feat(flows): native file dialog for flow file inputs

Wires the editor's new onPickFile host callback to file_picker
(withData: the editor receives name + bytes, never a raw path).
Pins chain_studio_flow_editor to v0.23.0. No more typing absolute
paths to feed a flow a file.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/pages/flows.dart

@@ -11,6 +11,7 @@
 // need to know what's inside the editor any more.
 
 import 'package:chain_studio_flow_editor/chain_studio_flow_editor.dart';
+import 'package:file_picker/file_picker.dart';
 import 'package:flutter/material.dart';
 
 import '../data/error_presentation.dart';
@@ -95,6 +96,17 @@ class _FlowsPageState extends State<FlowsPage> {
   /// Hub's install API and returns the refreshed capability
   /// list so the editor can re-analyze without waiting for the
   /// parent widget rebuild.
+  /// Native picker for a flow file input. `withData` loads the
+  /// bytes directly so the editor never touches the path itself
+  /// (sandbox-friendly: the picker grants access to exactly the
+  /// chosen file).
+  Future<PickedFileData?> _pickFlowInputFile() async {
+    final picked = await FilePicker.pickFiles(withData: true);
+    final f = picked?.files.single;
+    if (f == null || f.bytes == null) return null;
+    return PickedFileData(fileName: f.name, bytes: f.bytes!);
+  }
+
   Future<List<String>?> _onInstallCapability(String capability) async {
     // The analyzer hands us the full `use:` value (e.g. `debug.echo@^0`).
     // The hub resolves install sources by bare capability name; the
@@ -167,6 +179,9 @@ class _FlowsPageState extends State<FlowsPage> {
             onInstallCapability: _onInstallCapability,
             onAddModuleSource: _onAddModuleSource,
             activeProject: Workspace.instance.activeSlug,
+            // Native file dialog for the Run tab's file inputs —
+            // nobody should have to type an absolute path by hand.
+            onPickFile: _pickFlowInputFile,
             // The file wins for the run; accepting the switch only
             // aligns the workspace view to the file's project.
             onSwitchToFileProject: (slug) =>

pubspec.lock

@@ -46,7 +46,7 @@ packages:
       path: "../fai_chain_studio_flow_editor"
       relative: true
     source: path
-    version: "0.22.0"
+    version: "0.23.0"
   characters:
     dependency: transitive
     description:

pubspec.yaml

@@ -45,7 +45,7 @@ dependencies:
       # Tag-pinned so a CI (override-free) build is reproducible and an
       # editor push can't retroactively change what a Studio release
       # builds against. Bump this in lockstep with the editor tag.
-      ref: v0.22.0
+      ref: v0.23.0
 
 dev_dependencies:
   flutter_test: