release: bump to 1.0.1, enable R8 minification, ignore .claude dir

versionCode 1->2, versionName 0.1.0->1.0.1
isMinifyEnabled=true with proguard-android-optimize.txt
add proguard-rules.pro (keep Room, OkHttp, kotlinx.serialization)
gitignore: add .claude/ to suppress worktree noise

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

android/app/proguard-rules.pro

@@ -0,0 +1,16 @@
+# Keep Room entities and DAOs
+-keep class me.hgsky.synq.data.db.** { *; }
+
+# Keep Retrofit/OkHttp
+-dontwarn okhttp3.**
+-keep class okhttp3.** { *; }
+
+# Keep kotlinx.serialization
+-keepattributes *Annotation*, InnerClasses
+-dontnote kotlinx.serialization.AnnotationsKt
+-keepclassmembers class kotlinx.serialization.json.** { *** Companion; }
+-keepclasseswithmembers class **$$serializer { *; }
+-keepclassmembers @kotlinx.serialization.Serializable class ** {
+    *** Companion;
+    *** serializer(...);
+}