feat: align projects with shared UI foundations

src/govoplan_projects/backend/manifest.py

@@ -24,6 +24,7 @@ from govoplan_core.core.modules import (
     ModuleManifest,
     NavItem,
     PermissionDefinition,
+    ProductAreaContribution,
     RoleTemplate,
 )
 from govoplan_core.core.provider_governance import (
@@ -292,6 +293,17 @@ manifest = ModuleManifest(
                 order=36,
             ),
         ),
+        product_areas=(
+            ProductAreaContribution(
+                id="work",
+                module_id=MODULE_ID,
+                label="i18n:govoplan-core.product_area.work",
+                icon="list-checks",
+                description="i18n:govoplan-core.product_area.work_description",
+                surface_ids=("projects.nav.projects", "projects.route.projects"),
+                order=10,
+            ),
+        ),
         view_surfaces=(
             ViewSurface(
                 id="projects.navigation",