fix(quick-260504-414-01): 修复路径联想——按父目录查询+前缀过滤

PathAutocomplete 现在会解析输入值中的父目录和过滤前缀：
- /Users/zaneliu/P → 查询 /Users/zaneliu，过滤以 P 开头的子目录
- 选中 Projects 后补全为 /Users/zaneliu/Projects

后端 API 对不存在的路径和普通文件也返回空列表（而非 404/400），
让自动补全体验更流畅。

Author: ZaneL1u

internal/controlplane/http/admin_host_files.go

@@ -47,15 +47,15 @@ func (h *AdminHostFilesHandler) List() nethttp.Handler {
 		info, err := os.Stat(cleaned)
 		if err != nil {
 			if os.IsNotExist(err) {
-				writeJSON(w, nethttp.StatusNotFound, map[string]string{"error": "path not found"})
+				writeJSON(w, nethttp.StatusOK, map[string]any{"entries": []string{}})
 				return
 			}
 			h.logger.Error("stat path failed", "path", cleaned, "error", err)
 			writeJSON(w, nethttp.StatusInternalServerError, map[string]string{"error": "unable to read path"})
 			return
 		}
 		if !info.IsDir() {
-			writeJSON(w, nethttp.StatusBadRequest, map[string]string{"error": "path is not a directory"})
+			writeJSON(w, nethttp.StatusOK, map[string]any{"entries": []string{}})
 			return
 		}
 

internal/controlplane/http/admin_host_files_test.go

@@ -86,8 +86,11 @@ func TestAdminHostFiles_NotFound(t *testing.T) {
 	rr := httptest.NewRecorder()
 	h.List().ServeHTTP(rr, req)
 
-	if rr.Code != http.StatusNotFound {
-		t.Fatalf("expected 404, got %d: %s", rr.Code, rr.Body.String())
+	if rr.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
+	}
+	if !strings.Contains(rr.Body.String(), `"entries"`) {
+		t.Errorf("expected empty entries array, got %s", rr.Body.String())
 	}
 }
 
@@ -98,8 +101,11 @@ func TestAdminHostFiles_NotADirectory(t *testing.T) {
 	rr := httptest.NewRecorder()
 	h.List().ServeHTTP(rr, req)
 
-	if rr.Code != http.StatusBadRequest {
-		t.Fatalf("expected 400, got %d: %s", rr.Code, rr.Body.String())
+	if rr.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", rr.Code, rr.Body.String())
+	}
+	if !strings.Contains(rr.Body.String(), `"entries"`) {
+		t.Errorf("expected empty entries array, got %s", rr.Body.String())
 	}
 }
 

web/admin/src/components/hosts/path-autocomplete.tsx

@@ -11,6 +11,18 @@ interface PathAutocompleteProps {
   className?: string;
 }
 
+function getQueryAndFilter(value: string): { queryPath: string; filter: string } {
+  if (value.endsWith("/")) {
+    return { queryPath: value.slice(0, -1) || "/", filter: "" };
+  }
+  const lastSlash = value.lastIndexOf("/");
+  if (lastSlash === -1) return { queryPath: "/", filter: value };
+  return {
+    queryPath: value.slice(0, lastSlash) || "/",
+    filter: value.slice(lastSlash + 1),
+  };
+}
+
 export function PathAutocomplete({
   value,
   onChange,
@@ -23,8 +35,14 @@ export function PathAutocomplete({
   const containerRef = useRef<HTMLDivElement>(null);
   const blurTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
 
-  const { data, isLoading } = useHostFiles(value);
-  const entries = data?.entries ?? [];
+  const { queryPath, filter } = getQueryAndFilter(value);
+  const { data, isLoading } = useHostFiles(queryPath);
+  const allEntries = data?.entries ?? [];
+  const entries = filter
+    ? allEntries.filter((e) =>
+        e.toLowerCase().startsWith(filter.toLowerCase()),
+      )
+    : allEntries;
 
   const showDropdown = open && value.startsWith("/");
 
@@ -42,8 +60,8 @@ export function PathAutocomplete({
 
   const handleSelect = useCallback(
     (entry: string) => {
-      const prefix = value.endsWith("/") ? value : value + "/";
-      onChange(prefix + entry);
+      const { queryPath: qp } = getQueryAndFilter(value);
+      onChange(qp === "/" ? "/" + entry : qp + "/" + entry);
       setOpen(false);
     },
     [value, onChange],