diff --git a/.github/workflows/ci-go.yml b/.github/workflows/ci-go.yml
index 69c2507..b5fe097 100644
--- a/.github/workflows/ci-go.yml
+++ b/.github/workflows/ci-go.yml
@@ -84,7 +84,11 @@ jobs:
           done
 
           # Workflows must not invoke the Node toolchain (npm/npx/tsx/node).
-          if grep -rnE '(npm|npx|tsx|node) ' .github/workflows/*.yml; then
+          # Exception: app-build.yml drives the Tauri 2 webview UI (#181,
+          # FR-UI-01..09) — the Go single-implementation rule covers the
+          # DevAgent core; the app's UI stack is TS by the §20.4 decision.
+          if grep -rnE '(npm|npx|tsx|node) ' .github/workflows/*.yml \
+              | grep -v '^\.github/workflows/app-build\.yml:'; then
             fail "Node toolchain invocation found in .github/workflows — CI runs the Go suite only (issues #205, #250)"
           fi
 
diff --git a/internal/tui/polish_contract_test.go b/internal/tui/polish_contract_test.go
index 68fa3ae..519db0e 100644
--- a/internal/tui/polish_contract_test.go
+++ b/internal/tui/polish_contract_test.go
@@ -320,7 +320,7 @@ func TestLoopRunSigwinchRepaintsPromptly(t *testing.T) {
 
 	// Resize: narrower geometry, then fire SIGWINCH. drawLocked re-probes
 	// Size and full-clears (the sanctioned reflow clear).
-	env.bufEnv.cols = 60
+	env.cols = 60
 	env.winch <- os.Interrupt // any signal value wakes the repaint
 	runWaitFor(t, func() bool {
 		return strings.Contains(env.buf.String(), "\x1b[2J")