feat: Migrate project to Kotlin Multiplatform (KMP) architecture (#4738)

Signed-off-by: James Rich <2199651+jamesarich@users.noreply.github.com>

core/ui/src/main/kotlin/org/meshtastic/core/ui/component/ImportFab.kt

@@ -39,8 +39,6 @@ import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.core.net.toUri
 import org.jetbrains.compose.resources.stringResource
-import org.meshtastic.core.barcode.rememberBarcodeScanner
-import org.meshtastic.core.nfc.NfcScannerEffect
 import org.meshtastic.core.resources.Res
 import org.meshtastic.core.resources.cancel
 import org.meshtastic.core.resources.import_label
@@ -60,6 +58,8 @@ import org.meshtastic.core.resources.url
 import org.meshtastic.core.ui.icon.MeshtasticIcons
 import org.meshtastic.core.ui.icon.QrCode2
 import org.meshtastic.core.ui.theme.AppTheme
+import org.meshtastic.core.ui.util.LocalBarcodeScannerProvider
+import org.meshtastic.core.ui.util.LocalNfcScannerProvider
 import org.meshtastic.core.ui.util.openNfcSettings
 import org.meshtastic.proto.SharedContact
 
@@ -98,17 +98,18 @@ fun MeshtasticImportFAB(
     var showNfcDisabledDialog by remember { mutableStateOf(false) }
     val context = LocalContext.current
 
-    val barcodeScanner = rememberBarcodeScanner(onResult = { contents -> contents?.toUri()?.let { onImport(it) } })
+    val barcodeScanner = LocalBarcodeScannerProvider.current { contents -> contents?.toUri()?.let { onImport(it) } }
+    val nfcScanner = LocalNfcScannerProvider.current
 
     if (isNfcScanning) {
-        NfcScannerEffect(
-            onResult = { contents ->
+        nfcScanner(
+            { contents ->
                 contents?.toUri()?.let {
                     onImport(it)
                     isNfcScanning = false
                 }
             },
-            onNfcDisabled = {
+            {
                 isNfcScanning = false
                 showNfcDisabledDialog = true
             },

core/ui/src/main/kotlin/org/meshtastic/core/ui/util/BarcodeScanner.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2026 Meshtastic LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.meshtastic.core.ui.util
+
+interface BarcodeScanner {
+    fun startScan()
+}

core/ui/src/main/kotlin/org/meshtastic/core/ui/util/LocalAnalyticsIntroProvider.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2026 Meshtastic LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.meshtastic.core.ui.util
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.compositionLocalOf
+
+val LocalAnalyticsIntroProvider = compositionLocalOf<@Composable () -> Unit> { {} }

core/ui/src/main/kotlin/org/meshtastic/core/ui/util/LocalBarcodeScannerProvider.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2026 Meshtastic LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.meshtastic.core.ui.util
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.compositionLocalOf
+
+val LocalBarcodeScannerProvider =
+    compositionLocalOf<@Composable (onResult: (String?) -> Unit) -> BarcodeScanner> {
+        {
+            object : BarcodeScanner {
+                override fun startScan() {
+                    // Default NO-OP
+                }
+            }
+        }
+    }

core/ui/src/main/kotlin/org/meshtastic/core/ui/util/LocalNfcScannerProvider.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2026 Meshtastic LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.meshtastic.core.ui.util
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.compositionLocalOf
+
+val LocalNfcScannerProvider =
+    compositionLocalOf<@Composable (onResult: (String?) -> Unit, onNfcDisabled: () -> Unit) -> Unit> { { _, _ -> } }

core/ui/src/main/kotlin/org/meshtastic/core/ui/util/MapViewProvider.kt

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2026 Meshtastic LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.meshtastic.core.ui.util
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.compositionLocalOf
+import androidx.compose.ui.Modifier
+
+/**
+ * Interface for providing a flavored MapView. This allows the map feature to be decoupled from specific map
+ * implementations (Google Maps vs osmdroid).
+ */
+interface MapViewProvider {
+    @Composable
+    fun MapView(
+        modifier: Modifier,
+        // We use Any here to avoid circular dependency with feature:map
+        viewModel: Any,
+        navigateToNodeDetails: (Int) -> Unit,
+        focusedNodeNum: Int? = null,
+        // Using List<Any> to avoid dependency on proto.Position if needed
+        nodeTracks: List<Any>? = null,
+        tracerouteOverlay: Any? = null,
+        tracerouteNodePositions: Map<Int, Any> = emptyMap(),
+        onTracerouteMappableCountChanged: (Int, Int) -> Unit = { _, _ -> },
+    )
+}
+
+val LocalMapViewProvider = compositionLocalOf<MapViewProvider?> { null }