fix(ft8): register FT8 in settings page-order list (UI settings)

User spot-check found FT8 missing from the settings screens list
(SettingsScreen.kt:703) - page order drag/hide UI could not show or
reorder it. Added "nav_ft8 to FT8" after AMSAT (name must match
Screen.screenId). Verified: :feature:settings + :app compileDebugKotlin
BUILD SUCCESSFUL.

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsScreen.kt

@@ -709,6 +709,7 @@ private fun UiSettingsCard(
         R.string.nav_cw to "CwDecode",
         R.string.nav_log to "WavelogLog",
         R.string.nav_amsat to "AMSAT",
+        R.string.nav_ft8 to "FT8",
         R.string.nav_map to "Map",
         R.string.nav_prefs to "Settings"
     ) // name 必须与 Screen.screenId 一致 (R8 安全)