Add Show All mode with optional folder structure preservation

- BrowseScreen: Show All toggle chip in toolbar bypasses ExifFilter
  and shows every file from every DCIM subfolder
- ImportScreen: Preserve folder structure toggle (auto-enabled in Show
  All mode) — copies files into Camera/, Screenshots/ etc subfolders
  under the staging destination instead of flat
- AppState: _showAll StateFlow, toggleShowAll(), loadPhotos and
  setDateFilter respect the flag
- Copier: extracts DCIM subfolder from devicePath and creates matching
  subdirectory in staging when preserveFolderStructure=true

src/main/kotlin/com/bolenpad/photophetch/model/ImportJob.kt

@@ -19,6 +19,13 @@ data class ImportJob(
     val stripLivePhotoMotion: Boolean = true,
     /** Whether to delete photos from the phone after successful verification */
     val deleteAfterVerify: Boolean = false,
+    /**
+     * Whether to preserve the device's subfolder structure under the staging folder.
+     * e.g. _staging/2026-07-28_Samsung/Camera/IMG_001.jpg
+     *      _staging/2026-07-28_Samsung/Screenshots/  (excluded by filter normally)
+     * Used when importing in "show all" mode.
+     */
+    val preserveFolderStructure: Boolean = false,
 )
 
 /**

src/main/kotlin/com/bolenpad/photophetch/transfer/Copier.kt

@@ -63,7 +63,19 @@ class Copier(
 
         photosToImport.forEachIndexed { idx, photo ->
             onProgress(idx, photosToImport.size, photo.filename)
-            val result = copyOne(photo, stagingDir, job.convertHeicToJpeg)
+            // Determine destination directory — flat or preserve subfolder
+            val destDir = if (job.preserveFolderStructure) {
+                // devicePath is like /sdcard/DCIM/Camera/IMG_001.jpg
+                // Extract the subfolder name relative to DCIM root
+                val subFolder = photo.devicePath
+                    .substringAfter("/DCIM/", "")
+                    .substringBeforeLast("/", "")
+                    .ifBlank { "Camera" }
+                stagingDir.resolve(subFolder).also { it.toFile().mkdirs() }
+            } else {
+                stagingDir
+            }
+            val result = copyOne(photo, destDir, job.convertHeicToJpeg)
             results.add(result)
             if (result.error != null) {
                 log.error("Failed to copy ${photo.filename}: ${result.error}")

src/main/kotlin/com/bolenpad/photophetch/ui/AppState.kt

@@ -68,7 +68,6 @@ data class ImportProgress(
 
 /**
  * Application state container — the single source of truth for all UI state.
- * All mutations happen via public methods; UI observes via StateFlows.
  */
 class AppState(
     private val configStore: ConfigStore,
@@ -108,11 +107,7 @@ class AppState(
                     val ios = IosConnector(_config.value.gphoto2Path ?: "gphoto2")
                     android.detectDevices() + ios.detectDevices()
                 }
-                _deviceScan.value = if (devices.isEmpty()) {
-                    DeviceScanState.Found(emptyList())
-                } else {
-                    DeviceScanState.Found(devices)
-                }
+                _deviceScan.value = DeviceScanState.Found(devices)
             } catch (e: Exception) {
                 log.error("Device scan failed", e)
                 _deviceScan.value = DeviceScanState.Error(e.message ?: "Unknown error")
@@ -138,13 +133,25 @@ class AppState(
     private val _dateFilter = MutableStateFlow<Pair<LocalDate?, LocalDate?>>(null to null)
     val dateFilter: StateFlow<Pair<LocalDate?, LocalDate?>> = _dateFilter.asStateFlow()
 
+    /** When true, bypass ExifFilter and show all photos from all DCIM folders */
+    private val _showAll = MutableStateFlow(false)
+    val showAll: StateFlow<Boolean> = _showAll.asStateFlow()
+
     fun loadPhotos(device: DeviceInfo) {
         scope.launch {
             _photoList.value = PhotoListState.Loading
             try {
                 val connector = connectorFor(device)
                 val raw = withContext(Dispatchers.IO) { connector.listPhotos(device) }
-                val filtered = ExifFilter.filter(raw, _config.value.defaultStripLivePhotoMotion)
+                val (from, to) = _dateFilter.value
+                val filtered = if (_showAll.value) {
+                    applyDateFilter(raw, from, to)
+                } else {
+                    applyDateFilter(
+                        ExifFilter.filter(raw, _config.value.defaultStripLivePhotoMotion),
+                        from, to,
+                    )
+                }
                 val shootingInHeic = ExifFilter.isShootingInHeic(filtered)
                 _photoList.value = PhotoListState.Loaded(
                     all = raw,
@@ -158,13 +165,27 @@ class AppState(
         }
     }
 
+    fun toggleShowAll() {
+        _showAll.value = !_showAll.value
+        val current = _photoList.value as? PhotoListState.Loaded ?: return
+        val (from, to) = _dateFilter.value
+        val filtered = if (_showAll.value) {
+            applyDateFilter(current.all, from, to)
+        } else {
+            applyDateFilter(
+                ExifFilter.filter(current.all, _config.value.defaultStripLivePhotoMotion),
+                from, to,
+            )
+        }
+        _photoList.value = current.copy(filtered = filtered)
+    }
+
     fun setDateFilter(from: LocalDate?, to: LocalDate?) {
         _dateFilter.value = from to to
-        // Re-apply filter over already-loaded photos
         val current = _photoList.value as? PhotoListState.Loaded ?: return
-        val filtered = ExifFilter.filter(current.all, _config.value.defaultStripLivePhotoMotion)
-            .let { applyDateFilter(it, from, to) }
-        _photoList.value = current.copy(filtered = filtered)
+        val base = if (_showAll.value) current.all
+            else ExifFilter.filter(current.all, _config.value.defaultStripLivePhotoMotion)
+        _photoList.value = current.copy(filtered = applyDateFilter(base, from, to))
     }
 
     fun togglePhotoSelection(photo: PhonePhoto) {
@@ -202,6 +223,7 @@ class AppState(
             convertHeicToJpeg = true,
             stripLivePhotoMotion = true,
             deleteAfterVerify = false,
+            preserveFolderStructure = false,
             folderName = "",
         )
     )
@@ -211,6 +233,7 @@ class AppState(
         val convertHeicToJpeg: Boolean,
         val stripLivePhotoMotion: Boolean,
         val deleteAfterVerify: Boolean,
+        val preserveFolderStructure: Boolean,
         val folderName: String,
     )
 
@@ -226,14 +249,18 @@ class AppState(
             .replace("{date}", today.toString())
             .replace("{device}", StagingPath.deviceLabel(device))
 
-        // Auto-increment if the folder already exists: 2026-07-28_iPhone15Pro_2, _3, …
+        // Auto-increment if the folder already exists
         val folderName = if (cfg.stagingRoot.isNotBlank()) {
             StagingPath.uniqueFolderName(Paths.get(cfg.stagingRoot), baseName)
         } else {
             baseName
         }
 
-        _importConfig.update { it.copy(folderName = folderName) }
+        _importConfig.update { it.copy(
+            folderName = folderName,
+            // When showing all files, default to preserving folder structure
+            preserveFolderStructure = _showAll.value,
+        ) }
         navigateTo(Screen.IMPORT_CONFIG)
     }
 
@@ -260,6 +287,7 @@ class AppState(
             convertHeicToJpeg = importCfg.convertHeicToJpeg,
             stripLivePhotoMotion = importCfg.stripLivePhotoMotion,
             deleteAfterVerify = importCfg.deleteAfterVerify,
+            preserveFolderStructure = importCfg.preserveFolderStructure,
         )
 
         navigateTo(Screen.IMPORTING)

src/main/kotlin/com/bolenpad/photophetch/ui/BrowseScreen.kt

@@ -34,15 +34,18 @@ fun BrowseScreen(state: AppState) {
     val device by state.selectedDevice.collectAsState()
     val config by state.config.collectAsState()
     val dateFilter by state.dateFilter.collectAsState()
+    val showAll by state.showAll.collectAsState()
 
     Column(modifier = Modifier.fillMaxSize()) {
         // Top bar
         BrowseTopBar(
             device = device,
             selected = selected,
+            showAll = showAll,
             onBack = { state.navigateTo(Screen.CONNECT) },
             onSelectAll = { state.selectAll() },
             onSelectNone = { state.selectNone() },
+            onToggleShowAll = { state.toggleShowAll() },
             onImport = { state.prepareImport() },
         )
 
@@ -124,9 +127,11 @@ fun BrowseScreen(state: AppState) {
 private fun BrowseTopBar(
     device: DeviceInfo?,
     selected: Set<PhonePhoto>,
+    showAll: Boolean,
     onBack: () -> Unit,
     onSelectAll: () -> Unit,
     onSelectNone: () -> Unit,
+    onToggleShowAll: () -> Unit,
     onImport: () -> Unit,
 ) {
     TopAppBar(
@@ -139,6 +144,12 @@ private fun BrowseTopBar(
         actions = {
             TextButton(onClick = onSelectAll) { Text("All") }
             TextButton(onClick = onSelectNone) { Text("None") }
+            FilterChip(
+                selected = showAll,
+                onClick = onToggleShowAll,
+                label = { Text("Show all") },
+                modifier = Modifier.padding(horizontal = 4.dp),
+            )
             Button(
                 onClick = onImport,
                 enabled = selected.isNotEmpty(),

src/main/kotlin/com/bolenpad/photophetch/ui/ImportScreen.kt

@@ -121,6 +121,25 @@ fun ImportScreen(state: AppState) {
         // Delete after verify
         Text("After Import", style = MaterialTheme.typography.titleSmall, fontWeight = FontWeight.SemiBold)
 
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            verticalAlignment = Alignment.CenterVertically,
+            horizontalArrangement = Arrangement.SpaceBetween,
+        ) {
+            Column(modifier = Modifier.weight(1f)) {
+                Text("Preserve folder structure")
+                Text(
+                    "Copy files into subfolders matching their device path (e.g. Camera/, Screenshots/). Enabled automatically in Show All mode.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+            Switch(
+                checked = importConfig.preserveFolderStructure,
+                onCheckedChange = { state.updateImportConfig { copy(preserveFolderStructure = it) } },
+            )
+        }
+
         Row(
             modifier = Modifier.fillMaxWidth(),
             verticalAlignment = Alignment.CenterVertically,