feat(ui,api,telegram): shared conversation panel for obsidian and /admin/panel, bind materializes a window, inbox survives link previews

src/beaver_gateway/frontends/telegram/inbox.py

@@ -35,6 +35,10 @@ _log = logging.getLogger("beaver_gateway.frontends.telegram.inbox")
 ALLOWED_UPDATES = ("message", "callback_query")
 
 
+def _unset(_value: object) -> None:
+    """Unset aiogram ``Default`` sentinels (link previews) are stored as null."""
+
+
 class Inbox:
     def __init__(
         self,
@@ -85,7 +89,9 @@ class Inbox:
     async def _store(self, update: Update) -> None:
         row = TelegramUpdate(
             update_id=update.update_id,
-            payload=update.model_dump(mode="json", by_alias=True, exclude_none=True),
+            payload=update.model_dump(
+                mode="json", by_alias=True, exclude_none=True, fallback=_unset
+            ),
         )
         async with self._db.session() as session:
             session.add(row)