feat(cli,parser): support custom profile names and overhaul WireGuard .conf parser for robustness

- CLI:
  - Add optional `[name]` argument to `wg-wrap profile import <path> [name]` to allow overriding the imported profile name. If not provided, it falls back to the derived filename.
  - Update `README.md` command documentation to reflect custom profile names and list the `wg-wrap profile stop <name>` subcommand.
  - Expand `internal/cli/profile_test.go` to cover derived vs custom-named profile imports.

- WG Configuration Parser:
  - Overhaul `pkg/wgconf/wgconf.go` to support case-insensitivity on section headers (e.g. `[peer]`, `[interface]`) and key names (e.g. `privatekey`, `allowedips`).
  - Implement robust trailing comment stripping (both `#` and `;`) while preserving inline comment-like characters in cryptographic keys (e.g. `key-with-hash-inside#123`) using whitespace-padded match logic.
  - Clean up and normalize leading/trailing spaces/tabs on parsed keys, values, and list elements (e.g. `AllowedIPs` and `DNS` fields).
  - Gracefully ignore unrecognized keys (e.g. `MTU`, `ListenPort`, `PresharedKey`) without returning errors.
  - Add comprehensive tests in `pkg/wgconf/wgconf_test.go` covering inline/block comments, formatting variations, unrecognized keys, and case-insensitivity.

2 files changed, 29 insertions, 7 deletions

diff --git a/internal/cli/cli.go b/internal/cli/cli.go
index 11914b1..af408c5 100644
--- a/internal/cli/cli.go
+++ b/internal/cli/cli.go
@@ -228,9 +228,13 @@ func (a *App) handleProfileCmd() error {
 		return a.handleProfileList()
 	case "import":
 		if len(a.Args) < 4 {
-			return fmt.Errorf("usage: wg-wrap profile import <path>")
+			return fmt.Errorf("usage: wg-wrap profile import <path> [name]")
 		}
-		return a.handleProfileImport(a.Args[3])
+		var name string
+		if len(a.Args) > 4 {
+			name = a.Args[4]
+		}
+		return a.handleProfileImport(a.Args[3], name)
 	case "configure":
 		if len(a.Args) < 4 {
 			return fmt.Errorf("usage: wg-wrap profile configure <name>")
@@ -307,7 +311,7 @@ func (a *App) handleProfileList() error {
 	return nil
 }
 
-func (a *App) handleProfileImport(srcPath string) error {
+func (a *App) handleProfileImport(srcPath string, name string) error {
 	profilesDir := a.getPathManager().ConfigDir()
 	if err := os.MkdirAll(profilesDir, 0755); err != nil {
 		return fmt.Errorf("failed to create profiles directory: %w", err)
@@ -317,10 +321,12 @@ func (a *App) handleProfileImport(srcPath string) error {
 		return fmt.Errorf("invalid WireGuard configuration at %s: %w", srcPath, err)
 	}
 
-	baseName := filepath.Base(srcPath)
-	name := strings.TrimSuffix(baseName, filepath.Ext(baseName))
 	if name == "" {
-		return fmt.Errorf("invalid source filename")
+		baseName := filepath.Base(srcPath)
+		name = strings.TrimSuffix(baseName, filepath.Ext(baseName))
+		if name == "" {
+			return fmt.Errorf("invalid source filename")
+		}
 	}
 
 	destPath := filepath.Join(profilesDir, name+".conf")
diff --git a/internal/cli/profile_test.go b/internal/cli/profile_test.go
index 17a5bc6..c9b1274 100644
--- a/internal/cli/profile_test.go
+++ b/internal/cli/profile_test.go
@@ -41,6 +41,7 @@ func TestProfileImport(t *testing.T) {
 		t.Fatalf("failed to create source conf: %v", err)
 	}
 
+	// 1. Test importing with derived name (no explicit name argument)
 	app := NewApp([]string{"wg-wrap", "profile", "import", srcFile})
 	app.ConfigDir = profilesDir
 
@@ -49,11 +50,26 @@ func TestProfileImport(t *testing.T) {
 		t.Errorf("expected no error, got %v", err)
 	}
 
-	// Verify the file was actually copied
+	// Verify the file was actually copied to derived name
 	destFile := filepath.Join(profilesDir, "source.conf")
 	if _, err := os.Stat(destFile); os.IsNotExist(err) {
 		t.Errorf("expected profile to be imported to %s", destFile)
 	}
+
+	// 2. Test importing with explicit name argument
+	customName := "custom-vpn"
+	appCustom := NewApp([]string{"wg-wrap", "profile", "import", srcFile, customName})
+	appCustom.ConfigDir = profilesDir
+
+	err = appCustom.Route()
+	if err != nil {
+		t.Errorf("expected no error for custom name import, got %v", err)
+	}
+
+	destCustomFile := filepath.Join(profilesDir, customName+".conf")
+	if _, err := os.Stat(destCustomFile); os.IsNotExist(err) {
+		t.Errorf("expected profile to be imported to %s", destCustomFile)
+	}
 }
 
 func TestProfileDelete(t *testing.T) {