refactor(gui): one plugin-package shape — dshClient manifests, clientBundle preset, purity gate over all nine

Every client plugin package carries dshClient ({platform, inject,
immediately?}) and emits lib/client.js through the shared clientBundle
preset; exports["./client"] points at the bundle. The infrastructure
tier (connection, runtime, ui-theme, i18n, hmr) declares immediately: true
in its manifest — absent means lazy. The bundle purity gate covers all
nine packages: platform modules stay external, INLINE_SAFE wire layers
inline, any other cross-plugin value import is a build error. Migrations
that rule forced: scopeOf became a SessionsService method and
transportError moved into dsh-host-apiproxy's wire layer; the store
engine stays in runtime under a documented temporary exemption
(TODO(webload/store-rehome)).

packages/client/ui-theme/package.json

@@ -28,10 +28,6 @@
     "platform": "web",
     "immediately": true
   },
-  "scripts": {
-    "bundle": "tsdown",
-    "watch": "tsdown --watch"
-  },
   "license": "BSD-3-Clause",
   "peerDependencies": {
     "@deepseek-ai/dsh-invariants": "^0.0.1",