feat(main): 로그인 가드 헬퍼를 추가한다

app/src/test/java/kr/co/vividnext/sodalive/v2/main/MainV2LoginGuardSourceTest.kt

@@ -0,0 +1,38 @@
+package kr.co.vividnext.sodalive.v2.main
+
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+import java.io.File
+
+class MainV2LoginGuardSourceTest {
+
+    @Test
+    fun `MainV2 로그인 가드는 v2 Activity 로그인 진입점과 성인 콘텐츠 설정을 사용한다`() {
+        val source = projectFile("app/src/main/java/kr/co/vividnext/sodalive/v2/main/MainV2LoginGuard.kt").readText()
+
+        assertTrue(source.contains("fun Fragment.ensureMainV2NavigationAllowed("))
+        assertTrue(source.contains("requiresAdultContentAccess: Boolean = false"))
+        assertTrue(source.contains("SharedPreferenceManager.token.isBlank()"))
+        assertTrue(source.contains("(activity as? MainV2Activity)?.showLoginActivity()"))
+        assertTrue(source.contains("SharedPreferenceManager.countryCode.ifBlank { \"KR\" }"))
+        assertTrue(source.contains("SharedPreferenceManager.isAuth"))
+        assertTrue(source.contains("SodaDialog("))
+        assertTrue(source.contains("Auth.auth(requireActivity(), requireContext())"))
+        assertTrue(source.contains("Gson().fromJson(json, BootpayResponse::class.java)"))
+        assertTrue(source.contains("AuthVerifyRequest(receiptId = bootpayResponse.data.receiptId)"))
+        assertTrue(source.contains("myPageViewModel.authVerify(request)"))
+        assertTrue(source.contains("SplashActivity::class.java"))
+        assertTrue(source.contains("SharedPreferenceManager.isAdultContentVisible"))
+        assertTrue(source.contains("ContentSettingsActivity::class.java"))
+        assertTrue(source.contains("putExtra(Constants.EXTRA_SHOW_SENSITIVE_CONTENT_GUIDE, true)"))
+        assertFalse(source.contains("Auth.auth(requireActivity(), requireContext()) {}"))
+        assertFalse(source.contains("kr.co.vividnext.sodalive.main.MainActivity"))
+    }
+
+    private fun projectFile(relativePath: String): File {
+        val candidates = listOf(File(relativePath), File("../$relativePath"))
+        return candidates.firstOrNull { it.exists() }
+            ?: error("Project file not found: $relativePath")
+    }
+}