ui change to improve tag list load

app/main.py

@@ -423,27 +423,22 @@ def gallery_jump():
     )
 
 
-@main.route('/tags')
-def tag_list():
+def _get_tags_with_previews(kind=None, limit=35, offset=0, images_per_tag=3):
     """
-    Generic tag explorer:
-      /tags            -> all tags
-      /tags?kind=user  -> only user tags
-      /tags?kind=artist -> only artist tags
-      /tags?kind=archive -> only archive tags
-      /tags?kind=character -> only character tags
-      /tags?kind=series -> only series tags
-      /tags?kind=rating -> only rating tags
-    Shows a few preview images per tag.
+    Helper function to get tags with counts and preview images.
+    Returns (tag_data list, total_count, has_more).
 
     Optimized to use 2 queries instead of N+1:
-    1. Get all tags with counts
-    2. Get preview images for all tags at once using window function
+    1. Get tags with counts (paginated)
+    2. Get preview images for those tags using window function
     """
-    images_per_tag = 3
-    kind = request.args.get('kind')
+    # Query for total count
+    count_q = db.session.query(func.count(Tag.id))
+    if kind:
+        count_q = count_q.filter(Tag.kind == kind)
+    total_count = count_q.scalar()
 
-    # Query 1: Get tags with image counts
+    # Query 1: Get tags with image counts (paginated)
     q = db.session.query(
         Tag,
         func.count(image_tags.c.image_id).label('img_count')
@@ -452,7 +447,7 @@ def tag_list():
     if kind:
         q = q.filter(Tag.kind == kind)
 
-    tags_with_counts = q.order_by(Tag.name.asc()).all()
+    tags_with_counts = q.order_by(Tag.name.asc()).offset(offset).limit(limit).all()
 
     # Build tag_id list and initialize tag_data dict
     tag_ids = [t.id for t, _ in tags_with_counts]
@@ -469,9 +464,7 @@ def tag_list():
         }
 
     # Query 2: Get preview images for all tags at once using a subquery with row_number
-    # This fetches the top N images per tag in a single query
     if tag_ids:
-        # Subquery to rank images within each tag
         row_num = func.row_number().over(
             partition_by=image_tags.c.tag_id,
             order_by=desc(func.coalesce(ImageRecord.taken_at, ImageRecord.imported_at))
@@ -488,7 +481,6 @@ def tag_list():
             .subquery()
         )
 
-        # Get only the top N images per tag
         preview_rows = (
             db.session.query(subq.c.tag_id, ImageRecord)
             .join(ImageRecord, ImageRecord.id == subq.c.image_id)
@@ -496,18 +488,70 @@ def tag_list():
             .all()
         )
 
-        # Group images by tag_id
         for tag_id, img in preview_rows:
             if tag_id in tag_map:
                 tag_map[tag_id]["images"].append(img)
 
     # Convert to list maintaining original order
     tag_data = [tag_map[t.id] for t, _ in tags_with_counts]
+    has_more = (offset + len(tag_data)) < total_count
+
+    return tag_data, total_count, has_more
+
+
+@main.route('/tags')
+def tag_list():
+    """
+    Generic tag explorer with infinite scroll:
+      /tags            -> all tags
+      /tags?kind=user  -> only user tags
+      etc.
+    Shows a few preview images per tag.
+    Initially loads 35 tags, more loaded via API as user scrolls.
+    """
+    kind = request.args.get('kind')
+    limit = 35
+    images_per_tag = 3
+
+    tag_data, total_count, has_more = _get_tags_with_previews(
+        kind=kind, limit=limit, offset=0, images_per_tag=images_per_tag
+    )
 
     return render_template('tags_list.html',
                            tag_data=tag_data,
                            images_per_tag=images_per_tag,
-                           active_kind=kind)
+                           active_kind=kind,
+                           total_count=total_count,
+                           has_more=has_more,
+                           page_size=limit)
+
+
+@main.route('/api/tags/list')
+def api_tags_list():
+    """
+    API endpoint for loading more tags (infinite scroll).
+    Returns JSON with tag cards HTML and pagination info.
+    """
+    kind = request.args.get('kind')
+    offset = request.args.get('offset', 0, type=int)
+    limit = request.args.get('limit', 35, type=int)
+    images_per_tag = 3
+
+    tag_data, total_count, has_more = _get_tags_with_previews(
+        kind=kind, limit=limit, offset=offset, images_per_tag=images_per_tag
+    )
+
+    # Render tag cards to HTML
+    cards_html = render_template('_tag_cards.html', tag_data=tag_data)
+
+    return jsonify(
+        ok=True,
+        html=cards_html,
+        count=len(tag_data),
+        total=total_count,
+        has_more=has_more,
+        offset=offset + len(tag_data)
+    )
 
 @main.route('/artists')
 def artist_list():

app/static/js/tag-editor.js

@@ -13,30 +13,31 @@ document.addEventListener('DOMContentLoaded', () => {
 
   let currentTagCard = null;
 
-  // Open modal when edit button clicked
-  document.querySelectorAll('.tag-edit-btn').forEach(btn => {
-    btn.addEventListener('click', async (e) => {
-      e.preventDefault();
-      e.stopPropagation();
+  // Open modal when edit button clicked (using event delegation for infinite scroll)
+  document.addEventListener('click', async (e) => {
+    const btn = e.target.closest('.tag-edit-btn');
+    if (!btn) return;
 
-      const tagId = btn.dataset.tagId;
-      currentTagCard = btn.closest('.tag-card');
+    e.preventDefault();
+    e.stopPropagation();
 
-      // Fetch tag details
-      try {
-        const res = await fetch(`/api/tag/${tagId}`);
-        const data = await res.json();
+    const tagId = btn.dataset.tagId;
+    currentTagCard = btn.closest('.tag-card');
 
-        if (data.ok) {
-          tagIdInput.value = data.tag.id;
-          nameInput.value = data.tag.display_name;
-          kindSelect.value = data.tag.kind || 'user';
-          modal.classList.add('active');
-        }
-      } catch (err) {
-        console.error('Failed to load tag:', err);
+    // Fetch tag details
+    try {
+      const res = await fetch(`/api/tag/${tagId}`);
+      const data = await res.json();
+
+      if (data.ok) {
+        tagIdInput.value = data.tag.id;
+        nameInput.value = data.tag.display_name;
+        kindSelect.value = data.tag.kind || 'user';
+        modal.classList.add('active');
       }
-    });
+    } catch (err) {
+      console.error('Failed to load tag:', err);
+    }
   });
 
   // Close modal

app/static/style.css

@@ -1825,6 +1825,32 @@ select.form-input optgroup {
   border-top: 1px solid rgba(255,255,255,0.05);
 }
 
+/* Infinite scroll loading indicator */
+.loading-indicator {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 0.75rem;
+  padding: 2rem;
+  color: var(--text-muted);
+}
+
+.loading-indicator .spinner {
+  display: inline-block;
+  width: 20px;
+  height: 20px;
+  border: 2px solid rgba(255,255,255,0.2);
+  border-top-color: var(--btn-primary);
+  border-radius: 50%;
+  animation: spin 0.8s linear infinite;
+}
+
+/* Scroll sentinel for IntersectionObserver */
+.scroll-sentinel {
+  height: 1px;
+  width: 100%;
+}
+
 /* Play overlay with triangle icon */
 .play-overlay::before {
   content: '';

app/templates/_tag_cards.html

@@ -0,0 +1,34 @@
+<!-- /app/templates/_tag_cards.html -->
+{% for tag in tag_data %}
+  <div class="tag-card" data-tag-id="{{ tag.id }}" data-tag-name="{{ tag.tag }}" data-tag-kind="{{ tag.kind }}">
+    <a href="{{ url_for('main.gallery', tag=tag.tag) }}" class="tag-card-link">
+      <div class="tag-preview">
+        {% for image in tag.images %}
+          <img class="tag-thumb"
+               src="{{ url_for('main.serve_image', filename=(image.thumb_path or image.filepath) | replace('/images/', '') ) }}"
+               loading="lazy"
+               alt="">
+        {% endfor %}
+        {% if tag.images|length == 0 %}
+          <div class="tag-thumb tag-thumb-empty"></div>
+        {% endif %}
+      </div>
+      <div class="tag-card-info">
+        <span class="tag-icon">
+          {%- if tag.kind == 'artist' -%}🎨
+          {%- elif tag.kind == 'character' -%}👤
+          {%- elif tag.kind == 'series' -%}📺
+          {%- elif tag.kind == 'fandom' -%}🎭
+          {%- elif tag.kind == 'rating' -%}⚠️
+          {%- elif tag.kind == 'archive' -%}🗜️
+          {%- elif tag.kind == 'source' -%}🌐
+          {%- elif tag.kind == 'post' -%}📌
+          {%- else -%}#{%- endif -%}
+        </span>
+        <span class="tag-name" title="{{ tag.name }}">{{ tag.name }}</span>
+        <span class="tag-count">{{ tag.count }}</span>
+      </div>
+    </a>
+    <button class="tag-edit-btn" title="Edit tag" data-tag-id="{{ tag.id }}">✏️</button>
+  </div>
+{% endfor %}

app/templates/tags_list.html

@@ -70,41 +70,27 @@
 </div>
 
 {% if tag_data %}
-<div class="tag-grid">
-  {% for tag in tag_data %}
-    <div class="tag-card" data-tag-id="{{ tag.id }}" data-tag-name="{{ tag.tag }}" data-tag-kind="{{ tag.kind }}">
-      <a href="{{ url_for('main.gallery', tag=tag.tag) }}" class="tag-card-link">
-        <div class="tag-preview">
-          {% for image in tag.images %}
-            <img class="tag-thumb"
-                 src="{{ url_for('main.serve_image', filename=(image.thumb_path or image.filepath) | replace('/images/', '') ) }}"
-                 loading="lazy"
-                 alt="">
-          {% endfor %}
-          {% if tag.images|length == 0 %}
-            <div class="tag-thumb tag-thumb-empty"></div>
-          {% endif %}
-        </div>
-        <div class="tag-card-info">
-          <span class="tag-icon">
-            {%- if tag.kind == 'artist' -%}🎨
-            {%- elif tag.kind == 'character' -%}👤
-            {%- elif tag.kind == 'series' -%}📺
-            {%- elif tag.kind == 'fandom' -%}🎭
-            {%- elif tag.kind == 'rating' -%}⚠️
-            {%- elif tag.kind == 'archive' -%}🗜️
-            {%- elif tag.kind == 'source' -%}🌐
-            {%- elif tag.kind == 'post' -%}📌
-            {%- else -%}#{%- endif -%}
-          </span>
-          <span class="tag-name" title="{{ tag.name }}">{{ tag.name }}</span>
-          <span class="tag-count">{{ tag.count }}</span>
-        </div>
-      </a>
-      <button class="tag-edit-btn" title="Edit tag" data-tag-id="{{ tag.id }}">✏️</button>
-    </div>
-  {% endfor %}
+<div class="tag-grid" id="tagGrid">
+  {% include '_tag_cards.html' %}
 </div>
+
+<!-- Infinite scroll sentinel and loading indicator -->
+<div id="tagScrollSentinel" class="scroll-sentinel" {% if not has_more %}style="display: none;"{% endif %}></div>
+<div id="tagLoadingIndicator" class="loading-indicator" style="display: none;">
+  <span class="spinner"></span> Loading more tags...
+</div>
+
+<!-- Infinite scroll state -->
+<script>
+  window.tagListState = {
+    kind: {{ (active_kind | tojson) if active_kind else 'null' }},
+    offset: {{ tag_data | length }},
+    pageSize: {{ page_size }},
+    hasMore: {{ 'true' if has_more else 'false' }},
+    loading: false,
+    total: {{ total_count }}
+  };
+</script>
 {% else %}
 <p class="empty-state">No tags found in this category.</p>
 {% endif %}
@@ -146,4 +132,90 @@
 </div>
 
 <script src="{{ url_for('static', filename='js/tag-editor.js') }}"></script>
+<script>
+// Tag list infinite scroll
+(function() {
+  const state = window.tagListState;
+  if (!state) return;
+
+  const grid = document.getElementById('tagGrid');
+  const sentinel = document.getElementById('tagScrollSentinel');
+  const loading = document.getElementById('tagLoadingIndicator');
+  if (!grid || !sentinel) return;
+
+  async function loadMoreTags() {
+    if (state.loading || !state.hasMore) return;
+
+    state.loading = true;
+    loading.style.display = 'flex';
+
+    try {
+      const params = new URLSearchParams({
+        offset: state.offset,
+        limit: state.pageSize
+      });
+      if (state.kind) {
+        params.set('kind', state.kind);
+      }
+
+      const response = await fetch(`/api/tags/list?${params}`);
+      const data = await response.json();
+
+      if (data.ok && data.html) {
+        // Append new cards to grid
+        grid.insertAdjacentHTML('beforeend', data.html);
+
+        // Update state
+        state.offset = data.offset;
+        state.hasMore = data.has_more;
+
+        // Re-attach edit button listeners for new cards
+        attachEditListeners();
+
+        // Hide sentinel if no more data
+        if (!state.hasMore) {
+          sentinel.style.display = 'none';
+        }
+      }
+    } catch (error) {
+      console.error('Failed to load more tags:', error);
+    } finally {
+      state.loading = false;
+      loading.style.display = 'none';
+    }
+  }
+
+  // Re-attach edit button event listeners after loading new cards
+  function attachEditListeners() {
+    // The tag-editor.js handles this via event delegation on document,
+    // so new buttons should work automatically
+  }
+
+  // Set up IntersectionObserver for infinite scroll
+  if ('IntersectionObserver' in window) {
+    const observer = new IntersectionObserver(
+      (entries) => {
+        if (entries[0].isIntersecting && state.hasMore && !state.loading) {
+          loadMoreTags();
+        }
+      },
+      { rootMargin: '200px' }
+    );
+    observer.observe(sentinel);
+  } else {
+    // Fallback for older browsers: use scroll event
+    let scrollTimeout;
+    window.addEventListener('scroll', () => {
+      clearTimeout(scrollTimeout);
+      scrollTimeout = setTimeout(() => {
+        const scrollY = window.scrollY + window.innerHeight;
+        const docHeight = document.documentElement.scrollHeight;
+        if (scrollY >= docHeight - 500 && state.hasMore && !state.loading) {
+          loadMoreTags();
+        }
+      }, 100);
+    });
+  }
+})();
+</script>
 {% endblock %}