chore: fix opts as suggested

opts.go

@@ -378,7 +378,7 @@ var DeleteOptions = struct {
 	AllNotUnread     Opt
 	All              Opt
 }{
-	func(id int) Opt { return resultReporting.Resolve(id) },
+	func(id int) Opt { return delOpts.Resolve(id) },
 
 	delOpts[0], delOpts[1], delOpts[2], delOpts[3], delOpts[4],
 }
@@ -401,7 +401,7 @@ var MessageFlags = struct {
 	Sent   Opt
 	Any    Opt
 }{
-	func(id int) Opt { return resultReporting.Resolve(id) },
+	func(id int) Opt { return msgFlags.Resolve(id) },
 
 	msgFlags[0], msgFlags[1], msgFlags[2], msgFlags[3], msgFlags[4],
 }

opts_test.go

@@ -23,4 +23,28 @@ func TestResolve(t *testing.T) {
 	assert.Equal(t, opt, ServiceStates.Resolve(1))
 }
 
+// Test DeleteOptions field access and resolve function.
+func TestDeleteOptions(t *testing.T) {
+	t.Parallel()
+
+	assert.Equal(t, 0, DeleteOptions.Index.ID)
+	assert.Equal(t, "Delete message by index", DeleteOptions.Index.Description)
+	assert.Equal(t, 4, DeleteOptions.All.ID)
+	assert.Equal(t, "Delete all messages", DeleteOptions.All.Description)
+	assert.Equal(t, DeleteOptions.Index, DeleteOptions.Resolve(0))
+	assert.Equal(t, DeleteOptions.All, DeleteOptions.Resolve(4))
+}
+
+// Test MessageFlags field access and resolve function.
+func TestMessageFlags(t *testing.T) {
+	t.Parallel()
+
+	assert.Equal(t, 0, MessageFlags.Unread.ID)
+	assert.Equal(t, "Unread", MessageFlags.Unread.Description)
+	assert.Equal(t, 4, MessageFlags.Any.ID)
+	assert.Equal(t, "Any", MessageFlags.Any.Description)
+	assert.Equal(t, MessageFlags.Unread, MessageFlags.Resolve(0))
+	assert.Equal(t, MessageFlags.Any, MessageFlags.Resolve(4))
+}
+
 // TODO: complete this suite in case of 100% coverage needed.