Add configuration wizard. (#2)

* Add configuration wizard.

internal/ui/wizard_styles.go

@@ -0,0 +1,211 @@
+package ui
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/charmbracelet/lipgloss"
+)
+
+// Color palette for wizards
+var (
+	primaryColor   = lipgloss.Color("205") // Pink/Magenta
+	successColor   = lipgloss.Color("42")  // Green
+	errorColor     = lipgloss.Color("196") // Red
+	warningColor   = lipgloss.Color("220") // Yellow
+	mutedColor     = lipgloss.Color("241") // Gray
+	accentColor    = lipgloss.Color("63")  // Purple
+	highlightColor = lipgloss.Color("117") // Light blue
+)
+
+// Text styles
+var (
+	wizardHeaderStyle = lipgloss.NewStyle().
+				Bold(true).
+				Foreground(primaryColor).
+				MarginBottom(0)
+
+	wizardStepStyle = lipgloss.NewStyle().
+			Foreground(mutedColor).
+			Italic(true)
+
+	breadcrumbStyle = lipgloss.NewStyle().
+			Foreground(highlightColor).
+			Bold(true)
+
+	selectedStyle = lipgloss.NewStyle().
+			Foreground(primaryColor).
+			Bold(true)
+
+	successStyle = lipgloss.NewStyle().
+			Foreground(successColor).
+			Bold(true)
+
+	errorStyle = lipgloss.NewStyle().
+			Foreground(errorColor).
+			Bold(true)
+
+	warningStyle = lipgloss.NewStyle().
+			Foreground(warningColor).
+			Bold(true)
+
+	mutedStyle = lipgloss.NewStyle().
+			Foreground(mutedColor)
+
+	helpStyle = lipgloss.NewStyle().
+			Foreground(mutedColor).
+			Italic(true)
+
+	spinnerStyle = lipgloss.NewStyle().
+			Foreground(accentColor).
+			Bold(true)
+)
+
+// Input styles
+var (
+	inputStyle = lipgloss.NewStyle().
+			Foreground(lipgloss.Color("252"))
+
+	validInputStyle = lipgloss.NewStyle().
+			Foreground(successColor)
+)
+
+// Checkbox styles
+var (
+	checkedBoxStyle = lipgloss.NewStyle().
+			Foreground(successColor).
+			Bold(true)
+
+	uncheckedBoxStyle = lipgloss.NewStyle().
+				Foreground(mutedColor)
+)
+
+// Container styles
+var (
+	wizardBoxStyle = lipgloss.NewStyle().
+		Border(lipgloss.RoundedBorder()).
+		BorderForeground(accentColor).
+		Padding(1, 2).
+		Width(60)
+)
+
+// Helper functions for rendering
+
+// renderProgress returns a step indicator like "Step 2/7"
+func renderProgress(current, total int) string {
+	return wizardStepStyle.Render(fmt.Sprintf("Step %d/%d", current, total))
+}
+
+// renderHeader returns a formatted header with title and progress
+func renderHeader(title, progress string) string {
+	header := wizardHeaderStyle.Render(title)
+	if progress != "" {
+		header += "  " + progress
+	}
+	return header + "\n\n"
+}
+
+// renderBreadcrumb returns a formatted breadcrumb path
+func renderBreadcrumb(parts ...string) string {
+	return breadcrumbStyle.Render(strings.Join(parts, " / "))
+}
+
+// renderList renders a list of items with cursor selection and viewport scrolling
+func renderList(items []string, cursor int, prefix string, scrollOffset int) string {
+	var b strings.Builder
+
+	const viewportHeight = 20
+	totalItems := len(items)
+
+	// Show scroll up indicator if there are items above the viewport
+	if scrollOffset > 0 {
+		b.WriteString(mutedStyle.Render("        ↑ More above ↑") + "\n")
+	}
+
+	// Calculate visible range
+	start := scrollOffset
+	end := scrollOffset + viewportHeight
+	if end > totalItems {
+		end = totalItems
+	}
+
+	// Render visible items
+	for i := start; i < end; i++ {
+		cursorPrefix := prefix
+		if i == cursor {
+			cursorPrefix = "▸ "
+			b.WriteString(selectedStyle.Render(cursorPrefix + items[i]))
+		} else {
+			b.WriteString(cursorPrefix + items[i])
+		}
+		b.WriteString("\n")
+	}
+
+	// Show scroll down indicator if there are items below the viewport
+	if end < totalItems {
+		b.WriteString(mutedStyle.Render("        ↓ More below ↓") + "\n")
+	}
+
+	return b.String()
+}
+
+// renderTextInput renders a text input field with a cursor
+func renderTextInput(label, value string, valid bool) string {
+	var b strings.Builder
+
+	b.WriteString(label)
+
+	inputText := value + "█"
+	if valid {
+		b.WriteString(validInputStyle.Render(inputText))
+	} else {
+		b.WriteString(inputStyle.Render(inputText))
+	}
+
+	return b.String()
+}
+
+// overlayContent overlays modal content centered on the base view
+func overlayContent(base, modal string, termWidth, termHeight int) string {
+	baseLines := strings.Split(base, "\n")
+	modalLines := strings.Split(modal, "\n")
+
+	// Ensure base has enough lines
+	for len(baseLines) < termHeight {
+		baseLines = append(baseLines, "")
+	}
+
+	modalHeight := len(modalLines)
+	modalWidth := 0
+	for _, line := range modalLines {
+		w := lipgloss.Width(line)
+		if w > modalWidth {
+			modalWidth = w
+		}
+	}
+
+	// Calculate center position
+	startRow := (termHeight - modalHeight) / 2
+	if startRow < 0 {
+		startRow = 0
+	}
+
+	// Create result with modal overlaid
+	result := make([]string, len(baseLines))
+	copy(result, baseLines)
+
+	for i, modalLine := range modalLines {
+		row := startRow + i
+		if row >= 0 && row < len(result) {
+			// Center the modal line
+			padding := (termWidth - lipgloss.Width(modalLine)) / 2
+			if padding < 0 {
+				padding = 0
+			}
+
+			result[row] = strings.Repeat(" ", padding) + modalLine
+		}
+	}
+
+	return strings.Join(result, "\n")
+}