fix(search): an edited message shows once, with its latest text (#288)

Server search also returns the m.replace events, so one message edited
twice came back as three rows. Fold edits into their message: one row
at the best-ranked position, showing the latest m.new_content and
pointing at the original event so Open jumps to the real message.

Fixes #288

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/features/message-search/useMessageSearch.ts

@@ -96,10 +96,58 @@ export const filterGroupsByDateRange = (
     .filter((group) => group.items.length > 0);
 };
 
+/**
+ * [Gitea #288] Server search also returns `m.replace` events, so an edited
+ * message showed once per version. Fold each edit into its message: one row,
+ * at the first position any version ranked, showing the latest text and
+ * pointing at the original event (so "jump" lands on the real message).
+ */
+export const foldEdits = (results: ISearchResult[]): ISearchResult[] => {
+  const targetOf = (r: ISearchResult): string => {
+    const rel = r.result.content?.['m.relates_to'];
+    return rel?.rel_type === 'm.replace' && typeof rel.event_id === 'string'
+      ? rel.event_id
+      : r.result.event_id;
+  };
+  const isEdit = (r: ISearchResult) => targetOf(r) !== r.result.event_id;
+  const order: string[] = [];
+  const originals = new Map<string, ISearchResult>();
+  const latestEdit = new Map<string, ISearchResult>();
+  results.forEach((r) => {
+    const target = targetOf(r);
+    if (!originals.has(target) && !latestEdit.has(target)) order.push(target);
+    if (!isEdit(r)) {
+      originals.set(target, r);
+      return;
+    }
+    const prev = latestEdit.get(target);
+    if (!prev || r.result.origin_server_ts > prev.result.origin_server_ts)
+      latestEdit.set(target, r);
+  });
+  return order.map((target) => {
+    const original = originals.get(target);
+    const edit = latestEdit.get(target);
+    const newContent = edit?.result.content?.['m.new_content'];
+    if (original && !newContent) return original;
+    if (original) {
+      return {
+        ...original,
+        result: {
+          ...original.result,
+          content: { ...original.result.content, 'm.new_content': newContent },
+        },
+      };
+    }
+    // Only an edit matched: show it as its message.
+    const only = edit as ISearchResult;
+    return { ...only, result: { ...only.result, event_id: target } };
+  });
+};
+
 const groupSearchResult = (results: ISearchResult[]): ResultGroup[] => {
   const groups: ResultGroup[] = [];
 
-  results.forEach((item) => {
+  foldEdits(results).forEach((item) => {
     const roomId = item.result.room_id;
     const resultItem: ResultItem = {
       rank: item.rank,