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/main/java/com/m57/hermescontrol/ui/achievements/AchievementsViewModel.kt

@@ -86,24 +86,6 @@ class AchievementsViewModel : ViewModel(), ToastHost {
         )
     }
 
-    fun loadScanStatus() {
-        safeLaunchLoad(
-            apiCall = { safeApiCall { api.getAchievementScanStatus() } },
-            onStart = { /* silent background refresh */ },
-            onSuccess = { status ->
-                _uiState.update {
-                    it.copy(
-                        scanState = status.state,
-                        scanLastError = status.lastError,
-                        scanLastDurationMs = status.lastDurationMs,
-                        scanRunCount = status.runCount,
-                    )
-                }
-            },
-            onError = { /* silent — scan runs independently */ },
-        )
-    }
-
     fun loadRecentUnlocks() {
         safeLaunchLoad(
             apiCall = { safeApiCall { api.getRecentUnlocks() } },