v0.26.1 — show auto-generated values on deploy page

- Pre-generate domain + secret field values when deploy page loads,
  so user sees actual domain and masked passwords (with reveal button)
  before deploying. Same values submitted as hidden inputs → saved to app.yaml.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

controller/internal/web/handlers.go

@@ -254,7 +254,7 @@ func (s *Server) deployHandler(w http.ResponseWriter, r *http.Request, name stri
 	data["AppPageURL"] = s.cfg.AppPageURL(meta.Slug)
 	data["UserFields"] = meta.UserFacingFields()
 	data["AutoFields"] = meta.AutoGeneratedFields()
-	// Auto-generated field values for already-deployed apps
+	// Auto-generated field values: existing values for deployed apps, pre-generated for new deploys
 	autoFieldValues := make(map[string]string)
 	if alreadyDeployed && appCfg != nil {
 		for _, f := range meta.AutoGeneratedFields() {
@@ -262,6 +262,12 @@ func (s *Server) deployHandler(w http.ResponseWriter, r *http.Request, name stri
 				autoFieldValues[f.EnvVar] = val
 			}
 		}
+	} else if !alreadyDeployed {
+		// Pre-generate values so the user sees (and can note down) domain/passwords before deploying.
+		// These same values are submitted back in the form and saved to app.yaml.
+		if preview, err := s.stackMgr.PreviewDeployValues(name); err == nil {
+			autoFieldValues = preview
+		}
 	}
 	data["AutoFieldValues"] = autoFieldValues
 	// Storage paths with free space info for deploy dropdown