Redirect legacy page names to the new routes (v0.9.4)

The retired legacy instance now blanket-redirects its old host to the new
one, so pre-rewrite deep links like /index.html or /branches.html arrive
here — they answer 301 to the new routes instead of 404; about/license had
no successor pages and land on the start page.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

build.gradle.kts

@@ -11,7 +11,7 @@ plugins {
 group = "de.hoennig"
 // bump at least the patch version for every deployment, so the UI footer
 // (BuildProperties) and --version identify what is actually running
-version = "0.9.3"
+version = "0.9.4"
 
 java {
     toolchain {