fix: Show all reactions of a message and keep their order stable

[Ivansss]

Fixes

• Reactions were clipped to the width the reused cell showed before, so a message
  could show only some of them — the rest were reachable by scrolling, with nothing
  indicating they were there.
• Reactions were sorted on top of an unordered dictionary, so the row came out in a
  different order on every launch and reactions moved even when their count hadn't
  changed. They now keep the order they were first used in, like the web client.

Additions

• The row fades out at the edge when there are more reactions than fit.
• Haptic feedback when tapping a reaction.

🤖 AI (if applicable)

• The content of this PR was partly or fully generated using AI