The current default value fallback logic for metadata just checks if a key is missing, or if it's value is undefined.
Since the keybinds are an object, a keybind that got newly added and wasn't saved to the metadata was never added with its default value to the object due to the metadata containing a "keybinds" key with an existing value
In case the last page of a manga was immediately visible or the became visible after the "image spread state" change, the chapter never got marked as read
Due to the way the pages got scrolled into view, the current page was not changed to the new page.
This then prevented the previous/next page to get opened via click/hotkey actions
The action to perform which gets determined on a tap zone click is always in the correct direction, thus, the direction for the "openPage" call has to be forced to be "LTR" to prevent inverting the direction
- open from outside reader
- is read
- yes: 1st page
- no : last read page
- inside reader via
- chapter selection: first page
- previous chapter : last page
- next chapter : first page
