Revert "fix: bind project container host ports to 0.0.0.0"

This reverts commit 810c8d4d72.

server/src/chat/transport/matrix/new_project.rs

@@ -913,11 +913,6 @@ pub async fn handle_new_project(
 /// to all interfaces, making Docker port forwarding reachable from the host.
 /// Without this the server defaults to `127.0.0.1` inside the container —
 /// reachable only from within the container itself, not via `docker -p`.
-///
-/// Host-side port mappings use `0.0.0.0` so the MCP and SSH endpoints are
-/// reachable from outside the docker host (not just from the host itself).
-/// `127.0.0.1` had been the conservative default but blocked remote MCP
-/// clients and out-of-host SSH onto the project container.
 fn project_docker_run_args(
     container_name: &str,
     port: u16,
@@ -932,9 +927,9 @@ fn project_docker_run_args(
         "--name".into(),
         container_name.to_string(),
         "-p".into(),
-        format!("0.0.0.0:{port}:3001"),
+        format!("127.0.0.1:{port}:3001"),
         "-p".into(),
-        format!("0.0.0.0:{ssh_port}:22"),
+        format!("127.0.0.1:{ssh_port}:22"),
         "-e".into(),
         "HUSKIES_HOST=0.0.0.0".into(),
         "-e".into(),
@@ -1353,39 +1348,6 @@ mod tests {
         );
     }
 
-    #[test]
-    fn project_docker_args_bind_host_ports_to_all_interfaces() {
-        // Project containers must be reachable from outside the docker host
-        // (remote MCP clients, ssh into the project container) — host-side
-        // mapping must use 0.0.0.0, not 127.0.0.1.
-        let args = project_docker_run_args(
-            "huskies-myapp",
-            3100,
-            2200,
-            "ssh-ed25519 AAAA...",
-            "Test User",
-            "test@example.com",
-        );
-        let pairs: Vec<_> = args.windows(2).collect();
-        assert!(
-            pairs
-                .iter()
-                .any(|w| w[0] == "-p" && w[1] == "0.0.0.0:3100:3001"),
-            "expected -p 0.0.0.0:3100:3001 in docker args, got: {args:?}"
-        );
-        assert!(
-            pairs
-                .iter()
-                .any(|w| w[0] == "-p" && w[1] == "0.0.0.0:2200:22"),
-            "expected -p 0.0.0.0:2200:22 in docker args, got: {args:?}"
-        );
-        assert!(
-            !pairs.iter().any(|w| w[0] == "-p"
-                && (w[1].starts_with("127.0.0.1:") || w[1] == "127.0.0.1")),
-            "host-side mapping must not be 127.0.0.1-restricted: {args:?}"
-        );
-    }
-
     #[test]
     fn interpret_docker_run_error_missing_image_points_at_script() {
         let stderr = "Unable to find image 'huskies-project-rust:latest' locally\n\