fix(stats): use local timezone for peak reading hours

Pass the user's timezone settings to the database query to ensure the
Reading Clock widget groups peak reading hours correctly, instead of
defaulting to UTC.

Also includes a minor UI update to the KOReader plugin to expose a
download options button when multiple formats are available.

Closes #513

koreader-plugin/bookorbit.koplugin/bookorbit_catalog.lua

@@ -1781,6 +1781,14 @@ function BookOrbitCatalog:showBookActionSheet(detail, opts)
         UIManager:close(dialog)
         callback()
     end
+    local download_options_button = #supported_files > 0 and {
+        text = _("Download options"),
+        callback = function()
+            closeThen(function()
+                self:showDownloadOptions(detail)
+            end)
+        end,
+    } or nil
 
     if include_details or allow_select then
         local details_button = include_details and {
@@ -1841,6 +1849,10 @@ function BookOrbitCatalog:showBookActionSheet(detail, opts)
         end
     end
 
+    if download_options_button then
+        addRow(download_options_button)
+    end
+
     addRow({
         text = _("Set read status"),
         callback = function()
@@ -2917,11 +2929,7 @@ function BookOrbitCatalog:buildDetailHeader(detail, width, height)
             enabled = #supported_files > 0,
             text_font_size = 16,
             callback = function()
-                if #supported_files == 1 then
-                    self:downloadDefaultFile(detail, supported_files[1])
-                else
-                    self:showFileChoices(detail)
-                end
+                self:showDownloadOptions(detail)
             end,
         }
         table.insert(buttons_row, self.detail_download_button)