feat(pages): add blog reading enhancements and gallery lightbox

Add reading progress bar, table of contents sidebar, and back-to-top button for blog post detail pages. TOC auto-generates from h1-h4 headings with smooth scroll navigation and active section highlighting. Sidebar expands on hover from left edge. Add lightbox for gallery images with keyboard navigation (arrows, escape) and captions. Back-to-top button appears after 400px scroll on all pages. All features use inline styles for portability and minimal CSS conflicts.

templates/base/footer.tmpl

@@ -10,5 +10,19 @@
 	{{template "custom/body_outer_post" .}}
 	{{template "base/footer_content" .}}
 	{{template "custom/footer" .}}
+	<button id="back-to-top" style="position:fixed; bottom:32px; right:32px; z-index:9997; width:44px; height:44px; border-radius:50%; border:none; background:var(--color-secondary-bg, rgba(0,0,0,0.65)); color:var(--color-secondary-text, #fff); font-size:20px; cursor:pointer; display:flex; align-items:center; justify-content:center; opacity:0; pointer-events:none; transition:opacity 0.3s, transform 0.3s; transform:translateY(12px); box-shadow:0 2px 12px rgba(0,0,0,0.18);" aria-label="Back to top">
+		<svg width="18" height="18" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M8 13V3"/><path d="M3 7l5-5 5 5"/></svg>
+	</button>
+	<script>
+	(function(){
+		var b=document.getElementById('back-to-top');
+		if(!b)return;
+		window.addEventListener('scroll',function(){
+			if(window.scrollY>400){b.style.opacity='1';b.style.pointerEvents='auto';b.style.transform='translateY(0)';}
+			else{b.style.opacity='0';b.style.pointerEvents='none';b.style.transform='translateY(12px)';}
+		});
+		b.addEventListener('click',function(){window.scrollTo({top:0,behavior:'smooth'});});
+	})();
+	</script>
 </body>
 </html>

templates/pages/base_footer.tmpl

@@ -1,3 +1,190 @@
+{{if .GalleryImages}}
+<div id="pages-lightbox" style="display:none; position:fixed; inset:0; z-index:9999; background:rgba(0,0,0,0.92); align-items:center; justify-content:center; flex-direction:column;">
+	<button id="pages-lb-close" style="position:absolute; top:16px; right:20px; background:none; border:none; color:#fff; font-size:32px; cursor:pointer; z-index:2; line-height:1;" aria-label="Close">&times;</button>
+	<button id="pages-lb-prev" style="position:absolute; left:16px; top:50%; transform:translateY(-50%); background:none; border:none; color:#fff; font-size:28px; cursor:pointer; z-index:2;" aria-label="Previous">&#8249;</button>
+	<button id="pages-lb-next" style="position:absolute; right:16px; top:50%; transform:translateY(-50%); background:none; border:none; color:#fff; font-size:28px; cursor:pointer; z-index:2;" aria-label="Next">&#8250;</button>
+	<img id="pages-lb-img" src="" alt="" style="max-width:90vw; max-height:82vh; object-fit:contain; border-radius:4px; user-select:none;">
+	<div id="pages-lb-caption" style="color:#ccc; font-size:14px; margin-top:12px; text-align:center; max-width:80vw;"></div>
+</div>
+<script>
+(function(){
+	var lb=document.getElementById('pages-lightbox'),img=document.getElementById('pages-lb-img'),
+		cap=document.getElementById('pages-lb-caption'),items=[],idx=0;
+	document.querySelectorAll('.pages-gallery-trigger').forEach(function(el,i){
+		items.push({src:el.dataset.src,caption:el.dataset.caption||''});
+		el.addEventListener('click',function(e){e.preventDefault();idx=i;show();});
+	});
+	function show(){
+		if(!items.length)return;
+		img.src=items[idx].src;img.alt=items[idx].caption;
+		cap.textContent=items[idx].caption;
+		document.getElementById('pages-lb-prev').style.display=idx>0?'':'none';
+		document.getElementById('pages-lb-next').style.display=idx<items.length-1?'':'none';
+		lb.style.display='flex';document.body.style.overflow='hidden';
+	}
+	function hide(){lb.style.display='none';document.body.style.overflow='';}
+	document.getElementById('pages-lb-close').addEventListener('click',hide);
+	document.getElementById('pages-lb-prev').addEventListener('click',function(){if(idx>0){idx--;show();}});
+	document.getElementById('pages-lb-next').addEventListener('click',function(){if(idx<items.length-1){idx++;show();}});
+	lb.addEventListener('click',function(e){if(e.target===lb)hide();});
+	document.addEventListener('keydown',function(e){
+		if(lb.style.display!=='flex')return;
+		if(e.key==='Escape')hide();
+		else if(e.key==='ArrowLeft'&&idx>0){idx--;show();}
+		else if(e.key==='ArrowRight'&&idx<items.length-1){idx++;show();}
+	});
+})();
+</script>
+{{end}}
+{{if .PageIsBlogDetail}}
+<!-- Reading Progress Bar -->
+<div id="blog-progress" style="position:fixed; top:0; left:0; width:100%; height:3px; z-index:9998; background:transparent; pointer-events:none;">
+	<div id="blog-progress-bar" style="height:100%; width:0; background:var(--pages-primary,#4183c4); transition:width 80ms linear;"></div>
+</div>
+
+<!-- Table of Contents Sidebar -->
+<div id="blog-toc" style="position:fixed; left:0; top:50%; transform:translateY(-50%); z-index:9997; display:none;">
+	<div id="blog-toc-tab" style="width:36px; height:36px; display:flex; align-items:center; justify-content:center; background:rgba(0,0,0,0.65); backdrop-filter:blur(8px); border-radius:0 8px 8px 0; cursor:pointer; color:#fff; font-size:14px; transition:opacity 0.2s;" title="Table of Contents">
+		<svg width="16" height="16" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"><line x1="3" y1="4" x2="13" y2="4"/><line x1="3" y1="8" x2="13" y2="8"/><line x1="3" y1="12" x2="10" y2="12"/></svg>
+	</div>
+	<div id="blog-toc-panel" style="position:absolute; left:0; top:50%; transform:translateY(-50%); background:rgba(0,0,0,0.78); backdrop-filter:blur(12px); border-radius:0 10px 10px 0; padding:16px 20px 16px 16px; min-width:220px; max-width:300px; max-height:70vh; overflow-y:auto; opacity:0; pointer-events:none; transition:opacity 0.2s, transform 0.2s; transform:translateY(-50%) translateX(-8px);">
+		<div style="font-size:11px; text-transform:uppercase; letter-spacing:0.08em; color:rgba(255,255,255,0.5); margin-bottom:10px; font-weight:600;">Contents</div>
+		<ul id="blog-toc-list" style="list-style:none; margin:0; padding:0;"></ul>
+	</div>
+</div>
+
+<!-- Back to Top Button -->
+<button id="blog-back-top" style="position:fixed; bottom:32px; right:32px; z-index:9997; width:44px; height:44px; border-radius:50%; border:none; background:rgba(0,0,0,0.65); backdrop-filter:blur(8px); color:#fff; font-size:20px; cursor:pointer; display:flex; align-items:center; justify-content:center; opacity:0; pointer-events:none; transition:opacity 0.3s, transform 0.3s; transform:translateY(12px); box-shadow:0 2px 12px rgba(0,0,0,0.25);" aria-label="Back to top">
+	<svg width="18" height="18" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M8 13V3"/><path d="M3 7l5-5 5 5"/></svg>
+</button>
+
+<script>
+(function(){
+	/* --- Heading scan & TOC build --- */
+	var content=document.querySelector('.markup');
+	if(!content)return;
+	var headings=content.querySelectorAll('h1,h2,h3,h4');
+	var tocList=document.getElementById('blog-toc-list');
+	var tocWrap=document.getElementById('blog-toc');
+	var tocTab=document.getElementById('blog-toc-tab');
+	var tocPanel=document.getElementById('blog-toc-panel');
+	var slugs={};
+
+	if(headings.length>=2&&tocList){
+		tocWrap.style.display='block';
+		headings.forEach(function(h){
+			/* generate slug ID */
+			var text=h.textContent.trim();
+			var slug=text.toLowerCase().replace(/[^\w\s-]/g,'').replace(/\s+/g,'-').replace(/-+/g,'-');
+			if(!slug)slug='section';
+			if(slugs[slug]){slugs[slug]++;slug=slug+'-'+slugs[slug];}
+			else{slugs[slug]=1;}
+			h.id=slug;
+
+			var level=parseInt(h.tagName.charAt(1));
+			var indent=(level-1)*14;
+			var li=document.createElement('li');
+			li.style.marginBottom='6px';
+			var a=document.createElement('a');
+			a.href='#'+slug;
+			a.textContent=text;
+			a.style.cssText='color:rgba(255,255,255,0.75);text-decoration:none;font-size:13px;display:block;padding:3px 0 3px '+indent+'px;border-radius:4px;transition:color 0.15s,background 0.15s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:260px;';
+			a.addEventListener('mouseenter',function(){a.style.color='#fff';});
+			a.addEventListener('mouseleave',function(){if(!a.classList.contains('active'))a.style.color='rgba(255,255,255,0.75)';});
+			a.addEventListener('click',function(e){
+				e.preventDefault();
+				h.scrollIntoView({behavior:'smooth',block:'start'});
+			});
+			a.dataset.target=slug;
+			li.appendChild(a);
+			tocList.appendChild(li);
+		});
+	}
+
+	/* --- TOC hover expand --- */
+	var showTimer,hideTimer;
+	function showPanel(){
+		clearTimeout(hideTimer);
+		tocPanel.style.opacity='1';
+		tocPanel.style.pointerEvents='auto';
+		tocPanel.style.transform='translateY(-50%) translateX(0)';
+		tocTab.style.opacity='0';
+	}
+	function hidePanel(){
+		hideTimer=setTimeout(function(){
+			tocPanel.style.opacity='0';
+			tocPanel.style.pointerEvents='none';
+			tocPanel.style.transform='translateY(-50%) translateX(-8px)';
+			tocTab.style.opacity='1';
+		},200);
+	}
+	if(tocTab&&tocPanel){
+		tocTab.addEventListener('mouseenter',showPanel);
+		tocTab.addEventListener('mouseleave',hidePanel);
+		tocPanel.addEventListener('mouseenter',function(){clearTimeout(hideTimer);});
+		tocPanel.addEventListener('mouseleave',hidePanel);
+	}
+
+	/* --- Active heading tracking --- */
+	var tocLinks=tocList?tocList.querySelectorAll('a'):[];
+	function updateActive(){
+		var scrollTop=window.scrollY||document.documentElement.scrollTop;
+		var current=null;
+		headings.forEach(function(h){
+			if(h.getBoundingClientRect().top<=100)current=h.id;
+		});
+		tocLinks.forEach(function(a){
+			if(a.dataset.target===current){
+				a.style.color='#fff';a.style.background='rgba(255,255,255,0.1)';
+				a.classList.add('active');
+			}else{
+				a.style.color='rgba(255,255,255,0.75)';a.style.background='transparent';
+				a.classList.remove('active');
+			}
+		});
+	}
+
+	/* --- Progress bar --- */
+	var bar=document.getElementById('blog-progress-bar');
+	function updateProgress(){
+		var docH=document.documentElement.scrollHeight-window.innerHeight;
+		if(docH<=0){bar.style.width='100%';return;}
+		var pct=Math.min(100,Math.max(0,(window.scrollY/docH)*100));
+		bar.style.width=pct+'%';
+	}
+
+	/* --- Back to top --- */
+	var btt=document.getElementById('blog-back-top');
+	function updateBtt(){
+		if(window.scrollY>400){
+			btt.style.opacity='1';btt.style.pointerEvents='auto';btt.style.transform='translateY(0)';
+		}else{
+			btt.style.opacity='0';btt.style.pointerEvents='none';btt.style.transform='translateY(12px)';
+		}
+	}
+	if(btt){
+		btt.addEventListener('click',function(){window.scrollTo({top:0,behavior:'smooth'});});
+	}
+
+	/* --- Unified scroll handler --- */
+	var ticking=false;
+	window.addEventListener('scroll',function(){
+		if(!ticking){
+			requestAnimationFrame(function(){
+				updateProgress();
+				updateBtt();
+				if(headings.length>=2)updateActive();
+				ticking=false;
+			});
+			ticking=true;
+		}
+	});
+	updateProgress();
+	updateBtt();
+	if(headings.length>=2)updateActive();
+})();
+</script>
+{{end}}
 {{if .ABTestActive}}
 <script>
 (function() {

templates/pages/base_head.tmpl

@@ -7,7 +7,7 @@
 	<title>{{.BlogPost.Title}} - {{if .Config.Brand.Name}}{{.Config.Brand.Name}}{{else}}{{.Repository.Name}}{{end}}</title>
 	<meta name="description" content="{{if .BlogPost.Subtitle}}{{.BlogPost.Subtitle}}{{else}}{{.Repository.Description}}{{end}}">
 	{{else}}
-	<title>{{if .Config.Hero.Headline}}{{.Config.Hero.Headline}}{{else}}{{.Repository.Name}}{{end}} - {{.Repository.Owner.Name}}</title>
+	<title>{{if .Config.Hero.Headline}}{{.Config.Hero.Headline}}{{else}}{{.Repository.Name}}{{end}} - {{.Repository.Owner.DisplayName}}</title>
 	<meta name="description" content="{{if .Config.Hero.Subheadline}}{{.Config.Hero.Subheadline}}{{else}}{{.Repository.Description}}{{end}}">
 	{{end}}
 	{{if and .PageIsBlogDetail .BlogPost}}

templates/pages/bold-marketing.tmpl

@@ -1200,7 +1200,7 @@
 			<span>{{DateUtils.AbsoluteShort .BlogPost.CreatedUnix}}</span>
 			{{if .BlogTags}}<span>&middot;</span>{{range .BlogTags}}<span style="background: var(--nb-surface); border: 1px solid var(--nb-border-hard); padding: 2px 8px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em;">{{.}}</span> {{end}}{{end}}
 		</div>
-		<div class="markup nb-blog-content" style="color: var(--nb-text); line-height: 1.8; font-size: 16px; text-align: left;">
+		<div class="markup nb-blog-content" style="color: var(--nb-text); line-height: 1.8; font-size: 18px; text-align: left;">
 			{{.BlogRenderedContent}}
 		</div>
 		<div style="margin-top: 48px; padding-top: 24px; border-top: 2px solid var(--nb-border-hard);">
@@ -1571,7 +1571,7 @@
 	<div style="display: grid; grid-template-columns: repeat({{if .Config.Gallery.Columns}}{{.Config.Gallery.Columns}}{{else}}3{{end}}, 1fr); gap: 4px;">
 	{{range .GalleryImages}}
 		<div class="nb-reveal" style="overflow: hidden; clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));">
-		<a href="{{.URL}}" target="_blank" style="display: block; position: relative;">
+		<a href="{{.URL}}" class="pages-gallery-trigger" data-src="{{.URL}}" data-caption="{{if .Caption}}{{.Caption}}{{else}}{{.Name}}{{end}}" style="display: block; position: relative; cursor: pointer;">
 			<img src="{{.URL}}" alt="{{if .Caption}}{{.Caption}}{{else}}{{.Name}}{{end}}" style="width: 100%; height: 220px; object-fit: cover; display: block;">
 			{{if .Caption}}
 			<div style="position: absolute; bottom: 0; left: 0; right: 0; padding: 12px 16px; background: linear-gradient(transparent, rgba(0,0,0,0.7)); font-size: 13px; color: #fff;">{{.Caption}}</div>

templates/pages/minimalist-docs.tmpl

@@ -1062,7 +1062,7 @@
 			<span>{{DateUtils.AbsoluteShort .BlogPost.CreatedUnix}}</span>
 			{{if .BlogTags}}<span>&middot;</span>{{range .BlogTags}}<span style="background: var(--ea-surface); padding: 2px 8px; border-radius: 3px; font-size: 12px; color: var(--ea-accent);">{{.}}</span> {{end}}{{end}}
 		</div>
-		<div class="markup ea-blog-content" style="color: var(--ea-text); line-height: 1.8; font-size: 16px; font-family: 'Cormorant Garamond', serif;">
+		<div class="markup ea-blog-content" style="color: var(--ea-text); line-height: 1.8; font-size: 18px; font-family: 'Cormorant Garamond', serif;">
 			{{.BlogRenderedContent}}
 		</div>
 		<div style="margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--ea-border);">
@@ -1443,7 +1443,7 @@
 	<div style="display: grid; grid-template-columns: repeat({{if .Config.Gallery.Columns}}{{.Config.Gallery.Columns}}{{else}}3{{end}}, 1fr); gap: 16px;">
 	{{range .GalleryImages}}
 		<div class="ea-reveal" style="overflow: hidden; border-radius: 4px; border: 1px solid var(--ea-border);">
-		<a href="{{.URL}}" target="_blank" style="display: block;">
+		<a href="{{.URL}}" class="pages-gallery-trigger" data-src="{{.URL}}" data-caption="{{if .Caption}}{{.Caption}}{{else}}{{.Name}}{{end}}" style="display: block; cursor: pointer;">
 			<img src="{{.URL}}" alt="{{if .Caption}}{{.Caption}}{{else}}{{.Name}}{{end}}" style="width: 100%; height: 200px; object-fit: cover; display: block;">
 		</a>
 		{{if .Caption}}

templates/pages/open-source-hero.tmpl

@@ -1035,7 +1035,7 @@
 			<span>{{DateUtils.AbsoluteShort .BlogPost.CreatedUnix}}</span>
 			{{if .BlogTags}}<span>&middot;</span>{{range .BlogTags}}<span style="background: var(--osh-glow); padding: 2px 8px; border-radius: 4px; font-size: 12px;">{{.}}</span> {{end}}{{end}}
 		</div>
-		<div class="markup osh-blog-content" style="color: var(--osh-text); line-height: 1.8; font-size: 16px; text-align: left;">
+		<div class="markup osh-blog-content" style="color: var(--osh-text); line-height: 1.8; font-size: 18px; text-align: left;">
 			{{.BlogRenderedContent}}
 		</div>
 		<div style="margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.06);">
@@ -1442,7 +1442,7 @@
 		<div style="display: grid; grid-template-columns: repeat({{if .Config.Gallery.Columns}}{{.Config.Gallery.Columns}}{{else}}3{{end}}, 1fr); gap: 16px;">
 		{{range .GalleryImages}}
 			<div class="osh-feature-card osh-reveal" style="padding: 0; overflow: hidden;">
-			<a href="{{.URL}}" target="_blank" style="display: block;">
+			<a href="{{.URL}}" class="pages-gallery-trigger" data-src="{{.URL}}" data-caption="{{if .Caption}}{{.Caption}}{{else}}{{.Name}}{{end}}" style="display: block; cursor: pointer;">
 				<img src="{{.URL}}" alt="{{if .Caption}}{{.Caption}}{{else}}{{.Name}}{{end}}" style="width: 100%; height: 220px; object-fit: cover; display: block;">
 			</a>
 			{{if .Caption}}

templates/pages/saas-conversion.tmpl

@@ -1173,7 +1173,7 @@
 			<span>{{DateUtils.AbsoluteShort .BlogPost.CreatedUnix}}</span>
 			{{if .BlogTags}}<span>&middot;</span>{{range .BlogTags}}<span style="background: var(--gm-glass); border: 1px solid var(--gm-glass-border); padding: 2px 8px; border-radius: 20px; font-size: 12px;">{{.}}</span> {{end}}{{end}}
 		</div>
-		<div class="markup gm-blog-content" style="color: var(--gm-text); line-height: 1.8; font-size: 16px; text-align: left;">
+		<div class="markup gm-blog-content" style="color: var(--gm-text); line-height: 1.8; font-size: 18px; text-align: left;">
 			{{.BlogRenderedContent}}
 		</div>
 		<div style="margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--gm-glass-border);">
@@ -1581,7 +1581,7 @@
 		<div style="display: grid; grid-template-columns: repeat({{if .Config.Gallery.Columns}}{{.Config.Gallery.Columns}}{{else}}3{{end}}, 1fr); gap: 16px;">
 		{{range .GalleryImages}}
 			<div class="gm-value-card gm-reveal" style="padding: 0; overflow: hidden;">
-			<a href="{{.URL}}" target="_blank" style="display: block;">
+			<a href="{{.URL}}" class="pages-gallery-trigger" data-src="{{.URL}}" data-caption="{{if .Caption}}{{.Caption}}{{else}}{{.Name}}{{end}}" style="display: block; cursor: pointer;">
 				<img src="{{.URL}}" alt="{{if .Caption}}{{.Caption}}{{else}}{{.Name}}{{end}}" style="width: 100%; height: 220px; object-fit: cover; display: block;">
 			</a>
 			{{if .Caption}}

templates/repo/header.tmpl

@@ -8,7 +8,7 @@
 				</div>
 				<div class="flex-item-main">
 					<div class="flex-item-title tw-text-18">
-						<a class="muted tw-font-normal" href="{{.Owner.HomeLink}}">{{.Owner.Name}}</a>/<a class="muted" href="{{$.RepoLink}}">{{if .DisplayTitle}}{{.DisplayTitle}}{{else}}{{.Name}}{{end}}</a>
+						<a class="muted tw-font-normal" href="{{.Owner.HomeLink}}">{{.Owner.DisplayName}}</a>/<a class="muted" href="{{$.RepoLink}}">{{if .DisplayTitle}}{{.DisplayTitle}}{{else}}{{.Name}}{{end}}</a>
 					</div>
 				</div>
 				<div class="flex-item-trailing">