release: cut 0.2.2

Re-cut after 0.2.1's Codeberg publish failed (500 on pre-synced tag,
fixed in the previous commit). Validates the fix end to end and ships
the Codeberg direct-download channel (signed APK + SHA-256).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/build.gradle.kts

@@ -29,8 +29,8 @@ android {
         // release itself (versionCode is pinned to MAJOR*10000 + MINOR*100 +
         // PATCH from versionName, e.g. 0.2.0 -> 200). The Gitea release is marked
         // as a pre-release while MAJOR is 0. See docs/RELEASING.md.
-        versionCode = 201
-        versionName = "0.2.1"
+        versionCode = 202
+        versionName = "0.2.2"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }