feat(mobile): add the mobile app shell, capture and the /mobile/ build page

Five tabs (Now, Globe, Capture, Threads, You) over one persistent globe:
a live situation feed whose cards open into the world with a detented
brief, the lens dock and time ribbon, AR Look and signed Witness
capture (ECDSA P-256 in IndexedDB, SHA-256 hash chain, IMU and GPS
trace, eight-check verify), the Bhote Koshi reconstruction thread with
a live ledger, and hinge-aware two-pane layouts for foldables.

The production build now emits mobile/index.html beside the app; the
panel build keeps the app alone.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01VVYRAqiQj9Y1V9ZfG1RcDH

mobile/index.html

@@ -22,7 +22,7 @@
     <meta name="apple-mobile-web-app-title" content="God's Eye" />
     <meta name="format-detection" content="telephone=no" />
     <link rel="icon" href="/logo.svg" type="image/svg+xml" />
-    <link rel="apple-touch-icon" href="/logo.svg" />
+    <link rel="apple-touch-icon" sizes="180x180" href="/icons/icon-180.png" />
     <link rel="preconnect" href="https://server.arcgisonline.com" crossorigin />
     <link rel="stylesheet" href="./styles/tokens.css" />
     <link rel="stylesheet" href="./styles/shell.css" />