feat(desktop): polish desktop shell and shared WebUI surfaces (#4195)

* feat(desktop): add native host scaffold

* feat(webui): track turns and usage in gateway

* feat(webui): polish desktop chat experience

* feat(apps): add ArcGIS and Joplin logos

* feat(desktop): polish shell and shared surfaces

* fix(webui): avoid preview chips for glob references

* test: align CI expectations for token fallback

* feat(webui): preview prompt rail entries

* feat(webui): add prompt navigator drawer

* style(webui): refine prompt navigator placement

* style(webui): align prompt navigator with header actions

* style(webui): simplify prompt navigator header

* refactor(webui): clean thread resource refresh

* feat(desktop): add native reply notifications

* fix(webui): preserve desktop restart and replay state

* fix(desktop): harden gateway proxy startup

* fix(web): fall back when readability is unavailable

* fix(desktop): hide window instead of closing on macos

* fix(webui): unify desktop header actions

* fix(webui): simplify prompt history rows

* fix(desktop): log notification delivery failures

* chore(desktop): clean source package artifacts

* fix(cron): support one-time relative reminders

* fix(webui): reveal scroll button in place

* Revert "fix(cron): support one-time relative reminders"

This reverts commit 4c4661da120a3c7283e0768412bae48604e7390b.

* refactor(webui): extract token usage heatmap

* docs(desktop): clarify contributor guides

---------

Co-authored-by: chengyongru <2755839590@qq.com>

webui/src/components/MarkdownText.tsx

@@ -16,6 +16,7 @@ interface MarkdownTextProps {
   children: string;
   className?: string;
   streaming?: boolean;
+  onOpenFilePreview?: (path: string) => void;
 }
 
 const loadMarkdownRenderer = () => import("@/components/MarkdownTextRenderer");
@@ -25,13 +26,19 @@ const MemoizedMarkdownRenderer = memo(function MemoizedMarkdownRenderer({
   source,
   className,
   highlightCode,
+  onOpenFilePreview,
 }: {
   source: string;
   className?: string;
   highlightCode: boolean;
+  onOpenFilePreview?: (path: string) => void;
 }) {
   return (
-    <LazyMarkdownRenderer className={className} highlightCode={highlightCode}>
+    <LazyMarkdownRenderer
+      className={className}
+      highlightCode={highlightCode}
+      onOpenFilePreview={onOpenFilePreview}
+    >
       {source}
     </LazyMarkdownRenderer>
   );
@@ -55,6 +62,7 @@ export function MarkdownText({
   children,
   className,
   streaming = false,
+  onOpenFilePreview,
 }: MarkdownTextProps) {
   const renderedSource = useStreamingMarkdownSource(children, streaming);
   const highlightCode = streaming
@@ -82,6 +90,7 @@ export function MarkdownText({
         source={renderedSource}
         className={className}
         highlightCode={highlightCode}
+        onOpenFilePreview={onOpenFilePreview}
       />
     </Suspense>
   );