feat: the demo's Azure accounts are alex and admin.alex, named like accounts

"dev" and "ops" read like environments, so dev above platform-prod
looked wrong.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/ui/app/jump.go

@@ -147,8 +147,8 @@ func sourceMatches(r ref.Ref, src provider.Source) bool {
 	return src.ID == r.Subscription
 }
 
-// accountOf is the account part of a source's provider label ("dev" in
-// "Azure · dev"), or "" when there's a single account.
+// accountOf is the account part of a source's provider label ("alex" in
+// "Azure · alex"), or "" when there's a single account.
 func accountOf(src provider.Source) string {
 	account, ok := strings.CutPrefix(src.ProviderLabel, string(src.Kind)+" · ")
 	if !ok {