fix(torrent): harden metadata reuse and live peer telemetry

- reuse validated tracker-bearing metainfo without restoring direct web seeds
- preserve Torrent file selection while making long paths scrollable and copyable
- add lifecycle-fenced peer and seeder summaries to Properties telemetry
- validate cache tracker metadata and cover malformed, stale, and path-copy cases

src/utils/torrentFilePath.ts

@@ -0,0 +1,9 @@
+export type ClipboardWriter = (text: string) => Promise<void>;
+
+/** Copy the exact Torrent-relative path without normalizing or truncating it. */
+export const copyTorrentFilePath = async (
+  path: string,
+  writeText: ClipboardWriter,
+): Promise<void> => {
+  await writeText(path);
+};