feat: select users in campaign access explanations

src/govoplan_campaign/backend/manifest.py

@@ -669,7 +669,9 @@ manifest = ModuleManifest(
                 "and ownership-transfer records describe governance visibility separately from the content grant. Saved imports expose "
                 "only their stable source identity and revision, while independently user-owned mapping profiles never inherit a Campaign "
                 "share. Persisted validation, build, snapshot, and review artifacts use typed version references. Reusable templates and "
-                "durable export packages stay with their optional owning modules and fail closed when Campaign is asked to explain them."
+                "durable export packages stay with their optional owning modules and fail closed when Campaign is asked to explain them. "
+                "The shared explanation dialog evaluates the signed-in user by default. Policy may permit a tenant-bounded selected-user "
+                "administrator diagnostic; Access returns only permitted subject metadata and records every cross-user explanation in audit evidence."
             ),
             layer="available",
             documentation_types=("admin",),
@@ -693,7 +695,7 @@ manifest = ModuleManifest(
                     kind="repository",
                 ),
             ),
-            related_modules=("access", "mail", "postbox", "templates"),
+            related_modules=("access", "audit", "mail", "policy", "postbox", "templates"),
             translations={
                 "de": {
                     "title": "Zugriff auf untergeordnete Campaign-Nachweise erklaeren",