Polish Bitfeed visualization and interaction UI

[kakulukia]

Summary
This PR adds a set of UI and visualization improvements to Bitfeed:

• Adds keyboard navigation between blocks with left/right arrow keys.
• Replay button (mainly for testing, but i kept it visible just for fun)
• Fresh-block aura animation added.
• Adds an optional background Bitcoin price chart with 1D/30D modes.
• Improves transaction search/watchlist interactions with clearer bookmark states and highlighted tooltips.
• Adds a transaction hover lens effect
• Refines mempool visualization with a more ambient animated divider/tide effect.
• Alignment for various items fixed
• Adds fullscreen/ambient behavior polish, including sidebar hiding
• Added a ghost trail effekt to new mempool tansaktions
• Memepool TXs spawn randomly across the screen