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[Bug]: Android: scroll-to-bottom arrow is shown even when already scrolled to the very bottom

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  • #12860 来自 @macodev00 —— 已关闭,未合并

评估

难度
3/5
预计耗时
1-2 天
新手友好度
65/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
活跃
技术栈
typescript
领域
mobile

调研方向

Start in apps/mobile and trace the Android thread view's scroll-to-bottom arrow visibility behavior, including the streamed-output auto-scrolling path. Reproduce the issue with a thread at the latest message, then verify the arrow is hidden at the bottom and appears only after scrolling upward, including after returning to the bottom.

由索引模型根据 Issue 内容生成。

描述

accepted bug via-triage
Before submitting
  • I searched existing issues and did not find a duplicate.
  • I included enough detail to reproduce or investigate the problem.
Area

apps/mobile

Steps to reproduce
  1. Open a thread in the Android client.
  2. Scroll the chat all the way down, so the view is at the very bottom (latest message fully visible, no more content below).
  3. Observe the floating scroll-to-bottom arrow/pill.
Expected behavior

The scroll-to-bottom arrow should hide whenever the list is already scrolled fully to the bottom. It should only appear when the user has scrolled up away from the latest content, and disappear again as soon as they reach the bottom.

Actual behavior

The arrow is still shown even when the list is already scrolled as far down as possible. It sits over the newest messages and invites a tap that has nowhere to go. It also seems to reappear while streamed output is auto-scrolling, when the view is effectively pinned to the bottom.

Possibly related: #2119 (scroll-to-bottom pill visibility after navigating to a new thread), which suggests the pill's visibility logic has had tracking issues before.

Impact

Cosmetic issue

Environment
  • Device: Xiaomi 15 on HyperOS 4 beta 3 (CN ROM)
  • Platform: Android client (current build as of 2026-09-20)

🤖 GLM 5.3 Flash on behalf of iliasgws

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