feat(issue): support threaded replies via --reply-to and +comment-replies

- issue +comment --reply-to <id>: reply to an existing comment; the
  server requires both parent_id and reply_id, so both are set
- issue +comment-replies: list a comment's replies via the
  children_journals endpoint with --page/--limit

Production-verified: parent -> reply -> list replies -> delete
round-trip on a real issue. 3 new unit tests and bilingual docs.

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

README.md

@@ -356,6 +356,10 @@ gitlink-cli issue +batch-delete --owner Gitlink --repo forgeplus --ids 101,102 -
 # Add a comment
 gitlink-cli issue +comment --owner Gitlink --repo forgeplus -i 123 -b "Fixed"
 
+# Reply to a comment and list a comment's replies
+gitlink-cli issue +comment --owner Gitlink --repo forgeplus -i 123 -b "Agreed" --reply-to 456
+gitlink-cli issue +comment-replies --owner Gitlink --repo forgeplus -n 123 -c 456
+
 # List, edit, and delete issue comments
 gitlink-cli issue +comments --owner Gitlink --repo forgeplus -n 123 --category comment
 gitlink-cli issue +comment-edit --owner Gitlink --repo forgeplus -n 123 -c 456 -b "Updated"

README.zh-CN.md

@@ -367,6 +367,10 @@ gitlink-cli issue +batch-delete --owner Gitlink --repo forgeplus --ids 101,102 -
 # 添加评论
 gitlink-cli issue +comment --owner Gitlink --repo forgeplus -i 123 -b "已修复"
 
+# 回复评论并列出某条评论的回复
+gitlink-cli issue +comment --owner Gitlink --repo forgeplus -i 123 -b "同意" --reply-to 456
+gitlink-cli issue +comment-replies --owner Gitlink --repo forgeplus -n 123 -c 456
+
 # 列出、编辑、删除议题评论
 gitlink-cli issue +comments --owner Gitlink --repo forgeplus -n 123 --category comment
 gitlink-cli issue +comment-edit --owner Gitlink --repo forgeplus -n 123 -c 456 -b "更新内容"

internal/i18n/locales/en-US.json

@@ -44,6 +44,7 @@
   "cmd.issue.comment.short": "Add a comment to an issue",
   "cmd.issue.comment_delete.short": "Delete an issue comment",
   "cmd.issue.comment_edit.short": "Edit an issue comment",
+  "cmd.issue.comment_replies.short": "List replies to an issue comment",
   "cmd.issue.comments.short": "List issue comments",
   "cmd.issue.create.short": "Create a new issue",
   "cmd.issue.list.short": "List issues",
@@ -162,6 +163,7 @@
   "flag.issue.batch_process.limit": "Maximum issues to process, capped at 100",
   "flag.issue.body": "Issue description",
   "flag.issue.comment_id": "Comment (journal) ID from issue +comments",
+  "flag.issue.comment_reply_to": "Parent comment (journal) ID to reply to",
   "flag.issue.comments.category": "Filter: comment/operate (default: all)",
   "flag.issue.comments.keyword": "Search keyword in comment content",
   "flag.issue.label": "Label ID",

internal/i18n/locales/zh-CN.json

@@ -44,6 +44,7 @@
   "cmd.issue.comment.short": "给议题添加评论",
   "cmd.issue.comment_delete.short": "删除议题评论",
   "cmd.issue.comment_edit.short": "编辑议题评论",
+  "cmd.issue.comment_replies.short": "列出议题评论的回复",
   "cmd.issue.comments.short": "列出议题评论",
   "cmd.issue.create.short": "创建新议题",
   "cmd.issue.list.short": "列出议题",
@@ -162,6 +163,7 @@
   "flag.issue.batch_process.limit": "最多处理的议题数，上限 100",
   "flag.issue.body": "议题描述",
   "flag.issue.comment_id": "评论（journal）ID，可由 issue +comments 获取",
+  "flag.issue.comment_reply_to": "要回复的父评论（journal）ID",
   "flag.issue.comments.category": "筛选：comment/operate（默认：全部）",
   "flag.issue.comments.keyword": "评论内容搜索关键词",
   "flag.issue.label": "标签 ID",

shortcuts/issue/issue.go

@@ -274,6 +274,7 @@ func Shortcuts(translators ...*i18n.Translator) []*common.Shortcut {
 			Description: tr.T("cmd.issue.comment.short"),
 			Flags: appendIssueNumberFlags(
 				common.Flag{Name: "body", Short: "b", Usage: tr.T("flag.comment.body"), Required: true},
+				common.Flag{Name: "reply-to", Usage: tr.T("flag.issue.comment_reply_to")},
 			),
 			Run: func(ctx *common.RuntimeContext) error {
 				if err := ctx.ResolveOwnerRepo(); err != nil {
@@ -290,6 +291,14 @@ func Shortcuts(translators ...*i18n.Translator) []*common.Shortcut {
 				payload := map[string]interface{}{
 					"notes": body,
 				}
+				if replyTo := ctx.Arg("reply-to"); replyTo != "" {
+					id, err := strconv.Atoi(replyTo)
+					if err != nil {
+						return fmt.Errorf("--reply-to must be an integer, got %q", replyTo)
+					}
+					payload["parent_id"] = id
+					payload["reply_id"] = id
+				}
 				env, err := ctx.CallAPI("POST", fmt.Sprintf("%s/issues/%s/journals", v1RepoPath(ctx), number), payload)
 				if err != nil {
 					return err
@@ -330,6 +339,39 @@ func Shortcuts(translators ...*i18n.Translator) []*common.Shortcut {
 				return ctx.Output(env)
 			},
 		},
+		{
+			Name:        "comment-replies",
+			Description: tr.T("cmd.issue.comment_replies.short"),
+			Flags: appendIssueNumberFlags(
+				common.Flag{Name: "comment-id", Short: "c", Usage: tr.T("flag.issue.comment_id"), Required: true},
+				common.Flag{Name: "page", Short: "p", Usage: tr.T("flag.page"), Default: "1"},
+				common.Flag{Name: "limit", Short: "l", Usage: tr.T("flag.limit"), Default: "20"},
+			),
+			Run: func(ctx *common.RuntimeContext) error {
+				if err := ctx.ResolveOwnerRepo(); err != nil {
+					return err
+				}
+				number, err := issueNumberArg(ctx)
+				if err != nil {
+					return err
+				}
+				commentID, err := ctx.RequireArg("comment-id")
+				if err != nil {
+					return err
+				}
+				if _, err := strconv.Atoi(commentID); err != nil {
+					return fmt.Errorf("--comment-id must be an integer, got %q", commentID)
+				}
+				q := url.Values{}
+				q.Set("page", ctx.Arg("page"))
+				q.Set("limit", ctx.Arg("limit"))
+				env, err := ctx.CallAPIWithQuery("GET", fmt.Sprintf("%s/issues/%s/journals/%s/children_journals", v1RepoPath(ctx), number, commentID), q)
+				if err != nil {
+					return err
+				}
+				return ctx.Output(env)
+			},
+		},
 		{
 			Name:        "comment-edit",
 			Description: tr.T("cmd.issue.comment_edit.short"),

shortcuts/issue/issue_test.go

@@ -1210,3 +1210,56 @@ func TestIssueCommentDeleteRequiresCommentID(t *testing.T) {
 		t.Fatal("expected error when --comment-id is missing")
 	}
 }
+
+func TestIssueCommentReplyToSetsParentID(t *testing.T) {
+	var payload map[string]interface{}
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != "POST" || r.URL.Path != "/v1/owner/repo/issues/7/journals.json" {
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+		payload = decodeJSON(t, r)
+		writeJSON(t, w, map[string]interface{}{"id": float64(101)})
+	}))
+	defer server.Close()
+
+	err := runShortcut(t, server, "comment", map[string]string{
+		"number": "7", "body": "a reply", "reply-to": "99",
+	})
+	if err != nil {
+		t.Fatalf("comment failed: %v", err)
+	}
+	assertEqual(t, payload["notes"], "a reply")
+	assertEqual(t, payload["parent_id"], float64(99))
+	assertEqual(t, payload["reply_id"], float64(99))
+}
+
+func TestIssueCommentRepliesUsesChildrenJournalsPath(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != "GET" || r.URL.Path != "/v1/owner/repo/issues/7/journals/99/children_journals.json" {
+			t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+		}
+		writeJSON(t, w, map[string]interface{}{"total_count": float64(0), "journals": []interface{}{}})
+	}))
+	defer server.Close()
+
+	err := runShortcut(t, server, "comment-replies", map[string]string{
+		"number": "7", "comment-id": "99",
+	})
+	if err != nil {
+		t.Fatalf("comment-replies failed: %v", err)
+	}
+}
+
+func TestIssueCommentRepliesRejectsNonIntegerCommentID(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+	}))
+	defer server.Close()
+
+	err := runShortcut(t, server, "comment-replies", map[string]string{
+		"number": "7", "comment-id": "abc",
+	})
+	if err == nil {
+		t.Fatal("expected error for non-integer --comment-id")
+	}
+}