Remove the fixed Account Type row from the profile page (closes #401)

The profile page no longer shows the fixed "Account Type: Standard User" row. webhooker has one account, the administrator it creates, and no account types, so the row was untrue. The Account Information section now lists the username alone, and a test checks the row stays gone.

Model: opus-5-5

internal/handlers/profile_test.go

@@ -88,6 +88,8 @@ func TestHandleProfile_OwnProfile_OK(t *testing.T) {
 	h.HandleProfile().ServeHTTP(w, req)
 
 	assert.Equal(t, http.StatusOK, w.Code)
+	assert.Contains(t, w.Body.String(), "Account Information")
+	assert.NotContains(t, w.Body.String(), "Account Type")
 }
 
 func TestHandleProfile_OtherProfile_Forbidden(t *testing.T) {