feat: add a command palette and move panes from it

docs/next/CHANGELOG.md

@@ -5,6 +5,8 @@
 ### Added
 - Settings and `ui.status_indicators = "symbols"` can now use distinct static shapes for blocked, working, done, idle, and unknown agent states. (#2260)
 - The plugin marketplace now discovers valid manifests at repository roots and subdirectories, groups multiple plugins under each repository, and publishes their versions and exact default-branch commits.
+- Added a command palette on `prefix+/` listing every runnable action with its shortcut, filtered as you type and ranked so an exact command name outranks a longer command containing it.
+- Added palette commands to move the focused pane to an existing space, a new space, or a new tab. Choosing an existing space opens the session navigator as a destination picker offering a new space, each space as a new tab there, or each tab to split into, with the selected row's effect shown above the footer.
 
 ### Fixed
 - Claude Code confirmation prompts using `Enter to confirm · Esc to cancel` now report `blocked` instead of `idle`. (#2268)

docs/next/website/src/content/docs/ja/keyboard.mdx

@@ -17,6 +17,14 @@ Herdr はマウスネイティブです。キーバインドをひとつも覚
 
 いつでも `prefix+?` を押すと、すべての有効なバインドが表示されます。キーバインドヘルプで `/` を押すと、アクションとショートカットを絞り込めます。Backspace でフィルターを編集し、`ctrl+u` でクリアできます。
 
+`prefix+/` を押すとコマンドパレットが開きます。実行できるすべてのアクションを、そのショートカットとともに一覧表示し、入力に応じて絞り込みます。矢印キーで選択を移動し、`enter` で選択中のコマンドを実行、`esc` で閉じます。行をクリックしても実行できます。
+
+一致は入力内容への適合度で並びます。あるコマンド名を正確に入力した場合、その語を含むだけのより長いコマンドより上位になります。
+
+フォーカス中のペインを移動する次の 3 つのコマンドには専用のショートカットがないため、パレットから実行します: `move pane to space`、`move pane to new space`、`move pane to new tab`。
+
+`move pane to space` はセッションナビゲーターを開いて移動先を選ばせます。同じように絞り込んで `enter` を押します。`+ new space` を選ぶとペイン専用のスペースへ、スペースを選ぶとその中の新しいタブへ、タブを選ぶとそのタブ内に分割して配置されます。フッターの上の行に選択中の行が何をするかが表示され、`esc` を押すと何も移動せずに取り消します。
+
 ## まずこの 5 つを覚える
 
 | アクション | キー |

docs/next/website/src/content/docs/keyboard.mdx

@@ -17,6 +17,14 @@ The prefix solves this. Press the prefix key, default `ctrl+b`, and the next key
 
 Press `prefix+?` at any time to see every active binding. Press `/` in the keybind help to filter actions and shortcuts; use Backspace to edit the filter or `ctrl+u` to clear it.
 
+Press `prefix+/` to open the command palette. It lists every action you can run, with that action's shortcut alongside it, and filters as you type. Arrow keys move the selection, `enter` runs the selected command, and `esc` closes. Clicking a row runs it too.
+
+Matches are ranked by how well they answer what you typed, so a query naming one command exactly wins over a longer command that merely contains it.
+
+Three commands move the focused pane and have no shortcut of their own, so the palette is where you reach them: `move pane to space`, `move pane to new space`, and `move pane to new tab`.
+
+`move pane to space` opens the session navigator to pick a destination. Filter it the same way, then press `enter`. Pick `+ new space` to give the pane a space of its own, a space to put it in a new tab there, or a tab to split it into that tab. The line above the footer says what the selected row will do, and `esc` cancels without moving anything.
+
 ## Learn these five first
 
 | Action | Key |

docs/next/website/src/content/docs/zh-cn/keyboard.mdx

@@ -17,6 +17,14 @@ Herdr 是鼠标原生的。你可以点击窗格、标签页、工作区和智
 
 随时按 `prefix+?` 可以查看所有生效的绑定。在快捷键帮助中按 `/` 即可筛选操作和快捷键；使用 Backspace 编辑筛选内容，或按 `ctrl+u` 清除。
 
+按 `prefix+/` 打开命令面板。它会列出所有可执行的操作，并在旁边显示各自的快捷键，并随输入进行筛选。方向键移动选择，`enter` 执行选中的命令，`esc` 关闭。点击某一行也可以执行它。
+
+匹配项按与输入内容的贴合程度排序，因此准确输入某个命令名时，它会排在仅仅包含该词的更长命令之前。
+
+有三个移动当前窗格的命令没有自己的快捷键，只能从命令面板执行：`move pane to space`、`move pane to new space` 和 `move pane to new tab`。
+
+`move pane to space` 会打开会话导航器让你选择目标：用同样的方式筛选，然后按 `enter`。选中 `+ new space` 会让该窗格独占一个新空间，选中空间会放进该空间的新标签页，选中标签页则会在该标签页内分割。页脚上方的一行会说明选中的行将执行什么操作，按 `esc` 则取消，不移动任何内容。
+
 ## 先学这五个
 
 | 动作 | 按键 |

docs/next/website/src/data/config-reference.json

@@ -265,6 +265,12 @@
           "default": "\"prefix+w\"",
           "description": "Open the workspace navigation surface."
         },
+        {
+          "key": "keys.command_palette",
+          "type": "keybinding",
+          "default": "\"prefix+/\"",
+          "description": "Open the command palette, listing every runnable action with its shortcut and filtering as you type."
+        },
         {
           "key": "keys.goto",
           "type": "keybinding",

src/app/actions.rs

@@ -266,6 +266,21 @@ impl AppState {
         })
     }
 
+    pub(crate) fn public_pane_id(&self, ws_idx: usize, pane_id: PaneId) -> Option<String> {
+        let ws = self.workspaces.get(ws_idx)?;
+        let pane_number = ws.public_pane_number(pane_id)?;
+        Some(crate::workspace::public_pane_id_for_number(
+            &ws.id,
+            pane_number,
+        ))
+    }
+
+    pub(crate) fn focused_public_pane_id(&self) -> Option<String> {
+        let ws_idx = self.active?;
+        let pane_id = self.workspaces.get(ws_idx)?.focused_pane_id()?;
+        self.public_pane_id(ws_idx, pane_id)
+    }
+
     pub(crate) fn pane_focus_target_indices(
         &self,
         target: &PaneFocusTarget,
@@ -360,15 +375,14 @@ impl AppState {
         self.navigator.state_filter = None;
         self.navigator.scroll = 0;
         self.navigator.expanded_workspaces.clear();
+        self.navigator.pending_pane_move = None;
 
         for ws in &self.workspaces {
             self.navigator.expanded_workspaces.insert(ws.id.clone());
         }
 
         self.mode = Mode::Navigator;
-        self.navigator.selected = self
-            .current_navigator_row_index_from(terminal_runtimes)
-            .unwrap_or(0);
+        self.reseat_navigator_selection_from(terminal_runtimes);
         self.ensure_navigator_selection_visible_from(terminal_runtimes);
     }
 
@@ -385,6 +399,27 @@ impl AppState {
         let query = self.navigator.query.trim().to_lowercase();
         let query_kind = navigator_query_kind(&query, self.navigator.state_filter);
         let mut rows = Vec::new();
+        if self.navigator.pending_pane_move.is_some() {
+            let row = NavigatorRow {
+                target: NavigatorTarget::NewWorkspace,
+                depth: 0,
+                label: "+ new space".to_string(),
+                meta: String::new(),
+                status: crate::detect::AgentState::Unknown,
+                seen: true,
+                is_current: false,
+                is_workspace: false,
+                is_tab: false,
+                expanded: false,
+                search_text: "new space".to_string(),
+                matched: true,
+            };
+            if !matches!(query_kind, NavigatorQueryKind::Text)
+                || navigator_matches(&query, &row.search_text)
+            {
+                rows.push(row);
+            }
+        }
         for (ws_idx, ws) in self.workspaces.iter().enumerate() {
             let workspace_label = ws.display_name_from(&self.terminals, terminal_runtimes);
             let activity = workspace_activity_summary(ws, &self.terminals);
@@ -453,7 +488,13 @@ impl AppState {
             if let Some(tab_row) = tab_row.as_mut() {
                 tab_row.matched = tab_matches;
             }
-            let mut pane_rows = self.navigator_pane_rows_for_tab(ws_idx, tab_idx, multi_tab);
+            // A pane is where a moved pane lands, not a destination of its own,
+            // so the armed picker offers spaces and tabs only.
+            let mut pane_rows = if self.navigator.pending_pane_move.is_some() {
+                Vec::new()
+            } else {
+                self.navigator_pane_rows_for_tab(ws_idx, tab_idx, multi_tab)
+            };
             let filtered_panes = match query_kind {
                 NavigatorQueryKind::Empty => pane_rows,
                 NavigatorQueryKind::State(filter) => pane_rows
@@ -594,6 +635,17 @@ impl AppState {
         rows
     }
 
+    /// Arming a move changes which rows exist, so the selection has to be
+    /// chosen against the row set the user will actually see.
+    pub(crate) fn reseat_navigator_selection_from(
+        &mut self,
+        terminal_runtimes: &crate::terminal::TerminalRuntimeRegistry,
+    ) {
+        self.navigator.selected = self
+            .current_navigator_row_index_from(terminal_runtimes)
+            .unwrap_or(0);
+    }
+
     fn current_navigator_row_index_from(
         &self,
         terminal_runtimes: &crate::terminal::TerminalRuntimeRegistry,
@@ -788,6 +840,8 @@ impl AppState {
 
     pub(crate) fn focus_navigator_target(&mut self, target: NavigatorTarget) -> bool {
         match target {
+            // Exists only as a move destination, so there is nothing to focus.
+            NavigatorTarget::NewWorkspace => false,
             NavigatorTarget::Workspace { ws_idx } => {
                 if ws_idx >= self.workspaces.len() {
                     return false;

src/app/ids.rs

@@ -29,12 +29,7 @@ impl App {
         ws_idx: usize,
         pane_id: crate::layout::PaneId,
     ) -> Option<String> {
-        let ws = self.state.workspaces.get(ws_idx)?;
-        let pane_number = ws.public_pane_number(pane_id)?;
-        Some(crate::workspace::public_pane_id_for_number(
-            &ws.id,
-            pane_number,
-        ))
+        self.state.public_pane_id(ws_idx, pane_id)
     }
 
     pub(super) fn pane_launch_env(