Hyperscript: focus command, diagnostic test output, blur keyword

Parser/compiler/runtime for focus command. Tokenizer: focus, blur,
precedes, follows, ignoring, case keywords. Test spec: per-test
failure output for diagnosis.

374/831 (45%)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/playwright/hs-behavioral.spec.js

@@ -322,11 +322,16 @@ test.describe('Hyperscript behavioral tests', () => {
     for (const [e, info] of Object.entries(uniqueErrors).sort((a,b) => b[1].count - a[1].count).slice(0, 25)) {
       console.log(`    [${info.count}x] ${e}`);
     }
-    // Show samples of "bar" error specifically
-    const barSamples = results.filter(r => !r.p && (r.e||'').includes('Expected , got')).slice(0, 15);
-    if (barSamples.length > 0) {
-      console.log(`  Expected-got failures (${barSamples.length}):`);
-      for (const s of barSamples) console.log(`    ${s.s}/${s.n}`);
+    // Show ALL failing tests with errors (for diagnosis)
+    const failsByCategory = {};
+    for (const r of results.filter(r => !r.p)) {
+      if (!failsByCategory[r.s]) failsByCategory[r.s] = [];
+      failsByCategory[r.s].push(r);
+    }
+    for (const [cat, fails] of Object.entries(failsByCategory).sort((a,b) => a[0].localeCompare(b[0]))) {
+      for (const f of fails.slice(0, 5)) {
+        console.log(`  FAIL ${f.s}/${f.n}: ${(f.e||'').slice(0, 100)}`);
+      }
     }
 
     expect(results.length).toBeGreaterThanOrEqual(830);