fix(harness): filter known storybook axe false positives

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

scripts/harness/run-storybook-a11y.mjs

@@ -34,7 +34,7 @@ const stories = [
     label: "Date picker playground",
     prepare: async (page) => {
       await page.getByRole("combobox", { name: "Launch date" }).click();
-      await page.getByRole("grid").waitFor({ state: "visible" });
+      await page.getByRole("dialog", { name: "Launch date calendar" }).waitFor({ state: "visible" });
     }
   },
   {
@@ -96,8 +96,8 @@ async function gotoStory(page, story) {
   await page.waitForLoadState("domcontentloaded");
   await page.waitForFunction(
     (storyId) => {
-      const title = document.title.toLowerCase();
-      const root = document.getElementById("storybook-root");
+      const title = globalThis.document.title.toLowerCase();
+      const root = globalThis.document.getElementById("storybook-root");
 
       return (
         title.includes(String(storyId).toLowerCase()) ||
@@ -125,12 +125,63 @@ function summarizeResults(results) {
   }));
 }
 
+function isKnownIncompleteFalsePositive(result, node) {
+  const failureSummary = node.failureSummary ?? "";
+
+  return (
+    (result.id === "aria-valid-attr-value" &&
+      failureSummary.includes(
+        "Unable to determine if aria-controls referenced ID exists on the page while using aria-haspopup"
+      )) ||
+    (result.id === "color-contrast" &&
+      (failureSummary.includes("Could not parse color string") ||
+        failureSummary.includes("Axe encountered an error; test the page for this type of problem manually")))
+  );
+}
+
+function summarizeIncompleteResults(results) {
+  return results
+    .map((result) => {
+      const nodes = result.nodes
+        .filter((node) => !isKnownIncompleteFalsePositive(result, node))
+        .map((node) => ({
+          failureSummary: node.failureSummary,
+          html: node.html,
+          target: node.target
+        }));
+
+      if (nodes.length === 0) {
+        return null;
+      }
+
+      return {
+        description: result.description,
+        help: result.help,
+        helpUrl: result.helpUrl,
+        id: result.id,
+        impact: result.impact,
+        nodeCount: nodes.length,
+        nodes
+      };
+    })
+    .filter(Boolean);
+}
+
 async function runAxe(page) {
   return page.evaluate(async () => {
-    const root = document.getElementById("storybook-root") ?? document.body;
-    return window.axe.run(root, {
-      resultTypes: ["violations", "incomplete"]
-    });
+    return globalThis.window.axe.run(
+      {
+        exclude: [
+          ["#storybook-root[aria-hidden='true']"],
+          ["#storybook-root[data-aria-hidden='true']"],
+          ["[data-radix-focus-guard]"]
+        ],
+        include: [["body"]]
+      },
+      {
+        resultTypes: ["violations", "incomplete"]
+      }
+    );
   });
 }
 
@@ -170,7 +221,7 @@ async function main() {
 
         const result = await runAxe(page);
         const violations = summarizeResults(result.violations);
-        const incomplete = summarizeResults(result.incomplete);
+        const incomplete = summarizeIncompleteResults(result.incomplete);
 
         report.violationCount += violations.length;
         report.incompleteCount += incomplete.length;