Release v1.3.9

ReadMe_EN.md

@@ -378,6 +378,34 @@ Valid     : 2026-02-01 to 2028-02-01
 
 ## Changelog
 
+### v1.3.9 (2026.9.2)
+
+**MCP Server Integration (AI Remote Management) & Remote Control / File Transfer Loop & Master Enhancements**
+
+**New features:**
+- **MCP server integration**: local JSON-RPC 2.0 endpoint on `127.0.0.1:6544` with Bearer token auth, configured via "Extensions > MCP Settings"; 23 tools spanning observe → execute → control → transfer, disabled by default with per-tier gates (read-only / whitelist / terminal / remote control / file transfer) and full audit logging
+- **MCP read-only observation tools**: search_hosts, get_host_detail, list_processes, list_windows, get_activity_history, list_files, get_screenshot (optional max_width), list_services, get_client_log, list_registry, get_audit_log; single-flight pending registry with 20s timeout, plus encoding fixes (clientType / clientID resolution)
+- **MCP remote terminal tools**: one-shot exec_command plus persistent terminal_open / terminal_exec / terminal_close (cwd and environment preserved, 300s idle sweep); sentinel detection and timeout_ms parsing fixes
+- **MCP remote control tools**: remote_open / remote_close sessions plus remote_keyboard (key_down / up / press / type), remote_mouse (move / click / drag / scroll), and remote_clipboard injection; two-way mutual exclusion with human Web viewing and a hardened busy/closed session state machine
+- **MCP file transfer tools**: download_file (V2 protocol + SHA-256 verification) and upload_file (main-connection upload); client-side lazy `InitFileUpload` in `COMMAND_SEND_FILE_V2` fixes truncated uploads
+- **Client activity history**: records active-window history (capped at 500 entries, skips <5s); new "Activity History" item under the host's Client Management menu with a Unicode edit control for correct UTF-8 title rendering
+- **Log context-menu trio**: right-click "Online Notify", "Ban IP", and "Unban IP" on the message log, with IPv4 extraction applied immediately
+- **Sort preference memory**: host list and process/window list sort preferences persisted (`list\*Sort` registry keys), restored on next launch
+
+**Improvements:**
+- Duplicate connections parked as standby and promoted after the old connection times out / disconnects, avoiding reconnect loops and false offline notifications
+- Remote desktop and virtual screen dialog titles show the host remark instead of the IP (falling back to IP)
+- Three-state host list sorting (ascending → descending → restore default, default rebuilt by online time)
+- Icons added to three online-host context menu items (bitmap array 63→66)
+
+**Bug fixes:**
+- Client screen-control batch misparse: record count that is a multiple of 7 was misclassified as MSG32, garbling injected input (`%48==0` checked first)
+- Heartbeat deferred-update use-after-free: IoRefCount held across PostMessage plus explicit memcpy truncation
+- ONLINELIST_PRIVILEGE enum shift corrupted the history host database (column moved to 16)
+- Remote desktop cursor cross-contamination across dialogs (routed via `OnSetCursor` per window)
+- Client log dialog stopped refreshing past the EDIT control limit (`SetLimitText(0)`)
+- Window manager view check reading stale state, process-list architecture column sort no-op, and FRP/NAT window-title mojibake
+
 ### v1.3.8 (2026.8.3)
 
 **SYSTEM-level Client & Master Usability Enhancements & Bug Fixes**