refactor(gui): move the snapshot-store engine into the client runtime

The data layer no longer depends on the React glue package, and business
plugins no longer depend on web-react at all:

- The store engine (zustand vanilla + immer + persist + dev freeze),
  defineStore, and shallowEqual move to @deepseek-ai/dsh-client-runtime,
  exported from the ./client main entry — no ./store subpath survives on
  either package (the web-react one is deleted, none is opened on runtime).
- Store products are bare snapshot sources: useSelector leaves
  SnapshotStore/StoreInstance and Session; every hook is composed at the
  binding site in web-react's renderer (per-source cached uSES binding).
  The SlotRendererHost sessions face carries bare observables only.
- SessionProvider becomes a standard-kit seat: an entry whose children
  declare a session-scope slot receives the framework component as a prop,
  retiring the last value import of web-react from plugin packages.
  UseSession and the session-area types now live in ui-slots.
- web-react shrinks to the shell-only React glue (renderer, providers,
  uSES bridge); zustand/immer belong to runtime alone; the module-table
  seed and tsdown externals drop the web-react/store seat.
- NODE_ENV replacement is defined once in the shared tsdown client preset
  (browser bundles inline the engine and lost vite's define); the 3-line
  process.env typecheck shim moves to runtime with the engine.
- Stray tsc artifacts (.js/.d.ts/.d.ts.map beside sources under src/)
  swept repo-wide; they shadow real sources under vitest resolution.

Verified: both aggregate typecheck programs at zero; 604 client tests
green; repo-wide grep for web-react/store at zero; real-host playwright
run 7/7 including persist round-trip.

ci: fix test/docs

packages/client/i18n/package.json

@@ -33,7 +33,7 @@
   },
   "license": "BSD-3-Clause",
   "dependencies": {
-    "@deepseek-ai/dsh-client-web-react": "workspace:^"
+    "@deepseek-ai/dsh-client-runtime": "workspace:^"
   },
   "peerDependencies": {
     "@deepseek-ai/dsh-invariants": "^0.0.1",

packages/client/i18n/src/client/index.ts

@@ -5,11 +5,13 @@
  * Contract: api-contracts v3 section 8.
  */
 import type { Context } from 'cordis'
-// Engine subpath: createSnapshotStore left the public face in the slot
-// terminal rework (business stores go through defineStore); framework data
-// stores like this locale cell keep the engine via './store'.
-import type { SnapshotStore } from '@deepseek-ai/dsh-client-web-react/store'
-import { createSnapshotStore } from '@deepseek-ai/dsh-client-web-react/store'
+// The snapshot-store engine lives in runtime (store relocation): framework
+// data stores like this locale cell use it directly. The store carries no
+// hook — a React consumer binds a selector hook via web-react's
+// bindSnapshotSelector at its own seam (none exists today; the current
+// consumers are translate() reads and test-side subscribe/set).
+import type { SnapshotStore } from '@deepseek-ai/dsh-client-runtime/client'
+import { createSnapshotStore } from '@deepseek-ai/dsh-client-runtime/client'
 import { en } from '../locales/en.ts'
 import { zh } from '../locales/zh.ts'
 

packages/client/i18n/tsconfig.json

@@ -18,7 +18,7 @@
       "path": "../../../vendor/cordis"
     },
     {
-      "path": "../web-react"
+      "path": "../runtime"
     },
     {
       "path": "../../support/invariants"