[FEATURE]: assignable keyboard shortcut for the reasoning summaries toggle

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

(Related but distinct: #48671 requests quick toggles for reasoning summaries in the main window UI; this request is about a keyboard shortcut / command palette entry for the existing settings toggle. No issue covers a shortcut for settings.general.showReasoningSummaries.)

Describe the enhancement you want to request

The setting "Show reasoning summaries" (in French UI: "Afficher les résumés de raisonnement"; internal key settings.general.showReasoningSummaries) can only be toggled from the Settings panel. There is no keyboard shortcut, no command palette entry, and no menu item for it. I would like a configurable keyboard shortcut to toggle this setting from anywhere in the app.

Use case: when working in a long session, I sometimes want to read the model's step-by-step reasoning and sometimes I want to skip it to focus on the final answer. Switching currently requires: open Settings (Ctrl+,) → scroll to the "Afficher les résumés de raisonnement" row → click the switch. That is three actions for something I want to do many times per session. A single keystroke would be ideal.

Suggested implementation: expose the toggle as a registered command (similar to how settings.open, terminal.toggle, fileTree.toggle, and sidebar.toggle are registered) so it appears in the command palette and accepts a keybind. Something like:

command.register("view", () => [{
  id: "reasoning.toggle",
  title: language.t("command.reasoning.toggle"),
  category: language.t("command.category.view"),
  onSelect: () => {
    const next = !settings.general.showReasoningSummaries();
    settings.general.setShowReasoningSummaries(next);
  }
}]);

Then add the matching desktop.menu.toggleReasoning item in the view submenu of DESKTOP_MENU (alongside toggleSidebar, toggleTerminal, toggleFileTree) and a command.reasoning.toggle translation key. Users could then assign their own keybind.

Why I cannot work around this myself: I tried to write a local plugin to register this command. The plugin API (@opencode-ai/plugin's PluginInput — { client, project, directory, $ }) does not give access to the settings store, so a plugin cannot call settings.general.setShowReasoningSummaries(...). The setting is also persisted in electron-store's binary opencode.global.dat (~/.config/ai.opencode.desktop/opencode.global.dat), so hand-editing the file is not viable. A native command in the main app is the only path.

Environment:

• App: opencode desktop v1.18.30
• OS: Linux Mint 22.3
• File examined: /opt/OpenCode/resources/app.asar
• Relevant code locations (offsets in the asar bundle, may shift between versions):
  • settings.general.setShowReasoningSummaries definition: ~offset 120858368
  • Settings UI switch (renderer): ~offsets 107283544 and 114374712
  • command.register("settings", ...) pattern with mod+comma keybind: ~offset 123629997
  • DESKTOP_MENU view submenu (where the new item would belong): ~offset 97637441

Acceptance criteria:

• A new command reasoning.toggle is registered in the main app, in the view category.
• The command appears in the command palette.
• The command appears in the View menu (Affichage) of the app menu bar on macOS, Windows and Linux, with the same disabled-state logic as the other view toggles.
• The keybind for the command is user-configurable from the Settings panel (same way as other commands, if the app supports custom keybinds; otherwise default to something like mod+shift+r).
• Toggling the command flips settings.general.showReasoningSummaries and the change is reflected immediately in the chat timeline (no app restart required).

Note for maintainers: an earlier issue (#49372) was auto-closed for not using this template — this is the same request, resubmitted correctly.