feat: adapt to DSH 0.1.2-alpha.1 (Remote gateway + token auth + MarkdownText labels)

Dual-version compatibility: the plugin now works identically on
0.1.0-rc.8 ~ 0.1.1-rc.2 and 0.1.2-alpha.1 (the latter verified against a
source build of the dsh-v0.1.2-alpha.1 tag: mount smoke 14/14 + aggregate
double-mount; 0.1.1-rc.2 re-verified 14/14).

- MarkdownText: alpha.1 renamed the flat optional `codeLabels` prop to a
  required nested `labels: { code: {copyLabel, copiedLabel}, footnotes }`;
  the old prop alone crashes fence rendering with "reading 'code'". All
  four render sites (mermaid / MarkdownHtml / TextEditor / SideChatView)
  now go through src/client/markdown-labels.tsx (dual-shape object passed
  under both prop names).
- e2e mount lanes speak both host dialects (tests/e2e/host-protocol.ts +
  host.ts, unit-locked by tests/e2e-host-protocol.spec.ts):
  - one-time-token browser auth: the launch URL grep extends past the
    `/?token=` query (truncating at `/` loses the token), goto navigates
    the token URL (browser cookie exchange), and stamped navigations
    pre-seed the context cookie via addCookies — the exchange 303 drops
    sibling query params;
  - Remote gateway: dot endpoints first, slash endpoints on 404 fallback,
    with args keyed by the controller parameter name (workspace/create ->
    {request}, session/list -> {_request}; verified on a live host).
- package.json: drop the @deepseek-ai/dsh-client-runtime peer (package
  removed upstream in alpha.1; zero references in the source — the chunk
  externals entry stays and is resolution-tolerant).
- scripts/e2e-mount.sh: fix a latent set -u crash in the npx fallback
  branch ($DSH_CMD followed by a full-width comma parsed as part of the
  variable name).
- CI pin stays at @deepseek-ai/dsh@0.1.1-rc.2 until alpha.1 publishes to
  npm (comment updated); README/AGENTS document the new contracts.
- Version lockstep bumped to 0.17.1.

src/client/MarkdownHtml.tsx

@@ -19,6 +19,7 @@ import { createElement, type ReactNode } from 'react'
 import DOMPurify from 'dompurify'
 import { MarkdownText } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { ComponentType } from 'react'
+import { markdownTextProps } from './markdown-labels.tsx'
 import { lazyChunkComponent } from './lazy-chunk.tsx'
 import { resolveLocalMediaDest } from './markdown-images.ts'
 import {
@@ -193,7 +194,7 @@ function MarkdownSegment({ text, hasMermaid, media, codeLabels }: MarkdownSegmen
     <div ref={containerRef}>
       {hasMermaid
         ? <LazyMermaidMarkdown text={text} codeLabels={codeLabels} />
-        : <MarkdownText text={text} codeLabels={codeLabels} />}
+        : <MarkdownText {...markdownTextProps(text, codeLabels)} />}
     </div>
   )
 }

src/client/SideChatView.tsx

@@ -34,6 +34,7 @@ import {
   StateDot,
   type MenuEntry,
 } from '@deepseek-ai/dsh-client-ui-primitives'
+import { markdownTextProps } from './markdown-labels.tsx'
 import { IconHistoryOutline16, IconSaveOutline16 } from './icons.tsx'
 import type { Context, SidebarHistoryEntry } from '../context-types.ts'
 import {
@@ -186,13 +187,13 @@ function renderRow(row: SidechatTranscriptRow, labels: RowLabels): React.ReactNo
     case 'user':
       return (
         <div key={`${row.kind}:${row.seq}`} className={css.sidechatUser}>
-          <MarkdownText text={row.text} codeLabels={labels} />
+          <MarkdownText {...markdownTextProps(row.text, labels)} />
         </div>
       )
     case 'assistant':
       return (
         <div key={`${row.kind}:${row.seq}`} className={css.sidechatAssistant}>
-          <MarkdownText text={row.text} codeLabels={labels} />
+          <MarkdownText {...markdownTextProps(row.text, labels)} />
         </div>
       )
     case 'reasoning':

src/client/TextEditor.tsx

@@ -20,6 +20,7 @@ import { EditorState } from '@codemirror/state'
 import { EditorView as CodeMirrorView, keymap, lineNumbers } from '@codemirror/view'
 import { defaultKeymap, history, historyKeymap } from '@codemirror/commands'
 import { IconCheckOutline16, MarkdownText } from '@deepseek-ai/dsh-client-ui-primitives'
+import { markdownTextProps } from './markdown-labels.tsx'
 import { api, htmlUrl } from './api.ts'
 import { rewriteLocalImageUrls } from './markdown-images.ts'
 import { languageForPath } from './lang.ts'
@@ -422,7 +423,7 @@ export function TextEditor(props: FileViewerProps) {
             ? <MarkdownDocument info={htmlInfo} media={htmlMedia} codeLabels={codeLabels} />
             : hasMermaid
               ? <LazyMermaidMarkdown text={previewText} codeLabels={codeLabels} />
-              : <MarkdownText text={previewText} codeLabels={codeLabels} />}
+              : <MarkdownText {...markdownTextProps(previewText, codeLabels)} />}
         </div>
       )}
       {html && mode === 'preview' && (

src/client/chunk-loader.ts

@@ -67,6 +67,13 @@ type ChunkFactory = (require: (spec: string) => unknown) => ChunkExports
  * (stripClientSuffix). dsh-client-web-react / dsh-client-schema-form were
  * dropped in DSH 0.1.0-rc.8 (no rc.8 publish, nothing requires them) — the
  * chunks never asked for them, so they no longer belong here.
+ *
+ * DSH 0.1.2-alpha.1 removed the `dsh-client-runtime` package outright (the
+ * seed table gained bare-name `@deepseek-ai/dsh-client-store` instead); the
+ * runtime/client row below stays for 0.1.1-rc.x hosts — no chunk requires
+ * it, and {@link buildExternalsRequire} keeps an unresolvable spec
+ * undefined until a chunk actually asks (only then is it a loud error), so
+ * the entry is inert on 0.1.2-alpha.1+.
  */
 export const CHUNK_EXTERNALS: readonly string[] = [
   'react',

src/client/markdown-labels.tsx

@@ -0,0 +1,52 @@
+/**
+ * Copy-button / chrome labels for DSH's shared `MarkdownText`, shaped for
+ * BOTH prop generations the plugin supports:
+ *
+ * - 0.1.1-rc.x: optional flat prop `codeLabels` — the renderer reads
+ *   `labels.copyLabel` / `labels.copiedLabel` directly.
+ * - 0.1.2-alpha.1+: renamed to a REQUIRED `labels` prop with a nested shape
+ *   (`labels.code.copyLabel` + a screen-reader-only `labels.footnotes`
+ *   heading). Passing only the old prop crashes the fence render with
+ *   "Cannot read properties of undefined (reading 'code')" — the exact
+ *   regression the mount lane caught on a real 0.1.2-alpha.1 host.
+ *
+ * The union object satisfies both readers, and {@link markdownTextProps}
+ * passes it under BOTH prop names — each host ignores the one it does not
+ * know. `footnotes` is left empty (the heading is sr-only; give it a real
+ * string only if a locale key ever earns its place in all 19 dictionaries).
+ */
+import type { ComponentProps } from 'react'
+import { MarkdownText } from '@deepseek-ai/dsh-client-ui-primitives'
+
+/** The flat copy-button pair the plugin threads through its own props
+ *  (e.g. MermaidMarkdownProps.codeLabels — the chunk contract stays put). */
+export interface MarkdownCopyLabels {
+  copyLabel: string
+  copiedLabel: string
+}
+
+/** The dual-generation chrome labels object (see module doc). */
+export interface MarkdownChromeLabels extends MarkdownCopyLabels {
+  /** 0.1.2-alpha.1+ nested reads. */
+  code: MarkdownCopyLabels
+  /** 0.1.2-alpha.1+ sr-only footnotes heading. */
+  footnotes: string
+}
+
+/** Build the dual-shape chrome labels from a flat copy-button pair. */
+export function markdownChromeLabels(labels: MarkdownCopyLabels): MarkdownChromeLabels {
+  return {
+    copyLabel: labels.copyLabel,
+    copiedLabel: labels.copiedLabel,
+    code: { copyLabel: labels.copyLabel, copiedLabel: labels.copiedLabel },
+    footnotes: '',
+  }
+}
+
+/** MarkdownText props carrying the labels under BOTH prop names. The cast is
+ *  load-bearing: the plugin builds against the 0.1.1-rc.x declaration, where
+ *  `labels` does not exist yet (and vice versa on a 0.1.2-alpha.1+ host). */
+export function markdownTextProps(text: string, labels: MarkdownCopyLabels): ComponentProps<typeof MarkdownText> {
+  const chrome = markdownChromeLabels(labels)
+  return { text, codeLabels: chrome, labels: chrome } as unknown as ComponentProps<typeof MarkdownText>
+}

src/client/mermaid.tsx

@@ -30,6 +30,7 @@ import { createRoot, type Root } from 'react-dom/client'
 import mermaid from 'mermaid'
 import { IconCopyOutline16, MarkdownText, writeClipboard } from '@deepseek-ai/dsh-client-ui-primitives'
 import { isDarkScheme, subscribeColorScheme } from './theme.ts'
+import { markdownTextProps } from './markdown-labels.tsx'
 import { t } from './locales.ts'
 import { sanitizeSvg } from './mermaid-sanitize.ts'
 import type { MermaidMarkdownProps } from './mermaid-blocks.ts'
@@ -399,7 +400,7 @@ export function MermaidMarkdown({ text, codeLabels }: MermaidMarkdownProps): Rea
 
   return (
     <div className={css.mermaidMarkdown} ref={containerRef}>
-      <MarkdownText text={text} codeLabels={codeLabels} />
+      <MarkdownText {...markdownTextProps(text, codeLabels)} />
     </div>
   )
 }

src/client/service.ts

@@ -472,7 +472,7 @@ export function matchUrlTarget(tabs: readonly TabDescriptor[], url: URL): TabDes
  * The plugin version this service instance reports. Keep in lockstep with
  * `package.json`'s version — `tests/service.spec.ts` asserts the pair.
  */
-export const SIDEBAR_SERVICE_VERSION = '0.17.0'
+export const SIDEBAR_SERVICE_VERSION = '0.17.1'
 
 /**
  * Monotonic capability list consumers use to gate new API usage (features