feat(app): refine agent profile creation (#3680)

Keep profiles as the richer primitive while restoring the familiar star cue and clearer guidance for agent selection. Account for borders in shared field geometry so controls preserve their declared heights across form consumers.

packages/app/src/components/ui/form-field.tsx

@@ -45,7 +45,7 @@ export function Field({ label, children, hint, error, testID }: FieldProps) {
     }
     if (hint) {
       return (
-        <Text numberOfLines={1} style={styles.hintText} testID={hintTestID}>
+        <Text style={styles.hintText} testID={hintTestID}>
           {hint}
         </Text>
       );