fix: align listRefs and getHead with panproto-xrpc wire format panproto-xrpc's NodeClient expects: - listRefs: { refs: [{ name, target }] } (we returned { ref, target }) - getHead: flat { branch } or { detached } (we wrapped in { head: { type, ref } }) This caused git-remote-cospan push to fail with "ref entry 0 missing 'name' field". Now aligned so git-remote-cospan can successfully push pre-parsed schemas to the node.

2525             name: params.repo.clone(),
2626         })?;
2727 
28+    // Flat format matches panproto-xrpc NodeClient expectations.
2829     let head_json = match head {
2930         panproto_core::vcs::HeadState::Branch(name) => serde_json::json!({
30-            "type": "branch",
31-            "ref": name,
31+            "branch": name,
3232         }),
3333         panproto_core::vcs::HeadState::Detached(id) => serde_json::json!({
34-            "type": "detached",
35-            "target": id.to_string(),
34+            "detached": id.to_string(),
3635         }),
3736     };
3837 
39-    Ok(Json(serde_json::json!({ "head": head_json })))
38+    Ok(Json(head_json))
4039 }

2525             let refs_json: Vec<serde_json::Value> = refs
2626                 .into_iter()
2727                 .map(|(name, id)| {
28-                    serde_json::json!({ "ref": name, "target": id.to_string() })
28+                    serde_json::json!({ "name": name, "target": id.to_string() })
2929                 })
3030                 .collect();
3131             return Ok(Json(serde_json::json!({ "refs": refs_json })));

4848             let Some(name) = r.name() else { continue };
4949             let Some(oid) = r.target() else { continue };
5050             refs_json.push(serde_json::json!({
51-                "ref": name,
51+                "name": name,
5252                 "target": oid.to_string(),
5353             }));
5454         }