Bump version to 1.6.3

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/ai/conversation_details_panel_tests.rs

@@ -133,6 +133,8 @@ fn test_from_task_includes_linked_directory_when_run_id_matches() {
                 run_id: Some(task_id.to_string()),
                 autoexecute_override: None,
                 last_event_sequence: None,
+                progressive_summary: None,
+                messages_summarized_up_to: 0,
             },
         );
 
@@ -248,6 +250,8 @@ fn test_from_task_includes_linked_directory_when_server_token_matches() {
                 run_id: None,
                 autoexecute_override: None,
                 last_event_sequence: None,
+                progressive_summary: None,
+                messages_summarized_up_to: 0,
             },
         );