chore(mood): drop the manage module's unused exports

The layout hook, the cap mirrors and the layout type shipped unused —
the dead-code gate flags them; the section reads everything through the
manage query and the caps surface as server 422 toasts.

src/components/mood/manage/use-mood-tag-manage.ts

@@ -62,15 +62,6 @@ export interface ManageCatalog {
   categories: ManageCategory[];
 }
 
-export interface MoodTagLayout {
-  groupOrder?: string[];
-  placements?: Record<string, string[]>;
-}
-
-/** Per-user ceilings — mirror the server's 422 caps for friendly copy. */
-export const MAX_CUSTOM_TAGS = 50;
-export const MAX_CUSTOM_GROUPS = 12;
-
 export function useMoodTagManage(enabled: boolean) {
   return useQuery({
     queryKey: queryKeys.moodTagManage(),
@@ -80,14 +71,6 @@ export function useMoodTagManage(enabled: boolean) {
   });
 }
 
-export function useMoodTagLayout(enabled: boolean) {
-  return useQuery({
-    queryKey: queryKeys.moodTagLayout(),
-    queryFn: async () => apiGet<MoodTagLayout>("/api/mood/tags/layout"),
-    enabled,
-  });
-}
-
 /**
  * Invalidate every mood-tag read after a management mutation: the
  * `["mood-tag-catalog"]` prefix catches both the picker read and the

src/lib/mood/custom-tags.ts

@@ -21,7 +21,6 @@ import { MOOD_TAG_ICON_NAMES } from "@/lib/mood/icon-catalog";
 export const CUSTOM_TAG_KEY_PREFIX = "custom:";
 
 /** Stable category key + seeded id every custom tag hangs under. */
-export const CUSTOM_CATEGORY_KEY = "custom";
 export const CUSTOM_CATEGORY_ID = "mtc_custom";
 
 /** Per-user ceiling on custom tags (422 over the cap). */