Promote suggestion misses through the bulk-add modal, then delete them

Suggestion Misses' "Promote Selected" now opens the same bulk-add modal
shape as Suggestions' "Create Many" (editable phrases textarea +
lang/intent), prefilled with the selected misses' own text/language, and
submits via batchCreateSuggestions() so edited/added lines are honored.

Once that succeeds, the selected misses are deleted via the new
batchDeleteSuggestionMisses() (DELETE /admin/suggestion-misses/batch) so
they don't linger in the list now that they're suggestions. This is
best-effort: a failed cleanup doesn't undo the promotion, just surfaces a
separate warning notification.

app-modules/shared/src/Bnfexpress/BnfexpressAdminClient.php

@@ -275,6 +275,15 @@ class BnfexpressAdminClient
         ], fn (mixed $value): bool => $value !== null));
     }
 
+    /**
+     * @param  list<int|string>  $missIds
+     * @return array{deleted: int, skipped: int}
+     */
+    public function batchDeleteSuggestionMisses(array $missIds): array
+    {
+        return $this->request('DELETE', '/admin/suggestion-misses/batch', body: ['miss_ids' => $missIds]);
+    }
+
     // --- Suggestion sync/embeddings ------------------------------------------
 
     /**