Display Future and Deferred Blocks

[jamespepper81]

Feature request: Enhanced visualization of future and deferred blocks

Improve the application's blockchain data display by adding support for visualizing:

• Future blocks: Clearly show which transactions are on track to be included in the next or upcoming blocks in the mempool, to help users anticipate confirmation times.
• Deferred blocks: Highlight transactions that have been pushed into later blocks, including those with lower fees or deprioritized due to mempool congestion.
• Confirmation delay analytics: Offer users a breakdown of why certain transactions are delayed, and statistics on expected confirmation times for pending transactions.
• User interface: Present this information in a dedicated section or via enhanced transaction details, with real-time updates as block construction progresses.

Benefits:

• Provides greater transparency into mempool dynamics and transaction prioritization.
• Empowers users to understand why their transactions may be delayed or deferred.
• Supports more effective fee estimation and wallet management strategies.

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Optional future enhancements:

• Integrate notifications (in-app or via Nostr) when transaction states change from future to deferred or are newly confirmed.
• Allow users to filter or search pending/future/deferred transactions by wallet address, fee, size, or time in mempool.