Lowercase model names in ps output

The ps command now lowercases model names after stripping defaults,
matching the casing behavior of the ls command. Previously, ps would
display names in the original case used during model loading, while
ls always showed lowercase names from the registry.

Also removes the ToLower workaround in the e2e test that was
compensating for this inconsistency.

Author: tmchow

cmd/cli/commands/ps.go

@@ -39,7 +39,7 @@ func psTable(ps []desktop.BackendStatus) string {
 		if strings.HasPrefix(modelName, "sha256:") {
 			modelName = modelName[7:19]
 		} else {
-			modelName = stripDefaultsFromModelName(modelName)
+			modelName = strings.ToLower(stripDefaultsFromModelName(modelName))
 		}
 
 		table.Append([]string{

e2e/cli_test.go

@@ -45,8 +45,7 @@ func TestE2E_CLI(t *testing.T) {
 				if err != nil {
 					t.Fatalf("cli ps failed: %v\noutput: %s", err, out)
 				}
-				// TODO: ps should return lowercased model names like ls does
-				if !strings.Contains(strings.ToLower(out), "smollm2") {
+				if !strings.Contains(out, "smollm2") {
 					t.Errorf("expected model in ps output, got:\n%s", out)
 				}
 				if !strings.Contains(out, bc.name) {