Switch projects from New Workspace with ⌘P/Ctrl+P (#2110)

* feat(app): add ⌘P shortcut to switch project on New Workspace screen

Opens the existing project picker with its search focused so the project
can be switched from the keyboard (type + Enter) instead of clicking the
badge and then the project.

Wires a new "workspace.project.pick" action through the standard keyboard
pipeline (binding -> route passthrough -> dispatcher), handled by a
screen-scoped handler on the New Workspace screen that is only registered
while the screen is mounted and there are projects to pick. Because
preventDefault only fires when a handler handles the key, ⌘P/Ctrl+P still
triggers native print everywhere else. Adds a Settings -> Shortcuts help
row (rebindable) and the "Switch project" label across all locales.

* test(app): cover project picker shortcut

---------

Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>

packages/app/src/keyboard/keyboard-shortcuts.ts

@@ -131,6 +131,7 @@ const SHORTCUT_HELP_SECTION_LABEL_KEYS: Record<ShortcutSectionId, string> = {
 const SHORTCUT_HELP_LABEL_KEYS: Record<string, string> = {
   "new-agent": "settings.shortcuts.help.openProject",
   "new-workspace": "settings.shortcuts.help.newWorkspace",
+  "switch-project": "settings.shortcuts.help.switchProject",
   "archive-workspace": "settings.shortcuts.help.archiveWorkspace",
   "workspace-tab-new": "settings.shortcuts.help.newTab",
   "workspace-tab-close-current": "settings.shortcuts.help.closeCurrentTab",
@@ -231,6 +232,32 @@ const SHORTCUT_BINDINGS: readonly ShortcutBinding[] = [
     },
   },
 
+  // --- Switch project (New Workspace screen) ---
+  {
+    id: "workspace-project-pick-cmd-p-mac",
+    action: "workspace.project.pick",
+    combo: "Cmd+P",
+    when: { mac: true, commandCenter: false },
+    help: {
+      id: "switch-project",
+      section: "projects",
+      label: "Switch project",
+      keys: ["mod", "P"],
+    },
+  },
+  {
+    id: "workspace-project-pick-ctrl-p-non-mac",
+    action: "workspace.project.pick",
+    combo: "Ctrl+P",
+    when: { mac: false, commandCenter: false, terminal: false },
+    help: {
+      id: "switch-project",
+      section: "projects",
+      label: "Switch project",
+      keys: ["mod", "P"],
+    },
+  },
+
   // --- Archive workspace ---
   {
     // COMPAT(workspaceArchiveShortcutOverride): added in v0.1.106; remove after