Replace el.toml with manifest.el throughout — El manifests are El, not TOML

examples/profile-card/src/main.rs

@@ -5,7 +5,7 @@
 //! - Styling via semantic tokens and the StyleModifier trait
 //! - Responsive layout: VStack/HStack that wrap automatically
 //! - Localization via LocaleContext and t()/t_plural()
-//! - Configuration from el.toml / env vars
+//! - Configuration from manifest.el / env vars
 //! - Secrets that never appear in logs
 
 use std::collections::HashMap;
@@ -183,7 +183,7 @@ app.debug = "true"
 "#;
 
     let toml_source = load_from_toml(el_toml, &Environment::Development)
-        .expect("el.toml should be valid");
+        .expect("manifest.el should be valid");
 
     let mut config = Config::new(Environment::Development);
     config.push_source(Box::new(toml_source));