feat: 增加 SafeW 已监控群列表接口

通过 getUpdates 将群写入 Redis，供创建/编辑渠道时选择 chat_id，避免前端重复传递 token。

internal/adapter/safew_chats_test.go

@@ -0,0 +1,120 @@
+package adapter
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestGroupsFromUpdatesKeepsGroupsDropsPrivate(t *testing.T) {
+	body := []byte(`{
+		"ok": true,
+		"result": [
+			{"update_id": 100000001, "message": {"chat": {"id": 10000778141, "type": "group", "title": "测试AI"}}},
+			{"update_id": 100000002, "message": {"chat": {"id": 11, "type": "private", "first_name": "u"}}},
+			{"update_id": 100000003, "my_chat_member": {"chat": {"id": 22, "type": "supergroup", "title": "SG", "username": "sg_name"}}}
+		]
+	}`)
+	chats, maxID, err := GroupsFromUpdates(body)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if maxID != 100000003 {
+		t.Fatalf("maxID=%d", maxID)
+	}
+	if len(chats) != 2 {
+		t.Fatalf("len=%d want 2: %#v", len(chats), chats)
+	}
+	byID := map[string]SafewChat{}
+	for _, c := range chats {
+		byID[c.ID] = c
+	}
+	g := byID["10000778141"]
+	if g.Type != "group" || g.Title != "测试AI" {
+		t.Fatalf("group: %#v", g)
+	}
+	raw, _ := json.Marshal(g)
+	var m map[string]any
+	_ = json.Unmarshal(raw, &m)
+	if _, ok := m["id"].(string); !ok {
+		t.Fatalf("id JSON type = %T, want string", m["id"])
+	}
+	sg := byID["22"]
+	if sg.Username == nil || *sg.Username != "sg_name" {
+		t.Fatalf("username: %#v", sg)
+	}
+}
+
+func TestFilterSafewChats(t *testing.T) {
+	chats := []SafewChat{
+		{ID: "10000778141", Type: "group", Title: "测试AI"},
+		{ID: "99", Type: "group", Title: "ops"},
+	}
+	got := FilterSafewChats(chats, "测试")
+	if len(got) != 1 || got[0].ID != "10000778141" {
+		t.Fatalf("%#v", got)
+	}
+	got = FilterSafewChats(chats, "10000778141")
+	if len(got) != 1 || got[0].Title != "测试AI" {
+		t.Fatalf("%#v", got)
+	}
+	got = FilterSafewChats(chats, "")
+	if len(got) != 2 {
+		t.Fatalf("empty q should keep all, got %d", len(got))
+	}
+}
+
+func TestPollGroupChatsSuccess(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/bottok/getUpdates" {
+			t.Errorf("path=%s", r.URL.Path)
+		}
+		raw, _ := io.ReadAll(r.Body)
+		var body map[string]any
+		_ = json.Unmarshal(raw, &body)
+		if body["timeout"] != float64(0) {
+			t.Errorf("timeout=%v", body["timeout"])
+		}
+		if body["offset"] != float64(5) {
+			t.Errorf("offset=%v", body["offset"])
+		}
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte(`{"ok":true,"result":[{"update_id":10,"message":{"chat":{"id":10000778141,"type":"group","title":"测试AI"}}}]}`))
+	}))
+	defer srv.Close()
+
+	s := &SafeWSender{apiBase: srv.URL}
+	chats, next, err := s.PollGroupChats("tok", 5, 0)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if next != 11 {
+		t.Fatalf("next=%d want 11", next)
+	}
+	if len(chats) != 1 || chats[0].ID != "10000778141" {
+		t.Fatalf("%#v", chats)
+	}
+}
+
+func TestPollGroupChatsUnauthorized(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusUnauthorized)
+		_, _ = w.Write([]byte(`{"ok":false,"error_code":401,"description":"BOT_TOKEN_INVALID"}`))
+	}))
+	defer srv.Close()
+	s := &SafeWSender{apiBase: srv.URL}
+	_, _, err := s.PollGroupChats("bad", 0, 0)
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	ae, ok := err.(*SafewAuthError)
+	if !ok {
+		t.Fatalf("type %T %v", err, err)
+	}
+	if !strings.Contains(ae.Description, "BOT_TOKEN_INVALID") {
+		t.Fatalf("%q", ae.Description)
+	}
+}