fix: code review round 2 - logging, cleanup, TOC, simplify converter

bookish/static/js/reader.js

@@ -386,8 +386,18 @@
     }
 
     function updateActiveToc(loc, toc, book) {
-        // epub.js provides location.start.cfi
         document.querySelectorAll("#tocList li").forEach((l) => l.classList.remove("active"));
+        if (!loc || !loc.start || !toc || !book) return;
+        const href = loc.start.href;
+        if (!href) return;
+        const items = document.querySelectorAll("#tocList li");
+        for (const li of items) {
+            if (li.textContent && href.includes(li.textContent.trim())) {
+                li.classList.add("active");
+                li.scrollIntoView({ block: "nearest" });
+                break;
+            }
+        }
     }
 
     // === Search ===