Proxy selector in Profile Details: cannot reliably add/select proxies and shows internal no-proxy key

Describe the bug 🪲
After the proxy selector change (feat: add proxy configuration selector), proxy selection behavior in Sample UI regressed in Profile Details.

Two user-facing issues are observed:

1. Once a proxy is added, proxy selection is not working as expected (should still allow selecting another proxy/config from the selector).
2. The UI displays the internal no-proxy key/text instead of a user-friendly label (example shown: internal object/key for "no proxy" is rendered).

To Reproduce 🪜

1. Open Sample UI.
2. Go to Profiles and create/edit a profile.
3. Navigate to the proxy configuration section.
4. Add a proxy configuration.
5. Try to select another proxy from the selector.
6. Observe selector behavior and rendered proxy text entries.

Expected behavior

• Proxy selector remains usable after adding a proxy.
• Valid proxy entries are selectable in a clear way.
• No internal keys/object names are shown to users.
• "No proxy" state (if applicable) is shown as a localized/user-friendly label.

Actual behavior

• After adding a proxy, selection behavior is incorrect / not intuitive for further proxy selection.
• Wrong entry text is displayed: internal no-proxy object/key appears in UI instead of a proper label.

Screenshots 🖼️
Issue 1 (selector behavior):

Issue 2 (wrong no-proxy/internal text rendering):

Browser Information (please complete the following information): 🖥️

• OS: Linux
• Browser and Version: [please fill]