Remove contact identity fields from Stage 0 and widen Current stage

Drop the readonly First name, Last name, and Email fields from the
Check-in (organizing) section display. Add an optional fullWidth flag to
FieldConfig and set it on current_stage so it spans the full section grid.

components/StageSection.tsx

@@ -259,6 +259,7 @@ export function StageSection({
               {visibleFields.map((f) => {
                 const resolvedOptions = f.optionGroupId ? options[f.optionGroupId] : undefined;
                 const wide =
+                  f.fullWidth ||
                   f.type === "textarea" ||
                   f.type === "boolean" ||
                   f.type === "multiselect";
@@ -426,7 +427,10 @@ function FieldGroupCard({
         {fields.map((f) => {
           const resolvedOptions = f.optionGroupId ? options[f.optionGroupId] : undefined;
           const wide =
-            f.type === "textarea" || f.type === "boolean" || f.type === "multiselect";
+            f.fullWidth ||
+            f.type === "textarea" ||
+            f.type === "boolean" ||
+            f.type === "multiselect";
           return (
             <div key={f.name} className={wide ? "md:col-span-2" : ""}>
               <FieldRenderer

config/form.ts

@@ -103,24 +103,7 @@ const stage0: StageSectionConfig = {
       label: "Current stage",
       type: "readonly",
       optionGroupId: STAGE_OPTION_GROUP_ID,
-    },
-    // Contact identity, sourced from the cid in /api/data. Display-only —
-    // never written back to Civi. These confirm to the form-filler which
-    // contact record their submission will be attributed to.
-    {
-      name: "contact_first_name",
-      label: "First name",
-      type: "readonly",
-    },
-    {
-      name: "contact_last_name",
-      label: "Last name",
-      type: "readonly",
-    },
-    {
-      name: "contact_email",
-      label: "Email",
-      type: "readonly",
+      fullWidth: true,
     },
     // Org-contact fields (Food_Co_op_Organizing custom group). These live
     // on the Organization Contact record, not on the Check-in activity, so

types/form.ts

@@ -101,6 +101,12 @@ export interface FieldConfig {
    * FormDataPayload.options so the renderer can use real CRM-defined choices.
    */
   optionGroupId?: number;
+  /**
+   * Force this field to span the full width of the section grid (both
+   * columns), regardless of its type. Wide types (textarea, boolean,
+   * multiselect) already span by default.
+   */
+  fullWidth?: boolean;
 }
 
 /**