feat(mapgen-studio): flat config accordion — full-bleed stage rows, recessed expansion slab + Y-wave system.md amendment and ledger

apps/mapgen-studio/.interface-design/system.md

@@ -252,9 +252,10 @@ supersedes the Pass-4 dock placement, keeps the console split + icon contract:
   geometry — regular pointy-top hexes on the odd-R row-offset lattice (the
   hex-convention audit proved `tile.hexOddQ` mislabels that grid; the model's
   column-offset projection is not a regular tiling, hence the "squished"
-  look it produced). Tile borders use ONE graphite ink (`#0d0d11`, α200) in
-  both themes — dark seams against the fills; never a mid-luminance color
-  that competes with the data palette. Unfilled tiles draw nothing.
+  look it produced). Border ink: see the Y-wave amendment below — the X6
+  constant-graphite ink (`#0d0d11`, α200) is superseded by the fill-derived
+  border rule (a page-colored seam dissolved the lattice into dots at fit
+  zoom). Unfilled tiles draw nothing (unchanged).
 
 ## DAG-tab amendment (2026-06-12, handoff-mandated): stage views
 
@@ -278,3 +279,42 @@ Decisions (see `openspec/changes/mapgen-studio-dag-tab/design.md`):
   view activation, staleTime ∞) — fetch on first activation, cached per
   recipe; pipeline selection/expansion live in `viewStore` as
   pipeline-prefixed fields, distinct from map-explore selection.
+
+## Y-wave amendment (2026-06-12, user-grounded): tile border rule, flat config accordion, selector drift
+
+- **The one tile-border RULE (supersedes X6's constant ink):** a tile's
+  border is its OWN fill pulled toward black (`fill × 0.55`, fully opaque) —
+  self-grout, owned by `tileBorderColorForFill` in `presentation.ts`. The X6
+  page-substrate constant was invisible between dark fills at fit zoom
+  (Huge-map tiles are a few pixels wide), dissolving the tessellation into
+  dots; a fill-derived seam is darker than its fill BY CONSTRUCTION, so the
+  lattice reads at every zoom, both themes, every palette — and still
+  recedes like etched grout up close. Unfilled tiles still draw nothing.
+- **Default layer preference: the map studio defaults to the MAP.** When
+  layer selection resets (step/stage switch, fresh manifest), prefer the
+  step's tile-space GRID layer over whichever layer the worker emitted
+  first (points/mesh). Owned by `useVizState`'s selection fallback.
+- **The graticule is CANVAS substrate, not layer furniture.** Once a
+  manifest exists, the background grid follows the user's grid toggle on
+  EVERY stage — kind-independent, including steps with no visible layers
+  (the canvas stays a ready survey field, never dead space); a layer may
+  opt out via `meta.showGrid: false`. The old points/segments-only gate
+  made the grid vanish on most stage switches. Pre-manifest, the
+  awaiting-matter overlay carries its own graticule.
+- **Flat config accordion (supersedes the Pass-3 stage CARD):** top-level
+  config objects lay flat on the panel — full-bleed disclosure rows,
+  hairline dividers (`divide-border-subtle`), zero inter-item margin, no
+  card chrome. Expanding opens a RECESSED slab (`bg-surface-sunken/60`,
+  hairline top) — the interaction reads as a door opening INTO the
+  graphite, never a card lifting off it. Group wells keep their one
+  machined-slot tier inside the slab; the Pass-3 4/8px field rhythm is
+  unchanged; the 12px inter-card step is retired.
+- **Selector drift affordance (categorical):** any selector that names a
+  source of truth (saved game config; world/map config) must SHOW when the
+  current state has drifted from that source — warning(orange) ring on the
+  control + a warning "Modified" pill whose click re-applies the source
+  (sync back). Drift for a saved game config = "re-applying the file would
+  change the state" (`studioSetupDriftsFromSavedConfig`): the file governs
+  the options it specifies + its player options; ungoverned keys never count
+  as drift. The game-setup dropdowns may never silently supersede a selected
+  saved config.

apps/mapgen-studio/src/features/configOverrides/rjsfTemplates.tsx

@@ -33,7 +33,6 @@ export type BrowserConfigFormContext = {
 // is gone. The theme now follows the single `.dark` class via design-system
 // tokens (`card`/`muted`/`border`/`accent`/…), so there is no `lightMode` read.
 const FORM = {
-  card: "bg-card border-border",
   // Group well: nesting is a surface, not an indent (Pass-3 config-surface
   // spec). One recess below the stage card — tinted toward the page token so
   // groups read as machined slots in the slate. `background` sits below `card`
@@ -56,12 +55,12 @@ const FORM = {
   groupHeading: "text-label font-semibold uppercase tracking-wider text-muted-foreground",
   subGroupHeading: "text-label font-semibold uppercase tracking-wider text-muted-foreground/70",
   // Rhythm on the 4px base (Pass-3): 4px inside a field block, 8px between
-  // sibling fields, 12px between groups/stage sections. Group wells carry
-  // `my-1`, which composes with the sibling gap to the 12px group step.
+  // sibling fields. Stage sections carry NO inter-item rhythm (Y4 flatten):
+  // the accordion is tight — hairline dividers separate rows, not margins.
+  // Group wells carry `my-1`, composing with the sibling gap inside a slab.
   rhythm: {
     field: "gap-1",
     siblings: "gap-2",
-    sections: "gap-3",
     groupPull: "my-1",
   },
 } as const;
@@ -207,8 +206,11 @@ export function BrowserConfigObjectFieldTemplate(
   const textClass = FORM.text;
 
   if (isRoot) {
+    // Y4 flatten: the stage list is a TIGHT accordion — flush rows separated
+    // by hairlines, no inter-card margins, no card chrome. Expansion is the
+    // only volume change (a recessed slab opens under the row).
     return (
-      <div className={`flex flex-col ${FORM.rhythm.sections}`}>
+      <div className={`flex flex-col divide-y divide-border-subtle border-y ${FORM.borderSubtle}`}>
         {properties.filter((p) => !p.hidden).map((p) => p.content)}
       </div>
     );
@@ -236,35 +238,40 @@ export function BrowserConfigObjectFieldTemplate(
   );
 
   if (isStage) {
+    // Y4 flatten: stage objects lay FLAT on the panel — no card chrome, no
+    // raised surface. The header is a full-bleed disclosure row; expanding it
+    // opens a RECESSED slab (`surface-sunken` — below the panel, toward the
+    // page) so the interaction reads as a door opening into the graphite,
+    // not a card inflating off it. Group wells keep their one machined-slot
+    // tier inside the slab.
     return (
-      <section
-        className={`rounded-lg border p-2.5 ${FORM.card}`}
-        data-config-section=""
-        data-config-pointer={pointer}>
+      <section data-config-section="" data-config-pointer={pointer}>
         {collapse ? (
           <CollapsibleHeader
             pointer={pointer}
             title={prettyTitle}
             titleClass={`text-sm font-semibold ${textClass}`}
             expanded={expanded}
             collapse={collapse}
+            className="px-2.5 py-2 hover:bg-muted/20 transition-colors"
           />
         ) : (
-          <header className="flex flex-col gap-1">
+          <header className="flex flex-col gap-1 px-2.5 py-2">
             <div className={`text-sm font-semibold ${textClass}`}>{prettyTitle}</div>
             {renderGsComments({ schema, className: labelClass })}
             {description ? <div className={`text-data ${labelClass}`}>{description}</div> : null}
           </header>
         )}
         {expanded ? (
-          <div id={collapse ? configContentId(pointer) : undefined}>
+          <div
+            id={collapse ? configContentId(pointer) : undefined}
+            className={`border-t bg-surface-sunken/60 px-2.5 pb-2.5 pt-2 ${FORM.borderSubtle}`}>
             {collapse ? (
-              <div className="flex flex-col gap-1 pt-1">
+              <div className="flex flex-col gap-1 pb-1.5">
                 {renderGsComments({ schema, className: labelClass })}
                 {description ? <div className={`text-data ${labelClass}`}>{description}</div> : null}
               </div>
             ) : null}
-            <div className={`my-1.5 border-t ${FORM.divider}`} />
             {content}
           </div>
         ) : null}

docs/projects/mapgen-studio-redesign/00-GOAL.md

@@ -462,3 +462,48 @@ addressed to this lane
   effect core — adopting v3 platform now buys a guaranteed second migration.
   Full evidence + revisit triggers:
   `research/04-effect-native-substrate-spike.md`.
+
+## Studio fixes wave Y (2026-06-12, user-reported)
+
+- [x] **Y1 — "Waiting for Proof" zombie (run-in-game proof never matched).**
+  Root cause: `gen:maps` runs inside turbo's CACHED `build` task and
+  `SWOOPER_STUDIO_RUN_ID` was never declared in `turbo.json` — strict env
+  mode stripped it / the cache replayed a bundle without it, so the deployed
+  map script logged `[mapgen-proof] {"requestId":null,…}` (observed live)
+  and the marker waiter could never match: every Run in Game sat the full
+  90s log timeout in "Waiting for Proof" while the game reached turn green.
+  Fix: `turbo.json` `build.env: ["SWOOPER_STUDIO_RUN_ID"]` (cache-correct:
+  the output genuinely differs) + a post-deploy fail-fast guard
+  (`mapScriptEmbedsRequestId`, code `run-request-id-not-materialized`) so a
+  missing embedded id can never masquerade as a proof wait again. Verified
+  live end-to-end: Run in Game → Complete, proof line carries the request id.
+- [x] **Y2 — saved-config precedence affordance.** Verified the suspected
+  partial overwrite is NOT real (dropdown changes merge cleanly); the real
+  gap was silent drift. New categorical rule (system.md Y-wave amendment):
+  drift = "re-applying the saved file would change the state"
+  (`studioSetupDriftsFromSavedConfig`; governed keys + player options only);
+  the header selector gets a warning ring + orange "Modified" pill, click
+  re-applies the saved config. 5 new drift pins. Verified live (Speed →
+  Quick → pill; click → Standard restored, pill cleared).
+- [x] **Y3 — tile grid restored on every stage.** X6's constant graphite
+  border ink (#0d0d11 = the page substrate) was invisible between dark fills
+  at fit zoom — Huge-map tiles are a few px wide, so the tessellation
+  dissolved into dots everywhere except the Delaunay mesh (its own slate
+  ink), i.e. "the grid disappears for every stage besides the first". Fix:
+  the one tile-border RULE — border = own fill × 0.55, opaque
+  (`tileBorderColorForFill`), legible at every zoom/palette/theme. Plus:
+  layer-selection default now prefers the step's tile-space GRID layer over
+  first-emitted (the map studio defaults to the map). New border-rule pin;
+  verified live across stages 2/10/13 (contiguous lattice at fit zoom).
+  Second user report ("when I switch stages, the grid goes away") exposed
+  the OTHER grid: the canvas graticule was gated on layer kind
+  (points/segments only), so it vanished for tile/mesh selections — i.e. on
+  most stage switches. New rule: the graticule is CANVAS substrate — once a
+  manifest exists it follows the grid toggle on every stage (including
+  zero-layer steps like Placement); layers may opt out via meta. Verified
+  live across stages 1/2/10/13/17.
+- [x] **Y4 — flat config accordion.** Stage cards retired: top-level config
+  objects are full-bleed disclosure rows with hairline dividers and zero
+  inter-item margin; expansion opens a recessed `surface-sunken` slab (door
+  INTO the graphite); wells keep their one tier inside. Verified live, dark
+  + light. system.md Y-wave amendment carries all three design rules.