Run gofmt over the seven files that had drifted

Formatting only: import order, and statements that were packed onto one
line split out. `git diff -w` shows nothing but that.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CGeSZxh1DCtRxmFVSYVGvJ

internal/router/dateparser_test.go

@@ -26,10 +26,10 @@ func TestPythonDateParser(t *testing.T) {
 	ctx := context.Background()
 
 	tests := []struct {
-		name     string
-		text     string
-		wantOK   bool
-		checkT   func(t *testing.T, got, now time.Time)
+		name   string
+		text   string
+		wantOK bool
+		checkT func(t *testing.T, got, now time.Time)
 	}{
 		{
 			name:   "ru relative — через час",