style(frontend): Prettier config + one-time repo-wide format pass

Prettier 3 (pinned), printWidth 100, double quotes — chosen to match the existing
hand-formatting and minimise reflow. This commit is ONLY the mechanical format pass
(`prettier --write`) plus the config/ignore/scripts, isolated so it never pollutes a
feature diff. Verified behaviour-neutral: typecheck, eslint (0 errors), and vitest
all green before and after. See .git-blame-ignore-revs — `git blame` skips this sha.

frontend/src/components/ShareDialog.tsx

@@ -23,7 +23,10 @@ function UserShare({ job }: { job: DownloadJob }) {
     const s = q.trim().toLowerCase();
     if (!s) return list.slice(0, 8);
     return list
-      .filter((u) => u.email.toLowerCase().includes(s) || (u.display_name ?? "").toLowerCase().includes(s))
+      .filter(
+        (u) =>
+          u.email.toLowerCase().includes(s) || (u.display_name ?? "").toLowerCase().includes(s),
+      )
       .slice(0, 8);
   }, [q, list]);
 
@@ -107,19 +110,37 @@ function LinkRow({ link, onChanged }: { link: ShareLink; onChanged: () => void }
   const badges: string[] = [];
   if (link.has_password) badges.push(t("downloads.share.hasPassword"));
   if (link.allow_download) badges.push(t("downloads.share.downloadable"));
-  if (link.expires_at) badges.push(t("downloads.share.expiresOn", { date: new Date(link.expires_at).toLocaleDateString() }));
+  if (link.expires_at)
+    badges.push(
+      t("downloads.share.expiresOn", { date: new Date(link.expires_at).toLocaleDateString() }),
+    );
 
   return (
     <div className="rounded-lg glass-card p-2.5 space-y-2">
       <div className="flex items-center gap-2">
         <Link2 className="w-4 h-4 text-muted shrink-0" />
-        <input readOnly value={fullUrl} className="flex-1 min-w-0 bg-transparent text-xs text-muted truncate outline-none" />
-        <button onClick={copy} title={t("downloads.share.copy")} className="p-1.5 rounded-md hover:bg-surface text-muted hover:text-fg transition">
+        <input
+          readOnly
+          value={fullUrl}
+          className="flex-1 min-w-0 bg-transparent text-xs text-muted truncate outline-none"
+        />
+        <button
+          onClick={copy}
+          title={t("downloads.share.copy")}
+          className="p-1.5 rounded-md hover:bg-surface text-muted hover:text-fg transition"
+        >
           {copied ? <Check className="w-4 h-4 text-emerald-400" /> : <Copy className="w-4 h-4" />}
         </button>
         <button
           onClick={async () => {
-            if (await confirm({ title: t("downloads.share.revoke"), message: t("downloads.share.revokeConfirm"), confirmLabel: t("downloads.share.revoke"), danger: true }))
+            if (
+              await confirm({
+                title: t("downloads.share.revoke"),
+                message: t("downloads.share.revokeConfirm"),
+                confirmLabel: t("downloads.share.revoke"),
+                danger: true,
+              })
+            )
               revoke.mutate();
           }}
           title={t("downloads.share.revoke")}
@@ -129,7 +150,9 @@ function LinkRow({ link, onChanged }: { link: ShareLink; onChanged: () => void }
         </button>
       </div>
       <div className="flex items-center gap-2 text-xs text-muted flex-wrap">
-        <span className="inline-flex items-center gap-1"><Eye className="w-3 h-3" /> {t("downloads.share.views", { n: link.view_count })}</span>
+        <span className="inline-flex items-center gap-1">
+          <Eye className="w-3 h-3" /> {t("downloads.share.views", { n: link.view_count })}
+        </span>
         {badges.map((b) => (
           <span key={b} className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded bg-surface">
             {b === t("downloads.share.hasPassword") && <Lock className="w-3 h-3" />}
@@ -149,7 +172,10 @@ function LinkRow({ link, onChanged }: { link: ShareLink; onChanged: () => void }
 function LinkShare({ job }: { job: DownloadJob }) {
   const { t } = useTranslation();
   const qc = useQueryClient();
-  const links = useQuery({ queryKey: ["download-links", job.id], queryFn: () => api.downloadLinks(job.id) });
+  const links = useQuery({
+    queryKey: ["download-links", job.id],
+    queryFn: () => api.downloadLinks(job.id),
+  });
   const [creating, setCreating] = useState(false);
   const [allowDownload, setAllowDownload] = useState(false);
   const [expiryDays, setExpiryDays] = useState<number | null>(null);
@@ -191,7 +217,11 @@ function LinkShare({ job }: { job: DownloadJob }) {
       {creating ? (
         <div className="mt-2 rounded-lg border border-border p-3 space-y-3">
           <label className="flex items-center gap-2 text-sm cursor-pointer">
-            <input type="checkbox" checked={allowDownload} onChange={(e) => setAllowDownload(e.target.checked)} />
+            <input
+              type="checkbox"
+              checked={allowDownload}
+              onChange={(e) => setAllowDownload(e.target.checked)}
+            />
             {t("downloads.share.allowDownload")}
           </label>
           <div className="flex items-center gap-2 text-sm">
@@ -202,10 +232,14 @@ function LinkShare({ job }: { job: DownloadJob }) {
                 onClick={() => setExpiryDays(d)}
                 className={clsx(
                   "px-2 py-1 rounded-md border text-xs transition",
-                  expiryDays === d ? "border-accent bg-accent/10 text-accent" : "border-border text-muted hover:text-fg"
+                  expiryDays === d
+                    ? "border-accent bg-accent/10 text-accent"
+                    : "border-border text-muted hover:text-fg",
                 )}
               >
-                {d === null ? t("downloads.share.expiryNever") : t("downloads.share.days", { n: d })}
+                {d === null
+                  ? t("downloads.share.expiryNever")
+                  : t("downloads.share.days", { n: d })}
               </button>
             ))}
           </div>
@@ -218,10 +252,17 @@ function LinkShare({ job }: { job: DownloadJob }) {
             autoComplete="new-password"
           />
           <div className="flex justify-end gap-2">
-            <button onClick={() => setCreating(false)} className={clsx(btnCls, "text-muted hover:text-fg hover:bg-surface")}>
+            <button
+              onClick={() => setCreating(false)}
+              className={clsx(btnCls, "text-muted hover:text-fg hover:bg-surface")}
+            >
               {t("common.cancel")}
             </button>
-            <button onClick={() => create.mutate()} disabled={create.isPending} className={clsx(btnCls, "bg-accent text-accent-fg hover:opacity-90")}>
+            <button
+              onClick={() => create.mutate()}
+              disabled={create.isPending}
+              className={clsx(btnCls, "bg-accent text-accent-fg hover:opacity-90")}
+            >
               {t("downloads.share.createLink")}
             </button>
           </div>
@@ -229,7 +270,10 @@ function LinkShare({ job }: { job: DownloadJob }) {
       ) : (
         <button
           onClick={() => setCreating(true)}
-          className={clsx(btnCls, "mt-2 border border-border text-muted hover:text-fg hover:border-muted inline-flex items-center gap-1.5")}
+          className={clsx(
+            btnCls,
+            "mt-2 border border-border text-muted hover:text-fg hover:border-muted inline-flex items-center gap-1.5",
+          )}
         >
           <Link2 className="w-4 h-4" /> {t("downloads.share.newLink")}
         </button>