desktop: add experimental flat layout toggle

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/App.kt

@@ -427,9 +427,19 @@ fun EndPartOfScreen() {
   ModalManager.end.showInView()
 }
 
+val LocalFlatLayout = staticCompositionLocalOf { false }
+
 // Spec: spec/client/navigation.md#DesktopScreen
 @Composable
 fun DesktopScreen(userPickerState: MutableStateFlow<AnimatedViewState>) {
+  val flatLayout = remember { appPrefs.developerTools.state }.value && remember { appPrefs.desktopFlatLayout.state }.value
+  CompositionLocalProvider(LocalFlatLayout provides flatLayout) {
+    DesktopScreenLayout(userPickerState)
+  }
+}
+
+@Composable
+private fun DesktopScreenLayout(userPickerState: MutableStateFlow<AnimatedViewState>) {
   Box(Modifier.width(DEFAULT_START_MODAL_WIDTH * fontSizeSqrtMultiplier)) {
     StartPartOfScreen(userPickerState)
     tryOrShowError("UserPicker", error = {}) {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/SimpleXAPI.kt

@@ -151,6 +151,7 @@ class AppPreferences {
   val logLevel = mkEnumPreference(SHARED_PREFS_LOG_LEVEL, LogLevel.WARNING) { LogLevel.entries.firstOrNull { it.name == this } }
   val showInternalErrors = mkBoolPreference(SHARED_PREFS_SHOW_INTERNAL_ERRORS, false)
   val showSlowApiCalls = mkBoolPreference(SHARED_PREFS_SHOW_SLOW_API_CALLS, false)
+  val desktopFlatLayout = mkBoolPreference(SHARED_PREFS_DESKTOP_FLAT_LAYOUT, false)
   val terminalAlwaysVisible = mkBoolPreference(SHARED_PREFS_TERMINAL_ALWAYS_VISIBLE, false)
   val networkUseSocksProxy = mkBoolPreference(SHARED_PREFS_NETWORK_USE_SOCKS_PROXY, false)
   val networkShowSubscriptionPercentage = mkBoolPreference(SHARED_PREFS_NETWORK_SHOW_SUBSCRIPTION_PERCENTAGE, false)
@@ -446,6 +447,7 @@ class AppPreferences {
     private const val SHARED_PREFS_LOG_LEVEL = "LogLevel"
     private const val SHARED_PREFS_SHOW_INTERNAL_ERRORS = "ShowInternalErrors"
     private const val SHARED_PREFS_SHOW_SLOW_API_CALLS = "ShowSlowApiCalls"
+    private const val SHARED_PREFS_DESKTOP_FLAT_LAYOUT = "DesktopFlatLayout"
     private const val SHARED_PREFS_TERMINAL_ALWAYS_VISIBLE = "TerminalAlwaysVisible"
     private const val SHARED_PREFS_NETWORK_USE_SOCKS_PROXY = "NetworkUseSocksProxy"
     private const val SHARED_PREFS_NETWORK_SHOW_SUBSCRIPTION_PERCENTAGE = "ShowSubscriptionPercentage"

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/usersettings/DeveloperView.kt

@@ -57,6 +57,7 @@ fun DeveloperView(withAuth: (title: String, desc: String, block: () -> Unit) ->
               m.controller.appPrefs.terminalAlwaysVisible.set(false)
             }
           }
+          SettingsPreferenceItem(painterResource(MR.images.ic_forum), stringResource(MR.strings.desktop_flat_layout), appPreferences.desktopFlatLayout)
         }
         SettingsPreferenceItem(painterResource(MR.images.ic_report), stringResource(MR.strings.show_internal_errors), appPreferences.showInternalErrors)
         SettingsPreferenceItem(painterResource(MR.images.ic_avg_pace), stringResource(MR.strings.show_slow_api_calls), appPreferences.showSlowApiCalls)

apps/multiplatform/common/src/commonMain/moko-resources/base/strings.xml

@@ -1163,6 +1163,7 @@
   <string name="deprecated_options_section">Deprecated options</string>
   <string name="show_internal_errors">Show internal errors</string>
   <string name="show_slow_api_calls">Show slow API calls</string>
+  <string name="desktop_flat_layout">Flat layout (experimental)</string>
   <string name="storage">Storage</string>
   <string name="storage_total">Total</string>
   <string name="shutdown_alert_question">Shutdown?</string>