feat: align campaign with shared UI foundations

src/govoplan_campaign/backend/manifest.py

@@ -35,6 +35,7 @@ from govoplan_core.core.modules import (
     ModuleManifest,
     NavItem,
     PermissionDefinition,
+    ProductAreaContribution,
     RoleTemplate,
 )
 from govoplan_core.core.reporting import REPORT_PROVIDER_CAPABILITY_PREFIX
@@ -576,6 +577,23 @@ manifest = ModuleManifest(
                 order=20,
             ),
         ),
+        product_areas=(
+            ProductAreaContribution(
+                id="communication",
+                module_id="campaigns",
+                label="i18n:govoplan-core.product_area.communication",
+                icon="mail",
+                description="i18n:govoplan-core.product_area.communication_description",
+                surface_ids=(
+                    "campaigns.nav.campaigns",
+                    "campaigns.route.campaigns",
+                    "campaigns.route.operator-redirect",
+                    OPERATOR_QUEUE_SURFACE_ID,
+                    REPORTS_SURFACE_ID,
+                ),
+                order=40,
+            ),
+        ),
         view_surfaces=(
             ViewSurface(
                 id="campaigns.widget.activity",