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/nexgen/borrow.tpl

@@ -0,0 +1,98 @@
+{*
+  Borrow template
+  $Id: borrow.tpl,v 1.4 2013/03/12 19:13:18 andig2 Exp $
+*}
+
+<!-- {$smarty.template} -->
+
+<div class="row">
+	<div class="small-12 large-8 columns small-centered">
+
+		<h3 class="subheader">{$lang.borrow}</h3>
+
+		{if $diskid && $editable}
+		<form action="borrow.php" name="formborrow" method="post">
+			<input type="hidden" name="diskid" value="{$diskid}" />
+			<input type="hidden" name="return" value="1" />
+
+			{if $who}
+			<h5 class="subheader">
+				{$lang.diskid} {$diskid}
+				{$lang.lentto} {$who} ({$dt})
+			</h5>
+			<input type="submit" class="button" value="{$lang.returned}" />
+
+			{else}
+			<h5 class="subheader">
+				{$lang.diskid} {$diskid} {$lang.available}
+			</h5>
+			<div class="row collapse">
+				<div class="small-10 columns">
+					<input type="text" name="who" />
+				</div>
+				<div class="small-2 columns">
+					<a href="#" class="button postfix submit">{$lang.borrow}</a>
+				</div>
+			</div>
+			{/if}
+		</form>
+		{/if}
+
+
+		{if $config.multiuser}
+		<h5 class="subheader">{$lang.curlentfrom}</h5>
+		<form action="borrow.php">
+			{html_options name=owner options=$owners selected=$owner class="autosubmit"}
+		</form>
+		{else}
+		<h5 class="subheader">{$lang.curlent}</h5>
+		{/if}
+
+		{if $borrowlist}
+		<table class="small-12">
+			<thead>
+				<tr>
+					<th><h5 class="subheader">{$lang.diskid}</h5></th>
+					{if $config.multiuser}<th><h5 class="subheader">{$lang.owner}</h5></th>{/if}
+					<th><h5 class="subheader">{$lang.title}</h5></th>
+					<th><h5 class="subheader">{$lang.lentto}</h5></th>
+					<th><h5 class="subheader">{$lang.date}</h5></th>
+					<th></th>
+				</tr>
+			</thead>
+
+			<tbody>
+				{foreach item=disk from=$borrowlist}
+				<tr>
+					<td><a href="search.php?q={$disk.diskid}&amp;fields=diskid&amp;nowild=1">{$disk.diskid}</a></td>
+					{if $config.multiuser}
+					<td>{$disk.owner}</td>
+					{/if}
+					<td>
+						<a href="show.php?id={$disk.id}">{$disk.title}</a>
+						{if $disk.count > 1} ... {/if}
+					</td>
+					<td>{$disk.who}</td>
+					<td>{$disk.dt}</td>
+					<td>
+						{if $disk.editable}
+						<form action="borrow.php" method="get">
+							<input type="hidden" name="diskid" value="{$disk.diskid}" />
+							<input type="hidden" name="return" value="1" />
+							<input type="submit" class="button small" value="{$lang.returned}" />
+						</form>
+						{/if}
+					</td>
+				</tr>
+				{/foreach}
+			</tbody>
+		</table>
+
+		{else}
+		<div class="alert-box">
+			{$lang.l_nothing}
+		</div>
+		{/if}
+
+	</div><!-- col -->
+</div><!-- row -->