Huh forms need all message types (timers, resize, etc.) not just
KeyMsg to function. Restructured Update to delegate all messages to
huh when in form state. Fixed selected row style to be visually
distinct from header (white text on darker bg). Moved click zone
from narrow ID cell to wider Name cell for better click targets.
Split monolithic tui.go into per-tab view files. Added sparkline history
tracking, color-coded latency/uptime, rounded bordered tables, Dracula-themed
huh forms with conditional groups, BubbleZone mouse click support for tabs
and rows, and Harmonica spring-physics pulse indicator. Includes --demo flag
for seeding test data.