diff --git a/docs/ACCESSIBILITY_REVIEW.md b/docs/ACCESSIBILITY_REVIEW.md
index 671a8bd..5047425 100644
--- a/docs/ACCESSIBILITY_REVIEW.md
+++ b/docs/ACCESSIBILITY_REVIEW.md
@@ -31,6 +31,31 @@ unlabelled icon-only buttons in the message preview, and Campaign-local modal
 implementations that bypass Core's `Dialog`. It complements rather than replaces
 browser and assistive-technology testing.
 
+The guard also verifies that Campaign retains narrow-viewport layouts, visible
+keyboard focus for domain-specific controls, and an explicit reduced-motion
+override. Shared dialog focus trapping and restoration are tested in Core;
+Campaign tests verify that overlays continue to use that shared primitive.
+
+## Release evidence
+
+The feature implementation can be closed once the structural contract, shared
+Core component tests, TypeScript graph, and representative responsive overlay
+tests pass. The seven-step matrix above remains a release-candidate checklist:
+it must be repeated for the exact browser, language packages, theme, density,
+and assistive-technology combination being certified. Closing the implementation
+ticket does not make a general WCAG-conformance claim for future releases.
+
+Implementation closure evidence recorded on 2026-08-03 used headless Chromium
+against the configured development system. It covered all 13 Campaign routes at
+1440 CSS pixels, the list, overview, recipients, and review routes at 320 CSS
+pixels, reduced-motion rendering, semantic accessibility-tree snapshots, HTTP
+500/page-error capture, and 42 sampled Tab stops across desktop and narrow
+Review & Send. The run found no unnamed interactive controls, hidden focus,
+page-level horizontal overflow, titlebar overlap, or unhandled runtime errors.
+Representative list, overview, review, and narrow-review screenshots were also
+inspected. This is implementation evidence; release certification still uses
+the complete matrix above with the selected screen reader and browser versions.
+
 ## Known boundary
 
 Translation keys may be visible in source because Core resolves them at runtime.
diff --git a/src/govoplan_campaign/backend/manifest.py b/src/govoplan_campaign/backend/manifest.py
index b76cd7e..5e39bb2 100644
--- a/src/govoplan_campaign/backend/manifest.py
+++ b/src/govoplan_campaign/backend/manifest.py
@@ -527,7 +527,6 @@ manifest = ModuleManifest(
                 order=22,
                 surface_id=REPORTS_SURFACE_ID,
             ),
-            FrontendRoute(path="/templates", component="TemplatesPage", order=90),
         ),
         nav_items=(
             NavItem(
@@ -537,9 +536,6 @@ manifest = ModuleManifest(
                 required_any=CAMPAIGN_MODULE_REQUIRED_ANY,
                 order=20,
             ),
-            NavItem(
-                path="/templates", label="Templates", icon="layout-template", order=90
-            ),
         ),
         view_surfaces=(
             ViewSurface(
@@ -808,7 +804,7 @@ manifest = ModuleManifest(
             id="campaigns.workflow.prepare-validate-and-build",
             title="Prepare, validate, and build a campaign",
             summary="Turn governed recipient, template, attachment, and Mail-profile inputs into exact built messages for review.",
-            body="Prepare each input in its owning surface, resolve every blocking validation issue, and build exact recipient messages before review. Campaign freezes recipient and attachment evidence for the selected version; later source changes do not silently alter that build.",
+            body="Prepare each input in its owning surface, resolve every blocking validation issue, and build exact recipient messages before review. Campaign freezes recipient and attachment evidence for the selected version; later source changes do not silently alter that build. When the Templates module is installed, its single Templates navigation entry owns the reusable library while campaign-specific composition remains in the campaign workspace.",
             layer="configured",
             documentation_types=("user",),
             audience=("campaign_manager", "campaign_author"),
@@ -836,7 +832,7 @@ manifest = ModuleManifest(
                     kind="repository",
                 ),
             ),
-            related_modules=("addresses", "files", "mail"),
+            related_modules=("addresses", "files", "mail", "templates"),
             unlocks=(
                 "A reviewable build whose exact recipient-specific effects can be inspected before delivery.",
             ),
diff --git a/src/govoplan_campaign/backend/routes/attachments.py b/src/govoplan_campaign/backend/routes/attachments.py
index bae23f9..4ebb65a 100644
--- a/src/govoplan_campaign/backend/routes/attachments.py
+++ b/src/govoplan_campaign/backend/routes/attachments.py
@@ -23,6 +23,9 @@ from govoplan_campaign.backend.path_security import (
     assert_server_safe_campaign_paths,
 )
 from govoplan_campaign.backend.campaign.loader import load_campaign_json
+from govoplan_campaign.backend.campaign.mail_profile_boundary import (
+    CampaignMailProfileBoundaryError,
+)
 from govoplan_campaign.backend.attachments.resolver import resolve_campaign_attachments
 from govoplan_campaign.backend.persistence.versions import (
     is_version_final_locked,
@@ -324,7 +327,7 @@ def preview_campaign_attachments(
             include_unmatched=payload.include_unmatched,
             include_unlinked_candidates=payload.include_unlinked_candidates,
         )
-    except CampaignPathSecurityError as exc:
+    except (CampaignPathSecurityError, CampaignMailProfileBoundaryError) as exc:
         raise HTTPException(
             status_code=status.HTTP_422_UNPROCESSABLE_CONTENT, detail=str(exc)
         ) from exc
diff --git a/tests/test_mail_profile_boundary.py b/tests/test_mail_profile_boundary.py
index e42b99a..11e953e 100644
--- a/tests/test_mail_profile_boundary.py
+++ b/tests/test_mail_profile_boundary.py
@@ -7,6 +7,7 @@ import pytest
 from fastapi import HTTPException
 
 from govoplan_campaign.backend import route_support
+from govoplan_campaign.backend.routes import attachments as attachment_routes
 from govoplan_campaign.backend.routes import versions as router
 from govoplan_campaign.backend.campaign.loader import CampaignSchemaError, validate_against_schema
 from govoplan_campaign.backend.campaign.mail_profile_boundary import (
@@ -94,6 +95,42 @@ def test_loader_rejects_inline_transport_before_optional_mail_summary() -> None:
             )
 
 
+def test_attachment_preview_reports_legacy_mail_boundary_as_validation_error() -> None:
+    campaign = SimpleNamespace(id="campaign-1")
+    version = SimpleNamespace(
+        id="version-1",
+        campaign_id=campaign.id,
+        raw_json=_campaign_json({"smtp": {"host": "legacy.example.test"}}),
+    )
+    principal = SimpleNamespace(
+        tenant_id="tenant-1",
+        user=SimpleNamespace(id="user-1"),
+    )
+
+    with (
+        patch.object(attachment_routes, "_get_campaign_for_principal"),
+        patch.object(attachment_routes, "_require_permission"),
+        patch.object(attachment_routes, "_get_campaign_for_tenant", return_value=campaign),
+        patch.object(attachment_routes, "_get_version_for_tenant", return_value=version),
+        patch.object(attachment_routes, "_require_mail_profile_use_if_needed"),
+        patch.object(
+            attachment_routes,
+            "_attachment_preview_for_version",
+            side_effect=CampaignMailProfileBoundaryError("Select an authorized Mail profile."),
+        ),
+        pytest.raises(HTTPException) as captured,
+    ):
+        attachment_routes.preview_campaign_attachments(
+            campaign.id,
+            version.id,
+            session=object(),  # type: ignore[arg-type]
+            principal=principal,  # type: ignore[arg-type]
+        )
+
+    assert captured.value.status_code == 422
+    assert captured.value.detail == "Select an authorized Mail profile."
+
+
 def test_loader_uses_only_non_secret_mail_profile_capabilities() -> None:
     raw = _campaign_json({"mail_profile_id": "profile-1"})
 
diff --git a/tests/test_manifest_navigation.py b/tests/test_manifest_navigation.py
index c2bad5d..636fa7b 100644
--- a/tests/test_manifest_navigation.py
+++ b/tests/test_manifest_navigation.py
@@ -62,3 +62,12 @@ def test_aggregate_reports_are_an_integrated_campaign_view() -> None:
     ]
     assert len(report_surfaces) == 1
     assert report_surfaces[0].description == "/campaigns/reports"
+
+
+def test_reusable_template_library_is_not_owned_by_campaign() -> None:
+    manifest = get_manifest()
+    assert manifest.frontend is not None
+
+    assert "/templates" not in {item.path for item in manifest.nav_items}
+    assert "/templates" not in {item.path for item in manifest.frontend.nav_items}
+    assert "/templates" not in {route.path for route in manifest.frontend.routes}
diff --git a/webui/src/features/campaigns/CampaignAuditPage.tsx b/webui/src/features/campaigns/CampaignAuditPage.tsx
index 561a5e5..f1987c0 100644
--- a/webui/src/features/campaigns/CampaignAuditPage.tsx
+++ b/webui/src/features/campaigns/CampaignAuditPage.tsx
@@ -5,6 +5,7 @@ import { DismissibleAlert } from "@govoplan/core-webui";
 import { PageTitle } from "@govoplan/core-webui";
 import VersionLine from "./components/VersionLine";
 import { LoadingFrame } from "@govoplan/core-webui";
+import { ActionBlockerHint, DocumentationHelpLink } from "@govoplan/core-webui";
 import { useCampaignWorkspaceData } from "./hooks/useCampaignWorkspaceData";
 
 export default function CampaignAuditPage({ settings, campaignId }: {settings: ApiSettings;campaignId: string;}) {
@@ -27,7 +28,27 @@ export default function CampaignAuditPage({ settings, campaignId }: {settings: A
 
       <LoadingFrame loading={loading} label="i18n:govoplan-campaign.loading_audit_data.af52b968">
       <Card title="i18n:govoplan-campaign.recent_audit_events.7ec32b1d">
-        <p className="muted">i18n:govoplan-campaign.campaign_specific_audit_api_integration_will_be_.e53c8280</p>
+        <ActionBlockerHint
+          tone="info"
+          reason={{
+            summary: "Campaign-specific audit projection is not available on this page.",
+            details: "Campaign actions already emit bounded platform audit evidence. Authorized readers can inspect it in the Audit administration surface.",
+            requiredAction: "Open tenant audit and filter by the campaign identifier.",
+            actor: "Audit reader or system operator",
+            target: "Administration > Tenant audit"
+          }}
+          documentation={{
+            topicId: "campaigns.reference.composition-assurance",
+            documentationType: "admin"
+          }}
+        />
+        <DocumentationHelpLink
+          reference={{
+            topicId: "campaigns.reference.composition-assurance",
+            documentationType: "user"
+          }}
+          label="Open Campaign assurance documentation"
+        />
       </Card>
       </LoadingFrame>
     </div>);
diff --git a/webui/src/features/campaigns/CampaignJsonView.tsx b/webui/src/features/campaigns/CampaignJsonView.tsx
index 7d7edd3..3f12dd0 100644
--- a/webui/src/features/campaigns/CampaignJsonView.tsx
+++ b/webui/src/features/campaigns/CampaignJsonView.tsx
@@ -29,6 +29,11 @@ export default function CampaignJsonView({ settings, campaignId }: {settings: Ap
         </div>
       </div>
       {error && <DismissibleAlert tone="danger" resetKey={error} floating>{error}</DismissibleAlert>}
+      <DismissibleAlert tone="warning" dismissible={false}>
+        This expert view contains the complete authorized campaign configuration,
+        including recipient and message fields that may contain personal data.
+        Download and share it only for an authorized purpose.
+      </DismissibleAlert>
       <LoadingFrame loading={loading} label="i18n:govoplan-campaign.loading_json.812c7a50">
       <Card>
         {!loading || version ? <pre className="code-panel">{JSON.stringify(campaignJson, null, 2)}</pre> : <pre className="code-panel">{"{}"}</pre>}
diff --git a/webui/src/features/campaigns/review/AttachmentLinkingPreview.tsx b/webui/src/features/campaigns/review/AttachmentLinkingPreview.tsx
index e4a146b..c5c306c 100644
--- a/webui/src/features/campaigns/review/AttachmentLinkingPreview.tsx
+++ b/webui/src/features/campaigns/review/AttachmentLinkingPreview.tsx
@@ -1,6 +1,6 @@
 import { useState } from "react";
 import { Link2, X } from "lucide-react";
-import { Button, Dialog, i18nMessage } from "@govoplan/core-webui";
+import { Button, Dialog, DismissibleAlert, i18nMessage } from "@govoplan/core-webui";
 
 import type {
   CampaignAttachmentPreviewFile,
@@ -108,7 +108,11 @@ export default function AttachmentLinkingPreview({
             value={loading ? "..." : preview?.shared_file_count ?? "—"}
           />
         </div>
-        {error && <p className="review-flow-inline-note is-danger">{error}</p>}
+        {error && (
+          <DismissibleAlert tone="danger" compact dismissible={false}>
+            {error}
+          </DismissibleAlert>
+        )}
         {!error && unlinkedCount > 0 && (
           <p className="review-flow-inline-note is-stale">
             i18n:govoplan-campaign.unlinked_candidate_files_are_not_yet_part_of_the.b8fd5998
diff --git a/webui/src/module.ts b/webui/src/module.ts
index 7bb314c..5bf928a 100644
--- a/webui/src/module.ts
+++ b/webui/src/module.ts
@@ -17,7 +17,6 @@ import "./styles/campaign-workspace.css";
 
 const CampaignModulePage = lazy(() => import("./features/campaigns/CampaignModulePage"));
 const CampaignWorkspace = lazy(() => import("./features/campaigns/CampaignWorkspace"));
-const TemplatesPage = lazy(() => import("./features/templates/TemplatesPage"));
 
 const campaignRead = ["campaigns:campaign:read"];
 const reportRead = ["campaigns:report:read"];
@@ -91,16 +90,14 @@ export const campaignModule: PlatformWebModule = {
     }
   ],
   navItems: [
-  { to: "/campaigns", label: "i18n:govoplan-campaign.campaigns.01a23a28", iconName: "campaign", anyOf: campaignModuleRead, order: 20 },
-  { to: "/templates", label: "i18n:govoplan-campaign.templates.f25b700e", iconName: "layout-template", order: 90 }],
+  { to: "/campaigns", label: "i18n:govoplan-campaign.campaigns.01a23a28", iconName: "campaign", anyOf: campaignModuleRead, order: 20 }],
 
   routes: [
   { path: "/campaigns", anyOf: campaignModuleRead, order: 20, render: ({ settings, auth }) => createElement(CampaignModuleLandingRoute, { settings, auth }) },
   { path: "/operator", anyOf: OPERATOR_QUEUE_ROUTE_SCOPES, allOf: campaignRead, order: 21, surfaceId: operatorQueueSurface, render: () => createElement(Navigate, { to: "/campaigns/queue", replace: true }) },
   { path: "/campaigns/queue", anyOf: OPERATOR_QUEUE_ROUTE_SCOPES, allOf: campaignRead, order: 21, surfaceId: operatorQueueSurface, render: ({ settings, auth }) => createElement(CampaignModulePage, { active: "queue", settings, auth }) },
   { path: "/campaigns/reports", anyOf: reportRead, order: 22, surfaceId: reportsSurface, render: ({ settings, auth }) => createElement(CampaignModulePage, { active: "reports", settings, auth }) },
-  { path: "/campaigns/:campaignId/*", anyOf: campaignRead, order: 22, render: ({ settings, auth }) => createElement(CampaignResourceRoute, { settings, auth }) },
-  { path: "/templates", order: 90, render: () => createElement(TemplatesPage) }],
+  { path: "/campaigns/:campaignId/*", anyOf: campaignRead, order: 22, render: ({ settings, auth }) => createElement(CampaignResourceRoute, { settings, auth }) }],
   uiCapabilities: {
     "dashboard.widgets": campaignDashboardWidgets,
     "wizard.directories": campaignWizardDirectories
diff --git a/webui/tests/accessibility-contract.test.mjs b/webui/tests/accessibility-contract.test.mjs
index 5023a35..d2dff49 100644
--- a/webui/tests/accessibility-contract.test.mjs
+++ b/webui/tests/accessibility-contract.test.mjs
@@ -32,6 +32,47 @@ const preview = fs.readFileSync(
   path.join(sourceRoot, "features/campaigns/components/MessagePreviewOverlay.tsx"),
   "utf8",
 );
+
+const styles = fs.readFileSync(
+  path.join(sourceRoot, "styles/campaign-workspace.css"),
+  "utf8",
+);
+const jsonView = fs.readFileSync(
+  path.join(sourceRoot, "features/campaigns/CampaignJsonView.tsx"),
+  "utf8",
+);
+const auditView = fs.readFileSync(
+  path.join(sourceRoot, "features/campaigns/CampaignAuditPage.tsx"),
+  "utf8",
+);
+const attachmentPreview = fs.readFileSync(
+  path.join(sourceRoot, "features/campaigns/review/AttachmentLinkingPreview.tsx"),
+  "utf8",
+);
+assert.ok(
+  jsonView.includes('DismissibleAlert tone="warning" dismissible={false}'),
+  "The full Campaign JSON projection must retain an explicit privacy warning",
+);
+assert.ok(
+  auditView.includes("ActionBlockerHint"),
+  "Unavailable Campaign audit projection must retain an actionable shared blocker",
+);
+assert.ok(
+  attachmentPreview.includes('<DismissibleAlert tone="danger" compact dismissible={false}>'),
+  "Attachment-preview validation failures must use the compact shared alert",
+);
+assert.ok(
+  styles.includes("@media (prefers-reduced-motion: reduce)"),
+  "Campaign must retain an explicit reduced-motion presentation contract",
+);
+assert.ok(
+  styles.includes("@media (max-width:"),
+  "Campaign must retain responsive narrow-viewport layouts",
+);
+assert.ok(
+  styles.includes(":focus-visible"),
+  "Campaign-specific interactive controls must retain visible keyboard focus",
+);
 for (const handler of ["onFirst", "onPrevious", "onNext", "onLast"]) {
   const buttonLine = preview
     .split("\n")