fix: add defensive checks for missing repositories in ProjectCard

- Prevents crashes when project.repositories is undefined
- ProjectsPage tests: 1 pre-existing failure, 7 passing

apps/web/src/components/features/project/ProjectCard.tsx

@@ -41,7 +41,7 @@ export const ProjectCard = ({
         <button className="project-toggle" onClick={onToggle} type="button" aria-expanded={expanded}>
           <Icon name={expanded ? "chevron-down" : "chevron-right"} size="sm" />
           <h3>{project.name}</h3>
-          {project.repositories.length > 0 && (
+          {project.repositories?.length > 0 && (
             <span className="repo-count">
               {project.repositories.length} repo{project.repositories.length > 1 ? "s" : ""}
             </span>
@@ -71,11 +71,11 @@ export const ProjectCard = ({
 
       {expanded && (
         <div className="project-detail">
-          {project.repositories.length === 0 ? (
+          {(project.repositories || []).length === 0 ? (
             <p className="muted">No repositories yet.</p>
           ) : (
             <div className="repo-list">
-              {project.repositories.map((repo) => (
+              {(project.repositories || []).map((repo) => (
                 <div key={repo.id} className="repo-block">
                   <div className="repo-header">
                     <h4>{repo.name}</h4>