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next-ai-draw-io/docs/cn/FAQ.md
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dayuan.jiang 23d5c83b0d feat(ui): canvas-first redesign with a self-hosted draw.io
The canvas now fills the window and the chat floats on its right. draw.io is
served from our own origin (public/drawio, downloaded at build time and
checked against the release's SHA-256), so the app can drive the editor
directly:

- every AI change becomes a version card with a thumbnail; compare, restore
  or undo it, and Ctrl+Z on the canvas takes an AI change back in one step
- shapes the AI just changed are highlighted on the canvas
- selected shapes appear as a chip and are sent to the model
- the app's own canvas toolbar, shape library and page tabs replace
  draw.io's chrome
- new start screen, session rename and switcher, open .drawio files
- settings split into Models & keys, Appearance, Advanced and About
- phones switch between canvas and chat
- dark mode keeps the diagram on a white sheet and no longer flashes

With an external draw.io (NEXT_PUBLIC_DRAWIO_BASE_URL) the app falls back to
draw.io's own toolbar and the features above that need same origin are off.

The chat logic moved from the 1500-line chat panel into a chat engine plus
small UI components; zustand holds canvas, versions, settings and UI state.
2026-10-06 16:17:11 +09:00

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# 常见问题解答 (FAQ)
---
## 1. 无法导出 PDF
**问题**: Web 版点击导出 PDF 后跳转到 `convert.diagrams.net/node/export` 然后无响应
**原因**: 嵌入式 Draw.io 不支持直接 PDF 导出,依赖外部转换服务,在 iframe 中无法正常工作
**解决方案**: 先导出为图片(PNG),再打印转成 PDF
**相关 Issue**: #539, #125
---
## 2. 无法访问 embed.diagrams.net(离线/内网部署)
**问题**: 内网环境提示"找不到 embed.diagrams.net 的服务器 IP 地址"
**关键点**: 应用现在自带一份 draw.io,从 `/drawio` 提供,浏览器不再需要访问 `embed.diagrams.net`。如果仍然看到这个错误,说明镜像是用 `NEXT_PUBLIC_DRAWIO_BASE_URL=https://embed.diagrams.net`(旧版 Dockerfile 的默认值)构建的,去掉这个构建参数重新构建即可。详见[离线部署](./offline-deployment.md)。
`NEXT_PUBLIC_*` 环境变量是**构建时**变量,会被打包到 JS 代码中,**运行时设置无效**!
**如果仍想使用单独的 draw.io 服务器**,在构建时通过 `args` 传入:
```yaml
# docker-compose.yml
services:
drawio:
image: jgraph/drawio:latest
ports: ["8080:8080"]
next-ai-draw-io:
build:
context: .
args:
- NEXT_PUBLIC_DRAWIO_BASE_URL=http://你的服务器IP:8080/
ports: ["3000:3000"]
env_file: .env
```
**内网用户**: 在外网修改 Dockerfile 并构建镜像,再传到内网使用
**相关 Issue**: #295, #317
---
## 3. 自建模型只思考不画图
**问题**: 本地部署的模型(如 Qwen、LiteLLM)只输出思考过程,不生成图表
**可能原因**:
1. **模型太小** - 小模型难以正确遵循 tool calling 指令,建议使用 32B+ 参数的模型
2. **未开启 tool calling** - 模型服务需要配置 tool use 功能
**解决方案**: 开启 tool calling,例如 vLLM:
```bash
python -m vllm.entrypoints.openai.api_server \
--model Qwen/Qwen3-32B \
--enable-auto-tool-choice \
--tool-call-parser hermes
```
**相关 Issue**: #269, #75
---
## 4. 上传图片后提示"未提供图片"
**问题**: 上传图片后,系统显示"未提供图片"错误
**可能原因**:
1. 模型不支持视觉功能(如 Kimi K2、DeepSeek、Qwen 文本模型)
**解决方案**:
- 使用支持视觉的模型:GPT-5.2、Claude 4.5 Sonnet、Gemini 3 Pro
- 模型名带 `vision` 或 `vl` 的支持图片
- 更新到最新版本(v0.4.9+)
**相关 Issue**: #324, #421, #469