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

settings.gradle.kts

@@ -14,3 +14,12 @@ dependencyResolutionManagement {
 
 rootProject.name = "Docmost"
 include(":app")
+
+val localBuildDir = "/tmp/android-build/Docmost"
+
+gradle.projectsLoaded {
+    rootProject.layout.buildDirectory.set(file(localBuildDir))
+    rootProject.subprojects.forEach { project ->
+        project.layout.buildDirectory.set(file("$localBuildDir/${project.name}"))
+    }
+}