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/httplog/proxy.go

@@ -15,20 +15,21 @@ import (
 	"time"
 
 	"github.com/nvm/kportal/internal/config"
+	"github.com/nvm/kportal/internal/logger"
 )
 
 // Proxy is an HTTP reverse proxy with logging capabilities
 type Proxy struct {
-	localPort    int // Port to listen on (user-facing)
-	targetPort   int // Port to forward to (k8s tunnel)
+	listener     net.Listener
 	logger       *Logger
 	server       *http.Server
 	forwardID    string
-	filterPath   string // Glob pattern for path filtering
-	includeHdrs  bool
-	listener     net.Listener
+	filterPath   string
+	localPort    int
+	targetPort   int
 	requestCount uint64
 	mu           sync.Mutex
+	includeHdrs  bool
 	running      bool
 }
 
@@ -100,7 +101,7 @@ func (p *Proxy) Start() error {
 	// Start serving (blocking)
 	go func() {
 		if err := p.server.Serve(ln); err != nil && err != http.ErrServerClosed {
-			// Log error but don't crash - proxy will be replaced on reconnect
+			logger.Debug("HTTP proxy serve error (will be replaced on reconnect)", map[string]any{"error": err.Error()})
 		}
 	}()