fix(windows): restore ENABLE_WINDOW_INPUT console flag after enable_raw_mode for IME support

crates/tui/src/tui/ui.rs

@@ -24,6 +24,7 @@ use crossterm::{
 use crossterm::event::{
     KeyboardEnhancementFlags, PopKeyboardEnhancementFlags, PushKeyboardEnhancementFlags,
 };
+#[cfg(target_os = "windows")]
 use ratatui::{
     Frame, Terminal,
     layout::{Constraint, Direction, Layout, Rect, Size},
@@ -32,6 +33,8 @@ use ratatui::{
     widgets::Block,
 };
 use tracing;
+#[cfg(target_os = "windows")]
+use windows::Win32::System::Console::{GetConsoleMode, GetStdHandle, SetConsoleMode};
 
 use crate::audit::log_sensitive_event;
 use crate::automation_manager::{AutomationManager, AutomationSchedulerConfig, spawn_scheduler};
@@ -280,6 +283,9 @@ pub async fn run_tui(config: &Config, options: TuiOptions) -> Result<()> {
         }
     }
 
+    #[cfg(target_os = "windows")]
+    enable_windows_ime_console_mode();
+
     let mut stdout = io::stdout();
     if use_alt_screen {
         execute!(stdout, EnterAlternateScreen)?;
@@ -7042,6 +7048,36 @@ pub fn emergency_restore_terminal() {
     let _ = execute!(stdout, LeaveAlternateScreen);
 }
 
+/// On Windows, ensure the console input handle has `ENABLE_WINDOW_INPUT`
+/// (0x0008) set. crossterm's `enable_raw_mode()` removes this flag, which
+/// breaks IME composition (Chinese/Japanese/Korean input methods cannot
+/// commit characters) on some Windows configurations (e.g. Windows Terminal
+/// in conhost compatibility mode, or the legacy console with VT input).
+///
+/// Best-effort and idempotent. Silently ignored if the console handle or
+/// mode query fails.
+#[cfg(target_os = "windows")]
+fn enable_windows_ime_console_mode() {
+    use windows::Win32::System::Console::CONSOLE_MODE;
+    const ENABLE_WINDOW_INPUT: CONSOLE_MODE = CONSOLE_MODE(0x0008);
+
+    // SAFETY: Win32 console API is safe to call from any thread.
+    // Failures (console handle invalid, mode query fails) are silently
+    // ignored — this is a best-effort IME compatibility tweak.
+    unsafe {
+        let Ok(handle) = GetStdHandle(windows::Win32::System::Console::STD_INPUT_HANDLE) else {
+            return;
+        };
+        let mut mode = CONSOLE_MODE(0);
+        if GetConsoleMode(handle, &mut mode).is_err() {
+            return;
+        }
+        if mode.0 & ENABLE_WINDOW_INPUT.0 == 0 {
+            let _ = SetConsoleMode(handle, mode | ENABLE_WINDOW_INPUT);
+        }
+    }
+}
+
 /// Re-establish terminal mode flags. Idempotent and best-effort: each
 /// underlying flag is silently discarded by terminals that don't support
 /// it, and a single flag's failure doesn't prevent later flags from being
@@ -7066,6 +7102,9 @@ fn recover_terminal_modes<W: Write>(
     use_mouse_capture: bool,
     use_bracketed_paste: bool,
 ) {
+    #[cfg(target_os = "windows")]
+    enable_windows_ime_console_mode();
+
     push_keyboard_enhancement_flags(writer);
     if use_mouse_capture && let Err(err) = execute!(writer, EnableMouseCapture) {
         tracing::debug!(?err, "EnableMouseCapture ignored");