build(deps): upgrade Tauri from beta to stable

[daniel-mader]

Description of change

Tauri v2 is now stable and we can safely upgrade.

Links to any relevant issues

• closes Upgrade Tauri #283, Upgrade Tauri to v2 #320
• blocked until fix(cli): iOS build crashing when development team has spaces tauri-apps/tauri#12290 is released

How the change has been tested

n/a

Definition of Done checklist

Add an x to the boxes that are relevant to your changes.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[maiertech]

This branch contains a regression in dev mode (dashed lines should be off):

[maiertech]

UniMe gets stuck on / route and does not navigate to /me. To reproduce:

1. Run pnpm tauri ios dev with iPhone attached via USB.
2. In dev mode turn on Ferris profile.
3. UniMe is stuck on /.