feat: add videodb media index with Docker stack

- Add videodb PHP/MySQL media collection manager (Blu-ray, DVD, CD)
- Dockerfile: PHP 8.1 + Apache with GD/mysqli/exif extensions
- docker-compose.yml: app on port 6761 + MySQL 8.0 with health checks
- docker-entrypoint.sh: auto-generates config.inc.php from env vars,
  waits for MySQL, initializes DB schema idempotently
- init-db.php: CLI schema installer using app's own prefix_query() logic
- Persistent volumes for DB, cache, and cover images

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

videodb/templates/elegant/js/search.js

@@ -0,0 +1,94 @@
+/**
+ * Prototype javascript effects for searching
+ * 
+ * @package Templates
+ * @author  Andreas Goetz   <cpuidle@gmx.de>
+ * $Id: search.js,v 1.8 2009/04/04 16:26:30 andig2 Exp $
+ */
+
+Event.observe(document, 'dom:loaded', function()
+{
+    /**
+     * Quicksearch
+     */
+    $('q').focus();
+
+    // Ajax.Autocompleter2 allows passing in complex search parameters like arrays
+    new Ajax.Autocompleter("q", "item_choices", "search.php", {
+        minChars: 2, indicator: 'indicator1', frequency: 0.2,
+        parameters: collect_parameters({ajax_quicksearch: 1}),
+        
+        afterUpdateElement: function(text, li) {
+            document.location = 'show.php?id=' + li.id;
+        }
+    });
+
+    /**
+     * Collect form parameters for search fields and genres
+     */
+    function collect_parameters(parameters)
+    {
+        var res = Object.toQueryString(parameters);
+
+        // owner
+        if ($('owner')) {
+            res += '&owner=' + $F('owner');
+        }
+        
+        // genres
+        $$('#genres input').each(function(el) {
+            if (el.checked) {
+                res += '&genres[]=' + el.value;
+            }
+        });
+
+        // fields
+        $$('#fields option').each(function(el) {
+            if (el.selected) {
+                res += '&fields[]=' + el.value;
+            }
+        });
+
+        return res;
+    }
+
+    /**
+     * Create submit request
+     */
+    function submit_form(event)
+    {
+//        if (!$F('q')) return;        
+        $('indicator1').setStyle({display: 'inline'});
+
+        new Ajax.Request('search.php', {
+            parameters: collect_parameters({ajax_render: 1, q: $F('q')}),
+
+            onSuccess: function(transport, json) {
+                $('indicator1').setStyle({display: 'none'});
+                $('content').update(transport.responseText);
+                $('count').update(json.count);
+            }
+        });
+    }
+
+    /**
+     * Search fields
+     */
+    $$('#fields option').invoke('observe', 'click', submit_form);
+
+    // toggle all
+    $('select_all').observe('click', function() {
+        selectAllFields();
+        submit_form();
+    });
+
+    /**
+     * Genres
+     */
+    $$('#genres input').invoke('observe', 'change', submit_form);
+
+    /**
+     * Owner selection
+     */
+    $$('#owner').invoke('observe', 'change', submit_form);
+});