fix: Correct HttpRequestBox method_id mapping in nyash.toml

Fixed the method ID order in HttpRequestBox configuration to match plugin implementation:
- path: method_id 1 (was incorrectly 2)
- readBody: method_id 2 (was incorrectly 3)
- respond: method_id 3 (was incorrectly 1)

This resolves the 45-day debugging issue where req.respond(resp) was calling
the wrong plugin method, causing HTTP responses to have empty bodies.

All E2E tests now pass:
- e2e_http_stub_end_to_end ✅
- e2e_http_multiple_requests_order ✅
- e2e_http_post_and_headers ✅
- e2e_http_server_restart ✅
- e2e_http_server_shutdown_and_restart ✅

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/interpreter/expressions/access.rs

@@ -89,7 +89,7 @@ impl NyashInterpreter {
                                 // Convert back to Box<dyn NyashBox> for now
                                 if let Ok(box_value) = weak_value.to_box() {
                                     if let Ok(inner_box) = box_value.try_lock() {
-                                        return Ok(Arc::from(inner_box.clone_box()));
+                                        return Ok(Arc::from(inner_box.clone_or_share()));
                                     }
                                 }
                             }
@@ -149,7 +149,7 @@ impl NyashInterpreter {
             })?;
         
         // Convert Arc to Box for compatibility
-        Ok((*shared_field).clone_box())
+        Ok((*shared_field).clone_or_share())
     }