fix: Build client-side JS bundle for demo page

- Add bun build step to create browser-compatible JS from TypeScript
- Update demo.html to import from /dist/index.js
- Update server to serve /dist/* for bundled modules

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Dockerfile.encryptid

@@ -17,8 +17,8 @@ COPY src/encryptid ./src/encryptid
 COPY public ./public
 COPY tsconfig.json ./
 
-# Build (if needed - Bun can run TS directly)
-# RUN bun build ./src/encryptid/server.ts --target=bun --outdir=./dist
+# Build client-side modules for browser
+RUN bun build ./src/encryptid/index.ts --outdir=./src/encryptid/dist --target=browser --minify
 
 # Production stage
 FROM oven/bun:1.1-slim

src/encryptid/demo.html

@@ -428,11 +428,7 @@
       signData,
       verifySignature,
       AuthLevel,
-    } from './index.ts';
-
-    // Import UI components (registers custom elements)
-    import './ui/guardian-setup.ts';
-    import './ui/login-button.ts';
+    } from '/dist/index.js';
 
     // ========================================================================
     // CAPABILITY DETECTION

src/encryptid/server.ts

@@ -432,6 +432,8 @@ async function generateSessionToken(userId: string, username: string): Promise<s
 
 // Serve demo page and static assets
 app.get('/demo.html', serveStatic({ path: './src/encryptid/demo.html' }));
+// Serve bundled JavaScript modules
+app.use('/dist/*', serveStatic({ root: './src/encryptid/' }));
 app.use('/demo/*', serveStatic({ root: './src/encryptid/' }));
 app.use('/static/*', serveStatic({ root: './public/' }));