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>

cmd/lazysecrets/main.go

@@ -243,8 +243,8 @@ Flags:
 	if *demo {
 		// Two Azure accounts, like a personal and an admin login in az.
 		providers = []provider.Provider{
-			fake.Azure(400*time.Millisecond).As("Azure:dev@example.com/demo", "Azure · dev"),
-			fake.AzureOps(700*time.Millisecond).As("Azure:ops@example.com/demo", "Azure · ops"),
+			fake.Azure(400*time.Millisecond).As("Azure:alex@example.com/demo", "Azure · alex"),
+			fake.AzureOps(700*time.Millisecond).As("Azure:admin.alex@example.com/demo", "Azure · admin.alex"),
 			fake.Databricks(600 * time.Millisecond),
 			fake.Repos(),
 		}

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 {