Implement upsert label flow and use-based mark gone handling

src/features/stock/stock-list-page.js

@@ -1,8 +1,8 @@
 import {
-  deleteStockItem,
   listGroupedStockEntries,
   listStockEntries,
   updateStockItem,
+  useStockItem,
 } from '../../api/stock.js';
 import { fetchLocations } from '../../api/locations.js';
 import { createAsyncState, runAsyncState } from '../shared/ui-state.js';
@@ -1204,12 +1204,12 @@ export function stockListPageData(store) {
     },
     formatDate,
     async updateBinary(entry, level) {
-      await this.deleteEntry(entry);
+      await this.useEntry(entry);
     },
     async saveLevel(entry) {
       const level = this.editForms[entry.id]?.level || 'plenty';
       if (level === 'gone') {
-        await this.deleteEntry(entry);
+        await this.useEntry(entry);
         return;
       }
 
@@ -1229,7 +1229,7 @@ export function stockListPageData(store) {
       }, { quantity });
     },
     async markGone(entry) {
-      await this.deleteEntry(entry);
+      await this.useEntry(entry);
     },
     async saveEntryUpdate(entry, payload, localPatch) {
       this.editErrors[entry.id] = '';
@@ -1245,20 +1245,23 @@ export function stockListPageData(store) {
         this.editErrors[entry.id] = error.message || 'Update failed.';
       }
     },
-    async deleteEntry(entry) {
+    async useEntry(entry) {
       this.editErrors[entry.id] = '';
 
       try {
-        await deleteStockItem(store, entry.uuid_b64);
+        const result = await useStockItem(store, entry.uuid_b64);
         this.entries = this.entries.filter((candidate) => candidate.id !== entry.id);
         delete this.editForms[entry.id];
         delete this.editErrors[entry.id];
+        const alreadyGone = result.status === 'already_gone';
         store.addAlert({
-          type: 'success',
-          message: `${entry.name} was marked gone and removed from the list.`,
+          type: alreadyGone ? 'info' : 'success',
+          message: alreadyGone
+            ? `${entry.name} was already out of stock and removed from the list.`
+            : `${entry.name} was marked gone and removed from the list.`,
         });
       } catch (error) {
-        this.editErrors[entry.id] = error.message || 'Delete failed.';
+        this.editErrors[entry.id] = error.message || 'Mark gone failed.';
       }
     },
     replaceEntry(entryId, nextEntry) {