fix(routing): split stack detail URL from compose editor URL (#1605)

Sidebar opens /stacks/:name (anatomy). Monaco uses /compose|/env|/files.
Refresh of a detail URL no longer opens the editor, and editor deep links
keep a hydration shell instead of flashing the dashboard.

frontend/src/components/EditorLayout.tsx

@@ -349,6 +349,8 @@ export default function EditorLayout() {
     isFileLoading,
     activeTab,
     setActiveTab,
+    editingCompose,
+    setEditingCompose,
     selectedEnvFile,
     envFiles,
     loadFileForRoute: stackActions.loadFileForRoute,
@@ -843,6 +845,8 @@ export default function EditorLayout() {
             onFleetActiveTabChange={setFleetActiveTab}
             renderEditor={renderEditor}
             stackUpdates={stackUpdates}
+            urlHydratingStack={urlHydratingStack}
+            isFileLoading={isFileLoading}
           />
         </div>
       );