Message Logger: restore deep in long chats, media through the master, photo fixes

- Deleted messages within the loaded part of a long chat are placed by the
  app among the others (not only at the chat's end), without counting as
  unread; restores no longer repeat every second.
- Logger copies and their media are read through a member of the log group
  signed in here (this account, else the master); the shared file cache
  lets the current account show them.
- Logged chat photos: asked for once per 10 minutes, all sizes downloaded
  (no waits on inline thumbnails), added once the photo viewer closed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/views/removed_chat.py

@@ -11,8 +11,8 @@ getHistory/getMessages for it (hooks/removed_chats.py).
 
 import threading
 
-import accounts
 import diag
+import media_share
 import peers
 import store
 import tg
@@ -124,17 +124,18 @@ class History:
             if pointer is not None:
                 by_group.setdefault(pointer[0], set()).add(pointer[1])
         found = {}
+        masters = [master, *self.api.masters()]
         for log_chat, ids in by_group.items():
             channel_id = peers.channel_id_from_marked(log_chat)
-            readers = accounts.with_access(
-                -channel_id, prefer=(self.account, accounts.slot_of(master))
-            )
-            if not readers:
+            reader = media_share.reader_for(self.account, log_chat, masters)
+            if reader is None:
                 continue
             ordered = sorted(ids)
             for start in range(0, len(ordered), _COPIES_PER_REQUEST):
                 chunk = ordered[start : start + _COPIES_PER_REQUEST]
-                for message_id, copy in _fetch(readers[0], -channel_id, chunk).items():
+                for message_id, copy in _fetch(reader, -channel_id, chunk).items():
+                    if reader != self.account:
+                        media_share.copy_media(reader, copy)
                     found[(log_chat, message_id)] = copy
         return found