fix(feed): a reset clears the card's resume position at once, not only its status

The optimistic layer overrode only the status, so after "Reset — clear watch progress/status" the
card kept its progress bar and its Continue button until the next refetch. Found in the E28 S3e1
UAT.

frontend/src/components/Feed.tsx

@@ -145,6 +145,9 @@ export default function Feed({
     : SORT_KEYS;
   const [overrides, setOverrides] = useState<Record<string, VideoStatus>>({});
   const [savedOverrides, setSavedOverrides] = useState<Record<string, boolean>>({});
+  // A reset drops the resume position too, which a status override cannot say: without this the card
+  // kept its progress bar and its Continue button until the next refetch.
+  const [resetIds, setResetIds] = useState<Record<string, true>>({});
   // The open player: which video and where to start (null = resume from saved position).
   const [activeVideo, setActiveVideo] = useState<{ video: Video; startAt: number | null } | null>(
     null,
@@ -238,6 +241,7 @@ export default function Feed({
     setOverridesFor(filters);
     setOverrides({});
     setSavedOverrides({});
+    setResetIds({});
   }
   // ...but NOT on infinite-scroll appends: fetchNextPage also bumps dataUpdatedAt while page 1's
   // rows are unchanged, so clearing overrides there would make a just-hidden card flash back.
@@ -250,6 +254,7 @@ export default function Feed({
     if (!appended) {
       setOverrides({});
       setSavedOverrides({});
+      setResetIds({});
     }
   }, [query.dataUpdatedAt, pagesLen]);
 
@@ -350,6 +355,7 @@ export default function Feed({
       // Reset to pristine (drop the whole VideoState row, incl. resume position) — the
       // un-watch toggle can't clear an in-progress position, this can.
       setOverrides((o) => ({ ...o, [id]: "new" }));
+      setResetIds((r) => ({ ...r, [id]: true }));
       api
         .clearState(id)
         // Stale-mark only (see setState above): the optimistic override already reset the card.
@@ -361,6 +367,11 @@ export default function Feed({
             delete next[id];
             return next;
           });
+          setResetIds((r) => {
+            const next = { ...r };
+            delete next[id];
+            return next;
+          });
         });
     },
     [qc],
@@ -395,6 +406,7 @@ export default function Feed({
         const status = overrides[v.id]; // read once so the narrowing sticks
         return status ? { ...v, status } : v;
       })
+      .map((v) => (resetIds[v.id] ? { ...v, position_seconds: 0 } : v))
       .map((v) => {
         const saved = savedOverrides[v.id];
         return saved !== undefined ? { ...v, saved } : v;