fix(chat): add history loading skeletons

src/components/chat/AgentHistoryPanel.tsx

@@ -13,6 +13,7 @@ import {
   Divider,
   IconButton,
   Paper,
+  Skeleton,
   Stack,
   TextField,
   Tooltip,
@@ -34,9 +35,11 @@ type AgentHistoryPanelProps = {
   sessions: ChatSessionSummary[];
   activeSessionId?: string;
   isHydrating?: boolean;
+  isLoadingSessions?: boolean;
+  loadingSessionId?: string;
   onNewSession: () => void;
   onRenameSession: (sessionId: string, title: string) => void;
-  onSelectSession: (sessionId: string) => void;
+  onSelectSession: (sessionId: string, title: string) => void;
   onDeleteSession: (sessionId: string) => void;
 };
 
@@ -76,6 +79,8 @@ export const AgentHistoryPanel = ({
   sessions,
   activeSessionId,
   isHydrating = false,
+  isLoadingSessions = false,
+  loadingSessionId,
   onNewSession,
   onRenameSession,
   onSelectSession,
@@ -127,6 +132,30 @@ export const AgentHistoryPanel = ({
     (session) => session.id === pendingDeleteSessionId,
   );
 
+  const renderSessionListSkeleton = () => (
+    <Stack spacing={1} aria-label="正在加载历史会话">
+      {Array.from({ length: 6 }, (_, index) => (
+        <Paper
+          key={index}
+          elevation={0}
+          sx={{
+            px: 1.25,
+            py: 1,
+            borderRadius: 3,
+            bgcolor: alpha("#fff", 0.48),
+            border: `1px solid ${alpha("#fff", 0.68)}`,
+            boxShadow: `0 4px 12px ${alpha("#000", 0.025)}`,
+          }}
+        >
+          <Stack spacing={0.75} sx={{ minHeight: 46, justifyContent: "center" }}>
+            <Skeleton variant="text" width={`${72 - (index % 3) * 12}%`} height={18} />
+            <Skeleton variant="text" width="32%" height={14} />
+          </Stack>
+        </Paper>
+      ))}
+    </Stack>
+  );
+
   const handleStartRename = (sessionId: string, title: string) => {
     setEditingSessionId(sessionId);
     setDraftTitle(title);
@@ -215,7 +244,9 @@ export const AgentHistoryPanel = ({
         <Divider sx={{ borderColor: alpha("#fff", 0.6) }} />
 
         <Box sx={{ flex: 1, overflowY: "auto", px: 1.25, py: 1.25 }}>
-          {sessions.length === 0 ? (
+          {isLoadingSessions ? (
+            renderSessionListSkeleton()
+          ) : sessions.length === 0 ? (
             <Stack
               alignItems="center"
               justifyContent="center"
@@ -271,27 +302,42 @@ export const AgentHistoryPanel = ({
                   <Stack spacing={1}>
                     {groupSessions.map((session) => {
                       const isActive = session.id === activeSessionId;
+                      const isLoading = session.id === loadingSessionId;
 
                       return (
                         <Paper
                           key={session.id}
                           elevation={0}
+                          aria-label={isLoading ? `正在加载会话 ${session.title}` : undefined}
                           onClick={() => {
-                            if (editingSessionId === session.id) return;
-                            onSelectSession(session.id);
+                            if (editingSessionId === session.id || isLoading) return;
+                            onSelectSession(session.id, session.title);
                           }}
                           sx={{
                             px: 1.25,
                             py: 1,
                             borderRadius: 3,
-                            cursor: isHydrating ? "default" : "pointer",
-                            bgcolor: isActive ? alpha("#00acc1", 0.12) : alpha("#fff", 0.56),
-                            border: `1px solid ${isActive ? alpha("#00acc1", 0.25) : alpha("#fff", 0.72)}`,
-                            boxShadow: isActive ? `0 8px 20px ${alpha("#00acc1", 0.12)}` : `0 4px 12px ${alpha("#000", 0.03)}`,
+                            cursor: isHydrating || isLoading ? "default" : "pointer",
+                            bgcolor:
+                              isActive || isLoading
+                                ? alpha("#00acc1", 0.12)
+                                : alpha("#fff", 0.56),
+                            border: `1px solid ${
+                              isActive || isLoading
+                                ? alpha("#00acc1", 0.25)
+                                : alpha("#fff", 0.72)
+                            }`,
+                            boxShadow:
+                              isActive || isLoading
+                                ? `0 8px 20px ${alpha("#00acc1", 0.12)}`
+                                : `0 4px 12px ${alpha("#000", 0.03)}`,
                             transition: "all 0.2s ease",
-                            pointerEvents: isHydrating ? "none" : "auto",
+                            pointerEvents: isHydrating || isLoading ? "none" : "auto",
                             "&:hover": {
-                              bgcolor: isActive ? alpha("#00acc1", 0.14) : alpha("#fff", 0.86),
+                              bgcolor:
+                                isActive || isLoading
+                                  ? alpha("#00acc1", 0.14)
+                                  : alpha("#fff", 0.86),
                               borderColor: alpha("#00acc1", 0.2),
                             },
                           }}
@@ -382,6 +428,11 @@ export const AgentHistoryPanel = ({
                                     <CloseRounded sx={{ fontSize: 16 }} />
                                   </IconButton>
                                 </Stack>
+                              ) : isLoading ? (
+                                <Box sx={{ minHeight: 46, display: "flex", flexDirection: "column", justifyContent: "center" }}>
+                                  <Skeleton variant="text" width="74%" height={18} />
+                                  <Skeleton variant="text" width="34%" height={14} sx={{ mt: 0.5 }} />
+                                </Box>
                               ) : pendingDeleteSessionId === session.id ? (
                                 <Stack direction="row" spacing={0.75} alignItems="center" sx={{ minHeight: 46 }}>
                                   <Box
@@ -437,7 +488,7 @@ export const AgentHistoryPanel = ({
                               )}
                             </Box>
 
-                            {!(editingSessionId === session.id || pendingDeleteSessionId === session.id) && (
+                            {!(editingSessionId === session.id || pendingDeleteSessionId === session.id || isLoading) && (
                               <Stack direction="row" spacing={0.25}>
                                 <Tooltip title="修改会话标题">
                                 <span>