fix(pres_mgmt): use tmp_sort_2 for presentation sort in Pres Mgmt and Launcher

Compute presentation-specific tmp_sort_1/tmp_sort_2 in specific_processor,
overriding the generic values from _process_generic_props which had two bugs:
- priority encoded as 0/1 ASC (backwards — true should sort first)
- sort stored as unpadded string ("10" < "2" lexicographically)
- start_datetime and code not included (presentation-specific fields)

New encoding: priority(inv)_sort(8-padded)_start_datetime_code[_name]
Both liveQueries (Pres Mgmt session page, Launcher session view) now use
.sortBy('tmp_sort_2') — cleaner and uses the indexed field.

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

src/lib/ae_events/ae_events__event_presentation.ts

@@ -680,6 +680,20 @@ export async function process_ae_obj__event_presentation_props({
             if (obj.event_session_id_random)
                 obj.event_session_id = obj.event_session_id_random;
             if (obj.event_id_random) obj.event_id = obj.event_id_random;
+
+            // Override generic tmp_sort_* with presentation-specific encoding.
+            // WHY: Generic _process_generic_props encodes priority as 0/1 ASC (backwards)
+            // and sort as an unpadded string ("10" < "2"). Presentations also need
+            // start_datetime and code in the sort chain, which are not generic fields.
+            // Desired order: priority DESC → sort ASC → start_datetime ASC → code ASC → name ASC
+            // Encoding trick: invert priority so true→'0' sorts before false→'1' ascending.
+            const p = obj.priority ? '0' : '1';
+            const s = String(Number(obj.sort ?? 0)).padStart(8, '0');
+            const dt = obj.start_datetime ?? '';
+            const code = obj.code ?? '';
+            const name = obj.name ?? '';
+            obj.tmp_sort_1 = `${p}_${s}_${dt}_${code}`;
+            obj.tmp_sort_2 = `${p}_${s}_${dt}_${code}_${name}`;
             return obj;
         }
     });

src/routes/events/[event_id]/(launcher)/launcher_session_view.svelte

@@ -91,9 +91,8 @@ let lq__event_file_obj_li = $derived.by(() => {
 
 // Event Presentation
 // WHY: $derived.by — captures id in the outer closure so a new Observable is
-// created whenever the session changes. Multi-field sort requires toArray() + JS
+// created whenever the session changes. tmp_sort_2 encodes the full sort chain:
-// comparator since Dexie's sortBy() is single-field only.
+// priority DESC → sort ASC → start_datetime ASC → code ASC → name ASC
-// Order: priority DESC → sort ASC → start_datetime ASC → code ASC → name ASC
 let lq__event_presentation_obj_li = $derived.by(() => {
     const id = slct__event_session_id;
     return liveQuery(async () => {
@@ -103,32 +102,10 @@ let lq__event_presentation_obj_li = $derived.by(() => {
             console.log(`[LQ] Fetching presentations for session: ${id}`);
         }
 
-        const results = await db_events.presentation
+        return await db_events.presentation
             .where('event_session_id')
             .equals(id)
-            .toArray();
+            .sortBy('tmp_sort_2');
-        return results.sort((a, b) => {
-            // priority DESC (true first)
-            const pa = a.priority ? 1 : 0;
-            const pb = b.priority ? 1 : 0;
-            if (pb !== pa) return pb - pa;
-            // sort ASC
-            const sa = a.sort ?? 0;
-            const sb = b.sort ?? 0;
-            if (sa !== sb) return sa - sb;
-            // start_datetime ASC
-            const da = a.start_datetime ?? '';
-            const db_val = b.start_datetime ?? '';
-            if (da !== db_val) return da < db_val ? -1 : 1;
-            // code ASC
-            const ca = a.code ?? '';
-            const cb = b.code ?? '';
-            if (ca !== cb) return ca < cb ? -1 : 1;
-            // name ASC
-            const na = a.name ?? '';
-            const nb = b.name ?? '';
-            return na < nb ? -1 : na > nb ? 1 : 0;
-        });
     });
 });
 

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

@@ -67,40 +67,18 @@ let lq__event_session_obj = $derived(
 );
 
 // 2. Presentation List Observable
-// WHY: Dexie sortBy() is single-field only. Multi-field sort requires toArray() + JS comparator.
+// WHY: tmp_sort_2 encodes priority DESC → sort ASC → start_datetime ASC → code ASC → name ASC
-// Desired order: priority DESC → sort ASC → start_datetime ASC → code ASC → name ASC
+// as a lexicographically correct string. See process_ae_obj__event_presentation_props.
 let lq__event_presentation_obj_li = $derived(
     liveQuery(async () => {
         if (log_lvl)
             console.log(
                 `[LQ] Querying Presentations for Session: ${url_session_id}`
             );
-        const results = await db_events.presentation
+        return await db_events.presentation
             .where('event_session_id')
             .equals(url_session_id)
-            .toArray();
+            .sortBy('tmp_sort_2');
-        return results.sort((a, b) => {
-            // priority DESC (true first)
-            const pa = a.priority ? 1 : 0;
-            const pb = b.priority ? 1 : 0;
-            if (pb !== pa) return pb - pa;
-            // sort ASC
-            const sa = a.sort ?? 0;
-            const sb = b.sort ?? 0;
-            if (sa !== sb) return sa - sb;
-            // start_datetime ASC
-            const da = a.start_datetime ?? '';
-            const db_val = b.start_datetime ?? '';
-            if (da !== db_val) return da < db_val ? -1 : 1;
-            // code ASC
-            const ca = a.code ?? '';
-            const cb = b.code ?? '';
-            if (ca !== cb) return ca < cb ? -1 : 1;
-            // name ASC
-            const na = a.name ?? '';
-            const nb = b.name ?? '';
-            return na < nb ? -1 : na > nb ? 1 : 0;
-        });
     })
 );