fix: enable thinking for zhipuai-coding-plan & prevent Korean IME truncation (#22041)

Co-authored-by: claudianus <claudianus@users.noreply.github.com>
Co-authored-by: Aiden Cline <aidenpcline@gmail.com>
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx

@@ -589,6 +589,13 @@ export function Prompt(props: PromptProps) {
   ])
 
   async function submit() {
+    // IME: double-defer may fire before onContentChange flushes the last
+    // composed character (e.g. Korean hangul) to the store, so read
+    // plainText directly and sync before any downstream reads.
+    if (input && !input.isDestroyed && input.plainText !== store.prompt.input) {
+      setStore("prompt", "input", input.plainText)
+      syncExtmarksWithPromptParts()
+    }
     if (props.disabled) return
     if (autocomplete?.visible) return
     if (!store.prompt.input) return
@@ -994,7 +1001,11 @@ export function Prompt(props: PromptProps) {
                     input.cursorOffset = input.plainText.length
                 }
               }}
-              onSubmit={submit}
+              onSubmit={() => {
+                // IME: double-defer so the last composed character (e.g. Korean
+                // hangul) is flushed to plainText before we read it for submission.
+                setTimeout(() => setTimeout(() => submit(), 0), 0)
+              }}
               onPaste={async (event: PasteEvent) => {
                 if (props.disabled) {
                   event.preventDefault()