FN-6058: improve mobile workflow node editor layout

Make the mobile workflow editor easier to use by collapsing competing panels and updating coverage.

- add a mobile inspector toggle that collapses node details and re-expands on node selection
- default the templates palette to collapsed on mobile and tighten mobile toolbar/layout styling to avoid overlap
- remove the stale workflow-id preselection path from the editor and align workflow edge/mobile regression coverage
- drop the unused modal prop wiring so the editor API matches the merged implementation

Files changed:
 packages/dashboard/app/components/AppModals.tsx    |   1 -
 .../app/components/WorkflowNodeEditor.css          |  61 +++++++++
 .../app/components/WorkflowNodeEditor.tsx          |  63 +++++++---
 .../__tests__/WorkflowNodeEditor.css.test.ts       |  21 ++++
 .../__tests__/WorkflowNodeEditor.test.tsx          | 139 +++++++++++----------
 5 files changed, 200 insertions(+), 85 deletions(-)

Fusion-Task-Id: FN-6058

Fusion-Task-Lineage: d037832f-8bd8-4e3d-b31b-e30cd9752838

packages/dashboard/app/components/WorkflowNodeEditor.css

@@ -557,6 +557,38 @@
   color: var(--text);
 }
 
+.wf-inspector-heading {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: var(--space-sm);
+}
+
+.wf-inspector-toggle {
+  display: inline-flex;
+  align-items: center;
+  gap: var(--space-xs);
+  padding: var(--space-xs) var(--space-sm);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  background: var(--bg-secondary);
+  color: var(--text);
+  font: inherit;
+  cursor: pointer;
+}
+
+.wf-inspector-toggle:hover {
+  background: var(--bg-tertiary);
+}
+
+.wf-inspector-toggle--collapsed {
+  position: absolute;
+  right: var(--space-sm);
+  bottom: var(--space-sm);
+  z-index: 5;
+  box-shadow: var(--shadow-sm);
+}
+
 .wf-field {
   display: flex;
   flex-direction: column;
@@ -1225,6 +1257,11 @@
     min-height: 0;
   }
 
+  .wf-editor-body--editor-stage .wf-editor-canvas {
+    flex: 1 1 auto;
+    min-height: 0;
+  }
+
   .wf-editor-body--editor-stage .wf-editor-inspector {
     width: 100%;
     min-width: 0;
@@ -1318,9 +1355,33 @@
   }
 
   .wf-editor-toolbar {
+    flex-wrap: nowrap;
     overflow-x: auto;
   }
 
+  .wf-editor-palette,
+  .wf-editor-actions {
+    flex: 0 0 auto;
+    flex-wrap: nowrap;
+  }
+
+  .wf-templates {
+    flex: 0 0 auto;
+  }
+
+  .wf-templates-header {
+    flex-wrap: nowrap;
+  }
+
+  .wf-templates-toggle {
+    flex: 0 0 auto;
+  }
+
+  .wf-inspector-toggle {
+    min-height: var(--wf-editor-touch-target);
+    padding: var(--space-sm) var(--space-md);
+  }
+
   .wf-ai-panel {
     position: fixed;
     inset: var(--space-sm);