Start a new Thread by replying to a message in Timeline

[daniellekirkwood]

As a user I want to start a new Thread from a message in the Timeline.

Long press on message to open options > start Thread is an option >

• Design is here: https://www.figma.com/file/T309ztx0sNyOOK6NKVLHsK/Threads?node-id=1304%3A244131

Short press is not included in the MVP/P0 version of Threads.

Following matrix-org/matrix-spec-proposals#3440

• Add Reply In Thread option on long click
• Display threads in the appropriate thread timeline
• Send a regular message from threads
• Send a Reply message from threads
• Send a Quote message from threads
• Send an Edit event from within threads
• Indicate a message is a root thread (with a temp UI)
• Use relation type m.thread to start Threads
• Make sure that m.thread can be combined with m.in_reply_to to allow quote relies in threads

Added:

• When user clicks "Reply in Thread" the message bar gets the focus so user can type reply immediately without the need for extra click

[daniellekirkwood]

Needs-Product is a label on this issue because we need to reach a conclusion on the Short Press discussion.

[daniellekirkwood]

Removing the Needs-Product label as short press has been delayed to V2 of Threads and is not included in the MVP

[daniellekirkwood]

Removing Jano's assignment as Designs have been added to the issue

[janogarcia]

@ariskotsomitopoulos We need to make sure that when the "Reply in thread" action is used the message composer input gets the focus automatically in the thread view, without requiring the user to manually tap on it to actually initiate the reply.

https://www.figma.com/file/T309ztx0sNyOOK6NKVLHsK/Threads?node-id=1304%3A244131

@daniellekirkwood Could you please add it as a task/acceptance criteria to the issue description? Thanks!

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Edit: Just to be clear, that behavior should only happen when following the "Reply in thread" action. This doesn't apply when just viewing a thread after tapping on a thread summary or a thread tile in the thread list.