docs: refine static reading experience

docs/src/index.md

@@ -1,13 +1,13 @@
-# Kaptan documentation
+# Overview
 
 Kaptan is an embedded Rust flight-controller project. This manual is the
 single source of project documentation: board support, safety boundaries,
 simulation, development workflow, and design references live here as
 Markdown.
 
-The checked-in firmware is telemetry-only. It does not expose physical motor
-authority, and no document in this site should be read as a physical-flight
-release claim.
+> **Status:** the checked-in firmware is telemetry-only. It does not expose
+> physical motor authority, and this site does not make a physical-flight
+> release claim.
 
 ## Index