refactor: 重构 Tool Result 契约，移除 ui_hints 统一使用 result 字段

- ToolAgentOutput 移除 result_summary 和 ui_hints，统一使用 result 字段
- 日历/用户查找工具移除 ui_hints 输出，改为机器可读的结构化结果
- Agent History 移除 tool 消息的 ui_hints 处理逻辑
- App 版本检查改为 manifest.json 方式，支持多渠道发布
- 更新 settings 配置和测试用例适配新结构

pyproject.toml

@@ -7,13 +7,9 @@ dependencies = [
     "ag-ui-protocol>=0.1.13",
     "alembic>=1.18.3",
     "asyncpg>=0.31.0",
-    "basedpyright>=1.37.2",
-    "crewai>=1.6.1",
-    "crewai-tools>=1.6.1",
     "email-validator>=2.3.0",
     "fastapi>=0.128.0",
-    "litellm[proxy]>=1.52.0",
-    "playwright>=1.57.0",
+    "litellm>=1.52.0",
     "pydantic>=2.11.0",
     "pydantic-settings>=2.10.0",
     "pyjwt>=2.10.1",
@@ -53,6 +49,8 @@ markers = [
 [dependency-groups]
 dev = [
     "aiosqlite>=0.22.1",
+    "basedpyright>=1.37.2",
+    "playwright>=1.57.0",
     "pre-commit>=4.5.1",
     "pytest>=9.0.2",
     "pytest-asyncio>=1.3.0",