fix: add missing 't' to export function pasteMode

[dingyang435]

Summary

Fixes a typo in packages/app/src/components/prompt-input/paste.ts where �xpor function pasteMode was missing the letter 't', causing the paste functionality to not work properly.

Before

�xpor function pasteMode(text: string) {

After

�xport function pasteMode(text: string) {

This typo prevented the pasteMode function from being exported, breaking the paste feature in the prompt input component.

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