feat: adapt to DSH 0.1.7-rc.1

Move the support line from 0.1.7-alpha.1 to 0.1.7-rc.1 (peer floor
`^0.1.7-rc.1`). 0.21.0-alpha.1 never reached npm, and once the code-card
labels below are fixed the same build crashes on alpha.1 (its DiffBlock
still reads the `labels.files` upstream deleted), so declaring only the
host we verify against is the honest floor — and from rc.1 on the host
enforces peers at boot anyway: a row whose `@deepseek-ai/dsh-*` peers do
not satisfy the runtime is silently disabled.

Dependencies: 28 devDependency pins and 14 peers move to 0.1.7-rc.1.
rc.1 also raised the vendored runtime (cordis 4.0.4, schemastery 3.18.4,
cordis-plugin-group 1.0.4, cordis-plugin-include 1.0.9) and publishes DSH
cross-references as exact versions, so bumping schemastery/cordis alone
left four unmet transitive peers — the three vendor packages are hoisted
into devDependencies, which is what makes `pnpm peers check` clean again.

One compile break: rc.1 added `CodeToolbarLabels` (codeLabel / wrapLabel /
unwrapLabel, all required), made DiffBlockLabels / ReadBlockLabels extend
it and deleted `DiffBlockLabels.files`. Fixing SideChatView then leaving
markdown on the legacy banner would render two different code-card styles
inside one side-chat view, so the plugin adopts the card everywhere:
`markdownTextProps()` now passes `labels.code.toolbarLabels` with the
host's own wording (codeBlock.title|wrap|unwrap, added to all 20
dictionaries; `sideChatBlockFiles` retires with the deleted footer).

Adopting the card surfaced a silent regression the suite caught: the new
toolbar shows `codeLabel` for languages the highlighter does not know, and
mermaid has no shiki grammar, so the info string no longer reaches the DOM
and the banner-text probe in mermaid.tsx matched nothing — mermaid fences
stopped being swapped for diagrams. Detection now matches the FENCE BODY
from the source that produced the render.

`tests/market-manifest.spec.ts` pins every DSH peer as a floating caret
range: an exact pin (the devDependency style) or a comparator without a
prerelease would fail rc.1's preflight and silently stop the plugin from
loading, and `pnpm peers check` cannot see that — it validates the
resolved dev tree, not the range shape the host reads.

src/client/SideChatView.tsx

@@ -121,6 +121,11 @@ interface ThreadCache {
 interface RowLabels {
   copyLabel: string
   copiedLabel: string
+  /** Code-card chrome (DSH 0.1.7-rc.1's fence toolbar): the markdown rows read
+   *  these three straight off this object, the diff / read cards mix them in. */
+  codeLabel: string
+  wrapLabel: string
+  unwrapLabel: string
   thinkLabel: string
   injectionLabel: string
   terminal: TerminalBlockLabels
@@ -345,9 +350,18 @@ export function SideChatView(props: {
       expand: (hidden: number) => t('sideChatBlockExpand', { hidden }),
       expandAria: (hidden: number) => t('sideChatBlockExpandAria', { hidden }),
     }
+    // DSH 0.1.7-rc.1 widened the diff / read cards into code cards and DELETED
+    // `DiffBlockLabels.files`, so the old "N files" footer is gone and these
+    // three strings are required by both cards.
+    const codeCard = {
+      codeLabel: t('codeBlockTitle'),
+      wrapLabel: t('codeBlockWrap'),
+      unwrapLabel: t('codeBlockUnwrap'),
+    }
     return {
       copyLabel: t('copy'),
       copiedLabel: t('copied'),
+      ...codeCard,
       thinkLabel: t('sideChatThink'),
       injectionLabel: t('sideChatInjection'),
       terminal: {
@@ -362,8 +376,8 @@ export function SideChatView(props: {
         done: t('sideChatBlockDone'),
         noOutput: t('sideChatBlockNoOutput'),
       },
-      diff: { ...shared, files: (count: number) => t('sideChatBlockFiles', { count }) },
-      read: { ...shared, window: (shown: number, total: number) => t('sideChatBlockWindow', { shown, total }) },
+      diff: { ...shared, ...codeCard },
+      read: { ...shared, ...codeCard, window: (shown: number, total: number) => t('sideChatBlockWindow', { shown, total }) },
     }
   }, [])