chore: checkpoint current performance and UI changes

presentation/chat/chat_agents.py

@@ -115,10 +115,23 @@ class ChatAgentsMixin:
             if err:
                 self.status_message.emit(tr("chatpanel.agent_list_error", err=err))
 
-        w = AgentWorker(job)
-        w.finished_ok.connect(done)
-        self._agent_worker = w
-        w.start()
+        # Model discovery can involve a provider/network request.  Constructing
+        # the chat panel during startup must not wait for it; schedule it after
+        # the first event-loop turn so the initial shell can paint immediately.
+        from PySide6.QtCore import QTimer
+
+        if getattr(self, "_agent_refresh_pending", False):
+            return
+        self._agent_refresh_pending = True
+
+        def start_worker() -> None:
+            self._agent_refresh_pending = False
+            w = AgentWorker(job)
+            w.finished_ok.connect(done)
+            self._agent_worker = w
+            w.start()
+
+        QTimer.singleShot(0, start_worker)
 
     def _populate_agents(self, models, keep: str) -> None:
         """Đổ danh sách vào bộ chọn Agent.

presentation/chat/chat_history_widget.py

@@ -51,6 +51,8 @@ class MessageBubble(QFrame):
         super().__init__()
         self.role = role
         self._text = ""
+        self._stream_pending = False
+        self._render_count = 0
         self._collapsible = collapsible
         self._title = title
         self._head = None
@@ -164,12 +166,20 @@ class MessageBubble(QFrame):
     def append_delta(self, delta: str) -> None:
         """Nối thêm một mẩu văn bản đang phát dần từ model rồi vẽ lại dạng markdown."""
         self._text += delta
-        self.set_markdown(self._text)
+        if not self._stream_pending:
+            self._stream_pending = True
+            QTimer.singleShot(40, self.flush_stream)
+
+    def flush_stream(self) -> None:
+        if self._stream_pending:
+            self._stream_pending = False
+            self.set_markdown(self._text)
 
     def set_markdown(self, text: str) -> None:
         """Đặt toàn bộ nội dung, hiển thị dạng markdown, rồi co giãn lại chiều cao."""
         self._text = text
         self.body.setMarkdown(text)
+        self._render_count += 1
         self._autosize()
         if self._collapsible:
             self._update_head()
@@ -393,4 +403,3 @@ class ChatView(QScrollArea):
 ChatHistoryWidget = ChatView
 
 __all__ = ["ChatView", "ChatHistoryWidget", "MessageBubble"]
-

presentation/monitoring/monitoring_tab.py

@@ -19,6 +19,7 @@ from PySide6.QtWidgets import QHBoxLayout, QLabel, QTabWidget, QVBoxLayout, QWid
 from ...core import audit_log
 from ...i18n import on_language_changed, tr
 from ...state import AppContext
+from ...performance import span
 from .tabs.action_logs_tab import ActionLogsTab
 from .tabs.agent_status_tab import AgentStatusTab
 from .tabs.mcp_tab import McpTab
@@ -282,12 +283,13 @@ class MonitoringTab(QWidget):
         """
         start = date.today() - timedelta(days=_LOG_WINDOW_DAYS)
         shared_dir = self.ctx.config.shared_dir
-        if shared_dir:
-            from ...core import telemetry_shared
-            shared_events = telemetry_shared.load_shared_audit_events(shared_dir, start=start)
-            if shared_events:
-                return shared_events
-        return audit_log.load_events(start=start)
+        with span("monitoring.load_events", window_days=_LOG_WINDOW_DAYS):
+            if shared_dir:
+                from ...core import telemetry_shared
+                shared_events = telemetry_shared.load_shared_audit_events(shared_dir, start=start)
+                if shared_events:
+                    return shared_events
+            return audit_log.load_events(start=start)
 
     def _apply_events_to_event_tabs(self, events: List[dict]) -> None:
         """Filters the ALREADY-LOADED event list (see ``_load_events`` — one

presentation/shell/main_window.py

@@ -32,9 +32,7 @@ from .rail_metrics import _NAV_MIN_WIDTH
 from .tray_manager import TrayManager
 from ...state import AppContext
 from ...core.task_scheduler import TaskScheduler
-from ...ui.cowork_tab import CoworkTab
 from ...ui.sidebar import HistorySidebar
-from ..graph.structure_graph_view import StructureGraphView
 from ...ui.workspace_tab import WorkspaceTab
 
 
@@ -111,10 +109,9 @@ class MainWindow(NavRailMixin, RailProjectMixin, TopBarMixin,
         # Workspace screen (per selected project). GraphRAG's heavy
         # QtWebEngine is still built lazily on first display
         # (StructureGraphView._ensure_web).
+        from ...ui.cowork_tab import CoworkTab
         self.cowork = CoworkTab(ctx)
-        self.structure = StructureGraphView(ctx)
-        self.structure.status_message.connect(self.statusBar().showMessage)
-        self.cowork.output_changed.connect(self.structure.schedule_rescan)
+        self.structure = None
         self.cowork.status_message.connect(self.statusBar().showMessage)
         # Refresh History (list + running markers + current highlight) whenever a
         # conversation is created/updated or a turn finishes.

presentation/shell/session_events.py

@@ -42,7 +42,14 @@ class SessionEventsMixin:
             self.sidebar.refresh()
             self._refresh_rail_recents()   # the rail shortcut follows the panel
 
-        QTimer.singleShot(0, _do)
+        # Coalesce bursts from turn/tool/history signals into one sidebar read.
+        timer = getattr(self, "_history_refresh_timer", None)
+        if timer is None:
+            timer = QTimer(self)
+            timer.setSingleShot(True)
+            timer.timeout.connect(_do)
+            self._history_refresh_timer = timer
+        timer.start(0)
     def _on_scheduled_task_done(self, task_id: str, ok: bool) -> None:
         """Desktop notification for a finished scheduled task (toast always,
         tray balloon when the window isn't focused), then refresh History —
@@ -106,4 +113,5 @@ class SessionEventsMixin:
         """Project được tạo/sửa/xoá: gom nhóm lại cột lịch sử và cập nhật nhãn thư mục."""
         self.sidebar.refresh()                 # History regroups by project
         self.cowork._apply_output_folder_label()  # project may have been renamed
-        self.structure._refresh_project_combo()   # GraphRAG's project lock list follows too
+        if getattr(self, "structure", None) is not None:
+            self.structure._refresh_project_combo()   # GraphRAG's project lock list follows too