fix(sessions): reset token counts to 0 on /new (#1523)

- Set inputTokens, outputTokens, totalTokens to 0 in sessions.reset
- Clear TUI sessionInfo tokens immediately before async reset
- Prevents stale token display after session reset

Fixes #1523

src/tui/tui-command-handlers.ts

@@ -408,6 +408,12 @@ export function createCommandHandlers(context: CommandHandlerContext) {
       case "new":
       case "reset":
         try {
+          // Clear token counts immediately to avoid stale display (#1523)
+          state.sessionInfo.inputTokens = null;
+          state.sessionInfo.outputTokens = null;
+          state.sessionInfo.totalTokens = null;
+          tui.requestRender();
+
           await client.resetSession(state.currentSessionKey);
           chatLog.addSystem(`session ${state.currentSessionKey} reset`);
           await loadHistory();