fix(client-ui-plugin-config): declare the browser half under dsh.client

Merging master's rename of the client manifest field left this package on the
old `dshClient` name. The row still composed and its empty node half still
activated, but the browser roster scan never matched it, so the whole settings
section vanished with no error anywhere.

verify-cordis-config now requires a packages/client package's "./client"
export and its dsh.client declaration to agree in both directions; the
composition file cannot tell a surface plugin from a Host plugin, so the
manifests are where this is checkable. The check is scoped to that group
because a Host package's "./client" export is the typed wire face its browser
consumers import, not a plugin the roster serves.

packages/client/ui-plugin-config/package.json

@@ -22,14 +22,16 @@
     "./src/*": "./src/*",
     "./package.json": "./package.json"
   },
-  "dshClient": {
-    "inject": [
-      "@deepseek-ai/dsh-client-connection",
-      "@deepseek-ai/dsh-client-locale",
-      "@deepseek-ai/dsh-client-runtime",
-      "@deepseek-ai/dsh-client-ui-settings"
-    ],
-    "platform": "web"
+  "dsh": {
+    "client": {
+      "inject": [
+        "@deepseek-ai/dsh-client-connection",
+        "@deepseek-ai/dsh-client-locale",
+        "@deepseek-ai/dsh-client-runtime",
+        "@deepseek-ai/dsh-client-ui-settings"
+      ],
+      "platform": "web"
+    }
   },
   "scripts": {
     "bundle": "tsdown",