feat(host,client): ship the in-app directory browser as the browse package's client half

directory-picker-browse becomes dual-face: its browser half fills
ui-workspace's two directory-flow holes with the Select Workspace Directory
dialog (figma Harness 813-23126 family — Miller two-column view, breadcrumb
with click-to-edit path zone, nested New-folder dialog), driving the node
half's host.listDirectory/host.createDirectory and owning its locale
namespace (directory-browser, zh default / en). The dialog moves here from
ui-workspace wholesale — the trigger surfaces keep only the flow-hole owner
conversation.

apps/cli flips its one directory-picker row -native -> -browse, swapping the
host backend and the client interaction together; picking now works for
remote deployments out of the box. The keyless workspace-flow snapshot boots
the browse bundle and drives menu -> dialog -> Documents -> project -> Open
against the fixture tree.

packages/client/ui-workspace/package.json

@@ -25,7 +25,6 @@
   "dshClient": {
     "inject": [
       "@deepseek-ai/dsh-client-runtime",
-      "@deepseek-ai/dsh-client-locale",
       "@deepseek-ai/dsh-client-ui-conversation",
       "@deepseek-ai/dsh-client-ui-sidebar"
     ],
@@ -40,7 +39,6 @@
     "clsx": "^2.0.0"
   },
   "peerDependencies": {
-    "@deepseek-ai/dsh-client-locale": "^0.0.1",
     "@deepseek-ai/dsh-client-runtime": "^0.0.1",
     "@deepseek-ai/dsh-client-ui-primitives": "^0.0.1",
     "@deepseek-ai/dsh-client-ui-slots": "^0.0.1",
@@ -49,7 +47,6 @@
     "react": "^18.2.0"
   },
   "devDependencies": {
-    "@deepseek-ai/dsh-client-locale": "workspace:^",
     "@deepseek-ai/dsh-client-runtime": "workspace:^",
     "@deepseek-ai/dsh-client-ui-conversation": "workspace:^",
     "@deepseek-ai/dsh-client-ui-primitives": "workspace:^",