Fix int types in OpenSubsonic responses.

Refer to https://support.symfonium.app/t/symfonium-sync-crashes-when-tpos-is-not-an-int/4204

utils/number/number_test.go

@@ -13,10 +13,27 @@ func TestNumber(t *testing.T) {
 	RunSpecs(t, "Number Suite")
 }
 
-var _ = Describe("RandomInt64", func() {
-	It("should return a random int64", func() {
-		for i := 0; i < 10000; i++ {
-			Expect(number.RandomInt64(100)).To(BeNumerically("<", 100))
-		}
+var _ = Describe("number package", func() {
+	Describe("RandomInt64", func() {
+		It("should return a random int64", func() {
+			for i := 0; i < 10000; i++ {
+				Expect(number.RandomInt64(100)).To(BeNumerically("<", 100))
+			}
+		})
+	})
+
+	Describe("ParseInt", func() {
+		It("should parse a string into an int", func() {
+			Expect(number.ParseInt[int64]("123")).To(Equal(int64(123)))
+		})
+		It("should parse a string into an int32", func() {
+			Expect(number.ParseInt[int32]("123")).To(Equal(int32(123)))
+		})
+		It("should parse a string into an int64", func() {
+			Expect(number.ParseInt[int]("123")).To(Equal(123))
+		})
+		It("should parse a string into an uint", func() {
+			Expect(number.ParseInt[uint]("123")).To(Equal(uint(123)))
+		})
 	})
 })