fix(downloads): restore actionable package states and extraction controls

Resolve child archive selections to complete multipart sets, support bulk package extraction, refresh extraction passwords at execution time, and keep archive failures scoped by their full paths.

Restore sortable download columns, preserve verified availability, classify package retry and extraction states, secure link copying through the preload bridge, and release cancelled provider work without stale cooldowns.

tests/i18n.test.ts

@@ -171,6 +171,15 @@ describe("renderer localization", () => {
     ["Geplant: Heute 22:15", "Scheduled: Today 22:15"],
     ["Tonspur: 2 OK · 1 ohne DE-Tag · ffmpeg fehlt · 3 Fehler", "Audio track: 2 OK · 1 without DE tag · ffmpeg missing · 3 errors"],
     ["4/8 fertig · 2 Fehler", "4/8 completed · 2 errors"],
+    ["7 Entpackfehler · 1 Wiederholung", "7 extraction errors · 1 retry"],
+    ["Download fertig · 1 Entpackfehler", "Download complete · 1 extraction error"],
+    ["Jetzt entpacken (2)", "Extract now (2)"],
+    ["1 Entpackfehler", "1 extraction error"],
+    ["2 Wiederholungen", "2 retries"],
+    ["Download fertig", "Download complete"],
+    ["1 Fehler · 2 abgebrochen", "1 error · 2 cancelled"],
+    ["1 Entpackfehler · 2 Fehler", "1 extraction error · 2 errors"],
+    ["Warte auf Festplatte", "Waiting for disk"],
     ["Entpacken 52%", "Extracting 52%"],
     ["Fehlgeschlagen nach 3 Versuchen: HTTP 503 von https://host.test/a", "Failed after 3 attempts: HTTP 503 von https://host.test/a"],
     ["Update-Check fehlgeschlagen: ECONNRESET https://api.test/v1", "Update check failed: ECONNRESET https://api.test/v1"],