Xinmin Zeng b431053ef0
fix(frontend): stop rendering reasoning twice for reasoning+answer messages (#3870)
A reasoning+content AI message with no tool calls was grouped into both an
`assistant:processing` group (the ChainOfThought panel above the bubble) and an
`assistant` group (the bubble's own Reasoning collapsible), so its reasoning
rendered twice. Such a message now becomes only the assistant bubble; the
ChainOfThought panel keeps handling intermediate reasoning and tool steps.

Closes #3868
2026-07-01 23:35:48 +08:00
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