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/modern/permissions.tpl

@@ -0,0 +1,64 @@
+{*
+  Template for the permission management screen
+  $Id: permissions.tpl,v 2.3 2005/05/27 13:53:43 chinamann Exp $
+*}
+
+<div id="content">
+
+
+{if $message}
+<table width="100%" cellpadding="0" cellspacing="0">
+<tr><td>
+    <table width="100%">
+    <tr>
+      <td class="center">
+        <br/>{$message}<br/>
+      </td>
+    </tr>
+    </table>
+</td></tr>
+</table>
+{else}
+    {include file="topspacer.tpl"}
+{/if}
+<form action="permissions.php" method="post">
+<table width="100%">
+<tr><td align="center">
+    <h3>{$lang.permforuser} {html_options name=from_uid options=$owners selected=$from_uid onchange="submit()"}:</h3>
+</td></tr>
+<tr><td class="center">
+<table width="100%">
+    <tr class="{cycle values="even,odd"}">
+        <th>{$lang.username}</th>
+        <th>{$lang.read}</th>
+        <th>{$lang.write}</th>
+    </tr>
+
+    {foreach item=perm from=$permlist}
+      <input type="hidden" name="newflag_{$perm.to_uid}" id="newflag_{$perm.to_uid}" value="{$perm.newentry}" />
+      <tr class="{cycle values="even,odd"}">
+      <td class="center">
+        {$perm.to_name}
+      </td>
+      <td class="center">
+        <input type="checkbox" name="readflag_{$perm.to_uid}" id="readflag_{$perm.to_uid}" value="1" {if $perm.read}checked="checked"{/if}/>
+      </td>
+      <td class="center">
+        <input type="checkbox" name="writeflag_{$perm.to_uid}" id="writeflag_{$perm.to_uid}" value="1" {if $perm.write}checked="checked"{/if}/>
+      </td>
+      </tr>
+    {/foreach}
+    <tr>
+    <td class="center" colspan="4"><br/>
+      <input type="submit" name="save" value="{$lang.save}" class="button" accesskey="s" />
+      <input type="button" value="{$lang.back}" class="button" onclick="window.location.href='users.php';" accesskey="c" />
+    </td>
+    </tr>
+
+</table>
+</td>
+</tr>
+</table>
+</form>
+
+</div>