Fix #2216: Table of contents not clickable in read-only mode

Problem:
- In read-only mode, clicking on table of contents links does nothing
- The anchor links use CKEditor's restoreRealElement which may not work in read-only mode

Solution:
- Add fallback to find anchor by ID directly
- Use foundAnchor flag to stop searching after first match

This matches the implementation in links.js which already has this fallback.

www/pad/inner.js

@@ -728,13 +728,21 @@ define([
             var href = el.getAttribute('href');
             if (/^#/.test(href)) {
                 try {
+                    var foundAnchor = false;
                     $inner.find('.cke_anchor[data-cke-realelement]').each(function (j, el) {
+                        if (foundAnchor) { return; }
                         var i = editor.restoreRealElement($(el));
                         var node = i.$;
                         if (node.id === href.slice(1)) {
                             el.scrollIntoView();
+                            foundAnchor = true;
                         }
                     });
+                    // Fallback: try to find anchor by ID directly
+                    if (!foundAnchor) {
+                        var anchorsById = $inner.find('#' + href.slice(1));
+                        if (anchorsById.length) { anchorsById[0].scrollIntoView(); }
+                    }
                 } catch (err) {}
                 return;
             }