RNv2: "More Unreads" button in sidebar - top/bottom depending on scroll position

描述

Please note that this work is expected on the gekidou branch for mobile app

When a user is in the sidebar, the more unreads button should be at the top or bottom of the screen depending on the scroll position.

Bottom position	Top position

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JIRA: https://mattermost.atlassian.net/browse/MM-42709

貢獻者指南

技術棧

typescriptreactreact native

領域

mobile

議題類型

feature

難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。

3

預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。

half day

活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。

blocked

清晰度議題是否清楚說明預期改動、驗收標準和下一步。

clear

前置要求

React Native basicsScroll event handlingMattermost mobile setup

新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。

30

研究方向

Examine the sidebar component in the gekidou branch of the mobile app. The 'More Unreads' button is likely implemented in a ChannelSidebar or similar component. Determine how to detect scroll position using React Native's ScrollView or FlatList's onScroll. Then toggle the button's absolute positioning between top and bottom. Check the JIRA ticket MM 42709 for any additional details. No linked PRs or comments indicate specific files.