AD-21 Update electron-vite to stable v6 after GA release

[Finfinder]

Objective

Update the electron-vite pin in package.json from 6.0.0-beta.1 to the stable 6.0.0 once it is released without a -beta suffix.

Context

The current plan intentionally uses electron-vite@6.0.0-beta.1 because it is the only available release supporting Vite 8. A stable GA release will eliminate the risk of further breaking changes before official release.

Scope

• Monitor the electron-vite npm registry for a stable 6.0.0 (or later) release without a prerelease suffix.
• Update the version pin in package.json and run npm install.
• Run the full validation suite (typecheck, lint, unit tests, architecture tests, build, E2E) to confirm no regressions.
• Update CHANGELOG.md and any documentation referencing the beta version.
• Remove any workarounds or beta-specific configuration introduced for 6.0.0-beta.1.

Rationale

Using a beta dependency in production increases the risk of unexpected breaking changes on every install. A stable release provides a fixed, tested API surface and removes the need for the @beta npm tag.

Benefits

• Eliminates the risk of unexpected breaking changes on fresh npm install.
• Removes the need for the @beta npm dist-tag during installation.
• Greater confidence in the stability of the electron-vite public API.
• Cleaner dependency manifest without prerelease markers.

Definition of Done

• package.json pins electron-vite at a stable version (no -beta suffix).
• Full validation suite passes after the update.
• CHANGELOG.md documents the version bump.
• Beta-specific workarounds are removed.

Milestone

1.0 Stabilize MVP