fix: 修正 logo 中 N 和 G 字母造型

N 添加对角线笔画（█▄ █），G 添加内横杠（█ ▀█），
避免与 O 字母造型雷同。同步更新 ui.ts 中的硬编码 wordmark。

packages/storybook/.storybook/mocks/app/context/command.ts

@@ -0,0 +1,26 @@
+const keybinds: Record<string, string> = {
+  "file.attach": "mod+u",
+  "prompt.mode.shell": "mod+shift+x",
+  "prompt.mode.normal": "mod+shift+e",
+  "permissions.autoaccept": "mod+shift+a",
+  "agent.cycle": "mod+.",
+  "model.choose": "mod+m",
+  "model.variant.cycle": "mod+shift+m",
+}
+
+export function formatKeybind(config: string) {
+  return config === "none" ? "" : config
+}
+
+export function useCommand() {
+  return {
+    options: [],
+    register() {
+      return () => undefined
+    },
+    trigger() {},
+    keybind(id: string) {
+      return keybinds[id]
+    },
+  }
+}