[Email Alias] Slice 2: Alias Provider Settings UI Configuration

[parthashirolkar]

Parent

#70

What to build

Build the settings UI section to add, edit, and delete alias provider configurations and toggle the default provider.

Acceptance criteria

• Add an "Email Alias Integration" card/section inside the frontend Settings.tsx screen.
• Implement inputs to capture the description, provider type (SimpleLogin or DuckDuckGo), and API Access Token.
• Provide options to delete saved integrations and set a default provider.
• Connect the settings form to save modifications back to the Vault via Tauri commands.
• Write frontend unit tests verifying configuration actions (add, edit, delete, default toggle).

Blocked by

• [Email Alias] Slice 1: Vault Schema Update & Backend Alias Client API #71