fix: Refetch previews on start and switch to path-based routing

Two fixes:
- Call previewsQuery.refetch() in startPreview.onSuccess so the UI
  transitions from "building" to the preview link without a page refresh.
- Switch from subdomain routing (*.localhost) to path-based routing
  (localhost:<port>/<id>/) since macOS doesn't resolve wildcard
  localhost subdomains.

apps/web/src/components/review/InitiativeReview.tsx

@@ -73,6 +73,7 @@ export function InitiativeReview({ initiativeId, onCompleted }: InitiativeReview
   const startPreview = trpc.startPreview.useMutation({
     onSuccess: (data) => {
       setActivePreviewId(data.id);
+      previewsQuery.refetch();
       toast.success(`Preview running at ${data.url}`);
     },
     onError: (err) => toast.error(`Preview failed: ${err.message}`),

apps/web/src/components/review/ReviewTab.tsx

@@ -99,6 +99,7 @@ export function ReviewTab({ initiativeId }: ReviewTabProps) {
   const startPreview = trpc.startPreview.useMutation({
     onSuccess: (data) => {
       setActivePreviewId(data.id);
+      previewsQuery.refetch();
       toast.success(`Preview running at ${data.url}`);
     },
     onError: (err) => toast.error(`Preview failed: ${err.message}`),