v1.8.17: revert broken undo, keep only alias-edit feature

Fully reverted sidebar, files_tab, totp_tab, server_dialog to v1.8.10
base. Removed all entry_undo bindings that broke Ctrl+V paste globally.
Only alias editing feature preserved (editable alias + rename support).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/server_store.py

@@ -359,7 +359,6 @@ class ServerStore:
             if s["alias"] == alias:
                 new_alias = updated.get("alias", alias)
                 servers[i] = updated
-                # If alias changed, migrate status
                 if new_alias != alias:
                     with self._statuses_lock:
                         old_status = self._statuses.pop(alias, None)