feat(client): capture harness redesigned for the stepped Atlas — (body, rung) goldens (T-1157)

_setup_atlas_golden_shot and _run_atlas_matrix rebuilt on the real D-255
surface: nav.push('regional') through AtlasApp's own body-selection tail,
then StepCanvasViewer.jump_to at a fixed center (inventory item 5) — no
shim over the retired continuous-zoom API. is_pending()-aware bounded
settle (mirroring atlas_agent_driver.gd) and view-transform logging
(inventory item 3) wired into both capture paths. The 12 z2_0/z4_0/zfit
goldens are replaced by 12 (body, rung) goldens captured live against
fresh --test-mode servers; atlas_shots.json/visual.json re-keyed;
atlas_gen_open's stale gen_l1_* overlay ids fixed to gen_dw_temp.

Verification: two consecutive District runs byte-identical, and a
cold-vs-warm disk-cache invariance proof on both terrain draw branches
(Global/NEAREST, District/LINEAR) — byte-identical either way, so
capture output does not depend on the shared user://atlas_cache state.
DEVOPS.md's real-rendering exception note now records the fold-target
mapping for the smoke file T-1182 already deleted (Global + District
goldens exercise its two real-pixel draw branches). Old legacy-tracked
.import sidecars go with their PNGs; new goldens ship bare per
.gitignore's client/**/*.import rule.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/visual.json

@@ -4,7 +4,7 @@
   "tolerance": 5,
   "max_diff_pct": 0.5,
   "golden_dir": "client/tests/golden/visual",
-  "_comment_atlas_goldens": "T-1120 provenance (PR #180 review, Tyre): the 12 atlas_* golden scenarios were captured AND verified (exact pixel match) on danoontje's Mesa/AMD stack. T-1121 documents that goldens do NOT port across boxes at the current tolerance (the 19 pre-existing goldens fail 12-14% on this same box) — an atlas_* golden failing on a DIFFERENT machine is expected baseline drift, not a regression, until T-1121 resolves the canonical-capture-box question.",
+  "_comment_atlas_goldens": "T-1157 (D-255 rewrite of the T-1120 matrix, PR #180 provenance carried forward, Tyre): the atlas_* golden scenarios below key on (body, rung) per the stepped Atlas ladder, captured AND verified (exact pixel match) on danoontje's Mesa/AMD stack. T-1121 documents that goldens do NOT port across boxes at the current tolerance (the 19 pre-existing goldens fail 12-14% on this same box) — an atlas_* golden failing on a DIFFERENT machine is expected baseline drift, not a regression, until T-1121 resolves the canonical-capture-box question.",
   "scenarios": {
     "fog_3state": {
       "ticks": 5,
@@ -76,7 +76,7 @@
     },
     "atlas_gen_open": {
       "ticks": 240,
-      "description": "Live: real atlas opener (HudGroups) + GJ71c Layer-1 overlays (#960)"
+      "description": "Live: real atlas opener (HudGroups) + GJ71c region-ramp overlay (#960, D-255 rewrite)"
     },
     "locomotion_idle_live": {
       "ticks": 90,
@@ -91,65 +91,70 @@
       "env": { "SR_AUTOPILOT": "stance_up,south:6.0" },
       "description": "Live 3D sandbox: autopilot walks south into a wall — cutaway stub golden (T-1088)"
     },
-    "atlas_GJ380c_zfit_C": {
+    "atlas_GJ380c_Global": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Lendel (GJ380c), fit zoom, overlay set C (district+settlements+roads+rivers)"
+      "description": "T-1157 curated Atlas golden (D-255): Lendel (GJ380c), Global rung (rung 0), temperature overlay"
     },
-    "atlas_GJ380c_z4_0_B": {
+    "atlas_GJ380c_Region": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Lendel (GJ380c), 4.0 zoom, overlay set B (settlements+roads)"
+      "description": "T-1157 curated Atlas golden (D-255): Lendel (GJ380c), Region rung, moisture overlay"
     },
-    "atlas_GJ144e_zfit_A": {
+    "atlas_GJ380c_District": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Vethis (GJ144e), fit zoom, overlay set A (district only)"
+      "description": "T-1157 curated Atlas golden (D-255): Lendel (GJ380c), District rung, no overlay"
     },
-    "atlas_GJ144e_z2_0_C": {
+    "atlas_GJ144e_Global": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Vethis (GJ144e), 2.0 zoom (labels on), overlay set C"
+      "description": "T-1157 curated Atlas golden (D-255): Vethis (GJ144e), Global rung, no overlay"
     },
-    "atlas_GJ338Bd_z2_0_C": {
+    "atlas_GJ144e_Quarter": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Arbour (GJ338Bd), 2.0 zoom (labels on), overlay set C"
+      "description": "T-1157 curated Atlas golden (D-255): Vethis (GJ144e), Quarter rung, vegetation overlay"
     },
-    "atlas_GJ338Bd_z4_0_B": {
+    "atlas_GJ338Bd_Global": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Arbour (GJ338Bd), 4.0 zoom, overlay set B"
+      "description": "T-1157 curated Atlas golden (D-255): Arbour (GJ338Bd), Global rung, moisture overlay"
     },
-    "atlas_GJ820Bc_zfit_A": {
+    "atlas_GJ338Bd_Block": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Ferrath (GJ820Bc), fit zoom, overlay set A (district only)"
+      "description": "T-1157 curated Atlas golden (D-255): Arbour (GJ338Bd), Block rung, no overlay"
     },
-    "atlas_GJ820Bc_z2_0_C": {
+    "atlas_GJ820Bc_Global": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Ferrath (GJ820Bc), 2.0 zoom (labels on), overlay set C"
+      "description": "T-1157 curated Atlas golden (D-255): Ferrath (GJ820Bc), Global rung, no overlay"
     },
-    "atlas_GJ251c_z2_0_B": {
+    "atlas_GJ820Bc_District": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Ruhr (GJ251c), 2.0 zoom (labels on), overlay set B (settlements+roads)"
+      "description": "T-1157 curated Atlas golden (D-255): Ferrath (GJ820Bc), District rung, temperature overlay"
     },
-    "atlas_GJ251c_zfit_C": {
+    "atlas_GJ251c_Global": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Ruhr (GJ251c), fit zoom, overlay set C — highest-population body in the sample"
+      "description": "T-1157 curated Atlas golden (D-255): Ruhr (GJ251c), Global rung, vegetation overlay — highest-population body in the sample"
     },
-    "atlas_GJ244Ad_zfit_C": {
+    "atlas_GJ251c_Region": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Edict (GJ244Ad), fit zoom, overlay set C — frozen planet_class pick"
+      "description": "T-1157 curated Atlas golden (D-255): Ruhr (GJ251c), Region rung, no overlay"
     },
-    "atlas_GJ445c-m1_z4_0_B": {
+    "atlas_GJ244Ad_Global": {
       "ticks": 240,
       "live": true,
-      "description": "T-1120 curated Atlas golden: Jinghu (GJ445c-m1), 4.0 zoom, overlay set B — inhabited moon pick"
+      "description": "T-1157 curated Atlas golden (D-255): Edict (GJ244Ad), Global rung, temperature overlay — frozen planet_class pick"
+    },
+    "atlas_GJ445c-m1_Chunk": {
+      "ticks": 240,
+      "live": true,
+      "description": "T-1157 curated Atlas golden (D-255): Jinghu (GJ445c-m1), Chunk rung (deepest), no overlay — inhabited moon pick"
     }
   },
   "flows": {