refactor(ui): standardize on lipgloss semantic color system

Replace all fatih/color usages with internal/ui package that provides:
- Semantic color tokens (Pass, Warn, Fail, Accent, Muted)
- Adaptive light/dark mode support via Lipgloss AdaptiveColor
- Ayu theme colors for consistent, accessible output
- Tufte-inspired data-ink ratio principles

Files migrated: 35 command files in cmd/bd/

Add docs/ui-philosophy.md documenting:
- Semantic token usage guidelines
- Light/dark terminal optimization rationale
- Tufte and perceptual UI/UX theory application
- When to use (and not use) color in CLI output

cmd/bd/create_form.go

@@ -9,11 +9,11 @@ import (
 	"strings"
 
 	"github.com/charmbracelet/huh"
-	"github.com/fatih/color"
 	"github.com/spf13/cobra"
 	"github.com/steveyegge/beads/internal/rpc"
 	"github.com/steveyegge/beads/internal/storage"
 	"github.com/steveyegge/beads/internal/types"
+	"github.com/steveyegge/beads/internal/ui"
 )
 
 // createFormRawInput holds the raw string values from the form UI.
@@ -198,8 +198,9 @@ func CreateIssueFromFormValues(ctx context.Context, s storage.Storage, fv *creat
 }
 
 var createFormCmd = &cobra.Command{
-	Use:   "create-form",
-	Short: "Create a new issue using an interactive form",
+	Use:     "create-form",
+	GroupID: "issues",
+	Short:   "Create a new issue using an interactive form",
 	Long: `Create a new issue using an interactive terminal form.
 
 This command provides a user-friendly form interface for creating issues,
@@ -388,8 +389,7 @@ func runCreateForm(cmd *cobra.Command) {
 }
 
 func printCreatedIssue(issue *types.Issue) {
-	green := color.New(color.FgGreen).SprintFunc()
-	fmt.Printf("\n%s Created issue: %s\n", green("✓"), issue.ID)
+	fmt.Printf("\n%s Created issue: %s\n", ui.RenderPass("✓"), issue.ID)
 	fmt.Printf("  Title:    %s\n", issue.Title)
 	fmt.Printf("  Type:     %s\n", issue.IssueType)
 	fmt.Printf("  Priority: P%d\n", issue.Priority)