fix(downloads): harden add modal and retry state

Route explicit no-limit speed overrides without inheriting the global cap.

Preserve dotted media titles when switching formats and drain retry gid completions through remember_gid.

src/index.css

@@ -1801,6 +1801,7 @@ body.is-resizing .column-resize-handle:hover::after {
   border-radius: 6px;
   color: hsl(var(--text-primary));
   font-size: var(--download-row-font-size);
+  overflow: hidden;
   user-select: none;
   -webkit-user-select: none;
 }