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/ui-conversation/src/client/chat/ChatView.tsx

@@ -16,7 +16,7 @@ import {
 import type {
   ConversationNode, ConversationSnapshot, RunningToolCall, SessionId, ToolResultNode,
 } from '@deepseek-ai/dsh-client-runtime/client'
-import type { SnapshotSelectorHook } from '@deepseek-ai/dsh-client-web-react'
+import type { SnapshotSelectorHook } from '@deepseek-ai/dsh-client-ui-slots'
 import { IconChevronDownOutline14 } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { ConvViewProps, SelectionTarget, Translate } from '../contract/views.ts'
 import type { ToolViewProps } from '../contract/toolview.ts'
@@ -38,7 +38,7 @@ const FOLLOW_THRESHOLD = 24
 
 type OpenDetails = (target: SelectionTarget) => void
 
-/** web-react's UseSession is deliberately wide (dependency direction); the
+/** ui-slots' UseSession is deliberately wide (dependency direction); the
  *  chat view narrows once to the runtime snapshot the binding actually feeds. */
 type UseConversation = SnapshotSelectorHook<ConversationSnapshot>
 

packages/client/ui-conversation/src/client/chat/StatsLine.tsx

@@ -7,7 +7,7 @@
 
 import { memo, useMemo } from 'react'
 import type { ConversationSnapshot } from '@deepseek-ai/dsh-client-runtime/client'
-import type { SnapshotSelectorHook } from '@deepseek-ai/dsh-client-web-react'
+import type { SnapshotSelectorHook } from '@deepseek-ai/dsh-client-ui-slots'
 import type { ChromeProps } from '../contract/views.ts'
 import css from './StatsLine.module.css'
 

packages/client/ui-conversation/src/client/contract/toolview.ts

@@ -6,7 +6,7 @@
  * implementation files import this, never each other.
  */
 import type { FC } from 'react'
-import type { UseSession } from '@deepseek-ai/dsh-client-web-react'
+import type { UseSession } from '@deepseek-ai/dsh-client-ui-slots'
 import type { SessionId, ToolCallBlock } from '@deepseek-ai/dsh-client-runtime/client'
 import type { CallId, Translate } from './views.ts'
 

packages/client/ui-conversation/src/client/contract/views.ts

@@ -6,7 +6,7 @@
  * import this, never each other.
  */
 import type { FC } from 'react'
-import type { SnapshotSelectorHook, UseSession } from '@deepseek-ai/dsh-client-web-react'
+import type { SnapshotSelectorHook, UseSession } from '@deepseek-ai/dsh-client-ui-slots'
 import type { SessionId } from '@deepseek-ai/dsh-client-runtime/client'
 
 /**

packages/client/ui-conversation/src/client/skeleton/ConversationRoot.tsx

@@ -7,8 +7,8 @@
 
 import { useMemo, useSyncExternalStore, type ReactNode } from 'react'
 import clsx from 'clsx'
+import { shallowEqual } from '@deepseek-ai/dsh-client-runtime/client'
 import type { SessionId, SessionListState, SessionSummary } from '@deepseek-ai/dsh-client-runtime/client'
-import { shallowEqual } from '@deepseek-ai/dsh-client-web-react'
 import type { ConversationSlotProps } from '../contract/slots.ts'
 import type { ConvViewProps, ViewEntry } from '../contract/views.ts'
 import { InputBar } from './InputBar.tsx'

packages/client/ui-conversation/src/client/skeleton/DetailsPanel.tsx

@@ -5,8 +5,8 @@
 // share the store seat exists for) and derives the call material from the
 // session snapshot — no data of its own.
 
+import { shallowEqual } from '@deepseek-ai/dsh-client-runtime/client'
 import type { ConversationSnapshot, ToolResultNode } from '@deepseek-ai/dsh-client-runtime/client'
-import { shallowEqual } from '@deepseek-ai/dsh-client-web-react'
 import type { DetailsSlotProps } from '../contract/slots.ts'
 import css from './DetailsPanel.module.css'
 

packages/client/ui-conversation/src/client/stores.ts

@@ -9,7 +9,7 @@
  * Module exports the factory only — a module-level handle would pin identity
  * in the module cache (a de-facto singleton surviving plugin reloads).
  */
-import { defineStore } from '@deepseek-ai/dsh-client-web-react'
+import { defineStore } from '@deepseek-ai/dsh-client-runtime/client'
 import type { ChatStoreState, SelectionTarget, ViewId } from './contract/views.ts'
 
 /**