修复：消除 QProcess 重载歧义并归档串流故障验证

变更详情：QProcess::finished 重载消歧；文档：串流失败根因（双 IP ARP 混乱）与延迟 A/B 结论

- moonlight_session.cpp：QOverload 显式指定 finished 重载，修复 ARM64 编译
- moonlight.conf：vsync/frame-pacing 默认改回开启（A/B 实测关闭无改善）
- docs：补充 10-29 登录流程验收、重启验收、Monitor 恢复、双 IP 根因与 A/B 数据
- tools：新增 deploy_kiosk.sh 一键部署脚本与语法自检

tools/syntax_sanity.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python3
+"""Rough brace/paren balance sanity check for edited C++ files."""
+import os
+import re
+import sys
+
+os.chdir(os.path.join(os.path.dirname(os.path.abspath(__file__)),
+                      "..", "terminal", "kiosk-shell"))
+
+FILES = [
+    "src/main_window.cpp",
+    "src/main_window.h",
+    "src/desktop_list_page.cpp",
+    "src/desktop_list_page.h",
+    "src/desktop_service.cpp",
+    "src/desktop_service.h",
+    "src/desktop_session.h",
+    "src/moonlight_session.cpp",
+    "src/moonlight_session.h",
+    "src/login_page.cpp",
+    "src/login_page.h",
+    "src/state_machine.cpp",
+    "src/state_machine.h",
+]
+
+fail = False
+for f in FILES:
+    src = open(f, encoding="utf-8").read()
+    src2 = re.sub(r"//[^\n]*", "", src)
+    src2 = re.sub(r'"(?:\\.|[^"\\])*"', '""', src2)
+    src2 = re.sub(r"'(?:\\.|[^'\\])*'", "''", src2)
+    counts = {c: src2.count(c) for c in "{}()"}
+    ok = counts["{"] == counts["}"] and counts["("] == counts[")"]
+    print(f, counts, "OK" if ok else "MISMATCH")
+    if not ok:
+        fail = True
+
+sys.exit(1 if fail else 0)