feat: 编辑器实时探测并显示已关联虚拟环境

fix: 按系统 ANSI 代码页解码子进程输出，修复中文日志乱码

backend/src/api.rs

@@ -14,6 +14,9 @@ use utoipa::{OpenApi, ToSchema};
 use crate::{
     cron::{self, CronPreviewRequest, CronPreviewResponse},
     error::{ApiError, ApiJson, ApiResult, ErrorResponse},
+    python_env::{
+        self, InterpreterKind, VenvProbeRequest, VenvProbeResponse, VenvProbeStatus, VenvSource,
+    },
     runs::{
         model::{LogChunkResponse, TaskRunListResponse, TaskRunResponse},
         routes::{
@@ -107,6 +110,25 @@ pub async fn preview_cron(
     Ok(Json(preview))
 }
 
+#[utoipa::path(
+    post,
+    path = "/api/v1/python/venv",
+    tag = "system",
+    request_body = VenvProbeRequest,
+    responses(
+        (status = 200, description = "Detected Python virtual environment", body = VenvProbeResponse),
+        (status = 400, description = "Invalid venv probe request", body = ErrorResponse)
+    )
+)]
+pub async fn probe_python_venv(
+    ApiJson(request): ApiJson<VenvProbeRequest>,
+) -> ApiResult<Json<VenvProbeResponse>> {
+    tokio::task::spawn_blocking(move || python_env::probe_venv(&request))
+        .await
+        .map(Json)
+        .map_err(ApiError::internal)
+}
+
 #[derive(OpenApi)]
 #[openapi(
     info(
@@ -118,6 +140,7 @@ pub async fn preview_cron(
         health,
         session,
         preview_cron,
+        probe_python_venv,
         list_tasks,
         create_task,
         get_task,
@@ -138,6 +161,11 @@ pub async fn preview_cron(
         SessionResponse,
         CronPreviewRequest,
         CronPreviewResponse,
+        VenvProbeRequest,
+        VenvProbeResponse,
+        VenvProbeStatus,
+        VenvSource,
+        InterpreterKind,
         ErrorResponse,
         TaskActionType,
         HttpMethod,
@@ -183,6 +211,10 @@ pub fn router(state: AppState) -> Router {
         .route("/api/v1/health", get(health))
         .route("/api/v1/session", get(session))
         .route("/api/v1/cron/preview", axum::routing::post(preview_cron))
+        .route(
+            "/api/v1/python/venv",
+            axum::routing::post(probe_python_venv),
+        )
         .route("/api/v1/openapi.json", get(openapi_json))
         .merge(crate::tasks::routes::router())
         .merge(crate::runs::routes::router())