fix: investment scenario detail blank screen and auto-renew refresh

Move useMemo hook above early returns to satisfy React Rules of Hooks,
fixing blank screen when navigating to scenario detail. Also re-fetch
scenario after projection updates so auto-renew renewal records appear
automatically without requiring manual navigation.

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

frontend/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "hoa-ledgeriq-frontend",
-  "version": "2026.3.17",
+  "version": "2026.3.19",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "hoa-ledgeriq-frontend",
-      "version": "2026.3.17",
+      "version": "2026.3.19",
       "dependencies": {
         "@mantine/core": "^7.15.3",
         "@mantine/dates": "^7.15.3",