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/ui/table.go

@@ -14,17 +14,17 @@ type ForwardStatus struct {
 	Context    string
 	Namespace  string
 	Alias      string
-	Type       string // "service", "pod", etc.
-	Resource   string // name without type prefix
+	Type       string
+	Resource   string
+	Status     string
 	RemotePort int
 	LocalPort  int
-	Status     string // "Starting", "Active", "Reconnecting", "Error"
 }
 
 // TableUI manages the terminal table display
 type TableUI struct {
+	forwards map[string]*ForwardStatus
 	mu       sync.RWMutex
-	forwards map[string]*ForwardStatus // key is forward ID
 	verbose  bool
 }
 
@@ -101,12 +101,12 @@ func (t *TableUI) Render() {
 
 	// Sort forwards by local port for consistent display
 	type sortEntry struct {
-		id  string
 		fwd *ForwardStatus
+		id  string
 	}
 	var entries []sortEntry
 	for id, fwd := range t.forwards {
-		entries = append(entries, sortEntry{id, fwd})
+		entries = append(entries, sortEntry{fwd: fwd, id: id})
 	}
 
 	// Simple sort by local port