Adopt shared WebUI structural primitives

docs/INTERFACE_PATTERN_MIGRATION.md

@@ -0,0 +1,25 @@
+# Docs Interface Pattern Migration
+
+The Docs route composes the platform interface language without owning a
+parallel shell. Core owns its navigation/content pane geometry and page frame;
+Docs owns audience filtering, version selection, topic navigation, configured
+documentation projection, and evidence presentation.
+
+## Surface contract
+
+- `WorkspaceLayout` owns the outline/content regions, pane width, scrolling,
+  accessible labels, and narrow-layout navigation behavior.
+- `PageLayout` owns the content inset, sticky heading, audience-aware page
+  identity, reload action placement, error and loading regions, and responsive
+  action flow.
+- `ExplorerTree`, `SegmentedControl`, `DataGrid`, `DescriptionList`, dialogs,
+  alerts, and status badges retain their Core interaction and accessibility
+  contracts.
+- Docs-specific CSS remains limited to the documentation tree, reading column,
+  topic typography, page outline, and reference content. It no longer defines
+  the outer workspace grid or page skeleton.
+
+The module keeps user/admin audience boundaries, installed-version selection,
+topic URLs, configured-state projection, and evidence visibility unchanged.
+The platform layout checker rejects restoring a raw Docs page or workspace
+frame.

src/govoplan_docs/backend/manifest.py

@@ -47,6 +47,11 @@ ARCHITECTURE = ModuleArchitectureDeclaration(
             reference="docs/DOCUMENTATION_LAYER_CONCEPT.md",
             summary="Defines the manifest-driven documentation boundary.",
         ),
+        ModuleMaturityEvidence(
+            kind="documentation",
+            reference="docs/INTERFACE_PATTERN_MIGRATION.md",
+            summary="Records the Core-owned Docs workspace and page-layout boundary.",
+        ),
     ),
     known_limits=(
         "Architecture declarations are in staged adoption, so undeclared modules remain visible as pending.",

webui/src/features/docs/DocsPage.tsx

@@ -8,10 +8,10 @@ import {
   Dialog,
   DismissibleAlert,
   ExplorerTree,
-  LoadingFrame,
-  PageTitle,
+  PageLayout,
   SegmentedControl,
   StatusBadge,
+  WorkspaceLayout,
   adminErrorMessage,
   useGuardedNavigate,
   usePlatformLanguage,
@@ -133,7 +133,14 @@ export default function DocsPage({ settings }: { settings: ApiSettings }) {
   }, [treeNodes, selectedPage?.id]);
 
   return (
-    <div className="workspace module-workspace docs-workspace">
+    <WorkspaceLayout
+      className="module-workspace docs-workspace"
+      primarySize="wide"
+      primaryLabel="i18n:govoplan-docs.documentation_outline.6f836b99"
+      contentLabel="i18n:govoplan-docs.help_center.f3f3a34b"
+      documentationType={documentationType}
+      contentClassName="docs-workspace-content"
+      primary={(
         <aside className="section-sidebar docs-outline" aria-label="i18n:govoplan-docs.documentation_outline.6f836b99">
           <div className="docs-sidebar-header">
             <div className="section-title">i18n:govoplan-docs.help_center.f3f3a34b</div>
@@ -181,21 +188,19 @@ export default function DocsPage({ settings }: { settings: ApiSettings }) {
             />
           </nav>
         </aside>
-      <section className="workspace-content docs-workspace-content">
-        <div className="content-pad workspace-data-page docs-page">
-          <div className="page-heading split workspace-heading">
-            <div>
-              <PageTitle loading={loading}>i18n:govoplan-docs.help_center.f3f3a34b</PageTitle>
-              <p>{adminDocs ? "i18n:govoplan-docs.technical_documentation_for_the_modules_and_conf.267e739e" : "i18n:govoplan-docs.guidance_for_the_functions_available_in_this_ins.723b7cad"}</p>
-            </div>
-            <div className="button-row compact-actions">
-              <Button onClick={() => void load()} disabled={loading}><RefreshCw size={16} /> i18n:govoplan-docs.reload.cce71553</Button>
-            </div>
-          </div>
-
-          {error && <DismissibleAlert tone="danger" resetKey={error} floating>{error}</DismissibleAlert>}
-
-          <LoadingFrame loading={loading} label="i18n:govoplan-docs.loading_documentation_context.1c091645">
+      )}
+    >
+      <PageLayout
+        title="i18n:govoplan-docs.help_center.f3f3a34b"
+        description={adminDocs ? "i18n:govoplan-docs.technical_documentation_for_the_modules_and_conf.267e739e" : "i18n:govoplan-docs.guidance_for_the_functions_available_in_this_ins.723b7cad"}
+        actions={<Button onClick={() => void load()} disabled={loading}><RefreshCw size={16} /> i18n:govoplan-docs.reload.cce71553</Button>}
+        loading={loading}
+        loadingLabel="i18n:govoplan-docs.loading_documentation_context.1c091645"
+        error={error}
+        mode="workspace"
+        documentationType={documentationType}
+        className="docs-page"
+      >
         <div className="docs-content">
           <main className="docs-page-main">
             <SelectedPageContent
@@ -215,10 +220,8 @@ export default function DocsPage({ settings }: { settings: ApiSettings }) {
           </main>
           <PageOutline items={outlineItems} />
         </div>
-          </LoadingFrame>
-        </div>
-      </section>
-    </div>
+      </PageLayout>
+    </WorkspaceLayout>
   );
 
   function selectDocumentationType(type: DocumentationType) {