完善 Antigravity 与 Gemini 跨格式兼容

crates/aether-provider-transport/src/conversion.rs

@@ -4,6 +4,7 @@ use aether_ai_formats::formats::matrix::{
 };
 use aether_ai_formats::normalize_api_format_alias;
 
+use crate::antigravity::is_antigravity_provider_transport;
 use crate::auth::{
     resolve_local_gemini_auth, resolve_local_openai_bearer_auth, resolve_local_standard_auth,
 };
@@ -132,6 +133,11 @@ pub fn request_conversion_transport_unsupported_reason(
     {
         return local_windsurf_request_transport_unsupported_reason_with_network(transport);
     }
+    if is_antigravity_provider_transport(transport)
+        && normalize_api_format_alias(&transport.endpoint.api_format) == "gemini:generate_content"
+    {
+        return None;
+    }
 
     match normalize_api_format_alias(&transport.endpoint.api_format).as_str() {
         "openai:chat" => local_openai_chat_transport_unsupported_reason(transport),
@@ -658,6 +664,32 @@ mod tests {
         );
     }
 
+    #[test]
+    fn antigravity_gemini_transport_supports_standard_cross_format_conversion_via_envelope() {
+        let transport = transport_snapshot(
+            "antigravity",
+            "gemini:generate_content",
+            "oauth",
+            true,
+            None,
+        );
+
+        assert!(request_pair_allowed_for_transport(
+            &transport,
+            "openai:chat",
+            "gemini:generate_content"
+        ));
+        assert!(request_pair_allowed_for_transport(
+            &transport,
+            "openai:responses",
+            "gemini:generate_content"
+        ));
+        assert!(request_conversion_transport_supported(
+            &transport,
+            RequestConversionKind::ToGeminiStandard
+        ));
+    }
+
     #[test]
     fn vertex_gemini_embedding_transport_supports_openai_embedding_conversion() {
         let transport = transport_snapshot("vertex_ai", "gemini:embedding", "api_key", true, None);