fix(bookkeeping): journal search finds a voucher by its label, with a spinner while searching (#1808)

"Sök verifikationstext" only matched journal_entries.description, so typing
A209 never returned voucher A209 itself: only other vouchers whose text
mentioned it. Users read that as "the voucher is missing".

A label-shaped needle (A209, a 209, A-209) now also matches
voucher_series + voucher_number via a PostgREST OR (needle double-quoted so
commas/parentheses stay literal); other needles keep the plain description
ILIKE. parseVoucher accepts one space or hyphen between series and number.
The search box shows a spinner while a server-side search is in flight;
before, the only signal was the list dimming.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

components/bookkeeping/JournalEntryList.tsx

@@ -1050,8 +1050,16 @@ export default function JournalEntryList({
             value={searchInput}
             onChange={(e) => setSearchInput(e.target.value)}
             containerClassName="min-w-0 max-w-none"
-            className="pr-7"
+            className={cn('pr-7', loading && search && 'pr-12')}
           />
+          {loading && search && (
+            // Search is server-side and can take a moment on a large ledger;
+            // without this the only signal was the list dimming.
+            <Loader2
+              className="absolute right-7 top-1/2 h-3.5 w-3.5 -translate-y-1/2 animate-spin text-muted-foreground"
+              aria-hidden="true"
+            />
+          )}
           {searchInput && (
             <button
               type="button"