fix(slides): declare screenshot scope

Author: ethan-zhx

shortcuts/slides/slides_screenshot.go

@@ -37,9 +37,7 @@ var SlidesScreenshot = common.Shortcut{
 	Command:     "+screenshot",
 	Description: "Save up to 10 slide screenshots to local files without printing Base64 image data",
 	Risk:        "read",
-	Scopes:      []string{},
-	// The screenshot API is allowlist-gated for only a few apps, so do not
-	// advertise/preflight its scope. Let the API fail and let callers degrade.
+	Scopes:      []string{"slides:presentation:screenshot"},
 	// wiki:node:read is required only when --presentation is a wiki URL.
 	ConditionalScopes: []string{"wiki:node:read"},
 	AuthTypes:         []string{"user", "bot"},

shortcuts/slides/slides_screenshot_test.go

@@ -8,6 +8,7 @@ import (
 	"encoding/json"
 	"os"
 	"path/filepath"
+	"reflect"
 	"strings"
 	"testing"
 
@@ -17,23 +18,19 @@ import (
 )
 
 func TestSlidesScreenshotDeclaredScopes(t *testing.T) {
-	if got := SlidesScreenshot.ScopesForIdentity("user"); len(got) != 0 {
-		t.Fatalf("user preflight scopes = %#v, want empty", got)
+	base := []string{"slides:presentation:screenshot"}
+	if got := SlidesScreenshot.ScopesForIdentity("user"); !reflect.DeepEqual(got, base) {
+		t.Fatalf("user preflight scopes = %#v, want %#v", got, base)
 	}
-	if got := SlidesScreenshot.ScopesForIdentity("bot"); len(got) != 0 {
-		t.Fatalf("bot preflight scopes = %#v, want empty", got)
+	if got := SlidesScreenshot.ScopesForIdentity("bot"); !reflect.DeepEqual(got, base) {
+		t.Fatalf("bot preflight scopes = %#v, want %#v", got, base)
 	}
 
 	got := SlidesScreenshot.DeclaredScopesForIdentity("user")
-	want := []string{"wiki:node:read"}
-	if len(got) != len(want) || got[0] != want[0] {
+	want := []string{"slides:presentation:screenshot", "wiki:node:read"}
+	if !reflect.DeepEqual(got, want) {
 		t.Fatalf("declared scopes = %#v, want %#v", got, want)
 	}
-	for _, scope := range got {
-		if scope == "slides:presentation:screenshot" {
-			t.Fatalf("declared scopes must not advertise screenshot scope: %#v", got)
-		}
-	}
 }
 
 func TestSlidesScreenshotWritesFilesAndSuppressesBase64(t *testing.T) {

skills/lark-slides/references/lark-slides-screenshot.md

@@ -4,7 +4,7 @@
 
 获取幻灯片页面截图并保存为本地图片文件。默认用于已存在 PPT 页面截图；传入 `--content` 时用于直接渲染单个 `<slide>` XML 片段预览。本 shortcut 会在 CLI 进程内解码并写入文件，stdout 只返回文件路径、大小、页面 ID 等元信息，避免把图片 Base64 输出给模型。
 
-注意：该截图能力受应用白名单限制，绝大多数应用不可用。截图失败时不要引导用户申请 `slides:presentation:screenshot` 权限；记录错误后降级到 XML 读回、结构 lint、文本重叠检查等非截图检查路径。
+截图失败则降级到 XML 读回、结构 lint等非截图检查路径。
 
 ## 命令