Remaster 23 classic terrain and structure pictures

Add reviewed native terrain artwork, preserve original detail where required, and validate versioned carried Terrain identities. Bundle the 5407-frame pack for Linux and Windows and record current validation results.

docs/hd-backlog.md

@@ -1,6 +1,10 @@
 # Original artwork HD backlog
 
-The external and assembled shared runtime pack contains **5,384 reviewed original picture frames / 3,551 complete sequences**, including **4,275 Terrain pictures**. **369 of 5,753 original pictures remain**: 260 Terrain, 75 enemies/ground objects, 33 UI/other and one boss. This six-frame append adds Boss 200ba, Terrain 2039a and the complete four-frame TANK03G3 family 3007c–3007f in three native sequences / three unchanged raw PNGs. Five hybrid frames explicitly retain 207 Original logical cells: 11 in 200ba and 50/48/49/49 across Tank phases; those cells are not generated HD. All previous 5,378 bindings and the full 3,548-header prefix remain exact, including canvas, origin, crop and optional-field presence. The assembled data contains **9,335 files / 8,179,315,857 bytes**. Actual CLI validates all 5,384 frames with zero rejects and 45 mods/one override (`2f3ab585`). Source18 and both binaries remain unchanged at API-B; future Source-C work is not the current runtime. Different reviews cover one genuine 200ba pose, all four naturally observed Tank phases and exactly two 2039a contexts; no all-placement or seamless-road claim follows. Visible 2039a edge and texture steps remain qualified, and the other 14 road tiles remain held. Previous 5,378 publication is remote-confirmed at `9ba0a5c7`. Native Windows 5,341 passed 360 tests with zero failures and 26 ignored; the separate campaign c4a4 run's old-test failure is preserved, while the 58723547 correction's native Windows workflow is still packaging. Publication and native Windows execution for 5,384 remain pending. Neither Windows result is relabeled as 5,378/5,384 execution; full HD completion remains open.
+Current artwork/runtime checkpoint — 17 October 2026: the registered and assembled pack contains **5,407 frames / 3,574 complete sequences**, including **4,298 Terrain pictures**. **346 originals remain**: 237 Terrain, 75 enemies/ground objects, 33 UI/other and one boss. Remaining means not approved for HD registration, including held drafts and actual refusals, rather than never generated. The 23 Terrain additions are complete native singletons 40435–40444, 20391–20394, 2057d, 20585 and 20586 across six jobs. Their 21 raw routes comprise 20 copied new payloads and one exact alias of existing 9ce; four hybrid frames retain 118 declared Original logical cells, which are not generated HD. All prior 5,384 bindings and 3,551 full headers remain exact. Actual data contains **9,356 files / 8,245,392,052 bytes**; Root's CLI validates 5,407 frames with zero rejects and 45 mods/one override (`8c9f3893`). Source18 and both executables remain Source C+D from published `a073f73f`, distinct from API-B. Saved context reviews cover 128 current-C cases for 40435–40444 plus 17 ordered pairs, three road contexts and seven hardware contexts (three carried/four changed); 40440 is unused/gallery-only. All six directed cross-group Source intersections are empty within those saved 128/3/7 inputs. This does not establish seamlessness, all placements or full-HD completion. Three actual 5,407 SDL controls at 1080p/HD4x match frozen C5,384 exactly across 6,220,800 RGB/alpha pixels; these controls contain none of the new 23 frames. Source-C native Windows at `a073f73f` passed 379 tests with 26 ignored and zero failures; prior API-B 5,384 evidence (361 passed/26 ignored/zero failed) is separate. The 5,407 Git publication and native Windows execution remain pending. The following 5,384 source-update and older art observations remain dated history.
+
+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.
+
+Preserved pre-Source-C document-freeze observation: The external and assembled shared runtime pack contains **5,384 reviewed original picture frames / 3,551 complete sequences**, including **4,275 Terrain pictures**. **369 of 5,753 original pictures remain**: 260 Terrain, 75 enemies/ground objects, 33 UI/other and one boss. This six-frame append adds Boss 200ba, Terrain 2039a and the complete four-frame TANK03G3 family 3007c–3007f in three native sequences / three unchanged raw PNGs. Five hybrid frames explicitly retain 207 Original logical cells: 11 in 200ba and 50/48/49/49 across Tank phases; those cells are not generated HD. All previous 5,378 bindings and the full 3,548-header prefix remain exact, including canvas, origin, crop and optional-field presence. The assembled data contains **9,335 files / 8,179,315,857 bytes**. Actual CLI validates all 5,384 frames with zero rejects and 45 mods/one override (`2f3ab585`). Source18 and both binaries remain unchanged at API-B; future Source-C work is not the current runtime. Different reviews cover one genuine 200ba pose, all four naturally observed Tank phases and exactly two 2039a contexts; no all-placement or seamless-road claim follows. Visible 2039a edge and texture steps remain qualified, and the other 14 road tiles remain held. Previous 5,378 publication is remote-confirmed at `9ba0a5c7`. Native Windows 5,341 passed 360 tests with zero failures and 26 ignored; the separate campaign c4a4 run's old-test failure is preserved, while the 58723547 correction's native Windows workflow is still packaging. Publication and native Windows execution for 5,384 remain pending. Neither Windows result is relabeled as 5,378/5,384 execution; full HD completion remains open.
 
 Preserved earlier 17 October 2026 document-freeze observation: The external and assembled shared runtime pack contains **5,378 reviewed original picture frames / 3,548 complete sequences**, including **4,274 Terrain pictures**. **375 of 5,753 original pictures remain**: 261 Terrain, 79 enemies/ground objects, 33 UI/other and two bosses. The 37 additions comprise 30 selected Terrain pictures, Terrain 20583, UI/other 3009f and 300a4, and the complete four-frame DSHP21G3 family 300a8–300ab. Seven hybrid frames explicitly retain 37 Original logical cells; those cells are not generated HD. All previous 5,341 bindings and the full 3,514-header prefix remain exact, as do native canvases, origins, crops and optional-field presence. The assembled data contains **9,332 files / 8,171,723,875 bytes**. Actual CLI validation passes all 5,378 frames with zero rejects and 45 mods/one override (`e1cb3b4a`). Source18 and both bundled binaries remain unchanged at API-B. Historical386e artwork/context measurements retain their own epoch. The 15 road tiles remain held; pending 200ba, further Tank work and the new 2039a context are outside this append. Git publication and native Windows execution for 5,378 remain pending; the 5,341 Windows workflow is still packaging at this freeze. No complete-HD claim is made.
 
@@ -48,7 +52,7 @@ 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 | 4,275 | 260 | 4 |
+| Terrain | 4,535 | 4,298 | 237 | 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.