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.

security/command_risk_classifier.py

@@ -73,6 +73,38 @@ _MODERATE_PATTERNS = [
     r'\b(test|pytest|jest|mocha)\b',
 ]
 
+# Tools that reach the network over ICMP/raw sockets/direct DNS instead of an
+# HTTP(S) connection — none of them read HTTP_PROXY/HTTPS_PROXY, so
+# core/deps.py::network_blocked_env()'s proxy-env-var block (the only network
+# control this sandbox actually enforces) has no effect on them at all. Used
+# by command_bypasses_network_proxy() to deny these BY NAME when the user has
+# "Chặn mạng cho lệnh do agent chạy" on, since the proxy trick alone silently
+# lets them through (see DF-005 in Defect Management).
+_NETWORK_PROXY_BYPASS_PATTERNS = [
+    r'\bping\b', r'\btracert\b', r'\btraceroute\b', r'\bnslookup\b', r'\bdig\b',
+    r'\btelnet\b', r'\bftp\b', r'\bsftp\b', r'\bscp\b', r'\bssh\b',
+    r'\bnc\b', r'\bncat\b', r'\bnetcat\b', r'\barp\b',
+    r'\btest-netconnection\b', r'\btest-connection\b', r'\bresolve-dnsname\b',
+]
+
+
+def command_bypasses_network_proxy(command: str) -> Optional[str]:
+    """Tên công cụ mạng đầu tiên khớp trong ``command`` mà không tôn trọng
+    HTTP_PROXY/HTTPS_PROXY — None nếu không có công cụ nào như vậy.
+
+    ``network_blocked_env()`` chỉ set biến proxy, nên chỉ chặn được các công
+    cụ có ĐỌC biến đó (curl/pip/requests...). ``ping`` (ICMP), ``nslookup``
+    (DNS trực tiếp), ``ssh``/``ftp`` (TCP thô)... đều đi qua giao thức khác,
+    biến proxy không có tác dụng gì với chúng — phải chặn riêng theo tên lệnh
+    khi ``block_network`` đang bật.
+    """
+    cmd_lower = command.lower()
+    for pattern in _NETWORK_PROXY_BYPASS_PATTERNS:
+        m = re.search(pattern, cmd_lower, re.IGNORECASE)
+        if m:
+            return m.group()
+    return None
+
 
 def classify_command(command: str, is_cowork_mode: bool = True) -> RiskResult:
     """Chấm điểm rủi ro một lệnh shell.