The selected Space used to live in sessionStorage and ride along invisibly
with every collection route. It now lives in the URL: collection pages exist
both globally and beneath /spaces/:spaceUid, and the Space context derives
its scope from the current location.
- Add a Space route branch (Home, Explore, Calendar, Attachments) guarded by
a SpaceRoute that shows loading, unavailable, and retry states.
- Resolve collection routes through one matchPath-based helper built from the
route constants; build Space-scoped paths with buildCollectionPath.
- Fetch the route Space directly, seeded from the switcher list so pages are
not held behind a second round-trip.
- Turn the Space switcher into plain links that preserve the current
collection view and query.
- Drop the remembered-Space machinery: clearSelectedSpace/selectMemos,
the compose-placement policy, routeSupportsCollectionScope, and the
quick-find switchToAll flag are all implied by the URL now.
- Return from memo details to the full origin URL, including its Space.
- Add space.unavailable and space.back-to-memos strings; align the
Azerbaijani catalog with English.
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