feat: Browse picks folder, Load picks single file, recursive .jsonl scan

- Browse button now opens a folder picker and recursively scans all
  subfolders for .jsonl files, displaying them in the session list
- New Load button for loading a single .jsonl file (old Browse behavior)
- Default path remains ~/.claude/projects on launch
- Signed, notarized, stapled DMG

lib/screens/home/home_screen.dart

@@ -100,6 +100,7 @@ class _HomeScreenState extends State<HomeScreen> {
   bool _scanning = true;
   String _searchQuery = '';
   _Project? _selectedProject;
+  _Project? _customFolderProject;
 
   @override
   void initState() {
@@ -290,7 +291,68 @@ class _HomeScreenState extends State<HomeScreen> {
     }
   }
 
-  Future<void> _pickFile() async {
+  Future<void> _pickFolder() async {
+    final result = await FilePicker.platform.getDirectoryPath(
+      dialogTitle: 'Select a folder containing Claude session files',
+    );
+    if (result != null) {
+      await _scanFolder(result);
+    }
+  }
+
+  Future<void> _scanFolder(String folderPath) async {
+    setState(() {
+      _scanning = true;
+      _selectedProject = null;
+    });
+
+    final sessions = <_SessionFile>[];
+
+    // Recursively scan for .jsonl files
+    final dir = Directory(folderPath);
+    if (await dir.exists()) {
+      await _scanFolderRecursive(dir, sessions);
+    }
+
+    sessions.sort((a, b) => b.stat.modified.compareTo(a.stat.modified));
+
+    if (mounted) {
+      setState(() {
+        _customFolderProject = _Project(
+          dirPath: folderPath,
+          rawDirName: folderPath.split('/').last,
+          displayName: folderPath.split('/').last,
+          fullPath: folderPath,
+          sessions: sessions,
+          lastModified: sessions.isNotEmpty ? sessions.first.stat.modified : DateTime.now(),
+        );
+        _selectedProject = _customFolderProject;
+        _scanning = false;
+      });
+    }
+  }
+
+  Future<void> _scanFolderRecursive(Directory dir, List<_SessionFile> sessions) async {
+    try {
+      await for (final entity in dir.list()) {
+        if (entity is File && entity.path.endsWith('.jsonl')) {
+          try {
+            final stat = entity.statSync();
+            final fileName = entity.path.split('/').last;
+            sessions.add(_SessionFile(
+              file: entity,
+              stat: stat,
+              sessionId: fileName.replaceAll('.jsonl', ''),
+            ));
+          } catch (_) {}
+        } else if (entity is Directory) {
+          await _scanFolderRecursive(entity, sessions);
+        }
+      }
+    } catch (_) {}
+  }
+
+  Future<void> _loadSingleFile() async {
     final home = _getRealHome() ?? '';
     final result = await FilePicker.platform.pickFiles(
       type: FileType.custom,
@@ -438,7 +500,23 @@ class _HomeScreenState extends State<HomeScreen> {
         ),
         const SizedBox(width: 12),
         ElevatedButton.icon(
-          onPressed: _pickFile,
+          onPressed: _loadSingleFile,
+          icon: const Icon(Icons.insert_drive_file_outlined, size: 14),
+          label: const Text('Load'),
+          style: ElevatedButton.styleFrom(
+            backgroundColor: AppColors.surfaceLight,
+            foregroundColor: AppColors.textPrimary,
+            padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 8),
+            shape: RoundedRectangleBorder(
+              borderRadius: BorderRadius.circular(6),
+              side: const BorderSide(color: AppColors.surfaceBorder),
+            ),
+            textStyle: const TextStyle(fontSize: 12),
+          ),
+        ),
+        const SizedBox(width: 8),
+        ElevatedButton.icon(
+          onPressed: _pickFolder,
           icon: const Icon(Icons.folder_open, size: 14),
           label: const Text('Browse'),
           style: ElevatedButton.styleFrom(