style: Extract UI constants and refactor main view rendering (#30)

- [x] Add golangci-lint configuration with gocritic ifElseChain disabled
- [x] Rename error variables to avoid shadowing (createErr, watcherErr, watchErr, etc.)
- [x] Replace `interface{}` with `any` type alias throughout codebase
- [x] Add package-level documentation comments to all internal packages
- [x] Reorder struct fields alphabetically for consistency
- [x] Extract UI constants (terminal dimensions, column widths, colors) to constants.go
- [x] Refactor BubbleTeaUI main view rendering into smaller helper functions
- [x] Simplify nested conditionals and improve code clarity
- [x] Add `isForwardDisabled()` helper method to BubbleTeaUI
- [x] Update file permissions from 0644 to 0600 in config tests
- [x] Add `#nosec` comments and error suppression where appropriate
- [x] Improve test table struct field ordering for readability
- [x] Fix resource parsing in AddForward using strings.SplitN
- [x] Add comprehensive tests for new UI helper functions and constants

internal/config/validator_test.go

@@ -11,10 +11,10 @@ func TestValidator_ValidateConfig(t *testing.T) {
 	validator := NewValidator()
 
 	tests := []struct {
-		name          string
 		config        *Config
-		expectErrors  bool
+		name          string
 		errorContains []string
+		expectErrors  bool
 	}{
 		{
 			name: "valid config",
@@ -227,9 +227,9 @@ func TestValidator_ValidateResourceFormat(t *testing.T) {
 
 	tests := []struct {
 		name          string
+		errorContains []string
 		forward       Forward
 		expectErrors  bool
-		errorContains []string
 	}{
 		{
 			name: "valid pod with name",
@@ -370,10 +370,10 @@ func TestValidator_CheckDuplicatePorts(t *testing.T) {
 	validator := NewValidator()
 
 	tests := []struct {
-		name          string
 		config        *Config
-		expectErrors  bool
+		name          string
 		errorContains []string
+		expectErrors  bool
 	}{
 		{
 			name: "no duplicate ports",
@@ -552,8 +552,8 @@ func TestFormatValidationErrors(t *testing.T) {
 	tests := []struct {
 		name           string
 		errors         []ValidationError
-		expectEmpty    bool
 		expectContains []string
+		expectEmpty    bool
 	}{
 		{
 			name:        "no errors",
@@ -625,10 +625,10 @@ func TestValidator_ValidateStructure(t *testing.T) {
 	validator := NewValidator()
 
 	tests := []struct {
-		name          string
 		config        *Config
-		expectErrors  bool
+		name          string
 		errorContains []string
+		expectErrors  bool
 	}{
 		{
 			name: "empty context name",
@@ -697,10 +697,10 @@ func TestValidator_ValidateMDNS(t *testing.T) {
 	validator := NewValidator()
 
 	tests := []struct {
-		name          string
 		config        *Config
-		expectErrors  bool
+		name          string
 		errorContains []string
+		expectErrors  bool
 	}{
 		{
 			name: "mDNS disabled - no validation",
@@ -968,8 +968,8 @@ func TestValidator_ValidateConfigWithOptions(t *testing.T) {
 	validator := NewValidator()
 
 	tests := []struct {
-		name         string
 		config       *Config
+		name         string
 		allowEmpty   bool
 		expectErrors bool
 	}{