Add Gruvbox share theme + blog system for Trilium (anonymized)

Blog generator, publish manager, share scripts, theme CSS, highlight.js
bundles, font, favicon, templates and generated-reference outputs, plus an
English installation guide.

scripts/prev_next.js

@@ -0,0 +1,33 @@
+<script>
+(function () {
+    var data = window.blogData;
+    if (!data || !data.articles || !data.articles.length) return;
+    var id = document.body.getAttribute("data-note-id");
+    var list = data.articles;
+    var idx = -1;
+    for (var i = 0; i < list.length; i++) { if (list[i].id === id) { idx = i; break; } }
+    if (idx < 0) return;
+    var builtin = document.querySelector("#content-footer .navigation");
+    if (builtin) builtin.style.display = "none";
+    var content = document.getElementById("content");
+    if (!content) return;
+    var prev = idx + 1 < list.length ? list[idx + 1] : null;
+    var next = idx > 0 ? list[idx - 1] : null;
+    if (!prev && !next) return;
+    var box = document.createElement("nav");
+    box.className = "blog-prevnext";
+    var inner = "";
+    if (prev) {
+        inner += '<a class="blog-pn prev" href="' + prev.url + '"><span class="blog-pn-label">Previous</span><span class="blog-pn-title">' + prev.title + '</span></a>';
+    } else {
+        inner += '<span class="blog-pn empty"></span>';
+    }
+    if (next) {
+        inner += '<a class="blog-pn next" href="' + next.url + '"><span class="blog-pn-label">Next</span><span class="blog-pn-title">' + next.title + '</span></a>';
+    } else {
+        inner += '<span class="blog-pn empty"></span>';
+    }
+    box.innerHTML = inner;
+    content.appendChild(box);
+})();
+</script>