fix: qrcode 补入 dependencies（0.1.0 遗留，templates qrcode 模板硬依赖）；requirements 冻结 mcp==1.29.0

Co-Authored-By: Claude <noreply@anthropic.com>

pyproject.toml

@@ -10,6 +10,8 @@ requires-python = ">=3.10"
 dependencies = [
     "bleak>=0.22",
     "pillow>=10",
+    # 纯 Python 离线库，不违反零网络不变量；templates.py qrcode 模板硬依赖
+    "qrcode>=7",
 ]
 
 [project.optional-dependencies]