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/data/local/AuthManager.kt

@@ -450,18 +450,6 @@ object AuthManager {
 
     fun getPort(): Int = serverStore.getLatestState().resolvedPort
 
-    fun setHost(host: String) {
-        val endpoint = endpoint()
-        val normalizedHost = host.trim().removePrefix("[").removeSuffix("]")
-        setBaseUrl(endpoint.baseUrl.newBuilder().host(normalizedHost).build().toString())
-    }
-
-    fun setPort(port: Int) {
-        require(port in 1..65535) { "Port is out of range" }
-        val endpoint = endpoint()
-        setBaseUrl(endpoint.baseUrl.newBuilder().port(port).build().toString())
-    }
-
     // ── Auto-reconnect ───────────────────────────────────────────────────
 
     fun isAutoReconnect(): Boolean = serverStore.getLatestState().autoReconnect