Add themes, static assets, and logo

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Co-Authored-By: Claude <noreply@anthropic.com>

themes/modern-card-ui/card-template.html

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+<!-- Modern Card UI - Post Card Template -->
+<template id="modern-card-template">
+  <article class="post-card" data-post-id="{{id}}" data-platform="{{platform}}">
+    <div class="card-surface">
+      <!-- Header -->
+      <header class="card-header">
+        <div class="header-meta">
+          <span class="platform-badge platform-{{platform}}">{{platform|upper}}</span>
+          {% if source %}
+            <span class="card-source">{{source}}</span>
+          {% endif %}
+        </div>
+
+        <div class="vote-indicator">
+          <span class="vote-score">{{score}}</span>
+          <span class="vote-label">pts</span>
+        </div>
+      </header>
+
+      <!-- Title -->
+      <div class="card-title-section">
+        <h2 class="card-title">
+          <a href="{{post_url}}" class="title-link">{{title}}</a>
+        </h2>
+      </div>
+
+      <!-- Content Preview -->
+      {% if content %}
+      <div class="card-content-preview">
+        <p class="content-text">{{ truncate(content, 150) }}</p>
+      </div>
+      {% endif %}
+
+      <!-- Footer -->
+      <footer class="card-footer">
+        <div class="author-info">
+          <span class="author-name">{{author}}</span>
+          <span class="post-time">{{formatTimeAgo(timestamp)}}</span>
+        </div>
+
+        <div class="engagement-info">
+          <span class="reply-count">{{replies}} replies</span>
+        </div>
+      </footer>
+
+      <!-- Tags -->
+      {% if tags %}
+      <div class="card-tags">
+        {% for tag in tags[:3] if tag %}
+          <span class="tag-chip">{{tag}}</span>
+        {% endfor %}
+        {% if tags|length > 3 %}
+          <span class="tag-more">+{{tags|length - 3}} more</span>
+        {% endif %}
+      </div>
+      {% endif %}
+    </div>
+  </article>
+</template>