feat(types): add rig identity bead type (gt-zmznh)

- Add TypeRig constant to IssueType enum
- Update IsValid() method to include TypeRig
- Add UI color (orange) and style for rig type
- Update CLI flag descriptions in create and update commands
- Add Obsidian export tag for rig type
- Add comprehensive test cases for rig and other newer types

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/ui/styles.go

@@ -143,6 +143,10 @@ var (
 		Light: "#7fd962", // green - role definition
 		Dark:  "#7fd962",
 	}
+	ColorTypeRig = lipgloss.AdaptiveColor{
+		Light: "#e6a756", // orange - rig identity (project container)
+		Dark:  "#e6a756",
+	}
 
 	// === Issue ID Color ===
 	// IDs use standard text color - subtle, not attention-grabbing
@@ -192,6 +196,7 @@ var (
 	TypeChoreStyle   = lipgloss.NewStyle().Foreground(ColorTypeChore)
 	TypeAgentStyle   = lipgloss.NewStyle().Foreground(ColorTypeAgent)
 	TypeRoleStyle    = lipgloss.NewStyle().Foreground(ColorTypeRole)
+	TypeRigStyle     = lipgloss.NewStyle().Foreground(ColorTypeRig)
 )
 
 // CategoryStyle for section headers - bold with accent color
@@ -343,6 +348,8 @@ func RenderType(issueType string) string {
 		return TypeAgentStyle.Render(issueType)
 	case "role":
 		return TypeRoleStyle.Render(issueType)
+	case "rig":
+		return TypeRigStyle.Render(issueType)
 	default:
 		return issueType
 	}

internal/ui/styles_test.go

@@ -94,6 +94,7 @@ func TestRenderTypeVariants(t *testing.T) {
 		{"chore", TypeChoreStyle.Render("chore")},
 		{"agent", TypeAgentStyle.Render("agent")},
 		{"role", TypeRoleStyle.Render("role")},
+		{"rig", TypeRigStyle.Render("rig")},
 		{"custom", "custom"},
 	}
 	for _, tc := range cases {