v2.0 — 31 C POC twins + harness fixes

- 31 C POC files, one per CVE folder: full seed construction + trigger +
  main(), self-contained, no app dependency. All compile clean with
  clang -O2 -Wall (zero warnings) on macOS arm64; each has a recorded
  oracle on this host.
- CMGetDMVersionLevelFromRPU ABI pinned by disassembly: macOS export is
  (CFDataRef), the Swift POC drives the 4-arg iOS surface — this is the
  mechanism behind the cm.rpu death oracle on the simulator build.
- Harness fixes: glyphCount guard, MachOInspector size guard, ModTools
  clamp, DeviceModel iPhone19,7, GPTPayload clamps, Gate patch display.
- POC comments rewritten English-only (31 swift + arc.rr + 5 py).
- README (en/zh): C twin column, .c anatomy section, compile/run
  examples, C oracle verification status.
- Dead if-let binding removed from Identity summary; v2.0 build 3.

CVE-2026-112683/CVE-2026-112683.swift

@@ -1,24 +1,9 @@
-// font.cff · FontParser · charstring 解释器 · CVE-2026-112683
-// 原语: OOB 写 · 进程内 · tier 2
-// Primitive: OOB write · in-process · tier 2
-//
-// [zh] CFF Type2 charstring 操作数栈溢出
-// Type2 charstring 解释器的操作数栈为固定 48 项数组。27.0 仅在 pop 路径检查计数，push 路径不做检查。27.2 补入 Push/Pop 两道栈保护，并将扫描暂存区的
-// 32 位乘法改为 64 位，同时修正了符号扩展指针。
-//
-// [en] CFF Type2 charstring operand stack overflow
-// The Type2 charstring interpreter's operand stack is a fixed 48-entry array. On 27.0 only the pop
-// path checks the count; the push path does not. iOS 27.2 adds Push/Pop stack guards, widens the
-// scan scratch area's 32-bit multiply to 64-bit, and fixes a sign-extended pointer.
-// ── 判别 / oracle ──
-// 这个种子是一个裸 CFF：单个 charstring 连推 300 个操作数再 endchar。绘制字形才会真正执行解释器。
-//
-// 种子构建器（python，可直接运行）: CVE-2026-112683/CVE-2026-112683.py
-// runnable python seed builder: CVE-2026-112683/CVE-2026-112683.py
-
+// font.cff · FontParser · charstring interpreter · CVE-2026-112683
+// CFF Type2 charstring operand stack overflow
+// Standalone builder: CVE-2026-112683.py
 import Foundation
 
-// ── byte helpers — verbatim from Cinder27 Sources/Kit.swift ──
+// ── byte helpers (from Cinder27 Sources/Kit.swift) ──
 enum B {
     static func be16(_ v: UInt16) -> [UInt8] { [UInt8(v >> 8 & 0xff), UInt8(v & 0xff)] }
     static func le16(_ v: UInt16) -> [UInt8] { [UInt8(v & 0xff), UInt8(v >> 8 & 0xff)] }
@@ -40,4 +25,3 @@ enum B {
 }
 
 
-