docs: mark FD-M07 complete

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Jonathan D.A. Jewell

docs/MOSCOW-REQUIREMENTS.adoc

@@ -43,7 +43,7 @@ This document defines Must/Should/Could requirements for each component of the d
 
 |FD-M07
 |Basic Tauri GUI shell
-|🔲 Pending
+|✅ Done
 
 |FD-M08
 |Format tabs component (ReScript)