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.

pkg/tui/components/footer.go

@@ -0,0 +1,48 @@
+package components
+
+import (
+	"charm.land/lipgloss/v2"
+	"github.com/LazyBachelor/LazyPM/internal/models"
+	"github.com/LazyBachelor/LazyPM/internal/style"
+	"github.com/LazyBachelor/LazyPM/internal/utils/truncate"
+)
+
+// RenderFooter renders the shared footer with the help bar and optional
+// validation feedback message.
+func RenderFooter(width int, helpBar *HelpBar, feedback models.ValidationFeedback) string {
+	feedbackStatus := feedback.Message
+
+	// Ensure the feedback message does not exceed the total available width.
+	if feedback.Message != "" {
+		// Allocate at least 30% of width for feedback, but not more than 60%
+		feedbackWidth := max(width*3/10, min(width/2, 50))
+		styledFeedback := style.ErrorStyle.Render(feedbackStatus + " [Press '?' for details]")
+		feedbackStatus = truncate.TruncateToWidth(styledFeedback, feedbackWidth)
+
+		if helpBar.IsExpanded() && feedbackStatus != "" {
+			for _, check := range feedback.Checks {
+				var prefix string
+				if check.Valid {
+					prefix = "✅ "
+				} else {
+					prefix = "❌ "
+				}
+
+				remainingWidth := max(width/2, 10)
+				styledCheckMsg := style.TextStyle.Render(check.Message)
+				truncatedMsg := truncate.TruncateToWidth(styledCheckMsg, remainingWidth)
+
+				feedbackStatus += "\n" + prefix + truncatedMsg
+			}
+		}
+	}
+
+	if feedbackStatus == "" {
+		return helpBar.View()
+	}
+
+	helpWidth := max(width-lipgloss.Width(feedbackStatus), 0)
+
+	helpBar.SetWidth(helpWidth)
+	return lipgloss.JoinHorizontal(lipgloss.Left, helpBar.View(), feedbackStatus)
+}