ui/phase-9: revert premature done-mark, reuse minScaleNoWrap

Previous Phase 9 commit pre-marked PLAN.md with "Status: done"
before the local-ci gate ran green. Project rule
(galaxy/CLAUDE.md "Per-stage CI gate") allows the marker only
after the run is success; revert to "Status: pending".

Also folds the inline minScale formula in the playground page
into a call to map/no-wrap.ts:minScaleNoWrap so the playground
and the renderer share one source of truth for the floor.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ui/frontend/src/routes/__debug/map/+page.svelte

@@ -3,6 +3,7 @@
 	import { page } from "$app/state";
 	import {
 		createRenderer,
+		minScaleNoWrap,
 		sampleWorld,
 		type RendererHandle,
 		type RendererPreference,
@@ -60,12 +61,13 @@
 			}
 			backend = handle.getBackend();
 
-			// Initial camera: place world centre.
+			// Initial camera: world centre, zoomed slightly past the
+			// fits-the-viewport floor so neighbouring torus copies are
+			// visible too.
 			handle.viewport.moveCenter(world.width / 2, world.height / 2);
-			// Initial zoom: fit-ish (slight zoom-in from minScale).
-			const minScale = Math.max(
-				containerEl.clientWidth / world.width,
-				containerEl.clientHeight / world.height,
+			const minScale = minScaleNoWrap(
+				{ widthPx: containerEl.clientWidth, heightPx: containerEl.clientHeight },
+				world,
 			);
 			handle.viewport.setZoom(minScale * 1.2, true);
 			if (mode === "no-wrap") handle.setMode("no-wrap"); // re-clamp post zoom