Found by the second PR review:
- After a streamed edit, an older render of the stream stored the edit's
original diagram again, and the next failed request (no quota, a lost
connection) put that old diagram back on the canvas. The tool handler
now marks its call as handled, so the preview code leaves it alone.
- An edit applied before the UI showed an earlier broken edit's error was
erased when that error undid its preview, or was built on that preview.
The handler now starts from the diagram before all unhandled previews,
and reads the diagram state that updates at once.
- A failed or stopped display_diagram left its half drawn diagram on the
canvas. Its preview is undone now, like an edit's.
- "New chat" cleared a chat that could not be saved (storage full).
- The settings dialog showed a model list, a fetch error or a test result
on the provider that was opened after the request started, and marked a
model id changed during the test as tested.
- A tool call with broken JSON was shown as cut off by the output limit.
- History entries and session thumbnails could pair with a later diagram
when draw.io answered an export late.
- A server model saved before non-ASCII provider names got into the id
was reset to the default model.
Found by the PR review:
- The built-in examples showed a finished card and an empty canvas. They
are answered in the browser, never reach the tool handler, and relied
on the final redraw that an earlier commit removed. The example branch
now loads its diagram itself.
- When the request failed while an edit was streaming (a provider error,
a lost connection), its preview stayed on the canvas. The error handler
now restores the diagram from before the preview.
- The model picker could not scroll with the wheel or touch: the settings
dialog blocks those events outside itself, and the picker is rendered
outside it. The popover is modal now.
- A fetch error and the open picker stayed when switching providers.
- Editing a model id kept the old test warning and response time, which
also hid the "may not be able to draw" hint for the new id.
The "Fetch models" button asks the provider for its models (OpenAI-style
/models, Anthropic, Google, Ollama, OpenRouter, Vercel Gateway, AIHubMix)
and shows them in a searchable picker. This replaces the route that only
worked for AIHubMix.
A snapshot of models.dev (MIT) says which models support tool calls.
Models without them get a "no tool calls" badge in the picker and a hint
in the model list, since drawing needs tool calls. Refresh the snapshot
with scripts/update-model-catalog.mjs.
dayuan.jiang