Top: each CPU's threads are counted from 0 under it on a two-socket machine

The kernel numbers the whole machine's threads in one run and deals them out a
socket at a time, twice: nexus's first CPU listed C0–C9 and C20–C29, its second
C10–C19 and C30–C39. Each CPU now lists its own twenty as C0–C19; the kernel's
number is in the row's tooltip.

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

web/package.json

@@ -7,7 +7,7 @@
     "dev": "vite",
     "build": "tsc --noEmit && vite build",
     "icons": "node scripts/icons.mjs",
-    "test": "node scripts/test-graphcols.mjs && node scripts/test-css-imports.mjs && node scripts/test-resolve-path.mjs"
+    "test": "node scripts/test-graphcols.mjs && node scripts/test-sockets.mjs && node scripts/test-css-imports.mjs && node scripts/test-resolve-path.mjs"
   },
   "dependencies": {
     "@xterm/addon-fit": "^0.10.0",