release: bump version to 0.73.0

AGENTS.md

@@ -81,6 +81,10 @@ the user's login interactive shell instead of assuming a specific dotfile.
   rendered smoke evidence for public pages, auth guards, authenticated admin
   route/section availability, safe navigation/search/tab interactions, mobile
   layout, and 125% / 150% zoom, not only a build.
+- Admin or Docs layout changes must load `rules.md` `uiux` and preserve the
+  one-screen (`一屏` / `首屏`) height chain: route roots use `height: 100%`,
+  intermediate wrappers keep `min-height: 0`, and only the intended child owns
+  scrolling.
 - `aiprovider` is a protocol/provider adapter; keep business prompts and product
   workflows in the backend.
 - Earth rendering depends on layer order, depth behavior, picking, and