feat: add dropdown navigation menus

- Add Blog dropdown with all post types (articles, notes, photos, bookmarks, likes, replies, reposts)
- Add Activity dropdown with GitHub, Listening, Funkwhale, YouTube
- Add /news and /interactions links to main nav
- Add mobile-responsive collapsible sections with Alpine.js
- Add CSS for dropdown menus and mobile nav sections

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

_includes/layouts/base.njk

@@ -93,14 +93,42 @@
         <nav class="site-nav" id="site-nav">
           <a href="/">Home</a>
           <a href="/about/">About</a>
-          <a href="/blog/">Blog</a>
+          {# Blog dropdown #}
+          <div class="nav-dropdown" x-data="{ open: false }" @mouseenter="open = true" @mouseleave="open = false">
+            <a href="/blog/" class="nav-dropdown-trigger">
+              Blog
+              <svg class="w-3 h-3 ml-1 inline" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"/>
+              </svg>
+            </a>
+            <div class="nav-dropdown-menu" x-show="open" x-transition x-cloak>
+              <a href="/blog/">All Posts</a>
               <a href="/articles/">Articles</a>
               <a href="/notes/">Notes</a>
+              <a href="/photos/">Photos</a>
+              <a href="/bookmarks/">Bookmarks</a>
+              <a href="/likes/">Likes</a>
+              <a href="/replies/">Replies</a>
+              <a href="/reposts/">Reposts</a>
+            </div>
+          </div>
           <a href="/interactions/">Interactions</a>
+          <a href="/news/">News</a>
+          {# Activity dropdown #}
+          <div class="nav-dropdown" x-data="{ open: false }" @mouseenter="open = true" @mouseleave="open = false">
+            <button type="button" class="nav-dropdown-trigger">
+              Activity
+              <svg class="w-3 h-3 ml-1 inline" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"/>
+              </svg>
+            </button>
+            <div class="nav-dropdown-menu" x-show="open" x-transition x-cloak>
               <a href="/github/">GitHub</a>
               <a href="/listening/">Listening</a>
               <a href="/funkwhale/">Funkwhale</a>
               <a href="/youtube/">YouTube</a>
+            </div>
+          </div>
         </nav>
         <button id="theme-toggle" type="button" class="theme-toggle" aria-label="Toggle dark mode" title="Toggle dark mode">
           <svg class="sun-icon" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
@@ -115,17 +143,45 @@
     </div>
 
     {# Mobile nav dropdown #}
-    <nav class="mobile-nav hidden" id="mobile-nav">
+    <nav class="mobile-nav hidden" id="mobile-nav" x-data="{ blogOpen: false, activityOpen: false }">
       <a href="/">Home</a>
       <a href="/about/">About</a>
-      <a href="/blog/">Blog</a>
+      {# Blog section #}
+      <div class="mobile-nav-section">
+        <button type="button" class="mobile-nav-toggle" @click="blogOpen = !blogOpen">
+          Blog
+          <svg class="w-4 h-4 transition-transform" :class="{ 'rotate-180': blogOpen }" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"/>
+          </svg>
+        </button>
+        <div class="mobile-nav-submenu" x-show="blogOpen" x-collapse>
+          <a href="/blog/">All Posts</a>
           <a href="/articles/">Articles</a>
           <a href="/notes/">Notes</a>
+          <a href="/photos/">Photos</a>
+          <a href="/bookmarks/">Bookmarks</a>
+          <a href="/likes/">Likes</a>
+          <a href="/replies/">Replies</a>
+          <a href="/reposts/">Reposts</a>
+        </div>
+      </div>
       <a href="/interactions/">Interactions</a>
+      <a href="/news/">News</a>
+      {# Activity section #}
+      <div class="mobile-nav-section">
+        <button type="button" class="mobile-nav-toggle" @click="activityOpen = !activityOpen">
+          Activity
+          <svg class="w-4 h-4 transition-transform" :class="{ 'rotate-180': activityOpen }" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"/>
+          </svg>
+        </button>
+        <div class="mobile-nav-submenu" x-show="activityOpen" x-collapse>
           <a href="/github/">GitHub</a>
           <a href="/listening/">Listening</a>
           <a href="/funkwhale/">Funkwhale</a>
           <a href="/youtube/">YouTube</a>
+        </div>
+      </div>
     </nav>
   </header>
 

css/tailwind.css

@@ -68,10 +68,28 @@
     @apply flex items-center gap-4;
   }
 
-  .site-nav a {
+  .site-nav > a,
+  .site-nav .nav-dropdown-trigger {
     @apply text-surface-600 dark:text-surface-400 hover:text-primary-600 dark:hover:text-primary-400 no-underline transition-colors py-2;
   }
 
+  /* Navigation dropdown */
+  .nav-dropdown {
+    @apply relative;
+  }
+
+  .nav-dropdown-trigger {
+    @apply flex items-center gap-1 cursor-pointer bg-transparent border-none text-base;
+  }
+
+  .nav-dropdown-menu {
+    @apply absolute top-full left-0 mt-1 py-2 bg-white dark:bg-surface-800 border border-surface-200 dark:border-surface-700 rounded-lg shadow-lg min-w-[160px] z-50;
+  }
+
+  .nav-dropdown-menu a {
+    @apply block px-4 py-2 text-sm text-surface-600 dark:text-surface-400 hover:bg-surface-100 dark:hover:bg-surface-700 hover:text-primary-600 dark:hover:text-primary-400 no-underline;
+  }
+
   /* Mobile menu toggle button */
   .menu-toggle {
     @apply md:hidden p-2 rounded-lg text-surface-600 dark:text-surface-400 hover:bg-surface-100 dark:hover:bg-surface-800 transition-colors;
@@ -86,6 +104,23 @@
     @apply block px-4 py-3 text-surface-600 dark:text-surface-400 hover:bg-surface-100 dark:hover:bg-surface-800 hover:text-primary-600 dark:hover:text-primary-400 no-underline transition-colors border-b border-surface-100 dark:border-surface-800 last:border-b-0;
   }
 
+  /* Mobile nav collapsible sections */
+  .mobile-nav-section {
+    @apply border-b border-surface-100 dark:border-surface-800;
+  }
+
+  .mobile-nav-toggle {
+    @apply flex items-center justify-between w-full px-4 py-3 text-surface-600 dark:text-surface-400 hover:bg-surface-100 dark:hover:bg-surface-800 hover:text-primary-600 dark:hover:text-primary-400 transition-colors bg-transparent border-none text-base text-left cursor-pointer;
+  }
+
+  .mobile-nav-submenu {
+    @apply bg-surface-50 dark:bg-surface-800;
+  }
+
+  .mobile-nav-submenu a {
+    @apply pl-8 py-2 text-sm border-b-0;
+  }
+
   /* Theme toggle button */
   .theme-toggle {
     @apply p-2 rounded-lg text-surface-600 dark:text-surface-400 hover:bg-surface-100 dark:hover:bg-surface-800 transition-colors;