feat(blog): / focuses search, Esc clears and blurs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/molecules/BlogSearch.astro

@@ -140,5 +140,30 @@
     }
 
     input.addEventListener("input", applyFilter);
+
+    // `/` from anywhere on the page focuses the search input — unless the user
+    // is already typing somewhere editable (text input, textarea, or any
+    // contenteditable element). `Esc` while the input is focused clears the
+    // query, blurs, and restores the full archive.
+    document.addEventListener("keydown", (event) => {
+      if (event.key === "/" && !event.metaKey && !event.ctrlKey && !event.altKey) {
+        const target = event.target as HTMLElement | null;
+        const tag = target?.tagName;
+        const editable =
+          tag === "INPUT" ||
+          tag === "TEXTAREA" ||
+          target?.isContentEditable === true;
+        if (!editable) {
+          event.preventDefault();
+          input!.focus();
+        }
+      } else if (event.key === "Escape" && document.activeElement === input) {
+        if (input!.value !== "") {
+          input!.value = "";
+          applyFilter();
+        }
+        input!.blur();
+      }
+    });
   }
 </script>