refactor(coordinator): 合并 take_*_combo_hotkey_on_main_thread 三处复制

combo_hotkey / translation_hotkey / coding_agent_combo_hotkey 三个
take_*_on_main_thread 的主线程释放（issue #118）marshaling 体逐字相同，仅
take 字段不同。抽出共享 take_combo_monitor_on_main_thread(inner, slot)，
slot 闭包按 &Arc<Inner> 取回对应 Mutex<Option<ComboHotkeyMonitor>> 字段，
三处改为薄封装。action_hotkey 类已用 action_hotkey_slot 单独泛化，不动。
语义不变。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

openless-all/app/src-tauri/src/coordinator/hotkey_supervisors.rs

@@ -593,28 +593,33 @@ pub(crate) fn switch_to_previous_style(inner: &Arc<Inner>) {
     }
 }
 
-pub(crate) fn take_combo_hotkey_on_main_thread(inner: &Arc<Inner>) {
+/// 在主线程上 `.take()` 一个 combo 监听槽。
+///
+/// 这三类 combo 热键（combo / translation / coding-agent）的「拿 app → 有则
+/// `run_on_main_thread` 里 take，无则直接 take」marshaling 语义逐字相同，只是 take
+/// 的字段不同（issue #118：监听器必须在主线程释放）。`slot` 闭包按 `&Arc<Inner>`
+/// 取回对应字段，消除三处复制。`action_hotkey` 类已用 `action_hotkey_slot` 单独泛化。
+pub(crate) fn take_combo_monitor_on_main_thread(
+    inner: &Arc<Inner>,
+    slot: impl Fn(&Arc<Inner>) -> &Mutex<Option<ComboHotkeyMonitor>> + Send + 'static,
+) {
     let app = inner.app.lock().clone();
     if let Some(app) = app {
         let inner = Arc::clone(inner);
         let _ = app.run_on_main_thread(move || {
-            inner.combo_hotkey.lock().take();
+            slot(&inner).lock().take();
         });
     } else {
-        inner.combo_hotkey.lock().take();
+        slot(inner).lock().take();
     }
 }
 
+pub(crate) fn take_combo_hotkey_on_main_thread(inner: &Arc<Inner>) {
+    take_combo_monitor_on_main_thread(inner, |inner| &inner.combo_hotkey);
+}
+
 pub(crate) fn take_translation_hotkey_on_main_thread(inner: &Arc<Inner>) {
-    let app = inner.app.lock().clone();
-    if let Some(app) = app {
-        let inner = Arc::clone(inner);
-        let _ = app.run_on_main_thread(move || {
-            inner.translation_hotkey.lock().take();
-        });
-    } else {
-        inner.translation_hotkey.lock().take();
-    }
+    take_combo_monitor_on_main_thread(inner, |inner| &inner.translation_hotkey);
 }
 
 pub(crate) fn take_action_hotkey_on_main_thread(inner: &Arc<Inner>, kind: ActionHotkeyKind) {

openless-all/app/src-tauri/src/coordinator/voice_agent_hotkeys.rs

@@ -237,15 +237,7 @@ pub(crate) fn take_coding_agent_hotkeys_on_main_thread(inner: &Arc<Inner>) {
 }
 
 pub(crate) fn take_coding_agent_combo_hotkey_on_main_thread(inner: &Arc<Inner>) {
-    let app = inner.app.lock().clone();
-    if let Some(app) = app {
-        let inner = Arc::clone(inner);
-        let _ = app.run_on_main_thread(move || {
-            inner.coding_agent_combo_hotkey.lock().take();
-        });
-    } else {
-        inner.coding_agent_combo_hotkey.lock().take();
-    }
+    take_combo_monitor_on_main_thread(inner, |inner| &inner.coding_agent_combo_hotkey);
 }
 
 /// 快取用：抓当前选中文本 → Claude 润色 → 回插（替换选区）。全程胶囊反馈。