refactor(tui): unicode symbols from a single definition

internal/tui/symbols.go

@@ -0,0 +1,37 @@
+package tui
+
+// unicode symbols used throughout the TUI
+const (
+	// indicators
+	SymbolSelected   = string('\u25B8') // black right-pointing small triangle
+	SymbolWatched    = string('\u2605') // black star
+	SymbolWarning    = string('\u26A0') // warning sign
+	SymbolSuccess    = string('\u2713') // check mark
+	SymbolError      = string('\u2717') // ballot x
+	SymbolBullet     = string('\u2022') // bullet
+	SymbolArrowRight = string('\u2192') // rightwards arrow
+	SymbolArrowLeft  = string('\u2190') // leftwards arrow
+	SymbolArrowUp    = string('\u2191') // upwards arrow
+	SymbolArrowDown  = string('\u2193') // downwards arrow
+	SymbolRefresh    = string('\u21BB') // clockwise open circle arrow
+	SymbolEllipsis   = string('\u2026') // horizontal ellipsis
+
+	// box drawing rounded 
+	BoxTopLeft     = string('\u256D') // light arc down and right
+	BoxTopRight    = string('\u256E') // light arc down and left
+	BoxBottomLeft  = string('\u2570') // light arc up and right
+	BoxBottomRight = string('\u256F') // light arc up and left
+	BoxHorizontal  = string('\u2500') // light horizontal
+	BoxVertical    = string('\u2502') // light vertical
+
+	// box drawing connectors
+	BoxTeeDown  = string('\u252C') // light down and horizontal
+	BoxTeeUp    = string('\u2534') // light up and horizontal
+	BoxTeeRight = string('\u251C') // light vertical and right
+	BoxTeeLeft  = string('\u2524') // light vertical and left
+	BoxCross    = string('\u253C') // light vertical and horizontal
+
+	// misc
+	SymbolDash = string('\u2013') // en dash
+)
+