Remaster 37 classic terrain pictures and refresh portable package

docs/hd-backlog.md

@@ -1,6 +1,12 @@
 # Original artwork HD backlog
 
-Current artwork/runtime checkpoint — 17 October 2026: the registered and assembled pack contains **5,426 frames / 3,588 complete sequences**, including **4,301 Terrain pictures**. **327 originals await approval**: 234 Terrain, 59 enemies/ground objects, 33 UI/other and one boss; remaining includes held drafts and actual refusals. This single append admits only historical `2039c`, using the untouched earlier `1f240a2f` raw (2,904,333 bytes), native32/origin0/crop[941,941,313,313], with the SourceE `original-painted-ordinary-v1` runtime palette treatment. It is not new image generation. Exactly one installed frame now opts in. Different actual SourceE all1–4 material and one genuine S2W4r8c7 whole3×3 neighborhood are qualified (`05da73dd`/`1877c853`); the muted brown remains darker/finer-grained, with a visible texture/value island at3–4. The latest corrective `4b6b` and its other15 HOLDs remain held. Prior registered20391–94 retain actualC QA and2039a retains actualB QA: those five are unchanged carry, not new SourceE measurements. All old5,425 bindings and3,587-header/provenance prefix remain exact. Actual data is **9,370 files / 8,270,452,494 bytes**; CLI validates5,426/zero rejects and45mods/one override (`872b875a`). SourceE18, both binaries and the341-file/45-mod/M2v1.0.2 guard remain unchanged. The prior H5425 SourceE activation record remains dated zero-opt-in evidence; [current runtime evidence](hd-runtime-release.json) selects the distinct5426 successor. All three actual1920×1080/HD4x SDL controls exited0 and measured identical PNG/RGB/alpha to actual SourceE H5425 over6,220,800 pixels. Root personally viewed all three complete images. Equality was measured, not a runner requirement; these controls establish no specific2039c visibility or palette-mode art approval. Latest closed native Windows is SourceC H5425/`4ab5f799`,379passed/26ignored/zero failed; SourceE/`68669fc6` CI is in progress at this checkpoint, and no H5426 native Windows execution is claimed. This appendix does not approve the whole16, general placements or seamless material. All earlier artwork, qualification, HOLD and refusal authorities retain their original epochs; H5426 publication is pending at this document freeze.
+Current artwork/runtime checkpoint — 18 October 2026: the bundled pack contains **5,463 reviewed frames in 3,625 complete sequences**, including **4,338 Terrain pictures**. **290 original pictures still await approval**: 197 Terrain, 59 enemies and ground objects, 33 UI/other pictures and one boss. Remaining pictures include held drafts and actual provider refusals.
+
+This update adds 37 Terrain pictures in four reviewed groups: all 16 pictures from `40425–40434`; five selected pictures (`2038d`, `2038e`, `20396`, `20397`, `20398`); both `2058b–2058c`; and 14 static pictures from `40365–40374`, excluding `40372` and `40374`. They use untouched older PNGs rather than newly generated artwork. Eight installed pictures now use the optional palette constraint. The static selection does not split an animation; the earlier whole-group holds and the new `40374` provider refusal remain recorded.
+
+Validation accepts all 5,463 frames with zero rejects, plus 45 mods with one override. Three 1920×1080 SDL controls completed successfully, and Root viewed each full image. Their PNG, RGB and alpha results matched the H5426 controls across 6,220,800 pixels, with zero measured changes. These controls do not establish visibility of all 37 additions or coverage of every optional policy. The SourceE runtime and current Iron Coast resources, including Mission 2 version 1.0.2, are unchanged. The latest closed native Windows check is for H5426 at `3f3107d6`: 394 tests passed, 26 were ignored and none failed. A native Windows result for this new artwork revision is not claimed.
+
+The [completion ledger](hd-completion.json) records the exact asset lists, review authorities and remaining material or placement limits. Existing historical records remain unchanged; these finite reviews do not establish seamless terrain, every placement or complete HD coverage. Validated package checkpoint; Git history records publication.
 
 Preserved 17 October 2026 Source-update checkpoint at 5,384 (historical coverage): Current Source C+D runtime — 17 October 2026, published `a073f73f`: HD coverage remains **5,384 frames / 3,551 sequences**, with **369 originals remaining** (260 Terrain, 75 enemies/ground objects, 33 UI/other, one boss). Both executables are rebuilt; 90 Rust / 78 Python tests, HD validation and three exact 1080p regression controls pass. Five old Rust checks remain ignored. Source C+D native Windows CI is pending; the prior `58723547` result (361 passed / 26 ignored / zero failed) is a different epoch. Earlier material, context and QA records below remain historical; this source update adds no art approval.
 
@@ -52,7 +58,7 @@ The published 3,592-frame admission adds **427 source/material-qualified origina
 | Player and enemy projectiles | 51 | 51 | 0 | 18 |
 | Explosions and effects | 281 | 281 | 0 | 25 |
 | Equipment and pickups | 47 | 47 | 0 | 23 |
-| Terrain | 4,535 | 4,301 | 234 | 4 |
+| Terrain | 4,535 | 4,338 | 197 | 4 |
 | Menus, portraits, HUD and other pictures | 150 | 117 | 33 | mixed static / animated |
 
 The completion ledger retains `format_version: 1` with `ledger_schema: family_review_refs_v1`. Each approved asset uses a stable `coordinator_review_ref`; `family_reviews` stores the candidate/binding identities and exact full immutable external receipt once. The original 2,132 normalization reduced 53,594,880 bytes to 8,406,611 (84.31%) without changing approval or artwork. New registrations update only their own status/evidence; native preservation has a separate closed record.