fix: set dev SHA-256 and bump VERSION header to 03.10.18

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

updates.xml

@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='UTF-8'?>
 <!-- Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
  SPDX-License-Identifier: GPL-3.0-or-later
- VERSION: 03.10.17
+ VERSION: 03.10.18
  -->
 
 <updates>
@@ -19,7 +19,7 @@
     <downloads>
       <downloadurl type='full' format='zip'>https://git.mokoconsulting.tech/MokoConsulting/MokoCassiopeia/releases/download/development/mokocassiopeia-03.10.18-dev.zip</downloadurl>
     </downloads>
-    <sha256></sha256>
+    <sha256>9a13590dfadf18203652f82645fc9aed5c3a806b77da92317202cd6eda4e0da8</sha256>
     <tags><tag>development</tag></tags>
     <maintainer>Moko Consulting</maintainer>
     <maintainerurl>https://mokoconsulting.tech</maintainerurl>