fix(settings): keep unlocked category routes reachable and defer a relock reload that overtakes the initial hydration

- The Xtream category guard no longer runs the item check on category-only
  routes (Number(null) is 0), which prompted for the PIN on every unlocked
  VOD and series category while the lock was active.
- A lock change during the initial Xtream hydration withholds the rows the
  hydration publishes and runs the filtered reload once it has settled,
  on every path that marks the content initialized.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

docs/architecture/parental-lock.md

@@ -167,7 +167,13 @@ on either side.
   empties every catalog list and `clearSearchResults()` the stored search
   before the filtered reads refill them; both reloads take a publish guard
   answered before every state patch, so a read issued under an older lock
-  version is dropped instead of published. Both reloads fail closed: a category reload that
+  version is dropped instead of published. A lock change that overtakes
+  the INITIAL hydration (the content is not initialized yet, so the reload
+  has nothing to re-read) sets a deferred-reload flag instead: the
+  hydration then publishes empty lists in place of the rows it read under
+  the previous lock state, and the filtered reload runs as soon as the
+  hydration settles, on every path that marks the content initialized.
+  Both reloads fail closed: a category reload that
   rejects empties the three category lists, and a per-type content reload
   that rejects empties that type and sets it back to `idle` so the next
   visit loads it again (filtered) — rows read under the previous lock state