Add passkey login and favorite search termsHEADmaster

Single-user auth: any registered passkey logs in as the owner. First
registration needs a one-time token that the app writes to
data/registration-token when no passkey exists yet; once logged in,
more passkeys can be added without a token.

Logged in, /favorites manages a list of terms (e.g. band names).
Events whose title or artist contains a term (NFKC + case-insensitive)
get a ★, and the event list gains an "お気に入りのみ" filter.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

3 files changed, 19 insertions, 2 deletions

diff --git a/app/components/EventCard.tsx b/app/components/EventCard.tsx
index b23742d..ad55a57 100644
--- a/app/components/EventCard.tsx
+++ b/app/components/EventCard.tsx
@@ -30,6 +30,7 @@ export default function EventCard({ event }: Props) {
       <div className="flex-1 p-4 flex flex-col gap-2">
         {/* Title */}
         <h2 className="font-semibold text-sm leading-snug group-hover:text-indigo-300 transition-colors line-clamp-2">
+          {event.is_favorite ? <span className="text-amber-400" title="お気に入り">★ </span> : null}
           {event.title}
         </h2>
 
diff --git a/app/components/EventListRow.tsx b/app/components/EventListRow.tsx
index 30800fb..42f3e8b 100644
--- a/app/components/EventListRow.tsx
+++ b/app/components/EventListRow.tsx
@@ -31,6 +31,7 @@ export default function EventListRow({ event }: Props) {
       {/* Title + artist */}
       <span className="flex-1 min-w-0">
         <span className="block truncate font-medium text-gray-100 group-hover:text-indigo-300 transition-colors">
+          {event.is_favorite ? <span className="text-amber-400" title="お気に入り">★ </span> : null}
           {event.title}
         </span>
         {event.artist && (
diff --git a/app/components/FilterBar.tsx b/app/components/FilterBar.tsx
index 7a95d2c..f897e67 100644
--- a/app/components/FilterBar.tsx
+++ b/app/components/FilterBar.tsx
@@ -6,9 +6,11 @@ interface Props {
   areas?: string[];
   defaultDateFrom?: string;
   defaultDateTo?: string;
+  /** Show the "favorites only" toggle (logged in only) */
+  showFavorites?: boolean;
 }
 
-export default function FilterBar({ venues, areas, defaultDateFrom, defaultDateTo }: Props) {
+export default function FilterBar({ venues, areas, defaultDateFrom, defaultDateTo, showFavorites }: Props) {
   const [searchParams] = useSearchParams();
 
   return (
@@ -98,6 +100,19 @@ export default function FilterBar({ venues, areas, defaultDateFrom, defaultDateT
         </select>
       </div>
 
+      {showFavorites && (
+        <label className="flex items-center gap-1.5 py-1.5 text-sm text-gray-300 cursor-pointer">
+          <input
+            name="fav"
+            type="checkbox"
+            value="1"
+            defaultChecked={searchParams.get("fav") === "1"}
+            className="accent-amber-400"
+          />
+          <span className="text-amber-400">★</span> お気に入りのみ
+        </label>
+      )}
+
       <button
         type="submit"
         className="rounded-md bg-gray-700 px-4 py-1.5 text-sm font-medium hover:bg-gray-600 transition-colors"
@@ -118,5 +133,5 @@ export default function FilterBar({ venues, areas, defaultDateFrom, defaultDateT
 }
 
 function hasFilters(params: URLSearchParams): boolean {
-  return ["keyword", "venue_id", "date_from", "date_to", "capacity_range", "area"].some((k) => params.get(k));
+  return ["keyword", "venue_id", "date_from", "date_to", "capacity_range", "area", "fav"].some((k) => params.get(k));
 }