Sentry improvements: context, tracing, source maps, privacy manifest

- Set Sentry user context (id, username) in Journal root for all routes
- Tag Planner errors with session_id
- Use reactRouterV7BrowserTracingIntegration for route-aware traces
- Hidden source maps (no sourceMappingURL in bundles, .map deleted after
  upload to Sentry)
- Privacy manifest at /privacy documenting all data collection
- robots.txt blocking all bots on both apps
- Suppress i18next promotional console log

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/journal/app/entry.client.tsx

@@ -1,14 +1,25 @@
 import * as Sentry from "@sentry/react";
+import { useEffect } from "react";
 import { startTransition, StrictMode } from "react";
 import { hydrateRoot } from "react-dom/client";
 import { HydratedRouter } from "react-router/dom";
+import { useLocation, useNavigationType, createRoutesFromChildren, matchRoutes } from "react-router";
 
 const sentryEnvironment = import.meta.env.VITE_SENTRY_ENVIRONMENT ??
   (import.meta.env.PROD ? "production" : "development");
 
 Sentry.init({
   dsn: "https://a32ffcc575d34be072e91b20f247eeee@o4509530546634752.ingest.de.sentry.io/4509530555547728",
-  integrations: [Sentry.browserTracingIntegration(), Sentry.replayIntegration()],
+  integrations: [
+    Sentry.reactRouterV7BrowserTracingIntegration({
+      useEffect,
+      useLocation,
+      useNavigationType,
+      createRoutesFromChildren,
+      matchRoutes,
+    }),
+    Sentry.replayIntegration(),
+  ],
   environment: sentryEnvironment,
   tracesSampleRate: sentryEnvironment === "ci" ? 0 : 1.0,
   replaysSessionSampleRate: sentryEnvironment === "ci" ? 0 : 1.0,