chore: bump version to 0.1.0-beta.15

[d0dg3r]

Bumps version to test robust PKGBUILD fixes.

[Copilot]

Pull request overview

Bumps the desktop app’s npm package version to 0.1.0-beta.15 to support testing of robust PKGBUILD fixes.

Changes:

• Update apps/desktop/package.json version from 0.1.0-beta.14 → 0.1.0-beta.15.

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[Copilot]

The repo keeps the desktop app version in sync across apps/desktop/package.json, apps/desktop/src-tauri/tauri.conf.json, and apps/desktop/src-tauri/Cargo.toml. This PR updates only package.json (now 0.1.0-beta.15) while tauri.conf.json/Cargo.toml are still 0.1.0-beta.11, which can lead to inconsistent bundle/app metadata in local builds and drift before tagging. Please bump the Tauri config and Rust crate versions to the same prerelease in the same PR (or explain why only npm version should change).

Suggested change

	"version": "0.1.0-beta.15",
	"version": "0.1.0-beta.11",