Allow favorites to be sorted by type. Closes #314.

frontend/src/utils/conversationState.ts

@@ -13,10 +13,24 @@ const SORT_ORDER_KEY = 'remoteterm-sortOrder';
 const SIDEBAR_SECTION_SORT_ORDERS_KEY = 'remoteterm-sidebar-section-sort-orders';
 
 export type ConversationTimes = Record<string, number>;
-export type SortOrder = 'recent' | 'alpha';
+// 'type-*' orders group by contact/channel type first, then apply the sub-order.
+// They are only used by the Favorites section (every other section is single-type,
+// so type grouping is meaningless there and its toggle stays recent<->alpha).
+export type SortOrder = 'recent' | 'alpha' | 'type-recent' | 'type-alpha';
 export type SidebarSortableSection = 'favorites' | 'channels' | 'contacts' | 'rooms' | 'repeaters';
 export type SidebarSectionSortOrders = Record<SidebarSortableSection, SortOrder>;
 
+// Full cycle for the Favorites sort toggle, in click order.
+export const FAVORITES_SORT_CYCLE: SortOrder[] = ['recent', 'alpha', 'type-recent', 'type-alpha'];
+
+function coerceFavoritesSortOrder(value: unknown): SortOrder {
+  return (FAVORITES_SORT_CYCLE as unknown[]).includes(value) ? (value as SortOrder) : 'recent';
+}
+
+function coerceBasicSortOrder(value: unknown): SortOrder {
+  return value === 'alpha' ? 'alpha' : 'recent';
+}
+
 // In-memory cache of last message times (loaded from server on init)
 let lastMessageTimesCache: ConversationTimes = {};
 
@@ -106,11 +120,12 @@ export function loadLocalStorageSidebarSectionSortOrders(): SidebarSectionSortOr
 
     const parsed = JSON.parse(stored) as Partial<SidebarSectionSortOrders>;
     return {
-      favorites: parsed.favorites === 'alpha' ? 'alpha' : 'recent',
-      channels: parsed.channels === 'alpha' ? 'alpha' : 'recent',
-      contacts: parsed.contacts === 'alpha' ? 'alpha' : 'recent',
-      rooms: parsed.rooms === 'alpha' ? 'alpha' : 'recent',
-      repeaters: parsed.repeaters === 'alpha' ? 'alpha' : 'recent',
+      // Only Favorites may persist the type-grouped orders.
+      favorites: coerceFavoritesSortOrder(parsed.favorites),
+      channels: coerceBasicSortOrder(parsed.channels),
+      contacts: coerceBasicSortOrder(parsed.contacts),
+      rooms: coerceBasicSortOrder(parsed.rooms),
+      repeaters: coerceBasicSortOrder(parsed.repeaters),
     };
   } catch {
     return null;