Add server editing and deletion

TESTING.md

@@ -117,6 +117,25 @@ answer before uploading it to App Store Connect.
       still work without re-entry.
 - [ ] Open the server picker from a repository list and switch between at least
       two configured servers; every data tab changes to the selected server.
+- [ ] Swipe a server row from the trailing edge; Delete and Edit use native
+      contextual actions with symbols. A full swipe invokes Delete, and both a
+      full swipe and a Delete tap still require the same destructive alert.
+- [ ] Cancel the delete alert; the row, selected server, saved token, favorites,
+      and filters remain unchanged.
+- [ ] Tap Edit; API provider, name, and URL show the saved values. The secure
+      token field is empty and says Leave unchanged so the stored token is not
+      exposed to the UI.
+- [ ] Save edits with the token field empty; the existing token still works.
+      Then change the name, URL, provider, and token and save again; the server
+      is revalidated, provider discovery is applied, URL-scoped favorites and
+      filters follow the server, and all data tabs use the edited connection.
+- [ ] Enter invalid edited credentials or an invalid URL; the editor stays open,
+      shows the error, and preserves the previously working configuration.
+- [ ] Confirm Delete; the row and Keychain token are removed. If it was selected,
+      the next server is selected (or the previous last row); deleting the last
+      server returns server-dependent tabs to their empty Servers screen.
+- [ ] Terminate and relaunch after editing and deleting; edited details persist,
+      deleted servers do not return, and remaining servers still authenticate.
 
 ## Native interaction and navigation