refactor: FaiError -> ChainError (SDK stub rename lockstep)

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

lib/data/error_presentation.dart

@@ -32,7 +32,7 @@ import 'chain_log.dart';
 /// back to a Material default duration of 6 seconds — twice
 /// the framework default so the operator has time to click
 /// copy on an unfamiliar message.
-void showFaiErrorSnack(
+void showChainErrorSnack(
   BuildContext context,
   String source,
   Object error, {
@@ -101,7 +101,7 @@ void showFaiProcessError(
   final detail = [stderr.trim(), stdout.trim()]
       .where((s) => s.isNotEmpty)
       .join('\n\n');
-  showFaiErrorSnack(
+  showChainErrorSnack(
     context,
     source,
     detail.isEmpty ? 'process exited non-zero (no output)' : detail,
@@ -122,7 +122,7 @@ Future<void> showFaiProcessErrorDialog(
   final detail = [stderr.trim(), stdout.trim()]
       .where((s) => s.isNotEmpty)
       .join('\n\n');
-  return showFaiErrorDialog(
+  return showChainErrorDialog(
     context,
     source,
     detail.isEmpty ? 'process exited non-zero (no output)' : detail,
@@ -133,7 +133,7 @@ Future<void> showFaiProcessErrorDialog(
 /// Show [error] as a centered modal dialog. Use this when the
 /// failure blocks meaningful interaction (auth missing, hub
 /// unreachable) — a SnackBar would be too easy to dismiss.
-Future<void> showFaiErrorDialog(
+Future<void> showChainErrorDialog(
   BuildContext context,
   String source,
   Object error, {

lib/pages/audit.dart

@@ -95,14 +95,14 @@ class _AuditPageState extends State<AuditPage> {
       _refresh();
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'audit.clear', e);
+      showChainErrorSnack(context, 'audit.clear', e);
     }
   }
 
   // _friendly was an inline shadow of friendlyError() in
   // data/friendly_error.dart — kept only because the original
   // call site predated the central mapper. Removed in favour
-  // of showFaiErrorSnack, which uses friendlyError under the
+  // of showChainErrorSnack, which uses friendlyError under the
   // hood (with proper gRPC-code mapping + selectable
   // copy-affordance).
 

lib/pages/doctor.dart

@@ -457,7 +457,7 @@ class _PathRow extends StatelessWidget {
               );
               if (!context.mounted) return;
               if (!r.ok) {
-                showFaiErrorSnack(
+                showChainErrorSnack(
                   context,
                   'doctor.open-path',
                   r.stderr.isEmpty ? 'open failed' : r.stderr,

lib/pages/federation.dart

@@ -49,7 +49,7 @@ class _FederationPageState extends State<FederationPage> {
       _refresh();
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'federation.issue', e,
+      showChainErrorSnack(context, 'federation.issue', e,
           title: l.federationIssueFailed(''));
     }
   }

lib/pages/flows.dart

@@ -132,7 +132,7 @@ class _FlowsPageState extends State<FlowsPage> {
         final l = AppLocalizations.of(context);
         // Copyable error (was a plain SnackBar) — install failures
         // carry the real cause (network, signature, store lookup).
-        showFaiErrorSnack(
+        showChainErrorSnack(
           context,
           'flows.install',
           e,

lib/pages/store.dart

@@ -756,7 +756,7 @@ class _StorePageState extends State<StorePage> {
       _runSearch();
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(
+      showChainErrorSnack(
         context,
         'store.provider.add',
         e,
@@ -2392,7 +2392,7 @@ class _StoreDetailSheetState extends State<_StoreDetailSheet> {
     final r = await SystemActions.openInOs(widget.item.repository);
     if (!mounted) return;
     if (!r.ok) {
-      showFaiErrorSnack(
+      showChainErrorSnack(
         context,
         'store.repository.open',
         r.stderr.isEmpty ? 'open failed' : r.stderr,

lib/widgets/chain_error_box.dart

@@ -53,10 +53,10 @@ class ChainErrorBox extends StatefulWidget {
        );
 
   @override
-  State<ChainErrorBox> createState() => _FaiErrorBoxState();
+  State<ChainErrorBox> createState() => _ChainErrorBoxState();
 }
 
-class _FaiErrorBoxState extends State<ChainErrorBox> {
+class _ChainErrorBoxState extends State<ChainErrorBox> {
   bool _justCopied = false;
   bool _detailExpanded = false;
 

lib/widgets/chain_flow_output.dart

@@ -173,7 +173,7 @@ class _BytesView extends StatelessWidget {
       ).showSnackBar(SnackBar(content: Text(l.flowsOutputSavedAt(path))));
     } catch (e) {
       if (!context.mounted) return;
-      showFaiErrorSnack(context, 'flows.output.save', e);
+      showChainErrorSnack(context, 'flows.output.save', e);
     }
   }
 
@@ -234,7 +234,7 @@ class _FileView extends StatelessWidget {
     final target = uri.startsWith('file://') ? uri.substring(7) : uri;
     final r = await SystemActions.openInOs(target);
     if (!context.mounted || r.ok) return;
-    showFaiErrorSnack(
+    showChainErrorSnack(
       context,
       'flows.output.open',
       r.stderr.isEmpty ? 'open failed' : r.stderr,

lib/widgets/chain_module_sheet.dart

@@ -107,7 +107,7 @@ class _FaiModuleSheetState extends State<ChainModuleSheet> {
     } catch (e) {
       if (!mounted) return;
       setState(() => _uninstalling = false);
-      showFaiErrorSnack(context, 'modules.uninstall', e);
+      showChainErrorSnack(context, 'modules.uninstall', e);
     }
   }
 

lib/widgets/chain_settings_dialog.dart

@@ -100,7 +100,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       ).showSnackBar(SnackBar(content: Text(l.hubAuthTokenSavedToast)));
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'auth.hub-token.save', e);
+      showChainErrorSnack(context, 'auth.hub-token.save', e);
     }
   }
 
@@ -116,7 +116,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       ).showSnackBar(SnackBar(content: Text(l.hubAuthTokenClearedToast)));
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'auth.hub-token.clear', e);
+      showChainErrorSnack(context, 'auth.hub-token.clear', e);
     }
   }
 
@@ -141,7 +141,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       ).showSnackBar(SnackBar(content: Text(l.registryTokenSavedToast)));
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'auth.registry-token.save', e);
+      showChainErrorSnack(context, 'auth.registry-token.save', e);
     }
   }
 
@@ -156,7 +156,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       ).showSnackBar(SnackBar(content: Text(l.registryTokenClearedToast)));
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'auth.registry-token.clear', e);
+      showChainErrorSnack(context, 'auth.registry-token.clear', e);
     }
   }
 
@@ -186,7 +186,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       ).showSnackBar(SnackBar(content: Text(l.addedN8nToast(draft.name))));
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'settings.n8n.add', e);
+      showChainErrorSnack(context, 'settings.n8n.add', e);
     }
   }
 
@@ -197,7 +197,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       setState(() => _n8nEndpoints = list);
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'settings.n8n.remove', e);
+      showChainErrorSnack(context, 'settings.n8n.remove', e);
     }
   }
 
@@ -208,7 +208,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       setState(() => _n8nEndpoints = list);
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'settings.n8n.refresh', e);
+      showChainErrorSnack(context, 'settings.n8n.refresh', e);
     }
   }
 
@@ -238,7 +238,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       ).showSnackBar(SnackBar(content: Text(l.addedMcpToast(draft.name))));
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'settings.mcp.add', e);
+      showChainErrorSnack(context, 'settings.mcp.add', e);
     }
   }
 
@@ -249,7 +249,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       setState(() => _mcpClients = list);
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'settings.mcp.remove', e);
+      showChainErrorSnack(context, 'settings.mcp.remove', e);
     }
   }
 
@@ -260,7 +260,7 @@ class _FaiSettingsDialogState extends State<ChainSettingsDialog> {
       setState(() => _mcpClients = list);
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'settings.mcp.refresh', e);
+      showChainErrorSnack(context, 'settings.mcp.refresh', e);
     }
   }
 

lib/widgets/chain_stores_dialog.dart

@@ -114,7 +114,7 @@ class _ChainStoresDialogState extends State<ChainStoresDialog> {
       _reload();
     } catch (e) {
       if (mounted) {
-        showFaiErrorSnack(context, 'store.add', e,
+        showChainErrorSnack(context, 'store.add', e,
             title: AppLocalizations.of(context)!.storesManagerAddFailed);
       }
     } finally {
@@ -131,7 +131,7 @@ class _ChainStoresDialogState extends State<ChainStoresDialog> {
       _reload();
     } catch (e) {
       if (mounted) {
-        showFaiErrorSnack(context, 'store.remove', e,
+        showChainErrorSnack(context, 'store.remove', e,
             title: AppLocalizations.of(context)!.storesManagerRemoveFailed);
       }
     }

lib/widgets/chain_system_ai_editor.dart

@@ -271,7 +271,7 @@ class _FaiSystemAiEditorState extends State<ChainSystemAiEditor> {
       });
     } catch (e) {
       if (!mounted) return;
-      showFaiErrorSnack(context, 'settings.system-ai.cache-clear', e);
+      showChainErrorSnack(context, 'settings.system-ai.cache-clear', e);
     }
   }
 

pubspec.lock

@@ -46,7 +46,7 @@ packages:
       path: "../fai_chain_studio_flow_editor"
       relative: true
     source: path
-    version: "0.21.0"
+    version: "0.21.2"
   characters:
     dependency: transitive
     description: