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/javascript/search.js

@@ -0,0 +1,92 @@
+/**
+ * Search page helper functions
+ * Multi-engine radio button logic
+ *
+ * @package JavaScript
+ * @author	Andreas Goetz	<cpuidle@gmx.de>
+ * @version $Id: search.js,v 1.8 2006/11/28 23:34:04 acidity Exp $
+ */
+
+/**
+ * Select all search fields
+ */
+function selectAllFields()
+{
+	for (var i = 0; i < document.search['fields[]'].length; i++)
+	{
+		document.search['fields[]'].options[i].selected = true;
+	}
+}
+
+/**
+ * Remove enclosing quotes when doing external searches
+ */
+function unQuote(s)
+{
+	var result = s;
+
+	if ((result.length > 2) && (result.substr(0,1) == "\"") && (result.substr(result.length-1,1) == "\""))
+	{
+		result = result.substr(1,result.length-2);
+	}
+
+	return result;
+}
+
+/**
+ * Submit search form depending on selected engine
+ */
+function submitSearch()
+{
+	if (!document.search.q.value) return false;
+
+	with (document.search)
+	{
+		var radio;
+		for (var i=0; i<length; i++)
+		{
+			if ((elements[i].type == "radio") && (elements[i].checked)) {
+				radio = elements[i].value;
+			}
+			if (radio) break;
+		}
+
+		switch (radio)
+		{
+			case "videodb":
+				document.search.submit();
+				break;
+
+			case "imdb":
+				document.searchIMDB.forIMDB.value = unQuote(document.search.q.value);
+				document.searchIMDB.submit();
+				break;
+
+			case "filmweb":
+				document.searchFilmweb.forFilmweb.value = unQuote(document.search.q.value);
+				document.searchFilmweb.submit();
+				break;
+
+			case "tvcom":
+				document.searchTvcom.forTvcom.value = unQuote(document.search.q.value);
+				document.searchTvcom.submit();
+				break;
+
+			case "amazon":
+			case "amazoncom":
+			case "amazonxml":
+				document.searchAmazon.forAmazon.value = unQuote(document.search.q.value);
+				document.searchAmazon.submit();
+				break;
+		}
+	}
+}
+
+/**
+ * Focus field and select contents
+ */
+function selectField(formfield)
+{
+	formfield.focus();
+	formfield.select();
+}