feat(feedback): show the sender's interface language and connector bot in admin

In the console feedback detail, show the sender's interface language (account
preferred_language) always, and — for a message that arrived through an external
connector (currently Telegram) — the bot they last used (en/ru, from the
account's service_language).

backend/internal/adminconsole/render_test.go

@@ -37,7 +37,7 @@ func TestRendererRendersEveryPage(t *testing.T) {
 		{"complaints", ComplaintsView{Items: []ComplaintRow{{ID: "c1", Word: "qi", Status: "open"}}, Status: "open", Pager: NewPager(1, 50, 1)}, "qi"},
 		{"messages", MessagesView{Items: []MessageRow{{ID: "m1", SenderID: "a1", SenderName: "Kaya", Source: "telegram", Body: "good luck", GameID: "g1"}}, Pager: NewPager(1, 50, 1)}, "good luck"},
 		{"feedback", FeedbackView{Items: []FeedbackRow{{ID: "f1", AccountID: "a1", SenderName: "Kaya", Source: "telegram", Channel: "web", HasAttachment: true, Replied: true}}, Status: "unread", Pager: NewPager(1, 50, 1)}, "replied"},
-		{"feedback_detail", FeedbackDetailView{ID: "f1", AccountID: "a1", SenderName: "Kaya", Channel: "ios", Body: "please fix the board", HasAttachment: true, AttachmentName: "shot.png", IsImage: true, Banned: true}, "please fix the board"},
+		{"feedback_detail", FeedbackDetailView{ID: "f1", AccountID: "a1", SenderName: "Kaya", Channel: "telegram", InterfaceLanguage: "en", BotLanguage: "ru", Body: "please fix the board", HasAttachment: true, AttachmentName: "shot.png", IsImage: true, Banned: true}, "bot: ru"},
 		{"complaint_detail", ComplaintDetailView{ID: "c1", Word: "qi", Variant: "scrabble_en"}, "Resolve"},
 		{"dictionary", DictionaryView{ActiveVersion: "v1.0.0", Variants: []VariantVersions{{Variant: "scrabble_en", Versions: []string{"v1.0.0"}}}, Changes: []DictChangeRow{{Variant: "scrabble_en", Word: "qi", Action: "add"}}}, "Update dictionaries"},
 		{"dictionary_preview", DictionaryPreviewView{Version: "v1.1.0", Token: "0123456789abcdef0123456789abcdef", ActiveVersion: "v1.0.0", Variants: []VariantDiffRow{{Variant: "scrabble_en", AddedCount: 2, RemovedCount: 1, AddedSample: []string{"qi", "za"}, RemovedSample: []string{"xqz"}, RemovedTruncated: true}}}, "v1.1.0"},

backend/internal/adminconsole/templates/pages/feedback_detail.gohtml

@@ -5,7 +5,8 @@
 <section class="panel"><h2>Message</h2>
 <ul class="kv">
 <li><b>From</b> <a href="/_gm/users/{{.AccountID}}">{{.SenderName}}</a> ({{.Source}})</li>
-<li><b>Channel</b> {{.Channel}}</li>
+<li><b>Channel</b> {{.Channel}}{{if .BotLanguage}} (bot: {{.BotLanguage}}){{end}}</li>
+<li><b>Interface language</b> {{.InterfaceLanguage}}</li>
 <li><b>IP</b> {{if .IP}}<code>{{.IP}}</code>{{else}}<span class="note">none</span>{{end}}</li>
 <li><b>Filed</b> {{.CreatedAt}}</li>
 <li><b>State</b> {{if .Archived}}archived{{else if .Read}}read{{else}}<span class="warn">unread</span>{{end}}</li>

backend/internal/adminconsole/views.go

@@ -404,21 +404,26 @@ type FeedbackRow struct {
 // user-controlled and rendered as plain auto-escaped text. IsImage gates the inline
 // <img> preview; Banned shows whether the sender already holds the feedback ban.
 type FeedbackDetailView struct {
-	ID             string
-	AccountID      string
-	SenderName     string
-	Source         string
-	Channel        string
-	IP             string
-	Body           string
-	HasAttachment  bool
-	AttachmentName string
-	IsImage        bool
-	Read           bool
-	Archived       bool
-	Replied        bool
-	ReplyBody      string
-	RepliedAt      string
-	CreatedAt      string
-	Banned         bool
+	ID         string
+	AccountID  string
+	SenderName string
+	Source     string
+	Channel    string
+	// InterfaceLanguage is the sender's interface language (account preference);
+	// BotLanguage is the connector bot they last used (en/ru), set only for a
+	// message that arrived through an external connector (Telegram).
+	InterfaceLanguage string
+	BotLanguage       string
+	IP                string
+	Body              string
+	HasAttachment     bool
+	AttachmentName    string
+	IsImage           bool
+	Read              bool
+	Archived          bool
+	Replied           bool
+	ReplyBody         string
+	RepliedAt         string
+	CreatedAt         string
+	Banned            bool
 }

backend/internal/server/handlers_admin_feedback.go

@@ -87,6 +87,14 @@ func (s *Server) consoleFeedbackDetail(c *gin.Context) {
 	if banned, err := s.accounts.HasRole(ctx, m.AccountID, account.RoleFeedbackBanned); err == nil {
 		view.Banned = banned
 	}
+	if acc, err := s.accounts.GetByID(ctx, m.AccountID); err == nil {
+		view.InterfaceLanguage = acc.PreferredLanguage
+		// The connector bot (the account's last service-language bot) is meaningful only
+		// for a message that arrived through an external connector — currently Telegram.
+		if m.Channel == "telegram" && acc.ServiceLanguage != "" {
+			view.BotLanguage = acc.ServiceLanguage
+		}
+	}
 	s.renderConsole(c, "feedback_detail", "feedback", "Feedback", view)
 }