refactor(lab): consolidate LabsScreen and move route to Menu (#785)

* refactor(theme): consolidate design system, remove legacy theme

* fix(navigation): use qualifiedName strings for FlowHost saved state

KClass references aren't serializable and can't survive
rememberSaveable across process death. Use qualifiedName strings
instead so the seeded-stack comparison works after restoration.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor(ui): relocate SearchBar to shared SearchInput component

Move the currency-selection-local SearchBar into a shared, reusable
SearchInput in ui/components. The placeholder is now a parameter,
the shape is CircleShape, and the icon tint follows the theme.

* refactor(lab): consolidate LabsScreen and move route to Menu

Merge LabsScreen and StandaloneLabsScreen into a single composable
that detects navigation context at runtime. Remove Sheets.Lab route
(Menu.Lab already exists). Remove unused PreloadLabs composable.

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: bmc08gt

apps/flipcash/app/src/main/kotlin/com/flipcash/app/internal/ui/navigation/AppScreenContent.kt

@@ -33,7 +33,6 @@ import com.flipcash.app.discovery.TokenDiscoveryScreen
 import com.flipcash.app.internal.ui.navigation.decorators.rememberNavMessagingEntryDecorator
 import com.flipcash.app.lab.LabsScreen
 import com.flipcash.app.lab.NavBarSettingsScreen
-import com.flipcash.app.lab.StandaloneLabsScreen
 import com.flipcash.app.login.OnboardingFlowScreen
 import com.flipcash.app.menu.MenuScreen
 import com.flipcash.app.myaccount.MyAccountScreen
@@ -88,7 +87,6 @@ fun appEntryProvider(
     annotatedEntry<AppRoute.Sheets.Wallet> { BalanceScreen() }
     annotatedEntry<AppRoute.Sheets.ShareApp> { ShareAppScreen() }
     annotatedEntry<AppRoute.Sheets.Menu> { MenuScreen() }
-    annotatedEntry<AppRoute.Sheets.Lab> { StandaloneLabsScreen() }
 
 
     // Tokens

apps/flipcash/core/src/main/kotlin/com/flipcash/app/core/AppRoute.kt

@@ -145,8 +145,6 @@ sealed interface AppRoute : NavKey, Parcelable {
         data object Wallet : Sheets
         @Serializable
         data object Menu : Sheets
-        @Serializable
-        data object Lab : Sheets
 
         @Serializable
         data object ShareApp : Sheets

apps/flipcash/features/lab/src/main/kotlin/com/flipcash/app/lab/LabsScreen.kt

@@ -3,6 +3,7 @@ package com.flipcash.app.lab
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
@@ -17,49 +18,32 @@ import com.getcode.ui.components.AppBarWithTitle
 @Composable
 fun LabsScreen() {
     val navigator = LocalCodeNavigator.current
-
-    Column(
-        modifier = Modifier.fillMaxSize(),
-        horizontalAlignment = Alignment.CenterHorizontally,
-    ) {
-        AppBarWithTitle(
-            title = stringResource(R.string.title_betaFlags),
-            titleAlignment = Alignment.CenterHorizontally,
-            backButton = true,
-            isInModal = true,
-            onBackIconClicked = navigator::pop
-        )
-
-        val viewModel = getActivityScopedViewModel<LabsScreenViewModel>()
-
-        LabsScreenContent(viewModel)
-    }
-}
-
-@Composable
-fun StandaloneLabsScreen() {
-    val navigator = LocalCodeNavigator.current
-
+    val isSheetRoot = remember { navigator.backStack.size <= 1 }
     Column(
         modifier = Modifier.fillMaxSize(),
         horizontalAlignment = Alignment.CenterHorizontally,
     ) {
-        AppBarWithTitle(
-            title = stringResource(R.string.title_betaFlags),
-            titleAlignment = Alignment.CenterHorizontally,
-            isInModal = true,
-            endContent = {
-                AppBarDefaults.Close { navigator.hide() }
-            }
-        )
+        if (isSheetRoot) {
+            AppBarWithTitle(
+                title = stringResource(R.string.title_betaFlags),
+                titleAlignment = Alignment.CenterHorizontally,
+                isInModal = true,
+                endContent = {
+                    AppBarDefaults.Close { navigator.hide() }
+                }
+            )
+        } else {
+            AppBarWithTitle(
+                title = stringResource(R.string.title_betaFlags),
+                titleAlignment = Alignment.CenterHorizontally,
+                backButton = true,
+                isInModal = true,
+                onBackIconClicked = navigator::pop
+            )
+        }
 
         val viewModel = getActivityScopedViewModel<LabsScreenViewModel>()
 
         LabsScreenContent(viewModel)
     }
 }
-
-@Composable
-fun PreloadLabs() {
-    val viewModel = getActivityScopedViewModel<LabsScreenViewModel>()
-}

apps/flipcash/features/login/src/main/kotlin/com/flipcash/app/login/OnboardingFlowScreen.kt

@@ -353,7 +353,7 @@ private fun LoginStepContent(seed: String?) {
             login = { flowNavigator.navigateTo(OnboardingStep.SeedInput) },
             isLabsOpen = state.betaOptionsVisible,
             onLogoTapped = { vm.dispatchEvent(LoginViewModel.Event.OnLogoTapped) },
-            openBetaFlags = { outerNavigator.openAsSheet(AppRoute.Sheets.Lab) },
+            openBetaFlags = { outerNavigator.openAsSheet(AppRoute.Menu.Lab) },
         )
     }
 }