fix: recognize stable APK releases as newer than release candidates (#1184)

app/src/test/java/com/m57/hermescontrol/ui/settings/AppUpdateViewModelTest.kt

@@ -166,6 +166,21 @@ class AppUpdateViewModelTest {
 
     // ── Manual check ────────────────────────────────────────────────────
 
+    @Test
+    fun checkForUpdate_stableReleasePromptsInstalledRc() =
+        runTest {
+            coEvery { checker.fetchLatestRelease() } returns updateInfo(tag = "v1.25")
+            val vm = AppUpdateViewModel(app, checker, "1.25.rc.1", testDispatcher)
+            advanceUntilIdle()
+
+            vm.checkForUpdate()
+            advanceUntilIdle()
+
+            assertTrue(vm.state.value is AppUpdateState.UpdateAvailable)
+            assertEquals("v1.25", (vm.state.value as AppUpdateState.UpdateAvailable).latestTag)
+            assertEquals(vm.state.value, AppUpdateCache.state.value)
+        }
+
     @Test
     fun checkForUpdate_upToDateWhenSameVersion() =
         runTest {