frames,jar,passes: verifier-driven hardening from real jars

Proven by paranoid runs over lorep (17 classes, fully green),
LoVisual (4081 classes) and oc2r (1278 classes) with per-class
java -Xverify:all, each fix first reproduced as a red test:

- merge: Top absorbs instead of Top-wins (javac declares Top for
  slots unwritten on some inflow; precise types reject those edges).
  Regression: loop_head_keeps_top_for_loop_local.
- emit: collapse [Long|Double, Top] pairs on operand stacks
  (javac writes one entry; the pair is rejected). Regression:
  wide_stack_join_emits_single_entries.
- xfer ArrayLoad: push the wide pair, fixing lcmp underflow.
  Regression: array_load_wide_pushes_pair.
- xfer <init>: convert only the receiver's own allocation site
  instead of every Uninitialized (nested construction clobbered
  the outer object). Regression: nested_construction_keeps_outer.
- xfer ANewArray: array operands gain one dimension ([B] -> [[B)
  instead of an illegal L-wrap ([L[B;). Covered by the same test.
- jar load: duplicate class names (multi-release module-info
  twins) keep the first occurrence instead of crashing save.
  Test: duplicate_class_names_keep_first.
- strings/constants: skip methods past MAX_METHOD_INSNS (8000)
  so giants cannot overflow the 64KB writer ceiling. Tests:
  oversized_methods_are_skipped in both passes.
- merge errors now name both types being merged.

Also: em-dash removed repo-wide (724 spots, rule added to
todo.md), allow-lints only in tests (scratch example deleted),
code comments migrated to English in every file this change
touches.

crates/noxis-classfile/tests/frames.rs

@@ -3,7 +3,7 @@
 //! Frames are dropped and recomputed. Judges: determinism + IR round-trip +
 //! real `java -Xverify:all` for classes without external dependencies.
 //! (The backend's `verify_class` is unfit for acceptance: it expects frames
-//! in bytes while `from_bytes` hands out indices — see `todo.md`.)
+//! in bytes while `from_bytes` hands out indices - see `todo.md`.)
 
 #![allow(clippy::expect_used, clippy::unwrap_used)]
 
@@ -28,7 +28,7 @@ impl Hierarchy for MapHierarchy {
     }
 }
 
-/// JDK-only classes — `java` checks them fully.
+/// JDK-only classes - `java` checks them fully.
 const JDK_ONLY: [&str; 2] = [
     "dev/loki/lorep/util/TimeUtil",
     "dev/loki/lorep/util/PaginationUtil",
@@ -95,7 +95,7 @@ fn fixtures_recompute_and_verify() {
 /// A join with a `double` below on the stack must emit it as ONE entry.
 ///
 /// Regression: the emitter used to write the slot pair (`[Double, Top]`),
-/// like `javac` does for locals — but on the operand stack `javac` writes a
+/// like `javac` does for locals - but on the operand stack `javac` writes a
 /// bare `[Double]`, and HotSpot rejects the pair with
 /// `Inconsistent stackmap frames`.
 #[test]