diff --git a/architecture/notes/nebula_app/gpui_shell/2026-09-21-macos-command-key-aliases.md b/architecture/notes/nebula_app/gpui_shell/2026-09-21-macos-command-key-aliases.md
new file mode 100644
index 0000000..1055e1a
--- /dev/null
+++ b/architecture/notes/nebula_app/gpui_shell/2026-09-21-macos-command-key-aliases.md
@@ -0,0 +1,116 @@
+# macOS command-key aliases
+
+## Status
+
+Implemented for issue #238.
+
+## Context
+
+The GPUI shell registered a macOS ⌘ shortcut set that existed nowhere else.
+`bind_macos_command_keys` hand-wrote roughly two dozen bindings after
+`default_workspace_bindings`, while `display::keymap::default_shortcuts()` — the
+table that `clear_action` / `reset_action`, the settings keymap page and the
+keybind reload path read — knew nothing about them. Half of those keys also
+appear in the config macOS platform table (`config/bindings/defaults.rs`); the
+other half only existed in the shell.
+
+Two user-visible consequences followed. Clearing the Shell picker row wrote only
+`Ctrl+K:ReceiveChar`, so the static ⌘K binding kept consuming the key and the
+panel still opened. `Action::Quit`, declared for macOS as `"q", SUPER`, fell into
+the `_ => None` arm of `workspace_binding_in_context`, so ⌘Q did nothing at all
+(GPUI installs no application menu). The display layer also rendered the super
+modifier as `Win+`, so the settings page and the lines the app wrote into
+`pebrel_settings.txt` showed `Ctrl+Win+F` / `Win+F` on macOS.
+
+## Evidence
+
+- Issue #238 reproduction, with the settings file the released build wrote:
+  `keybind=Ctrl+Win+F:ReceiveChar`, `keybind=Ctrl+K:ReceiveChar`,
+  `keybind=shift+win+k:ReceiveChar` — the unbind persisted, yet ⌘K still opened
+  the picker.
+- `display::keymap` regressions (`clearing_releases_the_macos_command_alias`,
+  `macos_command_aliases_round_trip_through_storage`,
+  `super_modifier_renders_per_platform`) and shell regressions
+  (`every_macos_command_alias_binds_a_gpui_action`,
+  `released_cmd_k_is_swallowed_by_no_action`).
+- GPUI keymap semantics: a no-action binding for a keystroke suppresses matching
+  bindings from equal or weaker sources, and a keystroke with no remaining
+  binding falls through to the view's key handler — that is why a cleared ⌘ key
+  reaches the terminal instead of being eaten.
+- Manual acceptance on macOS 26 (arm64, debug build, window driven through
+  accessibility): default ⌘K opens the picker; clearing the row writes both
+  `Ctrl+K:ReceiveChar` and `cmd+k:ReceiveChar` and releases ⌘K and Ctrl+K without
+  a restart; restoring the row brings ⌘K back; ⌘Q quits with `clean_exit` true.
+
+## Decision
+
+`display::keymap::MACOS_COMMAND_ALIASES` is the single authority for the shell's
+⌘ set. `init()` derives the static gpui bindings from it, and
+`default_shortcuts()` adds it to the unbind/restore vocabulary on macOS, deduped
+against entries the config table already provides for the same action and key.
+The alias table writes `cmd+…` into `keybind=` lines. Existing files and shortcut
+capture can still use `win+…`, and manually edited files can use `super+…` or a
+different modifier order. The GPUI adapter parses and canonicalizes its binding
+strings before comparing overrides and restored defaults. Display spelling must
+not determine a shortcut's runtime identity.
+
+`Action::Quit` maps to a `QuitApp` action whose handler defers
+`windowing::quit_all`, the same path as tray quit, so ⌘Q saves the session and
+drafts before stopping PTYs. `mods_prefix` renders the super modifier per
+platform, which also corrects the spelling of lines the app writes.
+
+## Rejected alternatives
+
+- Showing the ⌘ aliases on the settings keymap page (reverse-looking-up the
+  alias table in `effective_combo`) changes about twenty keycaps on macOS, the
+  shadowing verdicts other rows derive from them, and needs its own visual
+  acceptance. The page keeps showing the config table's Ctrl key.
+- Moving the ⌘ set into the config macOS platform table would feed the legacy
+  terminal shell UI-only actions and keep the ⌘K collision, which the table
+  already resolves differently (`Esc("\x0c")` plus `ClearHistory`).
+- Comparing raw display/storage spellings fails for equivalent `Win+…`,
+  `Cmd+…` and `super+…` keys. Display text is not a canonical identity;
+  `Ctrl++`-style display spellings also do not parse back as storage strings.
+- Mapping the removed static ⌘ bindings to `ReceiveChar` from `init()` was not
+  needed: the user keybind table already injects the no-action binding.
+
+## Consequences
+
+- Cleared actions now also write `keybind=cmd+…:ReceiveChar` lines. Users coming
+  from an earlier build must clear the row once more, because their existing file
+  predates the alias vocabulary and holds no line for the ⌘ half.
+- The keymap page still shows Ctrl keys for actions whose macOS binding set
+  includes ⌘. Releasing them works; seeing them does not.
+- ⌘K after unbinding does not clear the screen. The GPUI shell has no
+  clear-screen action (`Action::Esc` and `Action::ClearHistory` are unmapped) and
+  the terminal encoder ignores pure ⌘ combinations, so the key is released but
+  inert. Out of scope here; `Ctrl+L` still passes through to the shell.
+- ⌘B and ⌘, stay static bindings: they have no editable keymap row, so there is
+  nothing to clear.
+
+## Validation
+
+`cargo fmt --all -- --check`, `python3 scripts/check_architecture.py --base
+f7ca0ec`, `python3 scripts/check_platform_cfg.py` (budget unchanged at 484) and
+the `display::keymap` / `keyboard_bindings` unit suites pass; the two new
+released-key tests fail without the change. Manual acceptance is listed under
+Evidence. The alias table is shared data; runtime registration uses the existing
+`Platform::current()` entry and remains macOS-only. The two macOS restore
+regressions remain platform-gated. This avoids duplicating platform compile
+branches in the UI adapter without increasing the current cfg budget.
+A cross-platform GPUI dispatch regression confirms that sharing the table does
+not register Command shortcuts on Windows/Linux.
+
+The 2026-09-23 review reproduced two restore failures through GPUI keyboard
+dispatch: recording Cmd+K then resetting the row, and resetting the old
+`Ctrl+Win+F:ReceiveChar` override from #238. Both failed before canonicalization.
+Regression coverage includes those paths and equivalent modifier spellings/order.
+
+## Supersedes
+
+None.
+
+## Revisit when
+
+The keymap page should show platform-native keycaps, or macOS ⌘K should be
+assigned to a clear-screen action instead of the Shell picker.
diff --git a/nebula_app/src/display/keymap.rs b/nebula_app/src/display/keymap.rs
index b7442e0..5b3cb37 100644
--- a/nebula_app/src/display/keymap.rs
+++ b/nebula_app/src/display/keymap.rs
@@ -88,6 +88,52 @@ pub(crate) const READONLY_ROWS: &[(&str, &str, &str)] = &[
     ("贴入 AI 修复建议", "Paste AI fix suggestion", "Ctrl+."),
 ];
 
+/// macOS 的 ⌘ 命令键别名：`(存储写法, 动作)`。
+///
+/// GPUI 壳在配置表之外**追加**一整套 ⌘ 绑定：配置表的 macOS 段只覆盖其中
+/// 一半，另一半（⌘K、⌘D、⌘⇧P…）是壳自己加的。这张表是那套绑定的唯一权威：
+/// `init()` 按它注册静态绑定，解绑与恢复按它写回 `keybind=` 行。留在表外
+/// 就成了影子绑定——`clear_action` 不知道它，于是出现「⌘K 解绑后仍然弹出
+/// Shell 选择器」（#238）。
+///
+/// 表里的写法会写进设置文件，超级键写 `cmd`（macOS 的读法）。历史配置和
+/// 录制结果仍可使用 `win` / `super`；GPUI 适配层按解析后的按键规范化，
+/// 覆盖与恢复默认不依赖这些别名或修饰键顺序的逐字相等。
+///
+/// 这张表只进 [`default_shortcuts`]（解绑/恢复口径），不进 `effective_combo`
+/// 的键帽反查：设置页仍按配置表的 Ctrl 键显示。
+///
+/// 别名表是共享数据；实际注册由平台层入口限定为 macOS，便于跨平台核验分派。
+pub(crate) const MACOS_COMMAND_ALIASES: &[(&str, Action)] = &[
+    ("cmd+t", Action::CreateNewTab),
+    ("cmd+n", Action::CreateNewWindow),
+    // ⌘W 关标签页是 GPUI 壳的实际行为；配置表的 macOS 段把 ⌘W 记作 Quit，
+    // 这里必须压过它，否则解绑恢复会把 ⌘W 还给退出。
+    ("cmd+w", Action::CloseTab),
+    ("shift+cmd+p", Action::ToggleCommandPalette),
+    ("cmd+k", Action::ToggleShellPicker),
+    ("shift+cmd+f", Action::ToggleFilesPanel),
+    ("cmd+d", Action::SplitRight),
+    ("shift+cmd+d", Action::SplitDown),
+    ("shift+cmd+enter", Action::ToggleZoom),
+    ("alt+cmd+left", Action::FocusPaneLeft),
+    ("alt+cmd+right", Action::FocusPaneRight),
+    ("alt+cmd+up", Action::FocusPaneUp),
+    ("alt+cmd+down", Action::FocusPaneDown),
+    ("shift+cmd+]", Action::SelectNextTab),
+    ("shift+cmd+[", Action::SelectPreviousTab),
+    ("shift+cmd+g", Action::ToggleGitPanel),
+    ("cmd+plus", Action::IncreaseFontSize),
+    ("cmd+=", Action::IncreaseFontSize),
+    ("cmd+minus", Action::DecreaseFontSize),
+    ("cmd+digit0", Action::ResetFontSize),
+    ("cmd+c", Action::Copy),
+    ("cmd+v", Action::Paste),
+    ("ctrl+cmd+f", Action::ToggleFullscreen),
+    ("shift+cmd+o", Action::OpenQuickJump),
+    ("cmd+q", Action::Quit),
+];
+
 pub(crate) fn action_label(
     row: &(Action, &'static str, &'static str),
     language: super::UiLanguage,
@@ -118,13 +164,33 @@ fn cached_defaults() -> &'static [KeyBinding] {
 }
 
 pub(crate) fn default_shortcuts() -> Vec<(String, Action)> {
-    cached_defaults()
+    let mut shortcuts: Vec<(String, Action)> = cached_defaults()
         .iter()
         .filter_map(|binding| {
             display_combo(binding.mods, &binding.trigger)
                 .map(|combo| (combo, binding.action.clone()))
         })
-        .collect()
+        .collect();
+    // macOS 的 ⌘ 键也算默认键：`clear_action` / `reset_action` 按这份表决定要
+    // 解掉、要还回哪些键，不带上它就会漏掉 ⌘ 那一半（#238）。
+    #[cfg(target_os = "macos")]
+    {
+        let mut extra: Vec<(String, Action)> = Vec::new();
+        for (combo, action) in MACOS_COMMAND_ALIASES {
+            let parsed = parse_combo(combo);
+            // 配置表已经给了同一动作的同一个键（⌘T、⌘C、⌘Q…）就不重复追加：
+            // 解绑会把每条 combo 都写进设置文件，重复条目只会多留一行废话。
+            let covered = shortcuts
+                .iter()
+                .chain(extra.iter())
+                .any(|(known, candidate)| candidate == action && parse_combo(known) == parsed);
+            if !covered {
+                extra.push(((*combo).to_owned(), action.clone()));
+            }
+        }
+        shortcuts.extend(extra);
+    }
+    shortcuts
 }
 
 /// Editing one action moves its shortcut: old keys pass through to the terminal.
@@ -335,7 +401,10 @@ pub(crate) fn mods_prefix(mods: ModifiersState) -> String {
         out.push_str("Alt+");
     }
     if mods.super_key() {
-        out.push_str("Win+");
+        // macOS 的超级键是 ⌘。键帽必须写 Cmd+，否则设置页会出现
+        // `Ctrl+Win+F`（全屏）、`Win+F`（搜索）这类用户认不出的组合（#238）。
+        // 存储侧不受影响：`win+` / `super+` / `cmd+` 同等解析。
+        out.push_str(if cfg!(target_os = "macos") { "Cmd+" } else { "Win+" });
     }
     out
 }
@@ -805,4 +874,62 @@ mod tests {
             );
         }
     }
+
+    /// 超级键键帽随平台渲染：macOS 是 ⌘，其它平台是 Win。
+    #[test]
+    fn super_modifier_renders_per_platform() {
+        let expected = if cfg!(target_os = "macos") { "Cmd+" } else { "Win+" };
+        assert_eq!(mods_prefix(ModifiersState::SUPER), expected);
+        assert_eq!(
+            mods_prefix(ModifiersState::CONTROL | ModifiersState::SUPER),
+            format!("Ctrl+{expected}")
+        );
+    }
+
+    /// 别名条目要能在存储格式里往返：`clear_action` 把表里的写法逐字写进
+    /// 设置文件，解析层必须读回同一个组合。
+    #[cfg(target_os = "macos")]
+    #[test]
+    fn macos_command_aliases_round_trip_through_storage() {
+        for (combo, _) in MACOS_COMMAND_ALIASES {
+            let (mods, key) = parse_combo(combo).unwrap_or_else(|| panic!("{combo} 解析失败"));
+            assert!(mods.super_key(), "{combo} 必须是 ⌘ 组合");
+            let canonical =
+                canonical_combo(mods, &key).unwrap_or_else(|| panic!("{combo} 无法写成存储格式"));
+            assert_eq!(parse_combo(&canonical), Some((mods, key)), "{combo} 存储往返不一致");
+        }
+    }
+
+    /// #238：macOS 上 Shell 选择器除了配置表的 Ctrl+K 还有一条壳自带的
+    /// ⌘K。解绑必须把两条都解掉，否则静态默认绑定继续抢键，用户看到的就是
+    /// 「解绑了但 ⌘K 照样弹面板」。
+    #[cfg(target_os = "macos")]
+    #[test]
+    fn clearing_releases_the_macos_command_alias() {
+        let action = Action::ToggleShellPicker;
+        // 设置页仍按配置表的 Ctrl+K 展示：别名只进解绑口径，不进键帽反查。
+        assert_eq!(effective_combo(&action, &[]), Some(("Ctrl+K".to_owned(), false)));
+        let mut raw = Vec::new();
+        clear_action(&mut raw, &action);
+        // 解绑使用表里的写法；旧配置和录制结果的等价拼写由 GPUI 层规范化。
+        assert!(
+            raw.iter().any(|(combo, _)| combo == "cmd+k"),
+            "⌘K 必须按表里的写法逐字写回，实际 {raw:?}"
+        );
+        // Ctrl+K 来自配置表、⌘K 来自别名表，两条都要落成 ReceiveChar。
+        for combo in ["ctrl+k", "cmd+k"] {
+            let parsed = parse_combo(combo);
+            assert!(
+                raw.iter().any(|(candidate, name)| parse_combo(candidate) == parsed
+                    && parse_action(name) == Some(Action::ReceiveChar)),
+                "{combo} 必须落成 ReceiveChar，否则运行时解不掉静态默认绑定"
+            );
+        }
+        assert_eq!(effective_combo(&action, &build_bindings(&raw)), None, "解绑后不应再有有效键");
+        reset_action(&mut raw, &action);
+        assert!(
+            effective_combo(&action, &build_bindings(&raw)).is_some(),
+            "恢复要把两组默认键都还回来"
+        );
+    }
 }
diff --git a/nebula_app/src/gpui_shell/workspace/keyboard_bindings.rs b/nebula_app/src/gpui_shell/workspace/keyboard_bindings.rs
index 1ccd710..f1ce80d 100644
--- a/nebula_app/src/gpui_shell/workspace/keyboard_bindings.rs
+++ b/nebula_app/src/gpui_shell/workspace/keyboard_bindings.rs
@@ -44,22 +44,30 @@ pub(super) const STATIC_DEFAULT_COMBOS: &[&str] = &[
 /// 存储格式 combo（`ctrl+shift+t`）→ gpui 绑定串（`ctrl-shift-t`）。键名
 /// 两套体系同构（小写命名键 + 单字符）；digitN 折回数字，plus/minus 折回
 /// `+`/`-`（`+` 是存储分隔符，必须先占位再替换）。
+/// 最后由 GPUI 解析并规范化修饰键别名和顺序，保证旧 Win+、新 Cmd+ 和
+/// 录制结果在覆盖/恢复默认时具有同一个运行时身份。
 pub(super) fn gpui_binding_combo(combo: &str) -> String {
-    combo
+    let combo = combo
         .to_ascii_lowercase()
         .replace("plus", "\u{1}")
         .replace("minus", "\u{2}")
         .replace('+', "-")
         .replace("digit", "")
         .replace('\u{1}', "+")
-        .replace('\u{2}', "-")
+        .replace('\u{2}', "-");
+    gpui::Keystroke::parse(&combo).map(|key| key.unparse()).unwrap_or(combo)
 }
 
 /// 注册工作区快捷键；在 `gpui_component::init` 之后调用一次。
 pub(super) fn init(cx: &mut App) {
     cx.bind_keys(default_workspace_bindings());
-    #[cfg(target_os = "macos")]
-    bind_macos_command_keys(cx);
+    // 平台判定复用已有入口；共享表不意味着给其他平台注册 ⌘ 快捷键。
+    if crate::platform::Platform::current() == crate::platform::Platform::MacOS {
+        bind_macos_command_keys(cx);
+    }
+    // 退出不属于任何视图，挂全局兜底：⌘Q 与用户自定义的 `keybind=…:Quit`
+    // 都落到与托盘退出同一条「先落盘会话与草稿，再停 PTY」的路径。
+    cx.on_action(|_: &QuitApp, cx: &mut App| cx.defer(super::windowing::quit_all));
 }
 
 /// 工作区静态默认键位表；与 [`STATIC_DEFAULT_COMBOS`] 互为镜像。
@@ -132,37 +140,23 @@ pub(super) fn default_workspace_bindings() -> Vec<KeyBinding> {
 /// 追加而非替换有两个原因：Ctrl+Shift 组合在 Mac 终端里没有别的含义，留着
 /// 不碍事；而 ⌘C/⌘V 必须存在，否则 Mac 用户第一反应就是「复制粘贴坏了」。
 /// 终端里的 Ctrl+C 仍然是 SIGINT——这里只绑 ⌘，不碰 Ctrl 的语义。
-#[cfg(target_os = "macos")]
+///
+/// 键位来自 `display::keymap::MACOS_COMMAND_ALIASES`：设置页的反查、解绑与
+/// 恢复读的是同一张表，两处不会再各自漂移。注册必须留在这里、且早于用户
+/// 自定义键，这样 `clear_action` 注入的 NoAction 才压得住静态默认绑定。
 fn bind_macos_command_keys(cx: &mut App) {
-    cx.bind_keys([
-        KeyBinding::new("cmd-t", NewTerminal, None),
-        KeyBinding::new("cmd-n", NewWindow, None),
-        KeyBinding::new("cmd-w", CloseActiveTerminal, None),
+    let mut bindings: Vec<KeyBinding> = crate::display::keymap::MACOS_COMMAND_ALIASES
+        .iter()
+        .filter_map(|(combo, action)| workspace_binding_in_context(combo, action, None))
+        .collect();
+    // 剩下这些没有对应的 `config::Action`，或者需要单独的作用域。
+    bindings.extend([
         KeyBinding::new("cmd-b", ToggleSidebar, None),
         KeyBinding::new("cmd-,", OpenSettings, None),
-        KeyBinding::new("cmd-shift-p", ToggleCommandPalette, None),
-        KeyBinding::new("cmd-k", ToggleShellPicker, None),
-        KeyBinding::new("cmd-shift-f", ToggleFileTree, None),
-        KeyBinding::new("cmd-d", SplitRight, None),
-        KeyBinding::new("cmd-shift-d", SplitDown, None),
-        KeyBinding::new("cmd-shift-enter", ToggleZoom, None),
-        KeyBinding::new("cmd-alt-left", FocusPaneLeft, None),
-        KeyBinding::new("cmd-alt-right", FocusPaneRight, None),
-        KeyBinding::new("cmd-alt-up", FocusPaneUp, None),
-        KeyBinding::new("cmd-alt-down", FocusPaneDown, None),
-        KeyBinding::new("cmd-shift-]", SelectNextTab, None),
-        KeyBinding::new("cmd-shift-[", SelectPreviousTab, None),
-        KeyBinding::new("cmd-shift-g", ToggleGitPanel, None),
-        KeyBinding::new("cmd-=", IncreaseFontSize, None),
-        KeyBinding::new("cmd-+", IncreaseFontSize, None),
-        KeyBinding::new("cmd--", DecreaseFontSize, None),
-        KeyBinding::new("cmd-0", ResetFontSize, None),
-        KeyBinding::new("cmd-c", CopySelection, Some(crate::gpui_shell::terminal::KEY_CONTEXT)),
-        KeyBinding::new("cmd-v", PasteClipboard, Some(crate::gpui_shell::terminal::KEY_CONTEXT)),
+        // 设置页与对话框的输入框自带 ⌘V，作用域必须和终端分开。
         KeyBinding::new("cmd-v", gpui_component::input::Paste, Some("Input")),
-        KeyBinding::new("cmd-ctrl-f", ToggleFullscreen, None),
-        KeyBinding::new("cmd-shift-o", OpenQuickJump, None),
     ]);
+    cx.bind_keys(bindings);
 }
 
 /// Typed GPUI adapter for the shared numbered/last-tab actions. The existing
@@ -173,6 +167,12 @@ pub(super) struct SelectTab {
     index: Option<usize>,
 }
 
+/// 退出应用，macOS 上绑 ⌘Q（`Action::Quit` 的 GPUI 侧落点）。处理注册在
+/// [`init`] 的全局兜底上，与绑定同一处维护。
+#[derive(Clone, Debug, PartialEq, gpui::Action)]
+#[action(namespace = nebula_workspace, no_json)]
+pub(super) struct QuitApp;
+
 impl SelectTab {
     fn from_config(action: &crate::config::Action) -> Option<Self> {
         use crate::config::Action;
@@ -250,8 +250,9 @@ fn workspace_binding_in_context(
         )),
         Action::ToggleFullscreen => Some(KeyBinding::new(&combo, ToggleFullscreen, scope)),
         Action::OpenQuickJump => Some(KeyBinding::new(&combo, OpenQuickJump, scope)),
-        // Mask the app action. ReceiveChar entries from the editor allow
-        // the terminal input handler to encode the released key.
+        // macOS 的退出键走与托盘退出同一条路径：先落盘会话与草稿，再停 PTY。
+        Action::Quit => Some(KeyBinding::new(&combo, QuitApp, scope)),
+        // 屏蔽应用动作后，ReceiveChar 仍交给终端编码，保留改键释放旧键的语义。
         Action::None | Action::ReceiveChar => Some(KeyBinding::new(&combo, gpui::NoAction, scope)),
         _ => None,
     }
diff --git a/nebula_app/src/gpui_shell/workspace/keyboard_bindings/tests.rs b/nebula_app/src/gpui_shell/workspace/keyboard_bindings/tests.rs
index 3929aec..9c9a035 100644
--- a/nebula_app/src/gpui_shell/workspace/keyboard_bindings/tests.rs
+++ b/nebula_app/src/gpui_shell/workspace/keyboard_bindings/tests.rs
@@ -1,4 +1,90 @@
 use super::*;
+
+#[test]
+fn command_aliases_and_modifier_order_share_one_runtime_identity() {
+    let expected = gpui_binding_combo("shift+cmd+k");
+    for combo in ["Shift+Win+K", "cmd+shift+k", "super+shift+k"] {
+        assert_eq!(gpui_binding_combo(combo), expected, "{combo}");
+    }
+    assert_ne!(gpui_binding_combo("cmd+k"), expected);
+    assert_ne!(gpui_binding_combo("ctrl+shift+k"), expected);
+}
+
+mod macos_command_keys {
+    use super::*;
+
+    /// #238：别名表里的每条都必须落到 gpui 绑定上。表和运行时各写一份时，
+    /// 设置页显示的键可能按下去没有反应；合一之后这条守住两边不再漂移。
+    #[test]
+    fn every_macos_command_alias_binds_a_gpui_action() {
+        for (combo, action) in crate::display::keymap::MACOS_COMMAND_ALIASES {
+            assert!(
+                workspace_binding_in_context(combo, action, None).is_some(),
+                "{combo} → {action:?} 没有对应的 gpui 绑定"
+            );
+        }
+        // ⌘Q 必须落到退出动作，否则退出键不会走保存会话与草稿的路径。
+        let quit = workspace_binding_in_context("cmd+q", &crate::config::Action::Quit, None)
+            .expect("⌘Q 必须有绑定");
+        assert!(quit.action().as_any().is::<QuitApp>(), "⌘Q 必须绑定 QuitApp");
+    }
+
+    #[test]
+    fn command_close_and_quit_dispatch_to_distinct_actions() {
+        use gpui::{KeyContext, Keymap, Keystroke};
+        // 合并后仍按共享别名表分派，防止配置中的 ⌘W/Quit 抢走关闭标签页动作。
+        let bindings = crate::display::keymap::MACOS_COMMAND_ALIASES
+            .iter()
+            .filter_map(|(combo, action)| workspace_binding_in_context(combo, action, None))
+            .collect();
+        let keymap = Keymap::new(bindings);
+        for context in ["Root", crate::gpui_shell::terminal::KEY_CONTEXT] {
+            let contexts = [KeyContext::parse(context).unwrap()];
+            for (combo, quit) in [("cmd-w", false), ("cmd-q", true)] {
+                let input = [Keystroke::parse(combo).unwrap()];
+                let (bindings, pending) = keymap.bindings_for_input(&input, &contexts);
+                assert!(!pending);
+                let action = bindings.first().expect("命令键必须有明确动作").action();
+                if quit {
+                    assert!(action.as_any().is::<QuitApp>());
+                } else {
+                    assert!(action.as_any().is::<CloseActiveTerminal>());
+                }
+            }
+        }
+    }
+
+    /// #238：⌘K 被解绑后，用户注入的 NoAction 必须压得住静态默认绑定。
+    #[test]
+    fn released_cmd_k_is_swallowed_by_no_action() {
+        use crate::config::Action;
+        use gpui::{KeyContext, Keymap, Keystroke};
+        let contexts = [
+            KeyContext::parse("Root").unwrap(),
+            KeyContext::parse(crate::gpui_shell::terminal::KEY_CONTEXT).unwrap(),
+        ];
+        let input = [Keystroke::parse("cmd-k").unwrap()];
+        // 反向对照：只有静态默认键时 ⌘K 必须命中 Shell 选择器，否则本用例空跑。
+        let default =
+            custom_workspace_binding("cmd+k", &Action::ToggleShellPicker).expect("静态默认键");
+        let (bindings, pending) =
+            Keymap::new(vec![default.clone()]).bindings_for_input(&input, &contexts);
+        assert!(!pending, "对照组必须命中");
+        assert!(bindings[0].action().as_any().is::<ToggleShellPicker>());
+        // `update_keybinds` 在两个作用域各注入一条 NoAction，这里照抄运行时形状。
+        let clear = workspace_binding_in_context("cmd+k", &Action::ReceiveChar, None).unwrap();
+        let clear_terminal = workspace_binding_in_context(
+            "cmd+k",
+            &Action::ReceiveChar,
+            Some(crate::gpui_shell::terminal::KEY_CONTEXT),
+        )
+        .unwrap();
+        let released = Keymap::new(vec![default, clear, clear_terminal]);
+        let (bindings, pending) = released.bindings_for_input(&input, &contexts);
+        assert!(bindings.is_empty() && !pending, "解绑后不应有任何应用动作消费 ⌘K");
+    }
+}
+
 #[test]
 fn cleared_shortcut_reaches_terminal_and_can_be_restored_without_restart() {
     use crate::config::Action;
@@ -120,6 +206,65 @@ mod dispatch {
         });
     }
 
+    #[gpui::test]
+    fn command_shortcut_registration_follows_runtime_platform(cx: &mut TestAppContext) {
+        let (_directory, workspace, mut cx) = open_workspace(1, cx);
+        press("cmd-k", &mut cx);
+        assert_eq!(
+            workspace.read_with(&cx, |workspace, _| workspace.shell_picker_open),
+            crate::platform::Platform::current() == crate::platform::Platform::MacOS,
+            "共享别名表只应在 macOS 注册原生命令键"
+        );
+    }
+
+    #[gpui::test]
+    #[cfg(target_os = "macos")]
+    fn recorded_command_key_can_restore_default(cx: &mut TestAppContext) {
+        use crate::display::keymap;
+        let (_directory, workspace, mut cx) = open_workspace(1, cx);
+        press("cmd-k", &mut cx);
+        assert!(workspace.read_with(&cx, |workspace, _| workspace.shell_picker_open));
+        press("escape", &mut cx);
+        let keymap::CaptureOutcome::Bind(combo) =
+            keymap::capture_gpui(&Keystroke::parse("cmd-k").unwrap())
+        else {
+            panic!("expected captured shortcut")
+        };
+        assert_eq!(combo, "win+k");
+        let mut raw = vec![(combo, "ToggleShellPicker".into())];
+        workspace.update(&mut cx, |workspace, cx| workspace.update_keybinds(raw.clone(), cx));
+        press("cmd-k", &mut cx);
+        assert!(workspace.read_with(&cx, |workspace, _| workspace.shell_picker_open));
+        press("escape", &mut cx);
+        keymap::reset_action(&mut raw, &crate::config::Action::ToggleShellPicker);
+        workspace.update(&mut cx, |workspace, cx| workspace.update_keybinds(raw, cx));
+        press("cmd-k", &mut cx);
+        assert!(
+            workspace.read_with(&cx, |workspace, _| workspace.shell_picker_open),
+            "Reset after recording Cmd+K must restore its default action"
+        );
+    }
+
+    #[gpui::test]
+    #[cfg(target_os = "macos")]
+    fn old_fullscreen_unbind_can_restore_default(cx: &mut TestAppContext) {
+        use crate::display::keymap;
+        let (_directory, workspace, mut cx) = open_workspace(1, cx);
+        for combo in ["Ctrl+Cmd+F", "Ctrl+Win+F", "super+ctrl+f"] {
+            let mut raw = vec![(combo.into(), "ReceiveChar".into())];
+            workspace.update(&mut cx, |workspace, cx| workspace.update_keybinds(raw.clone(), cx));
+            press("ctrl-cmd-f", &mut cx);
+            assert!(!cx.update(|window, _| window.is_fullscreen()));
+            keymap::reset_action(&mut raw, &crate::config::Action::ToggleFullscreen);
+            assert!(raw.is_empty());
+            workspace.update(&mut cx, |workspace, cx| workspace.update_keybinds(raw, cx));
+            press("ctrl-cmd-f", &mut cx);
+            assert!(cx.update(|window, _| window.is_fullscreen()), "reset failed for {combo}");
+            press("ctrl-cmd-f", &mut cx);
+            assert!(!cx.update(|window, _| window.is_fullscreen()));
+        }
+    }
+
     #[gpui::test]
     fn digits_switch_real_tabs_and_focus_in_both_tab_layouts(cx: &mut TestAppContext) {
         let (_directory, workspace, mut cx) = open_workspace(10, cx);