build(web): declare the locale dependency for ui-subagent

The client plugin now consumes `ctx.locale` (dictionary registration plus
the slot `t` seat), but the package graph did not know it: no
`dshClient.inject` entry, no peer/devDependency, no tsconfig project
reference. Mirror the ui-conversation convention so the dependency graph,
HMR/preflight metadata, and standalone packaging all recognize the
`@deepseek-ai/dsh-client-locale` seam.

packages/client/ui-subagent/package.json

@@ -24,6 +24,7 @@
   },
   "dshClient": {
     "inject": [
+      "@deepseek-ai/dsh-client-locale",
       "@deepseek-ai/dsh-client-runtime",
       "@deepseek-ai/dsh-client-ui-conversation",
       "@deepseek-ai/dsh-client-ui-primitives",
@@ -40,6 +41,7 @@
     "react": "^18.2.0"
   },
   "peerDependencies": {
+    "@deepseek-ai/dsh-client-locale": "^0.0.1",
     "@deepseek-ai/dsh-client-runtime": "^0.0.1",
     "@deepseek-ai/dsh-client-ui-conversation": "^0.0.1",
     "@deepseek-ai/dsh-client-ui-primitives": "^0.0.1",
@@ -49,6 +51,7 @@
     "cordis": "^4.0.0-rc.7"
   },
   "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:^",

packages/client/ui-subagent/tsconfig.json

@@ -11,6 +11,9 @@
     {
       "path": "../../../vendor/cordis"
     },
+    {
+      "path": "../locale"
+    },
     {
       "path": "../runtime"
     },