feat(pr): add --login flag to filter list by issue author

doc/changes/pr-list-login-filter.md

@@ -0,0 +1,33 @@
+# PR 列表按作者过滤
+
+## Summary
+
+`pr +list` 新增 `--login` 参数，可按 Issue 作者（`issue.author.login`）过滤返回的 Pull Request 列表。
+
+## 新增 Flag
+
+| Flag | 说明 |
+|------|------|
+| `--login` | 按 Issue 作者的 login 过滤 PR（不区分大小写） |
+
+## 实现细节
+
+GitLink PR 列表 API 不支持服务端按作者过滤，因此本功能在客户端对返回结果进行过滤。过滤逻辑：
+
+- 匹配 `issue.author.login` 字段
+- 不区分大小写
+- 过滤后自动更新 `total_count` 和 `meta.total_count` 以反映实际数量
+
+## 示例
+
+```bash
+# 列出 alice 提交的所有 PR
+gitlink-cli pr +list --owner Gitlink --repo gitlink-cli --login alice
+
+# 结合其他筛选条件
+gitlink-cli pr +list --owner Gitlink --repo gitlink-cli --login alice --state open
+
+# 列出已合并的 PR
+gitlink-cli pr +list --login bob --state merged
+```
+

shortcuts/pr/pr.go

@@ -45,6 +45,7 @@ func Shortcuts(translators ...*i18n.Translator) []*common.Shortcut {
 				{Name: "assignee-id", Usage: tr.T("flag.pr.assignee_id")},
 				{Name: "sort-by", Usage: tr.T("flag.sort_by")},
 				{Name: "sort-direction", Usage: tr.T("flag.sort_direction")},
+				{Name: "login", Usage: "Filter pull requests by issue author login"},
 				{Name: "page", Short: "p", Usage: tr.T("flag.page"), Default: "1"},
 				{Name: "limit", Short: "l", Usage: tr.T("flag.limit"), Default: "20"},
 			},
@@ -86,6 +87,9 @@ func Shortcuts(translators ...*i18n.Translator) []*common.Shortcut {
 				if err != nil {
 					return err
 				}
+				if login := ctx.Arg("login"); login != "" {
+					filterPullsByLogin(env, login)
+				}
 				return ctx.Output(env)
 			},
 		},
@@ -559,3 +563,49 @@ func numberField(m map[string]interface{}, key string) (float64, bool) {
 		return 0, false
 	}
 }
+
+// filterPullsByLogin filters the pulls list in-place, keeping only items
+// whose issue.author.login matches the given login (case-insensitive).
+func filterPullsByLogin(env *output.Envelope, login string) {
+	if env == nil || env.Data == nil {
+		return
+	}
+	data, ok := env.Data.(map[string]interface{})
+	if !ok {
+		return
+	}
+	rawPulls, ok := data["pulls"]
+	if !ok {
+		return
+	}
+	pulls, ok := rawPulls.([]interface{})
+	if !ok {
+		return
+	}
+	loginLower := strings.ToLower(login)
+	filtered := make([]interface{}, 0, len(pulls))
+	for _, item := range pulls {
+		pull, ok := item.(map[string]interface{})
+		if !ok {
+			continue
+		}
+		issue, ok := pull["issue"].(map[string]interface{})
+		if !ok {
+			continue
+		}
+		author, ok := issue["author"].(map[string]interface{})
+		if !ok {
+			continue
+		}
+		authorLogin, _ := author["login"].(string)
+		if strings.ToLower(authorLogin) == loginLower {
+			filtered = append(filtered, item)
+		}
+	}
+	data["pulls"] = filtered
+	// Update total_count in data to reflect filtered count
+	data["total_count"] = float64(len(filtered))
+	if env.Meta != nil {
+		env.Meta.TotalCount = len(filtered)
+	}
+}

shortcuts/pr/pr_test.go

@@ -157,6 +157,51 @@ func TestPRListWithFilters(t *testing.T) {
 	}
 }
 
+func TestPRListWithLoginFilter(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/v1/owner/repo/pulls.json" {
+			t.Fatalf("unexpected path: %s", r.URL.Path)
+		}
+		writeJSON(t, w, map[string]interface{}{
+			"pulls": []interface{}{
+				map[string]interface{}{
+					"id":    float64(1),
+					"title": "PR by alice",
+					"issue": map[string]interface{}{
+						"author": map[string]interface{}{"login": "alice"},
+					},
+				},
+				map[string]interface{}{
+					"id":    float64(2),
+					"title": "PR by bob",
+					"issue": map[string]interface{}{
+						"author": map[string]interface{}{"login": "bob"},
+					},
+				},
+				map[string]interface{}{
+					"id":    float64(3),
+					"title": "PR by Alice (uppercase)",
+					"issue": map[string]interface{}{
+						"author": map[string]interface{}{"login": "Alice"},
+					},
+				},
+			},
+			"total_count": float64(3),
+		})
+	}))
+	defer server.Close()
+
+	err := runPRShortcut(t, server, "list", map[string]string{
+		"state": "open",
+		"login": "alice",
+		"page":  "1",
+		"limit": "20",
+	})
+	if err != nil {
+		t.Fatalf("list with login filter failed: %v", err)
+	}
+}
+
 func TestPRListStateAllOmitsStatus(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.URL.Path != "/v1/owner/repo/pulls.json" {