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

crates/aether-gateway/src/handlers/proxy/local.rs

@@ -0,0 +1,168 @@
+async fn maybe_build_local_internal_proxy_response(
+    state: &AppState,
+    request_context: &GatewayPublicRequestContext,
+    remote_addr: &std::net::SocketAddr,
+    request_body: Option<&axum::body::Bytes>,
+    legacy_internal_gateway_allowed: bool,
+) -> Result<Option<Response<Body>>, GatewayError> {
+    maybe_build_local_internal_proxy_response_impl(
+        state,
+        request_context,
+        remote_addr,
+        request_body,
+        legacy_internal_gateway_allowed,
+    )
+    .await
+}
+
+async fn maybe_build_local_admin_proxy_response(
+    state: &AppState,
+    request_context: &GatewayPublicRequestContext,
+    request_body: Option<&axum::body::Bytes>,
+) -> Result<Option<Response<Body>>, GatewayError> {
+    let Some(decision) = request_context.control_decision.as_ref() else {
+        return Ok(None);
+    };
+    if decision.route_class.as_deref() != Some("admin_proxy") {
+        return Ok(None);
+    }
+    if decision.admin_principal.is_none() {
+        return Ok(None);
+    }
+
+    if let Some(response) =
+        maybe_build_local_admin_provider_oauth_response(state, request_context, request_body)
+            .await?
+    {
+        return Ok(Some(response));
+    }
+
+    if let Some(response) =
+        maybe_build_local_admin_announcements_response(state, request_context, request_body)
+            .await?
+    {
+        return Ok(Some(response));
+    }
+
+    if let Some(response) =
+        maybe_build_local_admin_core_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+
+    if let Some(response) =
+        maybe_build_local_admin_global_models_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+
+    if let Some(response) =
+        maybe_build_local_admin_provider_models_response(state, request_context, request_body)
+            .await?
+    {
+        return Ok(Some(response));
+    }
+
+    if let Some(response) =
+        maybe_build_local_admin_providers_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_provider_ops_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_adaptive_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_provider_strategy_response(state, request_context, request_body)
+            .await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_pool_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_billing_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_payments_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_provider_query_response(state, request_context, request_body)
+            .await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_security_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) = maybe_build_local_admin_stats_response(state, request_context).await? {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_monitoring_response(state, request_context).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_usage_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_video_tasks_response(state, request_context).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_proxy_nodes_response(state, request_context).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_wallets_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_api_keys_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_ldap_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_gemini_files_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_users_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+    if let Some(response) =
+        maybe_build_local_admin_endpoints_response(state, request_context, request_body).await?
+    {
+        return Ok(Some(response));
+    }
+
+    Ok(None)
+}