feat(R08): finalize Chat UI Hub components, AudioRecorderWidget, and integration tests (100% PASS)

presentation/chat/chat_helpers.py

@@ -6,21 +6,9 @@ from __future__ import annotations
 
 from pathlib import Path
 from typing import Any, Dict, List, Optional
-from PySide6.QtCore import Qt, QTimer, Signal
-from PySide6.QtCore import QFileSystemWatcher
-from PySide6.QtWidgets import (
-    QComboBox, QHBoxLayout, QLabel, QMessageBox, QPushButton, QSplitter,
-    QVBoxLayout, QWidget,
-)
-from ...core.worker import AgentWorker
-from ...i18n import on_language_changed, tr
-from ...state import AppContext
-from ...theme import current_palette
-from ...ui.chat_view import ChatView, ThinkingIndicator
-from ...ui.composer import Composer
-from ...ui.icons import collapse_right_icon, icon as app_icon
-from ...ui.osutil import is_image, open_path
-from ...ui.widgets import CollapsibleSection, CollapseStrip, PlanSection
+
+_PLAN_ICONS = {"pending": "○", "running": "▶", "done": "✓", "error": "✗"}
+
 
 
 def _format_plan_steps(steps) -> str: