feat(pres_mgmt): restore location and description editing in session view

Event location (FK lookup) and description were both visible in the session
view but had no edit controls — lost during V3 migration. Restored both:

- event_location_id: select dropdown populated from this event's location list
  (liveQuery on db_events.location filtered by event_id from the session object)
- description: textarea editor shown directly in edit_mode (no collapse needed
  when actively editing)

Also added event_location_id to editable_fields__event_session, which was
missing and would have caused backend rejections on PATCH.

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

src/lib/ae_events/ae_events__event_session.editable_fields.ts

@@ -2,6 +2,7 @@ export const editable_fields__event_session = [
     'external_id',
     'code',
     'type_code',
+    'event_location_id',
     'poc_agree',
     'poc_kv_json',
     'name',

src/routes/events/[event_id]/(pres_mgmt)/session/[session_id]/session_view.svelte

@@ -17,6 +17,7 @@ let {
 
 // Imports
 import { Modal } from 'flowbite-svelte';
+import { liveQuery } from 'dexie';
 import type { key_val } from '$lib/stores/ae_stores';
 import { ae_util } from '$lib/ae_utils/ae_utils';
 import Element_ae_obj_field_editor from '$lib/elements/element_ae_obj_field_editor.svelte';
@@ -29,6 +30,7 @@ import {
     events_slct
 } from '$lib/stores/ae_events_stores';
 import { events_func } from '$lib/ae_events/ae_events_functions';
+import { db_events } from '$lib/ae_events/db_events';
 
 import Comp_event_session_poc_profile from './ae_comp__event_session_poc_profile.svelte';
 import Comp_event_session_poc_form_agree from './ae_comp__event_session_poc_form_agree.svelte';
@@ -52,6 +54,29 @@ $events_sess.pres_mgmt.show_content__presenter_start = false;
 // Description expand/collapse — collapsed by default (descriptions can be long)
 let desc_expanded = $state(false);
 
+// Location list for the session's event — used to build the select options in edit mode.
+// WHY: event_location_id is a FK; the editor needs the full list so staff can pick from
+// known rooms instead of typing a raw UUID. Keyed by event_id from the session object.
+let current_event_id = $derived($lq__event_session_obj?.event_id ?? null);
+let lq__event_location_obj_li = $derived(
+    liveQuery(async () => {
+        if (!current_event_id) return [];
+        return await db_events.location
+            .where('event_id')
+            .equals(current_event_id)
+            .sortBy('name');
+    })
+);
+// { event_location_id: location_name } — consumed by Element_ae_obj_field_editor select
+let location_select_options = $derived(
+    Object.fromEntries(
+        ($lq__event_location_obj_li ?? []).map((loc) => [
+            (loc as { event_location_id: string }).event_location_id,
+            (loc as { name: string }).name
+        ])
+    )
+);
+
 // QR Code Generation Logic
 $events_sess.pres_mgmt.session__updated_on = null;
 $effect(() => {
@@ -177,7 +202,33 @@ $effect(() => {
                             $events_loc.pres_mgmt.time_format
                         )}
                     </span>
-                    {#if $lq__event_session_obj.event_location_name}
+
+                    <!-- Room/Location: editable in edit_mode via select from this event's locations.
+                         WHY: event_location_id is a FK — staff need to pick from known rooms,
+                         not type a raw UUID. The liveQuery above loads locations for this event. -->
+                    {#if $ae_loc.edit_mode}
+                        <Element_ae_obj_field_editor
+                            display_block={true}
+                            object_type="event_session"
+                            object_id={$lq__event_session_obj.id}
+                            field_name="event_location_id"
+                            field_type="select"
+                            edit_label="Room / Location"
+                            current_value={$lq__event_session_obj.event_location_id ?? null}
+                            allow_null={true}
+                            select_options={location_select_options}
+                            on_success={() =>
+                                events_func.load_ae_obj_id__event_session({
+                                    api_cfg: $ae_api,
+                                    event_session_id: $lq__event_session_obj.id
+                                })}>
+                            <span
+                                class="bg-tertiary-500/10 text-tertiary-700 dark:text-tertiary-300 inline-flex items-center gap-1.5 rounded-full px-3 py-1 text-sm font-semibold transition-colors duration-200">
+                                <MapPin size="1em" class="text-xs" />
+                                {$lq__event_session_obj.event_location_name ?? 'No room assigned'}
+                            </span>
+                        </Element_ae_obj_field_editor>
+                    {:else if $lq__event_session_obj.event_location_name}
                         <span
                             class="bg-tertiary-500/10 text-tertiary-700 dark:text-tertiary-300 inline-flex items-center gap-1.5 rounded-full px-3 py-1 text-sm font-semibold transition-colors duration-200">
                             <MapPin size="1em" class="text-xs" />
@@ -228,32 +279,55 @@ $effect(() => {
         {/if}
     </div>
 
-    <!-- Description: shown only when present. Collapsed by default (can be long). -->
+    <!-- Description: collapsed by default in view mode (can be long).
-    {#if $lq__event_session_obj?.description}
+         In edit mode, show the editor directly — no collapse needed when staff are updating it. -->
+    {#if $lq__event_session_obj?.description || $ae_loc.edit_mode}
         <div
             class="border-surface-200-800 bg-surface-50-900 rounded-lg border px-4 py-3">
-            <button
+            {#if $ae_loc.edit_mode}
-                type="button"
+                <Element_ae_obj_field_editor
-                class="focus-visible:ring-primary-500 flex w-full items-center justify-between gap-2 rounded text-left focus-visible:ring-2"
+                    display_block={true}
-                onclick={() => (desc_expanded = !desc_expanded)}
+                    object_type="event_session"
-                aria-expanded={desc_expanded}>
+                    object_id={$lq__event_session_obj?.id}
-                <span
+                    field_name="description"
-                    class="text-xs font-bold tracking-wide uppercase opacity-40"
+                    field_type="textarea"
-                    >Description</span>
+                    edit_label="Description"
-                <span class="shrink-0 text-xs opacity-40">
+                    current_value={$lq__event_session_obj?.description ?? ''}
-                    {#if desc_expanded}
+                    placeholder="Session description..."
-                        <ChevronUp size="1em" />
+                    textarea_rows={4}
-                        <span class="sr-only">Collapse description</span>
+                    on_success={() =>
-                    {:else}
+                        events_func.load_ae_obj_id__event_session({
-                        <ChevronDown size="1em" />
+                            api_cfg: $ae_api,
-                        <span class="sr-only">Expand description</span>
+                            event_session_id: $lq__event_session_obj?.id
-                    {/if}
+                        })}>
-                </span>
+                    <span class="text-xs font-bold tracking-wide uppercase opacity-40">
-            </button>
+                        Description
-            {#if desc_expanded}
+                    </span>
-                <p class="mt-2 text-sm leading-relaxed whitespace-pre-wrap">
+                </Element_ae_obj_field_editor>
-                    {$lq__event_session_obj.description}
+            {:else}
-                </p>
+                <button
+                    type="button"
+                    class="focus-visible:ring-primary-500 flex w-full items-center justify-between gap-2 rounded text-left focus-visible:ring-2"
+                    onclick={() => (desc_expanded = !desc_expanded)}
+                    aria-expanded={desc_expanded}>
+                    <span
+                        class="text-xs font-bold tracking-wide uppercase opacity-40"
+                        >Description</span>
+                    <span class="shrink-0 text-xs opacity-40">
+                        {#if desc_expanded}
+                            <ChevronUp size="1em" />
+                            <span class="sr-only">Collapse description</span>
+                        {:else}
+                            <ChevronDown size="1em" />
+                            <span class="sr-only">Expand description</span>
+                        {/if}
+                    </span>
+                </button>
+                {#if desc_expanded}
+                    <p class="mt-2 text-sm leading-relaxed whitespace-pre-wrap">
+                        {$lq__event_session_obj?.description}
+                    </p>
+                {/if}
             {/if}
         </div>
     {/if}