feat: remove Enterprise badges, simplify Pro upgrade prompts

- Replace barrel import in AuditLogPanel.tsx to fix ad-blocker crash
- Remove all Enterprise/Pro badges from nav and feature headers
- Simplify upgrade CTAs to clean 'Upgrade to Pro' links
- Update docs: PULSE_PRO.md, API.md, README.md, SECURITY.md
- Align terminology: single Pro tier, no separate Enterprise tier

Also includes prior refactoring:
- Move auth package to pkg/auth for enterprise reuse
- Export server functions for testability
- Stabilize CLI tests

cmd/pulse/config.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/rcourtman/pulse-go-rewrite/internal/config"
+	"github.com/rcourtman/pulse-go-rewrite/pkg/server"
 	"github.com/spf13/cobra"
 	"golang.org/x/term"
 )
@@ -253,13 +254,13 @@ var configAutoImportCmd = &cobra.Command{
 				return fmt.Errorf("configuration response from URL was empty")
 			}
 
-			payload, err := normalizeImportPayload(body)
+			payload, err := server.NormalizeImportPayload(body)
 			if err != nil {
 				return err
 			}
 			encryptedData = payload
 		} else if configData != "" {
-			payload, err := normalizeImportPayload([]byte(configData))
+			payload, err := server.NormalizeImportPayload([]byte(configData))
 			if err != nil {
 				return err
 			}