feat: 扩展 Rust gateway 全功能模块，新增 billing/crypto/wallet crate 及完整数据层

- 新增 aether-billing、aether-crypto、aether-wallet 独立 crate
- aether-data 扩展 repository 层：announcements、auth_modules、billing、
  candidate_selection、gemini_file_mappings、global_models、management_tokens、
  oauth_providers、proxy_nodes、quota、users、wallet 等模块
- aether-gateway 新增 api/auth/billing/control/middleware/scheduler/usage/
  video_tasks/hooks/maintenance/model_fetch/provider_transport 等功能模块
- 重构 executor decision 和 gateway state 为模块目录结构
- 新增 gateway router、frontdoor 路由层及对应测试
- Python 侧 API 路由重构，新增 compat/support 模块
- 前端 Logo 组件更新及 Provider 管理页面调整

tests/api/public/test_system_catalog_rust.py

@@ -5,6 +5,7 @@ from unittest.mock import AsyncMock, MagicMock
 
 import httpx
 import pytest
+from fastapi import HTTPException
 
 
 def _build_provider_fixture() -> SimpleNamespace:
@@ -65,10 +66,7 @@ async def test_test_connection_prefers_rust_executor(
     rust_call = AsyncMock(return_value=rust_response)
     monkeypatch.setattr(mod, "_try_rust_test_connection_response", rust_call)
 
-    get_upstream_client = AsyncMock(side_effect=AssertionError("python upstream client should not be used"))
-    monkeypatch.setattr(mod.HTTPClientPool, "get_upstream_client", get_upstream_client)
-
-    result = await mod.test_connection(
+    result = await mod._test_connection_response(
         request=SimpleNamespace(query_params={}),
         db=MagicMock(),
         provider=None,
@@ -79,11 +77,10 @@ async def test_test_connection_prefers_rust_executor(
     assert result["status"] == "success"
     assert result["response_id"] == "resp_rust"
     rust_call.assert_awaited_once()
-    get_upstream_client.assert_not_awaited()
 
 
 @pytest.mark.asyncio
-async def test_test_connection_fallback_uses_transport_aware_client(
+async def test_test_connection_returns_503_when_rust_unavailable(
     monkeypatch: pytest.MonkeyPatch,
 ) -> None:
     from src.api.public import system_catalog as mod
@@ -105,38 +102,29 @@ async def test_test_connection_fallback_uses_transport_aware_client(
         lambda *_args, **_kwargs: "https://upstream.test/v1/chat/completions",
     )
 
-    proxy_config = {"enabled": True, "url": "http://proxy.test:8080"}
-    delegate_cfg = {"node_id": "node-1", "tunnel": True}
     monkeypatch.setattr(
         mod,
         "_build_test_connection_transport_context",
-        AsyncMock(return_value=(proxy_config, delegate_cfg, None)),
+        AsyncMock(return_value=({"enabled": True}, {"node_id": "node-1", "tunnel": True}, None)),
     )
-    monkeypatch.setattr(mod, "_try_rust_test_connection_response", AsyncMock(return_value=None))
+    monkeypatch.setattr(
+        mod,
+        "_try_rust_test_connection_response",
+        AsyncMock(
+            side_effect=HTTPException(
+                status_code=503,
+                detail="System catalog test-connection requires Rust executor",
+            )
+        ),
+    )
+    with pytest.raises(HTTPException) as exc_info:
+        await mod._test_connection_response(
+            request=SimpleNamespace(query_params={}),
+            db=MagicMock(),
+            provider=None,
+            model="gpt-test",
+            api_format=None,
+        )
 
-    upstream_response = httpx.Response(
-        200,
-        request=httpx.Request("POST", "https://upstream.test/v1/chat/completions"),
-        json={"id": "resp_python"},
-    )
-    upstream_client = MagicMock()
-    upstream_client.post = AsyncMock(return_value=upstream_response)
-    get_upstream_client = AsyncMock(return_value=upstream_client)
-    monkeypatch.setattr(mod.HTTPClientPool, "get_upstream_client", get_upstream_client)
-
-    result = await mod.test_connection(
-        request=SimpleNamespace(query_params={}),
-        db=MagicMock(),
-        provider=None,
-        model="gpt-test",
-        api_format=None,
-    )
-
-    assert result["status"] == "success"
-    assert result["response_id"] == "resp_python"
-    get_upstream_client.assert_awaited_once_with(delegate_cfg, proxy_config=proxy_config)
-    upstream_client.post.assert_awaited_once_with(
-        "https://upstream.test/v1/chat/completions",
-        json={"model": "gpt-test"},
-        headers={"authorization": "Bearer test"},
-    )
+    assert exc_info.value.status_code == 503
+    assert exc_info.value.detail == "System catalog test-connection requires Rust executor"