From 1a54217bfb66a242be7440af4630fa177ba9ae9c Mon Sep 17 00:00:00 2001
From: Teigen <teigenzhang@gmail.com>
Date: Mon, 15 Jun 2026 17:33:31 +0800
Subject: [PATCH] fix(mobile): don't clear textarea during compositionstart
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Programmatic _textarea.value = '' during compositionstart cancels the
active IME composition on iOS Safari, breaking Chinese character input.
The phantom (U+200B) is invisible and _strip() already removes it
before sending to PTY — no need to clear it manually.
---
 src/web/public/input-cjk.js | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/src/web/public/input-cjk.js b/src/web/public/input-cjk.js
index 72305c82..cb398548 100644
--- a/src/web/public/input-cjk.js
+++ b/src/web/public/input-cjk.js
@@ -113,11 +113,9 @@ const CjkInput = (() => {
       // ── Composition tracking ──
       _listeners.compositionstart = () => {
         _composing = true;
-        // Clear phantom so IME sees a clean textarea — some IMEs include
-        // existing text in the composition region which would corrupt input.
-        if (_textarea.value === PHANTOM) {
-          _textarea.value = '';
-        }
+        // Leave textarea.value untouched — programmatic changes during
+        // compositionstart cancel the IME composition on iOS Safari.
+        // The phantom (U+200B) is invisible and _strip() removes it on flush.
       };
       _listeners.compositionend = () => {
         _composing = false;