fileshare (#5414)

Co-authored-by: ConnorYoh <[email protected]>
Co-authored-by: Connor Yoh <[email protected]>
Co-authored-by: EthanHealy01 <[email protected]>
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

frontend/src/core/pages/HomePage.tsx

@@ -45,6 +45,7 @@ export default function HomePage() {
     readerMode,
     setLeftPanelView,
     toolAvailability,
+    customWorkbenchViews,
   } = useToolWorkflow();
 
   const { openFilesModal } = useFilesModalContext();
@@ -104,6 +105,10 @@ export default function HomePage() {
     navigationState.workbench,
   ]);
 
+  const hideToolPanel = customWorkbenchViews.find(
+    (v) => v.workbenchId === navigationState.workbench
+  )?.hideToolPanel ?? false;
+
   const brandAltText = t("home.mobile.brandAlt", "Stirling PDF logo");
   const brandIconSrc = useLogoPath();
   const { wordmark } = useLogoAssets();
@@ -178,6 +183,14 @@ export default function HomePage() {
     }
   }, [isMobile, readerMode, selectedToolKey]);
 
+  // Automatically switch to workbench slide when a custom workbench (e.g. signing) is active on mobile.
+  // hideToolPanel is true for all custom workbenches that take over the full screen.
+  useEffect(() => {
+    if (isMobile && hideToolPanel) {
+      setActiveMobileView('workbench');
+    }
+  }, [isMobile, hideToolPanel]);
+
   // When navigating back to tools view in mobile with a workbench-only tool, show tool picker
   useEffect(() => {
     if (isMobile && activeMobileView === 'tools' && selectedTool) {
@@ -314,7 +327,7 @@ export default function HomePage() {
           className="flex-nowrap flex"
         >
           <QuickAccessBar ref={quickAccessRef} />
-          <ToolPanel />
+          {!hideToolPanel && <ToolPanel />}
           <Workbench />
           <RightRail />
           <FileManager selectedTool={selectedTool as any /* FIX ME */} />