fix(qa): resolve DF-002 through DF-011 from QA defect tracking sheet

Batch of fixes for defects tracked in "Task Tracking Template.xlsx" (sheet
Defect Management), verified against the sheet's Root Cause/Cach xu ly
columns before this commit:

- DF-002: Co4E node status not reflected after tab switch + missing
  edit-lock on running/done nodes (node_property_panel.py, co4e_runs.py,
  co4e_workflow_crud.py, co4e_canvas_widget.py, co4e_flow_tabs.py,
  canvas_items.py)
- DF-003: hide the run.bat console window unless the app exits with an
  error (run.bat, scripts/console_visibility.ps1 - new)
- DF-004: floating Help Assistant icon covering the Send button after a
  window resize (presentation/shell/main_window.py)
- DF-005: "block network" toggle didn't stop ICMP/raw-socket tools like
  ping (infrastructure/filesystem/command_tools.py,
  security/command_risk_classifier.py)
- DF-006: Monitoring "gay nang khi log lon" - root cause was re-reading
  the ENTIRE audit log history every 3s tick, not missing pagination;
  bounded to a 30-day window (presentation/monitoring/monitoring_tab.py)
  AND added the "So dong/trang" page-size control the ticket also asked
  for (presentation/monitoring/shared/event_table.py,
  shared/filter_scaffold.py, tabs/action_logs_tab.py, tabs/mcp_tab.py,
  tabs/security_events_tab.py, i18n/agents_admin_tab.py)
- DF-007: support choosing a OneDrive/SharePoint folder as a project's
  working directory via Microsoft Graph, downloaded as a local mirror
  with manual sync (core/projects.py, core/ms365_graph.py,
  core/cloud_workspace_sync.py - new, ui/ms365_signin_dialog.py - new,
  ui/cloud_folder_picker_dialog.py - new, i18n/cloud_workspace.py - new,
  ui/workspace_tab.py)
- DF-008: AI-edit instruction box was a fixed-height single-line QLineEdit;
  replaced with an auto-expanding, Enter-to-send/Shift+Enter-newline input
  (presentation/folder/ai_file_editor_dialog.py)
- DF-011: run_command failed with WinError 267 for a project whose
  per-turn output directory had never been created
  (application/conversations/core_runtime_adapter.py)

DF-009 (AI-edit Apply/Discard buttons easy to miss) and DF-010 (AI reply
language - dev-confirmed not a bug) are intentionally NOT part of this
commit: DF-009 has no code fix yet (still "Assigned" in the sheet, only a
UX recommendation was recorded), DF-010 was rejected as expected behavior.

Tests: tests/test_cloud_workspace_sync.py, tests/test_ms365_cloud_dialogs.py,
tests/test_ai_file_editor_input.py, tests/test_monitoring_page_size.py (all
new, all passing). Full suite: 896 passed, 13 known-and-documented failures
unrelated to this change (an existing core/audit_log.py bug, this checkout
not being a git repo before now, and a repo/subprocess folder-naming
mismatch affecting ~66 characterization tests) - see the sheet's DF-006
Evidence column for details.

tests/test_ai_file_editor_input.py

@@ -0,0 +1,68 @@
+"""DF-008 — presentation/folder/ai_file_editor_dialog.py::_AutoExpandInput.
+
+The AI-edit instruction box was a fixed-height single-line QLineEdit (read as
+cramped); it is now a QPlainTextEdit that grows with content, submits on
+Enter, and inserts a newline on Shift+Enter — same convention as the Cowork
+composer's input (presentation/chat/chat_input_box.py::_Input)."""
+from __future__ import annotations
+
+import os
+
+os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")
+
+import pytest
+
+QApplication = pytest.importorskip("PySide6.QtWidgets").QApplication
+from PySide6.QtCore import Qt
+from PySide6.QtGui import QKeyEvent
+from PySide6.QtCore import QEvent
+
+from cowork_local.presentation.folder.ai_file_editor_dialog import _AutoExpandInput
+
+
+@pytest.fixture(scope="module")
+def qapp():
+    app = QApplication.instance() or QApplication([])
+    yield app
+
+
+def _press_enter(widget, shift: bool = False) -> None:
+    mods = Qt.ShiftModifier if shift else Qt.NoModifier
+    event = QKeyEvent(QEvent.KeyPress, Qt.Key_Return, mods)
+    widget.keyPressEvent(event)
+
+
+def test_starts_at_min_height(qapp) -> None:
+    box = _AutoExpandInput()
+    assert box.height() == _AutoExpandInput.MIN_HEIGHT
+
+
+def test_grows_with_multiline_content(qapp) -> None:
+    box = _AutoExpandInput()
+    start_height = box.height()
+    box.setPlainText("\n".join(f"line {i}" for i in range(10)))
+    assert box.height() > start_height
+    assert box.height() <= _AutoExpandInput.MAX_HEIGHT
+
+
+def test_enter_emits_submit_and_does_not_insert_newline(qapp) -> None:
+    box = _AutoExpandInput()
+    box.setPlainText("hello")
+    received = []
+    box.submit.connect(lambda: received.append(True))
+    _press_enter(box)
+    assert received == [True]
+    assert box.toPlainText() == "hello"   # Enter did not add a newline
+
+
+def test_shift_enter_inserts_newline_without_submitting(qapp) -> None:
+    box = _AutoExpandInput()
+    box.setPlainText("hello")
+    cursor = box.textCursor()
+    cursor.movePosition(cursor.MoveOperation.End)
+    box.setTextCursor(cursor)
+    received = []
+    box.submit.connect(lambda: received.append(True))
+    _press_enter(box, shift=True)
+    assert received == []
+    assert box.toPlainText() == "hello\n"

tests/test_cloud_workspace_sync.py

@@ -0,0 +1,132 @@
+"""DF-007 — core/cloud_workspace_sync.py: mirror a cloud folder to/from a
+local directory. All Graph calls are faked (monkeypatch on the ``graph``
+module the sync module imports) — no network."""
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+
+from cowork_local.core import cloud_workspace_sync as sync
+from cowork_local.core import ms365_graph as graph
+
+
+def _fake_tree():
+    """root/
+         a.txt
+         sub/
+           b.txt
+    """
+    files = {"a.txt": b"hello", "sub/b.txt": b"world"}
+    listing = {
+        "": [{"name": "a.txt"}, {"name": "sub", "folder": {}}],
+        "sub": [{"name": "b.txt"}],
+    }
+    return files, listing
+
+
+def test_download_folder_mirrors_tree(tmp_path: Path, monkeypatch) -> None:
+    files, listing = _fake_tree()
+
+    def fake_list_onedrive_files(token, path=""):
+        return listing.get(path, [])
+
+    def fake_download_bytes(token, path):
+        return files[path]
+
+    monkeypatch.setattr(graph, "list_onedrive_files", fake_list_onedrive_files)
+    monkeypatch.setattr(graph, "download_onedrive_file_bytes", fake_download_bytes)
+
+    local_dir = tmp_path / "mirror"
+    report = sync.download_folder("tok", {"provider": "onedrive", "remote_path": ""}, local_dir)
+
+    assert report.transferred == 2
+    assert report.errors == []
+    assert (local_dir / "a.txt").read_bytes() == b"hello"
+    assert (local_dir / "sub" / "b.txt").read_bytes() == b"world"
+
+
+def test_download_folder_collects_errors_without_raising(tmp_path: Path, monkeypatch) -> None:
+    def fake_list_onedrive_files(token, path=""):
+        raise graph.Ms365GraphError("boom")
+
+    monkeypatch.setattr(graph, "list_onedrive_files", fake_list_onedrive_files)
+
+    local_dir = tmp_path / "mirror"
+    report = sync.download_folder("tok", {"provider": "onedrive", "remote_path": ""}, local_dir)
+
+    assert report.transferred == 0
+    assert len(report.errors) == 1
+    assert "boom" in report.errors[0]
+
+
+def test_upload_folder_pushes_every_file(tmp_path: Path, monkeypatch) -> None:
+    local_dir = tmp_path / "mirror"
+    (local_dir / "sub").mkdir(parents=True)
+    (local_dir / "a.txt").write_bytes(b"hello")
+    (local_dir / "sub" / "b.txt").write_bytes(b"world")
+
+    uploaded = {}
+
+    def fake_upload_bytes(token, path, data):
+        uploaded[path] = data
+        return {}
+
+    monkeypatch.setattr(graph, "upload_onedrive_file_bytes", fake_upload_bytes)
+
+    report = sync.upload_folder("tok", {"provider": "onedrive", "remote_path": "work"}, local_dir)
+
+    assert report.transferred == 2
+    assert uploaded == {"work/a.txt": b"hello", "work/sub/b.txt": b"world"}
+
+
+def test_upload_folder_reports_files_over_the_simple_upload_limit(tmp_path: Path, monkeypatch) -> None:
+    local_dir = tmp_path / "mirror"
+    local_dir.mkdir()
+    (local_dir / "big.bin").write_bytes(b"x")
+
+    def fake_upload_bytes(token, path, data):
+        raise graph.Ms365GraphError("File too large for simple upload (huge > 4 bytes)")
+
+    monkeypatch.setattr(graph, "upload_onedrive_file_bytes", fake_upload_bytes)
+
+    report = sync.upload_folder("tok", {"provider": "onedrive", "remote_path": ""}, local_dir)
+
+    assert report.transferred == 0
+    assert report.skipped_too_large == ["big.bin"]
+    assert report.errors == []
+
+
+def test_upload_size_guard_rejects_before_any_request(monkeypatch) -> None:
+    huge = b"x" * (graph.MAX_SIMPLE_UPLOAD_BYTES + 1)
+
+    def fail_if_called(*a, **k):  # pragma: no cover - must not be reached
+        raise AssertionError("_request should not be called for an oversized upload")
+
+    monkeypatch.setattr(graph, "_request", fail_if_called)
+
+    with pytest.raises(graph.Ms365GraphError, match="too large"):
+        graph.upload_onedrive_file_bytes("tok", "a.bin", huge)
+
+
+def test_sharepoint_provider_uses_site_scoped_calls(tmp_path: Path, monkeypatch) -> None:
+    seen = {}
+
+    def fake_list_sharepoint_files(token, site_id, path=""):
+        seen["list_site_id"] = site_id
+        return [{"name": "a.txt"}] if path == "" else []
+
+    def fake_download_sharepoint_bytes(token, site_id, path):
+        seen["download_site_id"] = site_id
+        return b"hi"
+
+    monkeypatch.setattr(graph, "list_sharepoint_files", fake_list_sharepoint_files)
+    monkeypatch.setattr(graph, "download_sharepoint_file_bytes", fake_download_sharepoint_bytes)
+
+    local_dir = tmp_path / "mirror"
+    cloud_source = {"provider": "sharepoint", "site_id": "site-123", "remote_path": ""}
+    report = sync.download_folder("tok", cloud_source, local_dir)
+
+    assert report.transferred == 1
+    assert seen["list_site_id"] == "site-123"
+    assert seen["download_site_id"] == "site-123"

tests/test_monitoring_page_size.py

@@ -0,0 +1,70 @@
+"""DF-006 — the "Số dòng/trang" (rows per page) control: EventTable's
+page-size state (presentation/monitoring/shared/event_table.py) and its
+QComboBox wiring in build_filter_scaffold (.../shared/filter_scaffold.py).
+No dedicated test existed for this before — the design called for a
+user-visible/choosable item-per-page control, and this exercises it end to
+end (combo selection -> EventTable actually re-trimming its rows)."""
+from __future__ import annotations
+
+import os
+
+os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")
+
+import pytest
+
+QApplication = pytest.importorskip("PySide6.QtWidgets").QApplication
+QWidget = pytest.importorskip("PySide6.QtWidgets").QWidget
+
+from cowork_local.presentation.monitoring.shared.event_table import (
+    PAGE_SIZE_OPTIONS, EventTable,
+)
+from cowork_local.presentation.monitoring.shared.filter_scaffold import build_filter_scaffold
+
+
+@pytest.fixture(scope="module")
+def qapp():
+    app = QApplication.instance() or QApplication([])
+    yield app
+
+
+def _events(n: int):
+    return [{"ts": f"2026-09-0{i % 9 + 1}T00:00:0{i % 9}", "kind": "tool_call",
+              "name": f"e{i}", "ok": True, "detail": ""} for i in range(n)]
+
+
+def test_default_page_size_matches_old_max_rows(qapp) -> None:
+    table = EventTable()
+    assert table.page_size() == 300
+    table.set_events(_events(500))
+    assert table.rowCount() == 300
+
+
+def test_set_page_size_retrims_without_reloading(qapp) -> None:
+    table = EventTable()
+    table.set_events(_events(500))
+    table.set_page_size(50)
+    assert table.page_size() == 50
+    assert table.rowCount() == 50
+
+
+def test_page_size_combo_is_only_added_when_requested(qapp) -> None:
+    page = QWidget()
+    table = EventTable()
+    parts = build_filter_scaffold(page, table, on_refresh=lambda: None, with_page_size=False)
+    assert "page_size_combo" not in parts
+
+
+def test_page_size_combo_changes_the_table(qapp) -> None:
+    page = QWidget()
+    table = EventTable()
+    table.set_events(_events(500))
+    parts = build_filter_scaffold(page, table, on_refresh=lambda: None, with_page_size=True)
+    combo = parts["page_size_combo"]
+    assert combo.count() == len(PAGE_SIZE_OPTIONS)
+    assert combo.currentData() == 300   # matches EventTable's current page_size
+
+    idx = PAGE_SIZE_OPTIONS.index(50)
+    combo.setCurrentIndex(idx)
+
+    assert table.page_size() == 50
+    assert table.rowCount() == 50

tests/test_ms365_cloud_dialogs.py

@@ -0,0 +1,77 @@
+"""DF-007 — construction smoke tests for the two new MS365 cloud dialogs.
+Not a full characterization suite (see tests/test_monitoring_tab_container.py
+for the convention this follows) — just proves each dialog builds against a
+real AppConfig/AppContext without touching the network (Graph calls faked via
+monkeypatch)."""
+from __future__ import annotations
+
+import copy
+import os
+
+os.environ.setdefault("QT_QPA_PLATFORM", "offscreen")
+
+import pytest
+
+QApplication = pytest.importorskip("PySide6.QtWidgets").QApplication
+QDialog = pytest.importorskip("PySide6.QtWidgets").QDialog
+
+from cowork_local.config import AppConfig, DEFAULT_CONFIG
+from cowork_local.core import ms365_auth
+from cowork_local.core import ms365_graph as graph
+from cowork_local.ui.cloud_folder_picker_dialog import CloudFolderPickerDialog
+from cowork_local.ui.ms365_signin_dialog import Ms365SignInDialog, ensure_signed_in
+
+
+@pytest.fixture(scope="module")
+def qapp():
+    app = QApplication.instance() or QApplication([])
+    yield app
+
+
+@pytest.fixture()
+def config(tmp_path):
+    return AppConfig(data=copy.deepcopy(DEFAULT_CONFIG), path=tmp_path / "config.json")
+
+
+def test_signin_dialog_constructs(qapp, config) -> None:
+    dialog = Ms365SignInDialog(config)
+    assert dialog.windowTitle()
+
+
+def test_ensure_signed_in_short_circuits_when_already_signed_in(qapp, config, monkeypatch) -> None:
+    monkeypatch.setattr(ms365_auth, "is_signed_in", lambda cfg: True)
+    assert ensure_signed_in(None, config) is True
+
+
+def test_cloud_folder_picker_constructs_and_lists_onedrive_root(qapp, config, monkeypatch) -> None:
+    monkeypatch.setattr(ms365_auth, "get_access_token", lambda tenant_id, client_id: "fake-token")
+    monkeypatch.setattr(graph, "list_onedrive_files", lambda token, path="": [
+        {"name": "Documents", "folder": {}},
+        {"name": "readme.txt"},
+    ])
+
+    dialog = CloudFolderPickerDialog(config)
+
+    assert dialog._tree.topLevelItemCount() == 2
+    source = dialog.cloud_source()
+    assert source == {"provider": "onedrive", "site_id": "", "site_name": "", "remote_path": ""}
+
+
+def test_cloud_folder_picker_navigates_into_a_folder(qapp, config, monkeypatch) -> None:
+    monkeypatch.setattr(ms365_auth, "get_access_token", lambda tenant_id, client_id: "fake-token")
+
+    def fake_list(token, path=""):
+        if path == "":
+            return [{"name": "Documents", "folder": {}}]
+        if path == "Documents":
+            return [{"name": "report.docx"}]
+        return []
+
+    monkeypatch.setattr(graph, "list_onedrive_files", fake_list)
+
+    dialog = CloudFolderPickerDialog(config)
+    folder_item = dialog._tree.topLevelItem(0)
+    dialog._on_item_activated(folder_item, 0)
+
+    assert dialog._current_remote_path() == "Documents"
+    assert dialog.cloud_source()["remote_path"] == "Documents"