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/k8s/discovery.go

@@ -28,11 +28,11 @@ func NewDiscovery(pool *ClientPool) *Discovery {
 
 // PodInfo contains information about a pod relevant for port forwarding.
 type PodInfo struct {
+	Created    metav1.Time
 	Name       string
 	Namespace  string
-	Containers []ContainerInfo
 	Status     string
-	Created    metav1.Time
+	Containers []ContainerInfo
 }
 
 // ContainerInfo contains information about a container within a pod.
@@ -44,17 +44,17 @@ type ContainerInfo struct {
 // PortInfo describes a port exposed by a container or service.
 type PortInfo struct {
 	Name       string
-	Port       int32
-	TargetPort int32 // For services: the actual pod port to forward to
 	Protocol   string
+	Port       int32
+	TargetPort int32
 }
 
 // ServiceInfo contains information about a service.
 type ServiceInfo struct {
 	Name      string
 	Namespace string
-	Ports     []PortInfo
 	Type      string
+	Ports     []PortInfo
 }
 
 // ListContexts returns all available Kubernetes contexts from kubeconfig.