`src/ir/jni_java_emit.zig`'s `emitJavaSource` takes a
`ForeignClassDecl` with `is_main = true` and returns the `.java`
source text. AOT pipeline integration (javac + d8 + APK bundling +
manifest synthesis + RegisterNatives) lands in subsequent slices.
Emission shape per bodied method:
@Override
public <ret> <name>(<params>) {
super.<name>(<args>);
sx_<name>(<args>);
}
private native <ret> sx_<name>(<params>);
Declaration-only methods (no body — references inherited Java
methods that sx wants to *call*) are skipped — no override, no
native delegate.
`#extends Alias` resolves through the supplied class registry to
the parent's foreign Java path. Default parent is
`android.app.NativeActivity` when `#extends` is absent.
Type matrix: primitives (void/bool/s8..s64/u8/u16/f32/f64), `*Self`
elided as the receiver (Java's implicit `this`), `*void` as
`Object`, `*Foo` cross-class refs resolved through the class
registry.
Six unit tests cover: non-main rejection, full void onCreate(Bundle)
shape with @Override delegate, primitive params, declaration-only
skipping, `#extends Alias` resolution, default-package classes.
130/130 examples still green; zig test clean.
7ea7ad778e