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

build/panel.js

@@ -26,6 +26,8 @@ export function panelBuildConfig(config) {
       cssCodeSplit: false,
       rollupOptions: {
         ...config.build?.rollupOptions,
+        // The panel is the app alone: one page, so one inlined script.
+        input: undefined,
         output: { inlineDynamicImports: true },
       },
     },

build/vite.js

@@ -1,9 +1,16 @@
+import { fileURLToPath } from 'node:url';
 import { applicationHtmlPlugin } from './application-html.js';
 import cesium from 'vite-plugin-cesium';
 import { DEFAULT_ALLOWED_HOSTS, hostCheckPlugin } from './allowedHosts.js';
 import { embedFramingPlugin } from './embed-framing.js';
 import { panelBuildPlugin } from './panel.js';
 
+/** HTML documents a production build emits: the app and its mobile shell. */
+export const BROWSER_PAGES = Object.freeze({
+  main: fileURLToPath(new URL('../index.html', import.meta.url)),
+  mobile: fileURLToPath(new URL('../mobile/index.html', import.meta.url)),
+});
+
 /**
  * Content-Security-Policy for every document the dev/preview server serves.
  * No inline script is permitted, and the only foreign script origins are the
@@ -113,6 +120,9 @@ export function createBrowserViteConfig({
         mapillaryToken ?? '',
       ),
     },
-    build: { chunkSizeWarningLimit: 1500 },
+    build: {
+      chunkSizeWarningLimit: 1500,
+      rollupOptions: { input: { ...BROWSER_PAGES } },
+    },
   };
 }