feat(tauri): persist unpack logs and clean sidecar output

Unpack logs lived only in memory, so closing the app dropped history.
Unrar progress also flooded stdout with carriage-return redraws, which
made the log viewer noisy and hard to search.

Persist the last twenty entries to unpack-logs.json under the app data
directory, load them on startup, and rewrite stdout/stderr through a
small terminal-sequence cleaner (CR/LF, backspace, control chars) before
storage and display. Sort the unpack-logs window newest-first by finish
or start time.

Test plan:
- cargo test -p lanspread-tauri-deno-ts -- terminal_log unpack_log
- Run an unpack, restart the app, open unpack logs: prior entries remain
- Confirm progress lines collapse to final text instead of spam

Co-authored-by: Cursor <cursoragent@cursor.com>

crates/lanspread-tauri-deno-ts/src/UnpackLogsWindow.tsx

@@ -33,6 +33,9 @@ const formatLogTime = (timestampMs: number): string => {
     return new Date(timestampMs).toLocaleString();
 };
 
+const logSortTime = (entry: UnpackLogEntry): number =>
+    entry.finished_at_ms > 0 ? entry.finished_at_ms : entry.started_at_ms;
+
 const basename = (path: string): string => {
     const segments = path.split(/[\\/]/);
     return segments[segments.length - 1] || path;
@@ -97,6 +100,10 @@ export const UnpackLogsWindow = () => {
 
             out.push({ entry, originalIndex, stdoutLines, stderrLines, matchCount });
         });
+        out.sort((a, b) => {
+            const timestampDelta = logSortTime(b.entry) - logSortTime(a.entry);
+            return timestampDelta !== 0 ? timestampDelta : b.originalIndex - a.originalIndex;
+        });
         return out;
     }, [logs, errorsOnly, regex]);