chore: merge main, resolve biome formatting conflicts

Merge origin/main into feat/external-2fa-codes. Resolve formatting
conflicts caused by biome rollout; preserve both feature streams:
PR's external 2FA token + signing-session 2FA proof additions plus
main's RateLimit/RecipientExpired/signingReminders/date-auto-insert.

In complete-document-with-token.ts, drop the duplicate early
field-fetching block introduced when main moved that logic later
with date auto-insert support; keep the EXTERNAL_TWO_FACTOR_AUTH
check using derivedRecipientActionAuth.

apps/remix/server/load-context.ts

@@ -0,0 +1,33 @@
+import { getContext } from 'hono/context-storage';
+import type { AppLoadContext } from 'react-router';
+
+import type { HonoEnv } from './router';
+import { CSP_NONCE_KEY } from './security-headers';
+
+/**
+ * Augment React Router's `AppLoadContext` so loaders, actions, and
+ * `entry.server` can access fields by name without casts.
+ */
+declare module 'react-router' {
+  interface AppLoadContext {
+    /**
+     * Per-request CSP nonce. Populated by `securityHeadersMiddleware` and surfaced here
+     * so it can be threaded into `<ServerRouter nonce>` and root loader
+     * data, which then feeds `<Scripts>`, `<Links>`, etc.
+     */
+    nonce: string;
+  }
+}
+
+/**
+ * Builds the React Router `AppLoadContext` for both dev (vite plugin) and
+ * production (`hono-react-router-adapter/node`).
+ *
+ * The Hono context isn't passed directly by the adapter, so we read it via
+ * `hono/context-storage`, which is enabled in `server/router.ts`.
+ */
+export const getLoadContext = (): AppLoadContext => {
+  const nonce = getContext<HonoEnv>().var[CSP_NONCE_KEY] ?? '';
+
+  return { nonce };
+};