chore: capacitor integration tests

[stevensJourney]

The work here is inspired and based off the Tauri integration tests added by @simolus3 . Reference

This PR adds integration tests for the Capacitor SDK.

For context, most Capacitor plugins include an example-app folder which is a basic Capacitor App used to verify the plugin compiles correctly for Android and iOS.

This PR uses the example-app as a code runner which loads the Vitest Browser-mode server's URL as the source of the Capacitor web content.

We use a small trick where the example-app's Capacitor config is a TypeScript (could also be JavaScript) file which sets the app's web content source to the value of an environment variable. This means that the app can be started with a dynamic web contents source.

The Vitest browser mode integration then builds the Capacitor app and starts it by providing the appropriate URL for the Vitest test suite.

This PR ports the React Native tests from tools/powersynctests for Capacitor. The test suite essentially only handles basic query operations and Capacitor specific logic - like ensuring concurrency. AI usage disclaimer - the tests were ported using Codex GPT 5.5.

Bug fix

These unit tests actually exposed a bug in the current code! The executeBatch method was broken on iOS. This adds a fix.

[changeset-bot]

🦋 Changeset detected

Latest commit: 0d6b358

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@powersync/capacitor	Patch

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