`sx_query_safe_insets_jni`'s body — previously seven hand-rolled
`#jni_call` sites with verbose JNI descriptor literals — now uses
four `#jni_class` declarations and the DSL method-call form inside
a `#jni_env(env) { ... }` scope. The new shape:
```
WindowInsets :: #jni_class("android/view/WindowInsets") {
getSystemWindowInsetTop :: (self: *Self) -> s32;
...
}
... Activity / Window / View ...
#jni_env(env) {
window := activity.getWindow();
decor := window.getDecorView();
insets := decor.getRootWindowInsets();
top.* = insets.getSystemWindowInsetTop();
...
}
```
Descriptor derivation happens at lower time (jni_descriptor.zig);
slot interning + vtable dispatch shape match the Phase 1C hand-rolled
form byte-for-byte. The function param signature changes from
`activity: *void` to `activity: *Activity` so the DSL can resolve
method names through `foreign_class_map`; the AndroidPlatform.safe_insets
caller adds an `xx` cast at the call site.
Net body shrinks from 14 dispatch lines to 12 (slightly shorter but
the win is type safety + readability — the foreign descriptor
strings are gone). On-device chess regression is the remaining
verification step (Pixel device with safe-area-driven board layout).
Verified locally: zig build, run_examples (129/129), cross_compile
(3/3 — incl. examples/99-android-egl-clear.sx cross-compile to
android target succeeds and produces a valid .o).
Naming caveat: `Activity` / `Window` / `View` / `WindowInsets` are
now top-level names exported by `modules/platform/android.sx`. User
code that imports this module shouldn't redefine these aliases.
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