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

infra/docker/docker-compose.yml

@@ -19,6 +19,50 @@ services:
             timeout: 3s
             retries: 5
 
+    litellm-config-job:
+        build:
+            context: ../..
+            dockerfile: backend/Dockerfile
+        image: social-local-backend
+        container_name: social-local-litellm-config-job
+        restart: "no"
+        env_file:
+            - ../../.env
+        environment:
+            - PYTHONPATH=/app/backend/src
+        command: >
+            uv run python backend/scripts/build_litellm_proxy_config.py --output /config/litellm-proxy-config.yaml
+        volumes:
+            - litellm_config:/config
+        depends_on:
+            redis:
+                condition: service_healthy
+
+    litellm:
+        image: ghcr.io/berriai/litellm@sha256:b959a1816fa454a14d2842242d0fa1cd0d39f96fc94d3a1f4e1de4e48e2398c6
+        container_name: social-local-litellm
+        restart: unless-stopped
+        env_file:
+            - ../../.env
+        ports:
+            - "${SOCIAL_LITELLM__PORT:-3875}:${SOCIAL_LITELLM__PORT:-3875}"
+        volumes:
+            - litellm_config:/config:ro
+        command:
+            [
+                "--config",
+                "/config/litellm-proxy-config.yaml",
+                "--host",
+                "0.0.0.0",
+                "--port",
+                "${SOCIAL_LITELLM__PORT:-3875}",
+            ]
+        depends_on:
+            redis:
+                condition: service_healthy
+            litellm-config-job:
+                condition: service_completed_successfully
+
     init-job:
         build:
             context: ../..
@@ -47,3 +91,4 @@ services:
 
 volumes:
     redis_data:
+    litellm_config: