Add server, routes, views, CLI, CSS, and integration tests

- Server factory with Fastify plugins (JWT, cookie, multipart, formbody, static)
- Auth middleware: requireAuth preHandler (401 for API, redirect for pages)
- Auth API routes: POST /api/v1/auth/login, POST /api/v1/auth/logout
- File API routes: GET/POST /api/v1/files, DELETE /api/v1/files/:id
- Page routes: /, /login, /logout, /upload, /files, /files/:id/delete, /f/:id, /f/:id/raw
- HTML views: layout, login, upload, file-list, file-view, not-found
- CLI register-user script
- public/style.css dark theme
- Test helpers: createTestApp, loginAs, buildMultipart
- Integration tests for auth API, file API, and page routes (51 tests passing)
- Update CLAUDE.md with red/green TDD and commit instructions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/index.ts

@@ -0,0 +1,19 @@
+import { mkdirSync } from 'fs';
+import { loadConfig } from './config.ts';
+import { initDb } from './db/schema.ts';
+import { createServer } from './server.ts';
+
+const config = loadConfig();
+
+mkdirSync(config.uploadDir, { recursive: true });
+
+const db = initDb(config.dbPath);
+const app = createServer({ config, db });
+
+try {
+  await app.listen({ port: config.port, host: config.host });
+  console.log(`Nanodrop running on http://${config.host}:${config.port}`);
+} catch (err) {
+  console.error(err);
+  process.exit(1);
+}