Routeloader split

.changeset/green-experts-turn.md

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+'@qwik.dev/router': minor
+
+Refactor route loaders to be backed by shared async signals across SSR, client refresh, and action invalidation.

.changeset/nasty-pans-tickle.md

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+---
+'@qwik.dev/router': major
+---
+
+BREAKING: Qwik Router no longer retrieves `q-data.json` files on every SPA navigation. You can remove any caching rules for these.
+
+Instead, Qwik Router now retrieves `q-loader-hash.manifestHash.json` for RouteLoader data. You can specify expiry for each RouteLoader individually, and it is automatically used to set browser caching headers. The `manifestHash` ensures that when you build a new version of your app, the old cached data will be invalidated and the new data will be fetched.
+
+The default expiry for RouteLoader data is 5 minutes, so that prefetching and caching of RouteLoader data is enabled by default. You can set `expiry: 0` to mark a RouteLoader as never expiring.
+
+Furthermore, any RouteLoader that has `expiry: 0` will be generated as a file during SSG, which allows SPA navigation to work even without a server.
+
+Note: Be careful with caching for RouteLoaders that return user-specific data, especially regarding logout and CDN caching.

.changeset/wicked-showers-deny.md

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+---
+'@qwik.dev/router': major
+---
+
+BREAKING: routeloader failures are no longer stored as `loaderSignal.value.failed` but instead are at `loaderSignal.error`. Reading `loaderSignal.value` will throw the error if the loader failed. This is in line with the AsyncSignal API.