Add multi-announcement management system

- Update inc/announcements.php to support listing, fetching by ID, toggling, and deleting multiple announcements
- Upgrade admin/index.php to an announcement management view with data table, status indicators, and create/edit sub-views
- Add admin table and action styles to styles.css without using inline style blocks
- Update index.php to render all currently active banner and hours announcements dynamically

index.php

@@ -3,7 +3,7 @@ require __DIR__ . '/config.php';
 require __DIR__ . '/inc/facebook-stats.php';
 require __DIR__ . '/inc/announcements.php';
 $fbStats = fritz_facebook_stats();
-$activeAnnouncement = get_active_announcement();
+$activeAnnouncements = get_active_announcements();
 $siteUrl = rtrim(SITE_URL, '/');
 ?>
 <!doctype html>
@@ -61,14 +61,21 @@ $siteUrl = rtrim(SITE_URL, '/');
     </div>
   </header>
 
-  <?php if ($activeAnnouncement && !empty($activeAnnouncement['show_banner'])): ?>
-    <div class="announcement-banner banner-<?= htmlspecialchars($activeAnnouncement['type']) ?>" role="region" aria-label="Important Announcement">
-      <div class="container announcement-inner">
-        <span class="announcement-tag"><?= htmlspecialchars($activeAnnouncement['headline']) ?></span>
-        <span class="announcement-sep" aria-hidden="true">·</span>
-        <span class="announcement-text"><?= htmlspecialchars($activeAnnouncement['message']) ?></span>
+  <?php
+    $bannerAnnouncements = array_filter($activeAnnouncements, function($a) {
+      return !empty($a['show_banner']);
+    });
+  ?>
+  <?php if (!empty($bannerAnnouncements)): ?>
+    <?php foreach ($bannerAnnouncements as $banner): ?>
+      <div class="announcement-banner banner-<?= htmlspecialchars($banner['type']) ?>" role="region" aria-label="Important Announcement">
+        <div class="container announcement-inner">
+          <span class="announcement-tag"><?= htmlspecialchars($banner['headline']) ?></span>
+          <span class="announcement-sep" aria-hidden="true">·</span>
+          <span class="announcement-text"><?= htmlspecialchars($banner['message']) ?></span>
+        </div>
       </div>
-    </div>
+    <?php endforeach; ?>
   <?php endif; ?>
 
   <main id="main">
@@ -127,12 +134,17 @@ $siteUrl = rtrim(SITE_URL, '/');
         <div class="visit-grid">
           <div class="card reveal">
             <h3>On Tap Thu–Sat</h3>
-            <?php if ($activeAnnouncement && !empty($activeAnnouncement['show_in_hours'])): ?>
-              <div class="hours-alert alert-<?= htmlspecialchars($activeAnnouncement['type']) ?>">
-                <strong><?= htmlspecialchars($activeAnnouncement['headline']) ?>:</strong>
-                <span><?= htmlspecialchars($activeAnnouncement['message']) ?></span>
+            <?php
+              $hoursAnnouncements = array_filter($activeAnnouncements, function($a) {
+                return !empty($a['show_in_hours']);
+              });
+            ?>
+            <?php foreach ($hoursAnnouncements as $hoursNotice): ?>
+              <div class="hours-alert alert-<?= htmlspecialchars($hoursNotice['type']) ?>">
+                <strong><?= htmlspecialchars($hoursNotice['headline']) ?>:</strong>
+                <span><?= htmlspecialchars($hoursNotice['message']) ?></span>
               </div>
-            <?php endif; ?>
+            <?php endforeach; ?>
             <dl class="hours-list">
               <div class="hours-row">
                 <dt>Thursday</dt>
@@ -283,4 +295,4 @@ $siteUrl = rtrim(SITE_URL, '/');
   </script>
 </body>
 
-</html>
+</html>