v1.0.3: Fix TipTap JSON content conversion for editor display

- Replace all TypeToken usage with JsonParser/gson.fromJson (fixes R8/ProGuard crash)
- Add parseJsonArray/parseJsonObject helpers for API response parsing
- Fix contentToMarkdown to properly convert TipTap JSON objects to Markdown
  using tiptapToMarkdown instead of returning raw JSON
- Fix API endpoints to handle unwrapped response formats
- Add ProGuard rules for Gson TypeToken preservation
- Redirect build dir to /tmp for Samba compatibility

app/build.gradle.kts

@@ -20,8 +20,8 @@ android {
         applicationId = "com.docmost.app"
         minSdk = 26
         targetSdk = 34
-        versionCode = 2
-        versionName = "1.0.1"
+        versionCode = 4
+        versionName = "1.0.3"
     }
 
     signingConfigs {