fix(lint): resolve pre-existing staticcheck findings

Unrelated to the zsh fix, but blocking this PR's CI: golangci-lint-action
floats to the latest release, whose newer staticcheck catches issues that
predate this PR and reproduce identically on main.

- client_default.go: replace the deprecated http.Transport.Dial with
  DialContext (SA1019)
- get.go: the unix build of GetAccentColor always errors, so the success
  path is statically unreachable there (SA4023), even though the
  darwin/windows implementations can succeed. An inline //nolint would
  be flagged as unused by nolintlint on those platforms' builds, so
  exclude SA4023 for this file via .golangci.yml instead - verified
  clean under GOOS=linux, GOOS=darwin, and GOOS=windows.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SAb3Bs4xBBQhweDvCh59b7

Author: claude

src/.golangci.yml

@@ -57,6 +57,16 @@ linters:
       - third_party$
       - builtin$
       - examples$
+    rules:
+      # GetAccentColor's unix stub (colors_unix.go) always errors, so staticcheck
+      # sees the success path here as statically unreachable when analyzed under
+      # a unix GOOS - even though the darwin/windows implementations can succeed.
+      # An inline //nolint would be flagged as unused (nolintlint) on those
+      # platforms' builds, so exclude by config instead.
+      - path: cli/get.go
+        linters:
+          - staticcheck
+        text: SA4023
 formatters:
   enable:
     - gofmt

src/runtime/http/client_default.go

@@ -11,9 +11,9 @@ import (
 
 var defaultTransport http.RoundTripper = &http.Transport{
 	Proxy: http.ProxyFromEnvironment,
-	Dial: (&net.Dialer{
+	DialContext: (&net.Dialer{
 		Timeout: 10 * time.Second,
-	}).Dial,
+	}).DialContext,
 	TLSHandshakeTimeout:   10 * time.Second,
 	ResponseHeaderTimeout: 10 * time.Second,
 }