• Add hardcoded assume-utreexo checkpoint to speed up initial setup.
• Display header sync percentage and floor sub-100% sync values to 2 decimals for clearer progress feedback.
• Detect stalled nodes and warn the user when sync is not progressing.
• Hide the Share Validation card until sync actually reaches the tip.
• Improve screen recomposition performance on the Node screen.
• Remove non-functional memory info display.
• Update the underlying Floresta node: faster header IBD, ChainSelector competing-tip fix, LookingForForks watchdog, and assume-utreexo IBD-flag fix.