H-337: fix Web Channel availability and realtime delivery (#60)

* H-337: fix Web Channel availability and realtime delivery

* fix(widget): preserve realtime sender and activity contracts

* fix(widget): keep realtime sender payloads consistent

* fix(widget): make public message persistence atomic

* fix(inbox): keep availability projection out of schema

---------

Co-authored-by: Rogee <rogee@ipao.vip>

backend/internal/repository/inbox_member_repo.go

@@ -41,10 +41,29 @@ func (r *InboxMemberRepo) FindByInboxAndUser(ctx context.Context, inboxID, userI
 
 // FindByInbox retrieves all members (agents) assigned to an inbox.
 func (r *InboxMemberRepo) FindByInbox(ctx context.Context, inboxID uint) ([]model.InboxMember, error) {
-	var ims []model.InboxMember
-	err := r.withAgentPreloads(r.db.WithContext(ctx)).Where("inbox_id = ?", inboxID).
-		Order("id ASC").Find(&ims).Error
-	return ims, err
+	type inboxMemberWithAvailability struct {
+		model.InboxMember   `gorm:"embedded"`
+		AccountAvailability string `gorm:"column:account_availability"`
+	}
+
+	var rows []inboxMemberWithAvailability
+	err := r.withAgentPreloads(r.db.WithContext(ctx)).
+		Model(&model.InboxMember{}).
+		Select("inbox_members.*, COALESCE(account_users.availability, 'offline') AS account_availability").
+		Joins("LEFT JOIN inboxes ON inboxes.id = inbox_members.inbox_id").
+		Joins("LEFT JOIN account_users ON account_users.account_id = inboxes.account_id AND account_users.user_id = inbox_members.user_id AND account_users.deleted_at IS NULL").
+		Where("inbox_members.inbox_id = ?", inboxID).
+		Order("inbox_members.id ASC").Find(&rows).Error
+	if err != nil {
+		return nil, err
+	}
+
+	ims := make([]model.InboxMember, len(rows))
+	for i := range rows {
+		ims[i] = rows[i].InboxMember
+		ims[i].AccountAvailability = rows[i].AccountAvailability
+	}
+	return ims, nil
 }
 
 // FindByUser retrieves all inboxes a user is assigned to.

backend/internal/repository/inbox_member_repo_test.go

@@ -103,11 +103,12 @@ func TestInboxMemberRepo_FindByInbox(t *testing.T) {
 	db := setupTestDB(t, &model.InboxMember{})
 	repo := NewInboxMemberRepo(db)
 
-	_, user1, inbox := createInboxMemberPrereqs(t, db)
+	account, user1, inbox := createInboxMemberPrereqs(t, db)
 
 	// Create a second user
 	user2 := &model.User{Name: "IMTestUser2", Email: "im2@example.com", Provider: "email"}
 	require.NoError(t, db.Create(user2).Error)
+	require.NoError(t, db.Create(&model.AccountUser{AccountID: account.ID, UserID: user1.ID, Role: "agent", Availability: "online"}).Error)
 
 	im1 := &model.InboxMember{InboxID: inbox.ID, UserID: user1.ID, Role: "agent"}
 	require.NoError(t, db.Create(im1).Error)
@@ -121,6 +122,8 @@ func TestInboxMemberRepo_FindByInbox(t *testing.T) {
 	// Verify User is preloaded
 	assert.Equal(t, "IMTestUser", members[0].User.Name)
 	assert.Equal(t, "IMTestUser2", members[1].User.Name)
+	assert.Equal(t, "online", members[0].AccountAvailability)
+	assert.Equal(t, "offline", members[1].AccountAvailability)
 
 	// Verify ordering by ID ASC
 	assert.Equal(t, im1.ID, members[0].ID)
@@ -240,4 +243,4 @@ func TestInboxMemberRepo_DeleteByInbox(t *testing.T) {
 	members, err := repo.FindByInbox(context.Background(), inbox.ID)
 	assert.NoError(t, err)
 	assert.Len(t, members, 0)
-}
+}