fix: resolve all build compilation and style check warnings (#597)

* fix: resolve all build compilation and style check warnings

* fix: remove unused import in SystemViewModel

app/src/test/java/com/m57/hermescontrol/data/local/AuthManagerTest.kt

@@ -52,7 +52,7 @@ class AuthManagerTest {
         every { android.util.Log.i(any(), any()) } returns 0
 
         // Mock filesDir to point to temporary directory for DataStore
-        val tempDir = java.io.File(System.getProperty("java.io.tmpdir"))
+        val tempDir = java.io.File(System.getProperty("java.io.tmpdir") ?: "/tmp")
         testContext = TestContext(tempDir, mockContext)
 
         val tempFile = java.io.File(tempDir, "server_store.json")
@@ -101,7 +101,7 @@ class AuthManagerTest {
 
     @After
     fun tearDown() {
-        val tempDir = java.io.File(System.getProperty("java.io.tmpdir"))
+        val tempDir = java.io.File(System.getProperty("java.io.tmpdir") ?: "/tmp")
         val tempFile = java.io.File(tempDir, "server_store.json")
         if (tempFile.exists()) {
             tempFile.delete()

app/src/test/java/com/m57/hermescontrol/data/remote/HermesApiServiceTest.kt

@@ -430,7 +430,14 @@ class HermesApiServiceTest {
             assertEquals(100L, body?.daily?.first()?.input_tokens)
             assertEquals(0.03, body?.totals?.total_estimated_cost)
             assertEquals(2, body?.skills?.summary?.distinct_skills_used)
-            assertEquals("x", body?.skills?.top_skills?.first()?.skill)
+            assertEquals(
+                "x",
+                body
+                    ?.skills
+                    ?.top_skills
+                    ?.first()
+                    ?.skill,
+            )
             assertEquals(1, body?.tools?.size)
             assertEquals("terminal", body?.tools?.first()?.tool)
             assertEquals(21820, body?.tools?.first()?.count)