Wave-5 reskin batch 5: normalize stray pixel text sizes onto the declared ladder

--text-xxs (10px) joins the ladder; every component-level text-[9|10|11px]
literal in owned components now pulls from the ladder (graph-view.tsx and
home.tsx untouched — graph stream). Cosmetic pins updated where touched.

components/plan-block.tsx

@@ -473,7 +473,7 @@ export function PlanPopup({ messages, onClose }: { messages: readonly PopupMessa
 							/>
 						</div>
 						<div className="pointer-events-none absolute inset-x-0 bottom-0 flex items-end justify-between p-2">
-							<span className="text-[10px] text-muted-foreground/60">Drag to pan · scroll to zoom</span>
+							<span className="text-xxs text-muted-foreground/60">Drag to pan · scroll to zoom</span>
 							<div className="flex gap-1">
 								<button
 									type="button"