fix(ci): stabilize cross-platform workflow checks

crates/aether-provider/transport/src/request_url/mod.rs

@@ -541,10 +541,11 @@ fn build_configured_claude_count_tokens_url(
         .map(str::trim)
         .filter(|value| !value.is_empty());
     let path = path?;
-    let path = path
-        .starts_with('/')
-        .then(|| path.to_string())
-        .unwrap_or_else(|| format!("/{path}"));
+    let path = if path.starts_with('/') {
+        path.to_string()
+    } else {
+        format!("/{path}")
+    };
     build_passthrough_path_url(
         &transport.endpoint.base_url,
         path.as_str(),

crates/aether-provider/transport/src/same_format_provider/mod.rs

@@ -1018,7 +1018,7 @@ mod tests {
                 .expect("headers should build")
             };
         assert!(
-            build_headers(compat_behavior, None).get("x-app").is_none(),
+            !build_headers(compat_behavior, None).contains_key("x-app"),
             "compatibility profile must not impersonate the Claude Code transport"
         );
         assert_eq!(
@@ -1029,12 +1029,11 @@ mod tests {
             "Claude Code transport headers must survive a transparent body profile"
         );
         assert!(
-            build_headers(
+            !build_headers(
                 native_behavior,
                 Some(aether_ai_formats::ApiOperation::ClaudeCountTokens),
             )
-            .get("anthropic-beta")
-            .is_none(),
+            .contains_key("anthropic-beta"),
             "native transparent token counting must not inject compatibility betas"
         );
         assert!(