test(mobile): give the server-workspaces test rows every Worktree field

The tests-typecheck ratchet checks mobile test files; the fixture row was missing required
Worktree members, so the file no longer typechecked.

Claude-Session: https://claude.ai/code/session_01JNnE9qzUZMMnqpZWCqM3nb

mobile/src/worktree/server-workspaces.test.ts

@@ -18,7 +18,13 @@ function row(worktreeId: string): Worktree {
     repo: 'orca',
     branch: 'main',
     displayName: worktreeId,
-    path: `/srv/${worktreeId}`
+    path: `/srv/${worktreeId}`,
+    liveTerminalCount: 0,
+    hasAttachedPty: false,
+    preview: '',
+    unread: false,
+    isPinned: false,
+    linkedPR: null
   }
 }