feat(client): localize composer hints and rework input command interaction

Unify the /plan claimed hint with the plan placeholder through a locale
namespace, localize slash menu group titles, replace the PermissionSelect
native select with the Menu primitive, add a goal pause verb chain, clamp
anchored popups to the viewport with scroll-into-view and outside-dismiss,
and fix onPasteUpgrade insertedRange to account for the chip trailing gap.

packages/client/ui-conversation/tsconfig.json

@@ -29,6 +29,9 @@
     {
       "path": "../../plan/plan-mode"
     },
+    {
+      "path": "../../goal/goal"
+    },
     {
       "path": "../../todo/tool-todo"
     },