fix(web): test mocks missing workspace_repos field

Playwright session mocks predate the SessionResponse.workspace_repos
field. The new SessionRow chip + multi-repo group hook both read
.length on the array, so an undefined value crashed the sidebar
render and clickSidebarSession could not find any session row.
Add workspace_repos: [] to both mocks. Also harden the two readers
with ?.length ?? 0 so future API skew degrades gracefully.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Seluj78

web/src/components/WorkspaceSidebar.tsx

@@ -344,7 +344,7 @@ const SessionRow = memo(function SessionRow({
                 {subtitle}
               </span>
             )}
-            {firstSession && firstSession.workspace_repos.length > 1 && (
+            {firstSession && (firstSession.workspace_repos?.length ?? 0) > 1 && (
               <span
                 className="mt-0.5 flex flex-wrap gap-1 text-[10px] font-mono text-text-dim"
                 title={firstSession.workspace_repos.map((r) => r.source_path).join("\n")}

web/src/hooks/useRepoGroups.ts

@@ -13,7 +13,7 @@ function loadCollapsed(id: string): boolean {
 }
 
 function isMultiRepoWorkspace(ws: Workspace): boolean {
-  return ws.sessions.some((s) => s.workspace_repos.length > 1);
+  return ws.sessions.some((s) => (s.workspace_repos?.length ?? 0) > 1);
 }
 
 export function useRepoGroups(workspaces: Workspace[]): {

web/tests/helpers/terminal-mocks.ts

@@ -34,6 +34,7 @@ export async function mockTerminalApis(page: Page): Promise<MockHandle> {
           is_sandboxed: false,
           has_terminal: true,
           profile: "default",
+          workspace_repos: [],
         },
       ],
     });

web/tests/ws-reconnect.spec.ts

@@ -34,6 +34,7 @@ async function mockApisExceptWs(page: Page, sessionTitle: string) {
           is_sandboxed: false,
           has_terminal: true,
           profile: "default",
+          workspace_repos: [],
         },
       ],
     });