feat(frontend): expose owned session scopes

frontend/src/shell/NavSessions.tsx

@@ -10,6 +10,7 @@ interface Props {
   menuFor: (session: SessionSummary) => ReactNode;
   selectedIds?: ReadonlySet<string>;
   onSelectionChange?: (id: string, selected: boolean) => void;
+  showOwner?: boolean;
 }
 
 function statusIndicator(status: string) {
@@ -21,7 +22,7 @@ function statusIndicator(status: string) {
 
 export function NavSessions({
   sessions, activeSessionId, onOpenPanel, menuFor,
-  selectedIds = new Set<string>(), onSelectionChange = () => undefined,
+  selectedIds = new Set<string>(), onSelectionChange = () => undefined, showOwner = false,
 }: Props) {
   if (sessions.length === 0) {
     return (
@@ -70,13 +71,20 @@ export function NavSessions({
                 title={indicator.label}
                 className={["size-1.5 shrink-0 rounded-full", indicator.color].join(" ")}
               />
-              <span
-                className={[
-                  "min-w-0 flex-1 truncate text-[0.8rem] leading-snug",
-                  active ? "font-semibold text-foreground" : "font-medium text-foreground/90",
-                ].join(" ")}
-              >
-                {label}
+              <span className="min-w-0 flex-1">
+                <span
+                  className={[
+                    "block truncate text-[0.8rem] leading-snug",
+                    active ? "font-semibold text-foreground" : "font-medium text-foreground/90",
+                  ].join(" ")}
+                >
+                  {label}
+                </span>
+                {showOwner && (
+                  <span className="block truncate text-[0.65rem] text-muted-foreground">
+                    Owner: {s.author ?? "Unknown"}
+                  </span>
+                )}
               </span>
               {menuFor(s)}
             </div>