feat(badges): add manual one-off badge create modal

Two-step creation: POST event_person first, then event_badge linked to it.
Badge create route (event_person parent) pending backend fix — frontend is
ready and passing event_person_id + event_badge_template_id in payload.

- ae_events__event_person.ts: new create function (nested under event)
- ae_events_functions.ts: export create_ae_obj__event_person
- ae_comp__badge_create_form.svelte: modal form with live name preview,
  conditional display-name override, template selector (auto-selects when
  only one template), badge_type_code_li derived from selected template's
  badge_type_list JSON, two-step submit status labels
- +page.svelte: load template list via liveQuery, wire Create Badge button
  (edit_mode only), native <dialog> modal with backdrop, remote-first
  refresh on success

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

src/lib/ae_events/ae_events__event_person.ts

@@ -0,0 +1,42 @@
+import type { key_val } from '$lib/stores/ae_stores';
+import { api } from '$lib/api/api';
+
+const ae_promises: key_val = {};
+
+/**
+ * create_ae_obj__event_person
+ * Creates a new event_person record linked to an event.
+ * Used as the first step of manual one-off badge creation.
+ * The returned event_person_id is then passed to create_ae_obj__event_badge.
+ */
+export async function create_ae_obj__event_person({
+    api_cfg,
+    event_id,
+    data_kv,
+    params = {},
+    log_lvl = 0
+}: {
+    api_cfg: any;
+    event_id: string;
+    data_kv: key_val;
+    params?: key_val;
+    log_lvl?: number;
+}): Promise<any | null> {
+    if (log_lvl) {
+        console.log(
+            `*** create_ae_obj__event_person() *** event_id=${event_id}`
+        );
+    }
+
+    ae_promises.create__event_person = await api.create_nested_obj({
+        api_cfg,
+        parent_type: 'event',
+        parent_id: event_id,
+        child_type: 'event_person',
+        fields: data_kv,
+        params,
+        log_lvl
+    });
+
+    return ae_promises.create__event_person;
+}

src/lib/ae_events/ae_events_functions.ts

@@ -33,6 +33,8 @@ import * as event_presenter from '$lib/ae_events/ae_events__event_presenter';
 
 import * as event_badge from '$lib/ae_events/ae_events__event_badge';
 
+import { create_ae_obj__event_person } from '$lib/ae_events/ae_events__event_person';
+
 import * as event_badge_template from '$lib/ae_events/ae_events__event_badge_template';
 
 const export_obj = {
@@ -46,6 +48,9 @@ const export_obj = {
     update_ae_obj__event: event.update_ae_obj__event,
     sync_config__event_pres_mgmt: event.sync_config__event_pres_mgmt,
 
+    // Event Person
+    create_ae_obj__event_person: create_ae_obj__event_person,
+
     // Event Badges
     load_ae_obj_id__event_badge: event_badge.load_ae_obj_id__event_badge,
     load_ae_obj_li__event_badge: event_badge.load_ae_obj_li__event_badge,