Pinscope open-source core

Agentic schematic validation: datasheet extraction via Claude Console
Skills, netlist/BOM design graph, per-IC direct datasheet review with
page citations, capacitor derating, Next.js report UI.

Extracted from the Pinscope cloud codebase. Auth and billing live in the
private gateway repo behind stable seams (billing_hook.py, adapter files
listed in CLAUDE.md).

frontend/public/favicon_io/site.webmanifest

@@ -0,0 +1,19 @@
+{
+  "name": "Pinscope",
+  "short_name": "Pinscope",
+  "icons": [
+    {
+      "src": "/favicon_io/android-chrome-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/favicon_io/android-chrome-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ],
+  "theme_color": "#3B82F6",
+  "background_color": "#ffffff",
+  "display": "standalone"
+}