fix: remove sensitive/local files from git and fix javadoc publish error

- Add CLAUDE.md, *.asc, squarescreen-android-sdk-spec.md to .gitignore
- Remove those files from git tracking
- Fix javadoc publish error: sever javaDocReleaseJar dependency on Dokka
  instead of reconfiguring publications (which caused module metadata conflicts)
- Revert configure(AndroidSingleVariantLibrary) calls — not needed

Author: FitzAfful

.gitignore

@@ -13,5 +13,12 @@ local.properties
 
 # API keys / secrets - never commit
 *.keystore
+*.asc
 keystore.properties
 signing.properties
+
+# Project-specific files not for version control
+squarescreen-android-sdk-spec.md
+
+# Claude Code project instructions (local only)
+CLAUDE.md

CLAUDE.md

@@ -31,17 +31,14 @@ subprojects {
                 }
             }
 
-            // Add an empty javadoc jar to every Maven publication for Maven Central compliance.
-            // Dokka is disabled due to an ASM9 incompatibility with sealed classes in dependency JARs.
-            // Maven Central explicitly supports empty javadoc jars for non-Java projects.
-            val emptyJavadocJar = tasks.maybeCreate("emptyJavadocJar", org.gradle.api.tasks.bundling.Jar::class.java).apply {
-                archiveClassifier.set("javadoc")
-            }
-            publications.withType(org.gradle.api.publish.maven.MavenPublication::class.java).configureEach {
-                if (artifacts.none { it.classifier == "javadoc" }) {
-                    artifact(emptyJavadocJar)
-                }
-            }
+        // Dokka crashes with "PermittedSubclasses requires ASM9" when reading sealed
+        // class bytecode from dependency JARs compiled with Java 17. Fix: sever the
+        // dependency between the javadoc Jar task and the Dokka generation task so
+        // the jar runs with no inputs and produces an empty (but valid) javadoc jar.
+        // Maven Central accepts empty javadoc jars for Android/Kotlin libraries.
+        tasks.matching { it.name == "javaDocReleaseJar" }.configureEach {
+            setDependsOn(listOf<Any>())
+        }
         }
     }
 }