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Author	SHA1	Message	Date
GaltRanch	915da7a1d5	Add shared/ui.py with status bar, spinner, error display, and input validation ... Foundation module for Level 1 frontend improvements: - status_bar(): persistent header showing mode, block height, BTC price - show_error/warning/success(): visible user-facing messages - Spinner: context manager for loading animations on API calls - prompt_menu(): input validation with back-button support - ANSI color constants for consistent styling Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>	2026-04-01 13:06:17 -03:00