Bump version to 0.3.1

V14 family stays unchanged from 0.3.0 production. New in 0.3.1:
- InMotion P6 fully supported (telemetry, settings, light/horn/lock/mode)
- V12 HS / HT / Pro support via the multi-wheel adapter
- Virtual wheel simulator for debug builds (V14 + P6)
- Phone+watch APKs share the same versionName so users can pair
  without confusion

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: eried

app/build.gradle.kts

@@ -27,8 +27,8 @@ android {
         applicationId = "com.eried.eucplanet"
         minSdk = 29
         targetSdk = 35
-        versionCode = 7
-        versionName = "0.3.0"
+        versionCode = 8
+        versionName = "0.3.1"
 
         val buildStamp = SimpleDateFormat("yyMMdd.HHmm")
             .apply { timeZone = TimeZone.getTimeZone("UTC") }

wear/build.gradle.kts

@@ -12,8 +12,8 @@ android {
         applicationId = "com.eried.eucplanet"
         minSdk = 30
         targetSdk = 35
-        versionCode = 7
-        versionName = "0.3.0"
+        versionCode = 8
+        versionName = "0.3.1"
     }
 
     buildTypes {