docs: document LOG_LEVEL configuration and production defaults

Update all documentation to reflect new global LOG_LEVEL environment variable.

- Add LOG_LEVEL to configuration reference tables

- Update deployment guides with LOG_LEVEL=error examples

- Clarify dev (info) vs production (error) log level recommendations

- Add LOG_LEVEL to all .env examples and quick start guides

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

README.md

@@ -63,6 +63,7 @@ bun run bootstrap
 PORT=5174
 ENCRYPTION_KEY=   # required, 64 hex chars (openssl rand -hex 32)
 # DATABASE_PATH=./data/assistant.db
+# LOG_LEVEL=info   # dev default; use LOG_LEVEL=error in production
 ```
 
 > `ENCRYPTION_KEY` is mandatory. The app refuses to start without it.

docs/configuration.md

@@ -14,6 +14,7 @@ This project uses a DB-first runtime configuration model:
 | `ENCRYPTION_KEY` | Yes | AES-256-GCM master key (64 hex chars) for API key encryption | - |
 | `PORT` | No | Service port | `5174` |
 | `DATABASE_PATH` | No | SQLite path | `./data/assistant.db` |
+| `LOG_LEVEL` | No | Backend log level (`debug`/`info`/`warn`/`error`). Default is `info`; use `error` in production. | `info` |
 
 Generate key:
 

docs/configuration.zh-CN.md

@@ -14,6 +14,7 @@
 | `ENCRYPTION_KEY` | 是 | API Key 加密主密钥（AES-256-GCM，64 位十六进制） | - |
 | `PORT` | 否 | 服务端口 | `5174` |
 | `DATABASE_PATH` | 否 | SQLite 路径 | `./data/assistant.db` |
+| `LOG_LEVEL` | 否 | 后端日志级别（`debug`/`info`/`warn`/`error`）。默认 `info`；生产环境建议 `error`。 | `info` |
 
 生成密钥：
 

docs/deployment.md

@@ -4,7 +4,7 @@
 
 ```bash
 docker build -t gitea-assistant .
-docker run -d -p 5174:5174 -v ./data:/app/data -e PORT=5174 gitea-assistant
+docker run -d -p 5174:5174 -v ./data:/app/data -e PORT=5174 -e LOG_LEVEL=error gitea-assistant
 ```
 
 ## Docker Compose
@@ -18,11 +18,14 @@ docker compose up -d
 - `gitea-assistant`
 - `qdrant`
 
+Production default in compose sets `LOG_LEVEL=error`.
+
 If you do not use memory features, Qdrant can be optional in custom compose setups.
 
 ## Kubernetes
 
 Kubernetes manifests are in `k8s/`.
+The default ConfigMap sets `LOG_LEVEL=error` for production.
 
 ### 1) Create namespace and encryption secret
 

docs/deployment.zh-CN.md

@@ -4,7 +4,7 @@
 
 ```bash
 docker build -t gitea-assistant .
-docker run -d -p 5174:5174 -v ./data:/app/data -e PORT=5174 gitea-assistant
+docker run -d -p 5174:5174 -v ./data:/app/data -e PORT=5174 -e LOG_LEVEL=error gitea-assistant
 ```
 
 ## Docker Compose
@@ -18,11 +18,14 @@ docker compose up -d
 - `gitea-assistant`
 - `qdrant`
 
+Compose 生产默认日志级别已设置为 `LOG_LEVEL=error`。
+
 如果不使用记忆能力，可在自定义编排中将 Qdrant 设为可选。
 
 ## Kubernetes
 
 Kubernetes 清单位于 `k8s/` 目录。
+默认 ConfigMap 已将生产日志级别设置为 `LOG_LEVEL=error`。
 
 ### 1) 创建命名空间与加密密钥
 

docs/getting-started.md

@@ -30,6 +30,7 @@ Create `.env`:
 PORT=5174
 ENCRYPTION_KEY= # required, generate with: openssl rand -hex 32
 # DATABASE_PATH=./data/assistant.db
+# LOG_LEVEL=info   # local dev default; use LOG_LEVEL=error in production
 ```
 
 > `ENCRYPTION_KEY` is required. Application startup fails when it is missing.

docs/getting-started.zh-CN.md

@@ -30,6 +30,7 @@ bun run bootstrap
 PORT=5174
 ENCRYPTION_KEY= # 必填，使用 openssl rand -hex 32 生成
 # DATABASE_PATH=./data/assistant.db
+# LOG_LEVEL=info   # 本地开发默认；生产环境请使用 LOG_LEVEL=error
 ```
 
 > `ENCRYPTION_KEY` 为必填项，缺失时服务会拒绝启动。