添加对话记录保存详细日志，诊断conversation_id传递问题

添加日志位置：
1. chat/index.tsx: 发送消息、接收会话ID变更、初始化读取localStorage
2. use-chat-message.ts: 发送消息、接收新会话ID、处理新会话
3. use-conversation.ts: setCurrConversationId保存到localStorage

帮助诊断为什么对话记录没有固定（每次都创建新会话）

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/hooks/use-conversation.ts

@@ -113,6 +113,13 @@ export default function useConversation() {
         isSetToLocalStorage = true,
         newConversationName = ''
     ) => {
+        console.log('💾 [useConversation] setCurrConversationId:', {
+            id,
+            appId,
+            isSetToLocalStorage,
+            willSaveToStorage: isSetToLocalStorage && id !== '-1'
+        });
+
         doSetCurrConversationId(id);
 
         if (isSetToLocalStorage && id !== '-1') {
@@ -128,8 +135,14 @@ export default function useConversation() {
 
                 globalThis.localStorage?.setItem(storageConversationIdKey, JSON.stringify(conversationIdInfo));
 
+                console.log('✅ [useConversation] 已保存到localStorage:', {
+                    appUrlKey,
+                    conversationId: id,
+                    allKeys: Object.keys(conversationIdInfo)
+                });
+
             } catch (error) {
-                console.error('保存会话ID到本地存储失败:', error);
+                console.error('❌ [useConversation] 保存会话ID到本地存储失败:', error);
             }
         }
     };