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.

app/globals.css

@@ -88,6 +88,8 @@
 	--font-title: "lh-cmu", serif;
 	/* The modular type ladder — each size carries its own line-height.
 	   Component sizes must pull from this ladder. */
+	--text-xxs: 10px;
+	--text-xxs--line-height: 1.4;
 	--text-xs: 11px;
 	--text-xs--line-height: 1.4;
 	--text-sm: 12.5px;