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/src/format/parse/code/frames.rs

@@ -11,7 +11,7 @@ use super::super::pool::class_name;
 use crate::error::ClassfileError;
 use crate::format::{StackMapFrame, VerificationType};
 
-/// Backend frames → ours (index deltas — as-is).
+/// Backend frames → ours (index deltas - as-is).
 pub(super) fn to_frames(
     frames: &[StackFrame],
     pool: &ConstantPool<'_>,
@@ -100,7 +100,7 @@ fn vtype(value: &RtType, pool: &ConstantPool<'_>) -> Result<VerificationType, Cl
     })
 }
 
-/// The catch type (`0` — catch-all for `finally`/`any`).
+/// The catch type (`0` - catch-all for `finally`/`any`).
 pub(super) fn catch_type(
     pool: &ConstantPool<'_>,
     index: u16,

crates/noxis-classfile/src/format/parse/code/labels.rs

@@ -1,6 +1,6 @@
 //! Method-body labels: where they must stand and how they resolve.
 //!
-//! The backend numbers instructions in order — labels are placed directly on the
+//! The backend numbers instructions in order - labels are placed directly on the
 //! numbers, without byte offsets.
 
 use std::collections::{BTreeMap, BTreeSet};
@@ -13,7 +13,7 @@ use crate::insn::Label;
 
 /// Instruction numbers that must carry a label.
 ///
-/// `extra` — debug-table positions (already as numbers): pass insertions must
+/// `extra` - debug-table positions (already as numbers): pass insertions must
 /// not leave them without a label.
 pub(super) fn label_indexes(
     code: &[Instruction],

crates/noxis-classfile/src/format/parse/code/mod.rs

@@ -1,6 +1,6 @@
 //! Backend `Code` → our IR method body: labels, exceptions, frames.
 //!
-//! The backend already turned byte offsets into instruction indices — the
+//! The backend already turned byte offsets into instruction indices - the
 //! converters work directly with them: labels are placed on branch targets,
 //! try-block boundaries and debug-table positions; frames are carried over as-is
 //! (index deltas). `LineNumberTable`/`LocalVariableTable` positions are labels