[Feature] View post interaction details across platforms

Summary

Add a unified way to inspect the details behind a post's interaction counts across supported platforms.

Flare can show interaction actions or counts, but in several places there is no way to open the corresponding users or posts. This makes it difficult to see who liked or reposted a post, which quote posts reference it, or which users added each emoji reaction.

Scope

• Likes and favorites: show the users who liked or favorited the post.
• Reposts and boosts: show the users who reposted or boosted the post.
• Quote posts: show the posts that quote the original post.
• Emoji reactions: show reaction types and the users behind each reaction.

Platform coverage

• X: repost users and quote posts.
• Bluesky: interaction users where the API exposes them.
• Mastodon and compatible Fediverse platforms: favorite and boost users.
• Misskey, Akkoma, and other reaction-capable platforms: emoji reaction details.

Platform-specific capabilities should only be shown when the corresponding API supports them.

UX

Interaction details should be reachable from the post detail screen, for example by tapping an interaction count or its associated action. Lists should support loading, empty, error, and pagination states where necessary.

Supersedes

This issue consolidates the following requests:

• #1217
• #2074
• #2200
• #2444

Start at the post detail screen and trace how interaction counts and platform-specific actions are currently exposed. Review the supported platform APIs to identify which users, quote posts, and reaction details are available. Done means supported details can be opened with loading, empty, error, and pagination states, while unsupported capabilities remain hidden.