fix: disable sandbox for ~/.claude access, add path input field for hidden folders

- Remove App Sandbox from Release entitlements (developer tool needs
  filesystem access to ~/.claude/projects — same as VS Code, iTerm2)
- Explicitly set get-task-allow=false in entitlements for notarization
- Add path input field in header so users can type paths with hidden
  folders (e.g. ~/.claude/projects) — press Enter or click arrow to scan
- Field pre-populated with ~/.claude/projects on launch
- Signed, notarized, stapled DMG

lib/screens/home/home_screen.dart

@@ -101,13 +101,24 @@ class _HomeScreenState extends State<HomeScreen> {
   String _searchQuery = '';
   _Project? _selectedProject;
   _Project? _customFolderProject;
+  final _pathController = TextEditingController();
+  final _pathFocusNode = FocusNode();
 
   @override
   void initState() {
     super.initState();
+    final home = _getRealHome() ?? '';
+    _pathController.text = '$home/.claude/projects';
     _scanProjects();
   }
 
+  @override
+  void dispose() {
+    _pathController.dispose();
+    _pathFocusNode.dispose();
+    super.dispose();
+  }
+
   /// Returns the real user home directory, even inside App Sandbox.
   /// In sandbox, HOME points to ~/Library/Containers/<bundleid>/Data.
   String? _getRealHome() {
@@ -291,6 +302,35 @@ class _HomeScreenState extends State<HomeScreen> {
     }
   }
 
+  /// Resolve a path string, expanding ~ to the home directory.
+  String _resolvePath(String input) {
+    final home = _getRealHome() ?? Platform.environment['HOME'] ?? '';
+    var path = input.trim();
+    if (path.startsWith('~/')) {
+      path = '$home${path.substring(1)}';
+    } else if (path == '~') {
+      path = home;
+    }
+    return path;
+  }
+
+  Future<void> _scanFromPathInput() async {
+    final resolved = _resolvePath(_pathController.text);
+    final dir = Directory(resolved);
+    if (await dir.exists()) {
+      await _scanFolder(resolved);
+    } else {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(
+            content: Text('Folder not found: $resolved'),
+            backgroundColor: AppColors.error,
+          ),
+        );
+      }
+    }
+  }
+
   Future<void> _pickFolder() async {
     final result = await FilePicker.platform.getDirectoryPath(
       dialogTitle: 'Select a folder containing Claude session files',
@@ -498,7 +538,54 @@ class _HomeScreenState extends State<HomeScreen> {
               : '${_projects.length} projects',
           style: const TextStyle(fontSize: 12, color: AppColors.textMuted),
         ),
-        const SizedBox(width: 12),
+        // Path input field
+        SizedBox(
+          width: 320,
+          child: TextField(
+            controller: _pathController,
+            focusNode: _pathFocusNode,
+            style: const TextStyle(
+              fontSize: 12,
+              color: AppColors.textPrimary,
+              fontFamily: 'JetBrains Mono',
+            ),
+            decoration: InputDecoration(
+              hintText: '~/ .claude/projects',
+              hintStyle: const TextStyle(
+                fontSize: 12,
+                color: AppColors.textMuted,
+                fontFamily: 'JetBrains Mono',
+              ),
+              isDense: true,
+              contentPadding: const EdgeInsets.symmetric(
+                horizontal: 10,
+                vertical: 8,
+              ),
+              filled: true,
+              fillColor: AppColors.surface,
+              border: OutlineInputBorder(
+                borderRadius: BorderRadius.circular(6),
+                borderSide: const BorderSide(color: AppColors.surfaceBorder),
+              ),
+              enabledBorder: OutlineInputBorder(
+                borderRadius: BorderRadius.circular(6),
+                borderSide: const BorderSide(color: AppColors.surfaceBorder),
+              ),
+              focusedBorder: OutlineInputBorder(
+                borderRadius: BorderRadius.circular(6),
+                borderSide: const BorderSide(color: AppColors.assistant),
+              ),
+              suffixIcon: IconButton(
+                icon: const Icon(Icons.arrow_forward, size: 14,
+                    color: AppColors.textMuted),
+                tooltip: 'Scan this folder',
+                onPressed: _scanFromPathInput,
+              ),
+            ),
+            onSubmitted: (_) => _scanFromPathInput(),
+          ),
+        ),
+        const SizedBox(width: 8),
         ElevatedButton.icon(
           onPressed: _loadSingleFile,
           icon: const Icon(Icons.insert_drive_file_outlined, size: 14),