Cleanup and optimize website

- Remove unused collections (docs, recipes, pets) from config
- Delete sample/template pages and portfolio placeholders
- Remove unused Lunr search files (using Algolia instead)
- Remove duplicate jQuery 1.12.4 and unused smooth-scroll plugin
- Add lazy loading to figure and gallery image templates
- Add font-display: swap to Latin Modern fonts for faster loading
- Clean up commented code in _main.js
- Add CLAUDE.md for project documentation

Author: HFooladi

CLAUDE.md

@@ -0,0 +1,71 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+This is a Jekyll-based personal academic website for Hosein Fooladi, a Machine Learning researcher. The site uses the Minimal Mistakes theme and is hosted on GitHub Pages. It showcases research publications, blog posts, teaching activities, and talks.
+
+## Development Commands
+
+### Local Development
+```bash
+# Install dependencies
+bundle install
+
+# Build the site
+rake build
+# or
+jekyll build --profile --trace --config _config.yml,_config.dev.yml
+
+# Serve locally for development
+bundle exec jekyll serve --config _config.yml,_config.dev.yml
+# or
+rake serve
+```
+
+### Build Configuration
+- Production config: `_config.yml`
+- Development config: `_config.dev.yml` (overrides production settings)
+- Development server runs on http://localhost:4000
+
+## Site Architecture
+
+### Content Collections
+The site uses Jekyll collections to organize different types of content:
+
+- `_posts/` - Blog posts (Markdown files with YAML frontmatter)
+- `_publications/` - Research publications with citations and abstracts
+- `_teaching/` - Teaching activities and courses
+- `_talks/` - Conference talks and presentations
+- `_portfolio/` - Project portfolio items
+- `_pages/` - Static pages (About, Archive pages, etc.)
+
+### Key Configuration
+- **Theme**: Minimal Mistakes remote theme (`mmistakes/minimal-mistakes@master`)
+- **Search**: Algolia-powered search with full content indexing
+- **Comments**: Utterances for GitHub-based comments
+- **Analytics**: Google Universal Analytics
+- **Social**: Twitter, GitHub, LinkedIn integration
+
+### Layouts and Defaults
+- Posts use `single` layout with author profile disabled
+- Pages use `single` layout with author profile enabled
+- Publications and talks use `single` layout with sharing enabled
+- All content supports comments except docs
+
+### Content Structure
+- Publications include citation format, venue, and paper URLs
+- Posts support tags, table of contents (toc), and MathJax
+- All content uses permalink patterns defined in `_config.yml`
+
+### Assets and Styling
+- Custom CSS in `assets/css/` (academicons, collapse effects)
+- Custom fonts including Latin Modern and Font Awesome
+- JavaScript for interactive elements in `assets/js/`
+
+## Important Notes
+- Site builds to `_site/` directory
+- Uses GitHub Pages compatible plugins only
+- Supports both local development and GitHub Pages deployment
+- Search index managed through Algolia with API key configuration

_config.yml

@@ -197,15 +197,6 @@ kramdown:
 
 # Collections
 collections:
-  docs:
-    output: true
-    permalink: /:collection/:path/
-  recipes:
-    output: true
-    permalink: /:collection/:path/
-  pets:
-    output: true
-    permalink: /:collection/:path/
   portfolio:
     output: true
     permalink: /:collection/:path/
@@ -239,28 +230,6 @@ defaults:
     values:
       layout: single
       author_profile: true
-  # _docs
-  - scope:
-      path: ""
-      type: docs
-    values:
-      layout: single
-      read_time: false
-      author_profile: false
-      share: false
-      comments: false
-      toc_sticky: true
-      sidebar:
-        nav: "docs"
-  # _recipes
-  - scope:
-      path: ""
-      type: recipes
-    values:
-      layout: single
-      author_profile: true
-      share: true
-      comments: true
   # _teaching
   - scope:
       path: ""

_includes/figure

@@ -1,7 +1,8 @@
 <figure class="{{ include.class }}">
   {%- if include.popup -%}<a href="{{ include.image_path | relative_url }}" class="image-popup"{% if include.caption %} title="{{ include.caption | markdownify | strip_html }}"{% endif %}>{%- endif -%}
   <img src="{{ include.image_path | relative_url }}"
-       alt="{% if include.alt %}{{ include.alt }}{% endif %}">
+       alt="{% if include.alt %}{{ include.alt }}{% endif %}"
+       loading="lazy">
   {%- if include.popup -%}</a>{%- endif -%}
   {%- if include.caption -%}
     <figcaption>

_includes/gallery

@@ -22,11 +22,13 @@
       <a href="{{ img.url | relative_url }}"
         {% if img.title %}title="{{ img.title }}"{% endif %}>
           <img src="{{ img.image_path | relative_url }}"
-               alt="{% if img.alt %}{{ img.alt }}{% endif %}">
+               alt="{% if img.alt %}{{ img.alt }}{% endif %}"
+               loading="lazy">
       </a>
     {% else %}
       <img src="{{ img.image_path | relative_url }}"
-           alt="{% if img.alt %}{{ img.alt }}{% endif %}">
+           alt="{% if img.alt %}{{ img.alt }}{% endif %}"
+           loading="lazy">
     {% endif %}
   {% endfor %}
   {% if include.caption %}