feat(studio): per-field ports in flow editor + store-doc scroll fix

Picks up:
- fai_studio_flow_editor 0.9.0: per-field input + output
  ports rendered from ModuleInfo, i18n tooltips, four
  additional canvas patterns ported from jai_client.
- fai_client_sdk 0.18.0: regenerated ModuleField bindings
  for the schema_version 3 / per-field-description proto
  bump in fai/platform.

Wires StudioFlowRunDriver.moduleInfo so the editor can
fetch declared field info per step capability. The hub
maps schema_version 3 manifest fields (inputs/outputs
with description.en/de) through ModuleInfoResponse; this
patch wraps them back into the editor's ModuleSpec /
ModuleField vocabulary so the canvas paints them as
distinct anchors with hover tooltips.

ModuleDetail in hub.dart now carries the same inputs +
outputs lists (with ModuleFieldInfo type + i18n
description map), enabling other Studio surfaces — e.g.
the module-detail sheet — to render bilingual field docs
in a later pass.

Plus: store-doc nested-scroll fix. The module detail
panel's docs section sat inside its own 480px viewport
inside the outer sheet's SingleChildScrollView, producing
the double-scrollbar feel. Setting
physics: NeverScrollableScrollPhysics on the Markdown
widget and dropping the maxHeight lets the docs scroll
as part of the outer sheet — one scrollbar, predictable
mouse-wheel behaviour.

Bumps fai_studio to 0.56.0.

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

lib/data/flow_run_driver.dart

@@ -40,6 +40,39 @@ class StudioFlowRunDriver implements editor.FlowRunDriver {
     return mapped;
   }
 
+  @override
+  Future<editor.ModuleSpec?> moduleInfo(String capability) async {
+    try {
+      final detail = await HubService.instance.moduleInfo(capability);
+      return editor.ModuleSpec(
+        capability: capability,
+        inputs: detail.inputs
+            .map(
+              (f) => editor.ModuleField(
+                name: f.name,
+                type: f.type,
+                description: f.description,
+              ),
+            )
+            .toList(),
+        outputs: detail.outputs
+            .map(
+              (f) => editor.ModuleField(
+                name: f.name,
+                type: f.type,
+                description: f.description,
+              ),
+            )
+            .toList(),
+      );
+    } catch (_) {
+      // Module not installed locally, or transient hub error.
+      // Returning null lets the editor fall back to YAML-
+      // derived ports instead of failing the whole canvas.
+      return null;
+    }
+  }
+
   @override
   Stream<editor.FlowRunEvent> events() {
     return HubService.instance
@@ -82,10 +115,7 @@ class StudioFlowRunDriver implements editor.FlowRunDriver {
           error: e.error ?? '',
         );
       case 'step.awaiting_approval':
-        return editor.StepAwaitingApproval(
-          flowName: flowName,
-          stepId: stepId,
-        );
+        return editor.StepAwaitingApproval(flowName: flowName, stepId: stepId);
     }
     return null;
   }