chore(release): cut 2.14.1

Move the Unreleased fixes (#47, #48, #49, #22) under a 2.14.1 heading, bump
versionName/versionCode to 2.14.1/21401, and sync the F-Droid per-version
changelog.

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

app/build.gradle.kts

@@ -28,8 +28,8 @@ android {
         // which builds this version and then creates the matching vX.Y.Z tag +
         // release itself (versionCode is pinned to MAJOR*10000 + MINOR*100 +
         // PATCH from versionName, e.g. 2.7.2 -> 20702). See docs/RELEASING.md.
-        versionCode = 21400
-        versionName = "2.14.0"
+        versionCode = 21401
+        versionName = "2.14.1"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }