feat: add persistent proxy profile management

cmd/proxyctl/main_test.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestDefaultInvocationStartsTUIWithNoProfileState(t *testing.T) {
+	t.Setenv("XDG_CONFIG_HOME", t.TempDir())
+	var output bytes.Buffer
+	if err := run(nil, strings.NewReader("q"), &output); err != nil {
+		t.Fatalf("run proxyctl: %v", err)
+	}
+	if !strings.Contains(output.String(), "No Active Profile") {
+		t.Fatalf("default TUI output missing no-Profile state: %q", output.String())
+	}
+}
+
+func TestDefaultInvocationLoadsPersistedActiveProfile(t *testing.T) {
+	xdg := t.TempDir()
+	t.Setenv("XDG_CONFIG_HOME", xdg)
+	writeConfig(t, filepath.Join(xdg, "proxyctl", "profiles.json"), `{
+  "profiles": [{"name":"office","mode":"single","singleUrl":"http://proxy.example:8080","httpUrl":"http://proxy.example:8080","httpsUrl":"http://proxy.example:8080","allUrl":"http://proxy.example:8080"}],
+  "activeProfile": "office"
+}`)
+	var output bytes.Buffer
+	if err := run(nil, strings.NewReader("q"), &output); err != nil {
+		t.Fatalf("run proxyctl: %v", err)
+	}
+	if !strings.Contains(output.String(), "Active Profile: office") {
+		t.Fatalf("default TUI output missing Active Profile: %q", output.String())
+	}
+}
+
+func writeConfig(t *testing.T, path, contents string) {
+	t.Helper()
+	if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(path, []byte(contents), 0o600); err != nil {
+		t.Fatal(err)
+	}
+}