fix: prevent crash when listBranches omits remote fields

- Default remoteBranches/remoteBranchGroups/recommendedTrunk in useCreationWorkspace
- Update Storybook ORPC mock to include required branch fields

Change-Id: Ia717febfc7f3f460c138ec96aaf73843a200a76b
Signed-off-by: Thomas Kosiewski <[email protected]>

Author: ThomasK33

.storybook/mocks/orpc.ts

@@ -162,6 +162,8 @@ export function createMockORPCClient(options: MockORPCClientOptions = {}): APICl
       pickDirectory: async () => null,
       listBranches: async () => ({
         branches: ["main", "develop", "feature/new-feature"],
+        remoteBranches: [],
+        remoteBranchGroups: [],
         recommendedTrunk: "main",
       }),
       remove: async (input: { projectPath: string }) => {

src/browser/components/ChatInput/useCreationWorkspace.ts

@@ -184,10 +184,11 @@ export function useCreationWorkspace({
     const loadBranches = async () => {
       try {
         const result = await api.projects.listBranches({ projectPath });
-        setBranches(result.branches);
-        setRemoteBranches(result.remoteBranches);
-        setRemoteBranchGroups(result.remoteBranchGroups);
-        setRecommendedTrunk(result.recommendedTrunk);
+        // Defensive: tolerate older backends/mocks that may omit newer fields.
+        setBranches(result.branches ?? []);
+        setRemoteBranches(result.remoteBranches ?? []);
+        setRemoteBranchGroups(result.remoteBranchGroups ?? []);
+        setRecommendedTrunk(result.recommendedTrunk ?? null);
       } catch (err) {
         console.error("Failed to load branches:", err);
       } finally {