fix(expo): 发送后延时 refocus 聊天输入框

发送会递增 inputResetKey 以 remount TextInput，需在下一帧再 focus 才能延续键盘输入。

Made-with: Cursor

app-expo/src/app/(main)/conversation/[id].tsx

@@ -1219,6 +1219,17 @@ export default function ConversationScreen() {
     }
   }, []);
 
+  /** 发送后 `inputResetKey` 会 remount TextInput，需下一帧再 focus 才能延续键盘输入 */
+  const scheduleRefocusComposer = useCallback(() => {
+    InteractionManager.runAfterInteractions(() => {
+      requestAnimationFrame(() => {
+        requestAnimationFrame(() => {
+          textInputRef.current?.focus();
+        });
+      });
+    });
+  }, []);
+
   const flattenedData = useMemo(
     () => flattenMessagesForList(messages ?? []),
     [messages],
@@ -1366,6 +1377,7 @@ export default function ConversationScreen() {
       pendingTextSendRef.current = text;
       setInput('');
       setInputResetKey((k) => k + 1);
+      scheduleRefocusComposer();
       clearConnectingSendTimeout();
       connectingSendTimeoutRef.current = setTimeout(() => {
         connectingSendTimeoutRef.current = null;
@@ -1379,6 +1391,7 @@ export default function ConversationScreen() {
     sendText(text);
     setInput('');
     setInputResetKey((k) => k + 1);
+    scheduleRefocusComposer();
   };
 
   /** 仅完全断开时禁用发送/语音；连接中可点发送（排队） */