feat(postbox): enforce unified inbox separation

2026-08-20 04:22:29 +02:00
parent 174ee97719
commit 41ea8d8e23
16 changed files with 1029 additions and 25 deletions
@@ -182,7 +182,19 @@ for later reassignment do not leak counts into the projection.

 Every item and action continues to show the source function, unit, postbox,
 assignment/delegation context, and classification. Policy may require some
-postboxes to remain separate.
+postboxes to remain separate. Every exact Postbox and immutable template
+revision therefore selects one grouping rule: allow combining, combine only
+with the same classification, or always remain separate. The configured reason
+is returned as constraint provenance. Rules are checked both when saving a
+personal grouping and when reading any aggregate projection, so an existing
+preference cannot bypass a later policy or assignment change.
+
+The route parameter `?grouping=<personal-grouping-id>` is the stable,
+permission-neutral selector for a task-focused View. Postbox ignores an unknown
+or no-longer-visible selection, rechecks all sources, and never treats the View
+as authority. Temporarily unavailable source preferences remain stored without
+returning their metadata or counts and become eligible again only after current
+access is restored.

 ## Hierarchy Routing