feat: Add UI context helper with colorizer, icons, API client, and styled output methods

- Add uiContext struct bundling colorizer, icons, client, config, and connected state
- Add newUIContext to initialize context from CLIConfig and probe API connectivity
- Add styled output methods: header, info, success, warn, errorln, muted
- Add connectivityBanner to display warning when API server is unreachable
- Add endpointDisplay to format API endpoint for display
- Add newTable convenience method to create configured UI table
- Add statusStyle to map status strings to semantic styles (success, warning, error,

apps/cli/internal/commands/helpers.go

@@ -0,0 +1,95 @@
+package commands
+
+import (
+	"fmt"
+
+	"github.com/nutcas3/telecom-platform/apps/cli/internal/api"
+	"github.com/nutcas3/telecom-platform/apps/cli/internal/types"
+	"github.com/nutcas3/telecom-platform/apps/cli/internal/ui"
+)
+
+// uiContext bundles the common UI primitives used across commands.
+type uiContext struct {
+	colorizer *ui.Colorizer
+	icons     *ui.IconRenderer
+	client    *api.Client
+	config    *types.CLIConfig
+	connected bool
+}
+
+// newUIContext builds a uiContext from a CLIConfig, probing API connectivity.
+func newUIContext(cfg *types.CLIConfig) *uiContext {
+	useColor := cfg == nil || !cfg.NoColor
+	client := api.NewClient(cfg)
+	return &uiContext{
+		colorizer: ui.NewColorizer(useColor),
+		icons:     ui.NewIconRenderer(true, false),
+		client:    client,
+		config:    cfg,
+		connected: client.IsConnected(),
+	}
+}
+
+// header prints a styled section header.
+func (u *uiContext) header(title string) {
+	fmt.Println(u.colorizer.Colorize(title, ui.StyleHeader))
+}
+
+// info prints a styled informational line.
+func (u *uiContext) info(msg string) {
+	fmt.Println(u.colorizer.Colorize(msg, ui.StyleInfo))
+}
+
+// success prints a styled success line.
+func (u *uiContext) success(msg string) {
+	fmt.Println(u.colorizer.Colorize(msg, ui.StyleSuccess))
+}
+
+// warn prints a styled warning line.
+func (u *uiContext) warn(msg string) {
+	fmt.Println(u.colorizer.Colorize(msg, ui.StyleWarning))
+}
+
+// error prints a styled error line.
+func (u *uiContext) errorln(msg string) {
+	fmt.Println(u.colorizer.Colorize(msg, ui.StyleError))
+}
+
+// muted prints a styled muted line.
+func (u *uiContext) muted(msg string) {
+	fmt.Println(u.colorizer.Colorize(msg, ui.StyleMuted))
+}
+
+// connectivityBanner prints a warning banner if the API is unreachable.
+func (u *uiContext) connectivityBanner() {
+	if !u.connected {
+		u.warn("Warning: API server unreachable at " + u.endpointDisplay() + " - showing placeholder data")
+		fmt.Println()
+	}
+}
+
+func (u *uiContext) endpointDisplay() string {
+	if u.config == nil || u.config.APIEndpoint == "" {
+		return "(no endpoint)"
+	}
+	return u.config.APIEndpoint
+}
+
+// newTable returns a freshly configured UI table.
+func (u *uiContext) newTable() *ui.Table {
+	return ui.NewTable(u.colorizer, u.icons)
+}
+
+// statusStyle maps a status string to a ui.Style.
+func statusStyle(status string) ui.Style {
+	switch status {
+	case "PAID", "SUCCESS", "COMPLETED", "HEALTHY", "ACTIVE", "RUNNING", "OK":
+		return ui.StyleSuccess
+	case "PENDING", "PROCESSING", "BUILDING", "WARNING", "WARN":
+		return ui.StyleWarning
+	case "FAILED", "CANCELLED", "OVERDUE", "INACTIVE", "STOPPED", "ERROR", "CRITICAL":
+		return ui.StyleError
+	default:
+		return ui.StyleMuted
+	}
+}