git a/src/pages/MeetingDetails.jsx b/src/pages/MeetingDetails.jsx
index bb7867e..7eb0a89 100644
--- a/src/pages/MeetingDetails.jsx
+++ b/src/pages/MeetingDetails.jsx
@@ -6,7 +6,7 @@ import ReactMarkdown from 'react-markdown';
 import remarkGfm from 'remark-gfm';
 import rehypeRaw from 'rehype-raw';
 import rehypeSanitize from 'rehype-sanitize';
-import { buildApiUrl, API_ENDPOINTS } from '../config/api';
+import { buildApiUrl, API_ENDPOINTS, API_BASE_URL } from '../config/api';
 import ContentViewer from '../components/ContentViewer';
 import TagDisplay from '../components/TagDisplay';
 import { Tabs } from 'antd';