Improve sidebar workspace readability and host identity (#2790)

* fix(app): align turn footer actions

Keep running-turn actions in the same position as completed-turn actions and use the shared small icon size for both copy and fork controls.

* feat(app): improve sidebar workspace identity

Make dense sidebar workspace rows easier to scan and let each device control how connected hosts are identified.

* fix(app): keep host badges readable

Use a compact display menu and keep identity color on the host icon so translated controls fit and badge text retains standard contrast.

* fix(app): announce selected sidebar badge mode

* fix(app): retain icon-only host names for screen readers

* fix(app): name hoisted workspace rows

* fix(app): retain host identity in workspace labels

* fix(app): retain workspace status in row labels

* fix(app): defer host appearance until identity resolves

* fix(app): serialize host appearance writes

* fix(app): serialize host registry writes

* fix(app): bound sidebar host badge labels

* test(app): match workspace status labels

* fix(app): consolidate sidebar identity behavior

* test(app): assert status grouping behavior

* fix(app): keep sidebar row actions accessible

* fix(app): stabilize optimistic message layout

packages/app/src/components/assistant-fork-menu.tsx

@@ -10,7 +10,7 @@ import {
   DropdownMenuTrigger,
 } from "@/components/ui/dropdown-menu";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
-import type { Theme } from "@/styles/theme";
+import { ICON_SIZE, type Theme } from "@/styles/theme";
 
 export type AssistantForkTarget = "tab" | "workspace";
 
@@ -69,7 +69,10 @@ export const AssistantForkMenu = memo(function AssistantForkMenu({
     [t],
   );
 
-  const forkIcon = useMemo(() => <ThemedSplit size={16} uniProps={foregroundColorMapping} />, []);
+  const forkIcon = useMemo(
+    () => <ThemedSplit size={ICON_SIZE.sm} uniProps={foregroundColorMapping} />,
+    [],
+  );
 
   return (
     <DropdownMenu open={isOpen} onOpenChange={handleOpenChange}>
@@ -85,7 +88,7 @@ export const AssistantForkMenu = memo(function AssistantForkMenu({
             >
               {({ hovered, open }) => (
                 <ThemedSplit
-                  size={16}
+                  size={ICON_SIZE.sm}
                   uniProps={hovered || open ? foregroundColorMapping : foregroundMutedColorMapping}
                 />
               )}