Merge pull request #73 from LazyBachelor/LPM-138

LPM-138 Refactor Tui with composable modals and use canvas

Refactors the TUI (dashboard + kanban) to use a shared, composable modal system with canvas-based overlay rendering, while consolidating styling into internal/style and expanding issue interactions (e.g., comments).

Changes:

Introduces a new pkg/tui/modal system (manager/stack + multiple modal types) and overlays modals using Lipgloss compositor layers.
Refactors dashboard/kanban views and input handling to use the modal manager + focus manager instead of per-modal boolean state.
Consolidates TUI styling by moving from pkg/tui/styles to internal/style and updates components to use the new style package; adds a shared footer renderer.

internal/utils/truncate/trunc.go

@@ -0,0 +1,43 @@
+package truncate
+
+import "charm.land/lipgloss/v2"
+
+// TruncateToWidth trims the given text so that its rendered width does not
+// exceed maxWidth. If truncation occurs and there is room, an ellipsis is
+// appended to indicate that the text was shortened.
+func TruncateToWidth(text string, maxWidth int) string {
+	if maxWidth <= 0 {
+		return ""
+	}
+
+	if lipgloss.Width(text) <= maxWidth {
+		return text
+	}
+
+	const ellipsis = "…"
+	ellipsisWidth := lipgloss.Width(ellipsis)
+
+	if ellipsisWidth > maxWidth {
+		runes := []rune(text)
+		if len(runes) > 0 {
+			firstChar := string(runes[0])
+			if lipgloss.Width(firstChar) <= maxWidth {
+				return firstChar
+			}
+		}
+		return ""
+	}
+
+	runes := []rune(text)
+	lastSafe := 0
+	for i := range runes {
+		candidate := string(runes[:i+1])
+		if lipgloss.Width(candidate)+ellipsisWidth > maxWidth {
+			break
+		}
+		lastSafe = i + 1
+	}
+
+	current := string(runes[:lastSafe])
+	return current + ellipsis
+}

internal/utils/user/user.go

@@ -0,0 +1,19 @@
+package user
+
+import (
+	"os"
+	"os/user"
+)
+
+func GetOsUsername() string {
+	if u, err := user.Current(); err == nil && u.Username != "" {
+		return u.Username
+	}
+	if s := os.Getenv("USER"); s != "" {
+		return s
+	}
+	if s := os.Getenv("USERNAME"); s != "" {
+		return s
+	}
+	return "user"
+}