refactor: remove verified dead code across data, UI, and resources (#680)

* refactor: remove unused dead code across data, UI, and resources

* fix: resolve dangling references left by dead-code removal

Restore empty object Motion (braces required) and remove the 12 stale
test usages that still called the now-deleted production symbols:
- ServerStoreTest: removeServer/switchToServer tests
- ServerEndpointTest: isCleartext assertions
- ConnectViewModelTest: onHostChange/onPortChange tests + 3 dropped R.string refs
- SettingsViewModelTest: renameProfile tests + clearNavigateToLogin
- E2eIntegrationTest: previewSkill tests + onHostChange/onPortChange calls

Verified locally: compileDebugUnitTestKotlin + 48 tests pass.

* fix: remove unused imports flagged by ktlint

Drops 4 no-longer-referenced imports left by the dead-code removal:
- HermesApiService: SkillScanResponse (scanHubSkill removed)
- ServerEndpointTest: assertFalse, assertTrue (isCleartext assertions dropped)
- SettingsViewModelTest: assertFalse (rename tests removed)

---------

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/test/java/com/m57/hermescontrol/ui/connect/ConnectViewModelTest.kt

@@ -79,13 +79,6 @@ class ConnectViewModelTest {
         every { mockApp.getString(R.string.connect_error_refused) } returns "Connection refused – is Hermes running?"
         every { mockApp.getString(R.string.connect_error_timeout) } returns "Connection timed out"
         every { mockApp.getString(R.string.connect_error_connection_failed) } returns "Connection failed: %1\$s"
-        every {
-            mockApp.getString(R.string.connect_error_malformed)
-        } returns "Malformed pairing string — expected URL or Base64-encoded JSON"
-        every {
-            mockApp.getString(R.string.connect_error_missing_fields)
-        } returns "Malformed pairing string — missing host, port, or token"
-        every { mockApp.getString(R.string.connect_error_parse_failed) } returns "Failed to parse pairing string: %1\$s"
     }
 
     @After
@@ -117,22 +110,6 @@ class ConnectViewModelTest {
         assertNull(viewModel.uiState.value.errorMessage)
     }
 
-    @Test
-    fun testOnHostChange() {
-        val viewModel = ConnectViewModel(mockApp)
-        viewModel.onHostChange("  192.168.1.50  ")
-        assertEquals("https://192.168.1.50:9119/", viewModel.uiState.value.baseUrl)
-        assertNull(viewModel.uiState.value.errorMessage)
-    }
-
-    @Test
-    fun testOnPortChange() {
-        val viewModel = ConnectViewModel(mockApp)
-        viewModel.onPortChange("90abc90")
-        assertEquals("https://127.0.0.1:9090/", viewModel.uiState.value.baseUrl)
-        assertNull(viewModel.uiState.value.errorMessage)
-    }
-
     @Test
     fun testConnect_blankToken_showsError() {
         val viewModel = ConnectViewModel(mockApp)