fix(state): heal alternation at the ACP / CLI-resume / TUI-resume restore sites too

Follow-up to the restore-boundary alternation heal (#65492): get_messages_
as_conversation grew a repair_alternation flag, wired into gateway
load_transcript and the CLI startup resume. Three other LIVE-REPLAY
restore sites still loaded the transcript verbatim, so a durable
'user;user' violation there re-fires the pre-request defensive repair on
every request for the rest of the session (it only ever mutates the
per-request list, never the restored working conversation):

- acp_adapter/session.py::SessionManager._restore — the loaded history
  becomes the resumed ACP (Zed) agent's SessionState.history.
- hermes_cli/cli_commands_mixin.py — the /resume slash command sets
  self.conversation_history from the load (the startup resume was fixed,
  this mid-session one was missed).
- tui_gateway/server.py — the resume handler feeds the load into the
  deferred session record's working conversation.

Pass repair_alternation=True at all three so the wedge is healed once at
restore. Inspection/export consumers (trace upload, context guard,
api_server history, display_history) keep the verbatim default.

Adds an end-to-end regression test driving the ACP _restore path: a
seeded user;user session restores to an alternation-clean live history
with no user input lost.

acp_adapter/session.py

@@ -534,9 +534,15 @@ class SessionManager:
 
         model = row.get("model") or None
 
-        # Load conversation history.
+        # Load conversation history. repair_alternation: this restore feeds
+        # LIVE REPLAY — the loaded list becomes the resumed agent's working
+        # conversation. A durable ``user;user`` violation left in state.db would
+        # otherwise re-fire the pre-request defensive repair on every request
+        # for the rest of the session (see hermes_state.get_messages_as_conversation).
         try:
-            history = db.get_messages_as_conversation(session_id)
+            history = db.get_messages_as_conversation(
+                session_id, repair_alternation=True
+            )
         except Exception:
             logger.warning("Failed to load messages for ACP session %s", session_id, exc_info=True)
             history = []